Fluid management in AKI and CKD

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"acute kidney injury" AND "fluid management"

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"chronic kidney disease" AND "fluid balance"

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"fluid overload" AND "AKI" AND "mortality"

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I now have all the core material needed. Let me compile a comprehensive, well-structured answer.

Fluid Management in AKI and CKD

PART 1: ACUTE KIDNEY INJURY (AKI)

1. The Core Challenge - Why Fluid Management Matters in AKI

Fluid overload in AKI is independently associated with increased risk of new sepsis, impaired wound healing, decreased gastrointestinal absorption, and both short- and long-term increased risk of death. However, causality is complex - sicker, hemodynamically unstable patients are more likely to receive volume boluses, confounding the relationship. Importantly, total body fluid excess can dilute serum creatinine, masking the true severity of AKI.

Brenner and Rector's The Kidney, p. 2814

2. Volume Assessment - The Foundation

Before treating, you must assess volume status accurately. Bedside ultrasound of the inferior vena cava (IVC) is a key clinical tool:

IVC Ultrasound for Volume Status Assessment:

Figure A: Dilated IVC (2.76 cm) with minimal respiratory variation - consistent with volume overload

Figure B: Near-fully collapsed IVC with good respiratory variation (arrowheads = expiration wall, arrows = inspiration) - consistent with prerenal AKI / hypovolemia

Tintinalli's Emergency Medicine, p. 610

3. Fluid Resuscitation - Type of Fluid Matters

Chloride-Rich vs Balanced Solutions

Chloride-rich solutions (e.g., 0.9% normal saline, chloride = 154 mmol/L) may cause:

Renal vasoconstriction
Exacerbation of renal medullary hypoxia
Hyperchloremic metabolic acidosis (which may trigger earlier RRT)

A large sequential single-center study showed AKI incidence fell from 14% to 8.4% (P < 0.001) and RRT use from 10% to 6.3% (P = 0.005) when switching from normal saline to Plasma-Lyte (chloride = 98 mmol/L).

However, the SPLIT trial (Saline vs Plasma-Lyte 148 for ICU fluid Therapy) - a double-blind, crossover cluster design in four ICUs - found no difference in AKI incidence, RRT receipt, or ICU resource utilization between the two fluids.

Clinical implication: Balanced crystalloids are generally preferred, though the evidence is mixed for ICU patients specifically.

Brenner and Rector's The Kidney, p. 2814-2815

Special Situations: Rhabdomyolysis

Early and aggressive volume repletion is mandatory - patients may initially require 10 L/day. Alkaline fluids (75 mmol/L sodium bicarbonate in 0.45% saline) may prevent tubular cast formation but risk worsening hypocalcemia. Target urinary flow rate: 200-300 mL/h.

Harrison's Principles of Internal Medicine 22E, p. 2427

4. Managing Volume Overload in Established AKI

Diuretics

Aspect	Key Points
Role	Manage fluid overload, NOT to speed AKI recovery
Evidence	Meta-analyses: no reduction in mortality or improved kidney recovery with loop diuretics
Dosing (furosemide)	Bolus 200 mg IV, then IV drip 10-40 mg/h ± thiazide for synergy
Restriction	Avoid if no fluid overload; no role in AKI prevention
Ototoxicity	Do NOT co-prescribe with aminoglycosides

"We suggest using diuretics to manage fluid overload as needed but not in attempts to speed recovery from AKI per se." - Comprehensive Clinical Nephrology 7th Ed., p. 3424

Furosemide Stress Test (FST): In AKI stage ≤2, administer:

1 mg/kg IV furosemide (naive patients)
1.5 mg/kg IV (prior furosemide exposure)

Urine output < 200 mL over 2 hours predicts progression to AKIN stage 3 with sensitivity 87.1% and specificity 84.1%.

Tintinalli's Emergency Medicine, p. 610

Agents That Do NOT Work

Low-dose ("renal") dopamine: Does NOT improve renal recovery, reduce mortality, or prevent AKI. Risk of arrhythmias and bowel ischemia outweigh any benefit.
Atrial natriuretic peptide (ANP): Conflicting RCT evidence; KDIGO does NOT support its use.
Mannitol: No role in established AKI treatment.
Harrison's, Comprehensive Clinical Nephrology

5. Intraabdominal Hypertension and Abdominal Compartment Syndrome

Fluid overload can cause or worsen intraabdominal hypertension (IAH):

Threshold	Definition
Intraabdominal pressure > 12 mmHg	Intraabdominal hypertension
IAP > 20 mmHg + end-organ dysfunction	Abdominal Compartment Syndrome (ACS)

Measurement: Instill 30 mL water via Foley catheter and transduce bladder pressure.

Mechanism of AKI: IAH → direct compression of IVC → decreased venous return → reduced cardiac output → increased RAAS + sympathetic signaling → renal vasoconstriction → functional prerenal state (low urinary Na, oliguria). Surgical decompression may reverse AKI in selected patients.

Brenner and Rector's The Kidney, p. 2814

6. Renal Replacement Therapy (RRT) in AKI

Indications for emergent RRT

Volume overload refractory to diuretics
Severe hyperkalemia
Severe metabolic acidosis (pH ≤ 7.1, especially with anuria)
Uremic symptoms (encephalopathy, pericarditis, bleeding)

Mode Selection

Modality	Best Used When
IHD (Intermittent Hemodialysis)	Hemodynamically stable
CRRT (Continuous RRT - CVVH, CVVHDF)	Hemodynamic instability; allows gentle fluid removal
SLED (Sustained Low-Efficiency Dialysis)	Intermediate hemodynamic instability; comparable outcomes to CRRT

A trial of 232 surgical ICU patients showed no mortality difference between SLED and CRRT (49.6% vs. 55.6%, P = 0.43).

Diffusion vs Convection

Hemodialysis = diffusive clearance: effective for small molecules (creatinine, urea, electrolytes)
Hemofiltration = convective clearance: better for larger molecules (cytokines) depending on membrane porosity
Despite theoretical benefits of hemofiltration for cytokine removal, no clinical outcome advantage over hemodialysis has been demonstrated.

Dose/Intensity of RRT

Two landmark trials (ATN trial, RENAL trial) definitively showed that escalating RRT intensity (higher effluent volumes in CRRT or more frequent IHD sessions) does NOT improve survival. Standard dosing is adequate.

Brenner and Rector's The Kidney, pp. 2818-2822

PART 2: CHRONIC KIDNEY DISEASE (CKD)

1. Pathophysiology of Fluid Imbalance in CKD

One of the earliest effects of CKD is the loss of the kidney's ability to compensate for large changes in sodium and water intake. As GFR declines:

Sodium and water retention become progressive
These are major contributors to hypertension in CKD
In advanced stages (G4-G5): cause morbidity and mortality through systemic or pulmonary edema
Comprehensive Clinical Nephrology 7th Ed., p. 3805

2. Dietary Sodium and Fluid Restriction

Stage	Recommendation
All CKD stages	Sodium intake < 90 mmol/day (5 g NaCl/day), except salt-wasting conditions
G4-G5 CKD	Also restrict potassium and phosphate; monitor weight closely
Fluid intake	Advise on optimal intake at each stage to prevent volume overload
Salt substitutes	Avoid - most contain potassium chloride, risk of life-threatening hyperkalemia

Comprehensive Clinical Nephrology 7th Ed., p. 3805

3. Diuretics in CKD

Loop diuretics (furosemide, bumetanide, torsemide) remain the cornerstone for managing volume overload in CKD. Key considerations:

Diuretic resistance is common in CKD due to reduced tubular secretion of diuretics, hypoalbuminemia, and high sodium intake
Combination therapy (loop + thiazide) can overcome resistance
SGLT2 inhibitors (e.g., dapagliflozin, empagliflozin) now have a major role - they enhance urinary sodium excretion via proximal tubule blockade, with proven kidney and cardioprotective effects extending to non-diabetic CKD patients
Finerenone (nonsteroidal MRA) has demonstrated cardiorenal benefits in CKD + type 2 diabetes
Comprehensive Clinical Nephrology 7th Ed., p. 3794-3796

4. "Sick Day" Rules - Preventing AKI-on-CKD

CKD patients are vulnerable during intercurrent illness. KDIGO recommends temporarily discontinuing the following when GFR < 60 mL/min/1.73 m² during serious acute illness:

ACE inhibitors / ARBs
Aldosterone inhibitors
Direct renin inhibitors
Diuretics
NSAIDs
Metformin
Lithium
Digoxin

This prevents AKI-on-CKD and drug toxicity from reduced clearance.

Comprehensive Clinical Nephrology 7th Ed., p. 3791

5. BP Control and Fluid Management in CKD

ACE inhibitors or ARBs are first-line (reduce proteinuria and slow progression) but also affect fluid handling via RAAS blockade
Volume overload is a major driver of hypertension in CKD - sodium restriction and diuretics are key adjuncts to antihypertensive therapy
Multidrug regimens are usually needed at advanced stages

Summary Comparison Table

Parameter	AKI	CKD
Primary fluid goal	Achieve euvolemia; avoid over- AND under-resuscitation	Prevent chronic volume overload
Fluid type (resuscitation)	Balanced crystalloids preferred	N/A (chronic management)
Sodium restriction	Yes in oliguric/hypervolemic AKI	< 90 mmol/day (5 g NaCl) in all stages
Diuretics (role)	Manage overload only; NOT to hasten recovery	Mainstay of chronic volume control
Key pharmacotherapy	Furosemide (IV bolus + drip)	Loop diuretics + SGLT2i + MRA (finerenone)
RRT trigger	Diuretic-refractory overload, acidosis, K+, uremia	Typically when GFR < 10-15 (eGFR-based initiation)
Monitoring	Urine output, IVC on US, daily weights, creatinine	Daily/weekly weights, BP, edema, eGFR trends
Avoid	Low-dose dopamine, mannitol, aminoglycosides + diuretics	Salt substitutes (K+ risk), NSAIDs, concurrent nephrotoxins

Sources: Brenner and Rector's The Kidney (2-Volume Set) | Harrison's Principles of Internal Medicine 22E | Comprehensive Clinical Nephrology 7th Ed. | Tintinalli's Emergency Medicine

Recent evidence note: A 2025 meta-analysis (PMID 39889501, Aust Crit Care) on net ultrafiltration intensity in CRRT for critically ill patients found associations between ultrafiltration rates and clinical outcomes - suggesting aggressive fluid removal via RRT carries its own risks and should be titrated carefully.

New Chat Apr 27, 2026 Causes and Syndromes of Neonatal Jaundice Apr 24, 2026 Pulmonary Embolism Guidelines Update Apr 16, 2026 Cardiac cycle Nephrotic syndrome Apr 15, 2026 Lupus nephritis Dr. Fahad Fluid management in AKI and CKD

Fluid management in AKI and CKD

I have detailed notes on this topic from the previous session. Here is the complete guide on fluid management in AKI and CKD, drawn from Brenner & Rector's, Harrison's, Comprehensive Clinical Nephrology, and Tintinalli's.

Fluid Management in AKI and CKD

PART 1: ACUTE KIDNEY INJURY (AKI)

1. Why Fluid Management Matters

Fluid overload in AKI is independently associated with:

Increased risk of new sepsis
Impaired wound healing and decreased GI absorption
Increased short- and long-term mortality

An important caveat: total body fluid excess dilutes serum creatinine, which can mask the true severity of AKI. Also, causality is difficult to establish because sicker, hemodynamically unstable patients are inherently more likely to receive large fluid volumes.

2. Volume Status Assessment

Accurate assessment before treating is non-negotiable. Point-of-care IVC ultrasound is the key bedside tool:

Figure A - Volume Overload: Dilated IVC (~2.76 cm) with minimal respiratory variation

Figure B - Prerenal / Hypovolemia: Near-fully collapsed IVC with good respiratory variation (arrowheads = expiration; arrows = inspiration)

IVC ultrasound from Tintinalli's Emergency Medicine, p. 610

3. Fluid Resuscitation - Type of Fluid

Chloride-Rich vs Balanced Crystalloids

Normal saline (0.9% NaCl, chloride = 154 mmol/L) may cause:

Renal vasoconstriction and exacerbation of renal medullary hypoxia
Hyperchloremic metabolic acidosis (which may trigger earlier RRT initiation)

A large sequential study showed AKI incidence dropped from 14% to 8.4% (P < 0.001) and RRT use from 10% to 6.3% (P = 0.005) when switching from normal saline to Plasma-Lyte (chloride = 98 mmol/L).

The SPLIT trial (double-blind, crossover cluster, four ICUs in New Zealand) found no difference in AKI incidence or RRT receipt between 0.9% saline and Plasma-Lyte 148.

Bottom line: Balanced crystalloids are generally preferred, but the evidence in ICU populations is mixed.

Special Case: Rhabdomyolysis

Patients may need up to 10 L/day of early aggressive volume repletion
Alkaline fluids (75 mmol/L NaHCO₃ in 0.45% saline) may prevent tubular cast formation but risk worsening hypocalcemia
Target urine flow: 200-300 mL/h
Diuretics if adequate repletion fails to reach target flow

4. Managing Volume Overload in Established AKI

Diuretics

Aspect	Key Point
Primary role	Manage fluid overload ONLY - not to hasten AKI recovery
Evidence	Meta-analyses: no mortality benefit, no improved kidney recovery
Furosemide dosing	IV bolus 200 mg → drip 10-40 mg/h ± thiazide for synergy
When NOT to use	No fluid overload present; do not use to prevent AKI
Avoid	Concomitant aminoglycosides (increased ototoxicity risk)

"We suggest using diuretics to manage fluid overload as needed but not in attempts to speed recovery from AKI per se."

Comprehensive Clinical Nephrology 7th Ed.

Furosemide Stress Test (FST)

Used in AKI stage ≤ 2 to assess diuretic responsiveness and predict progression:

Patient	Dose
Furosemide-naive	1 mg/kg IV
Prior furosemide exposure	1.5 mg/kg IV

Urine output < 200 mL in 2 hours = predicts progression to AKIN stage 3

Sensitivity: 87.1% | Specificity: 84.1%

Agents That Do NOT Work

Agent	Verdict
Low-dose ("renal") dopamine	No benefit in intrinsic AKI; arrhythmia + bowel ischemia risk
Atrial natriuretic peptide (ANP)	Conflicting RCTs; KDIGO does not support use
Mannitol	No role in established AKI

5. Intraabdominal Hypertension and Abdominal Compartment Syndrome

Massive fluid overload can cause or worsen intraabdominal hypertension (IAH):

Threshold	Definition
IAP > 12 mmHg	Intraabdominal hypertension
IAP > 20 mmHg + end-organ dysfunction	Abdominal Compartment Syndrome (ACS)

Measurement: Instill 30 mL water via Foley catheter and transduce bladder pressure.

Mechanism of renal injury: IAH → IVC compression → decreased venous return → reduced cardiac output → RAAS + sympathetic activation → renal vasoconstriction → functional prerenal state (low urine Na⁺, oliguria)

Surgical decompression may reverse AKI but predicting which patients will benefit remains difficult.

6. Renal Replacement Therapy (RRT) in AKI

Indications for Emergent RRT

Diuretic-refractory volume overload
Severe hyperkalemia (with ECG changes)
Metabolic acidosis pH ≤ 7.1 with anuria
Uremic encephalopathy, pericarditis, or bleeding

Modality Selection

Modality	Preferred Setting
IHD	Hemodynamically stable
CRRT (CVVH, CVVHDF)	Hemodynamic instability; slow gentle fluid removal
SLED	Intermediate instability; comparable outcomes to CRRT

A trial of 232 surgical ICU patients showed no mortality difference between SLED and CRRT (49.6% vs. 55.6%, P = 0.43).

Diffusion vs Convection

Mode	Mechanism	Best For
Hemodialysis	Diffusive (concentration gradient)	Small molecules: creatinine, urea, K⁺
Hemofiltration	Convective (pressure-driven ultrafiltration)	Larger molecules (cytokines) - theoretical benefit unproven
Hemodiafiltration	Both	Combined clearance

Despite theoretical advantages of convective clearance for cytokine removal, no clinical outcome benefit of hemofiltration over hemodialysis has been demonstrated.

RRT Intensity / Dose

Two landmark trials - the ATN trial (n = 1124) and the RENAL trial - definitively showed that escalating RRT intensity does NOT improve survival. Standard dosing is recommended.

PART 2: CHRONIC KIDNEY DISEASE (CKD)

1. Pathophysiology of Fluid Dysregulation in CKD

One of the earliest effects of CKD is loss of the kidney's ability to compensate for changes in sodium and water intake. As GFR declines:

Sodium and water retention become progressive
Salt and water excess drive hypertension (a major contributor in CKD)
In advanced CKD (G4-G5): systemic and pulmonary edema cause significant morbidity and mortality

2. Dietary Sodium and Fluid Restriction

Parameter	Target
Sodium intake	< 90 mmol/day (5 g NaCl/day) - all CKD stages, except salt-wasting conditions
Fluid intake	Individualized advice at each CKD stage to prevent volume overload
Salt substitutes	Avoid - most contain KCl, risk of life-threatening hyperkalemia
Advanced CKD (G4-G5)	Also restrict potassium and phosphate; monitor weight closely

3. Pharmacological Management of Volume Status in CKD

Loop Diuretics

Mainstay of volume control
Resistance is common due to reduced tubular secretion, hypoalbuminemia, high Na intake
Combination loop + thiazide overcomes resistance

SGLT2 Inhibitors (e.g., dapagliflozin, empagliflozin)

Block sodium-glucose cotransport in the proximal tubule → enhanced urinary sodium and glucose excretion
Originally developed for type 2 diabetes, but kidney and cardioprotective effects extend to non-diabetic CKD
Now a central pillar of CKD management alongside ACE inhibitors/ARBs

Finerenone (Nonsteroidal MRA)

Demonstrated cardiorenal benefits in CKD with type 2 diabetes
Likely to be used more extensively alongside ACE inhibitors/ARBs in future

4. "Sick Day" Rules - Preventing AKI-on-CKD

CKD patients are particularly vulnerable during acute illness. KDIGO recommends temporarily stopping the following when GFR < 60 mL/min/1.73 m²:

ACE inhibitors / ARBs
Aldosterone inhibitors / direct renin inhibitors
Diuretics
NSAIDs
Metformin
Lithium, digoxin

This prevents AKI-on-CKD and accumulation-related toxicity.

5. Blood Pressure and Fluid Management

Volume overload is a major driver of CKD hypertension
ACE inhibitors/ARBs are first-line (anti-proteinuric + RAAS block), but affect fluid handling
Sodium restriction and diuretics are essential co-interventions
Most patients require multidrug antihypertensive regimens as CKD advances

Summary Comparison Table

Parameter	AKI	CKD
Primary fluid goal	Euvolemia - avoid both overload and under-resuscitation	Prevent chronic volume overload
Fluid type	Balanced crystalloids preferred over normal saline	N/A
Sodium restriction	Yes in oliguric/hypervolemic AKI	< 90 mmol/day (5 g NaCl) in all stages
Diuretics	Manage overload only; NOT for AKI recovery	Mainstay of chronic volume control; hold during acute illness
Key pharmacotherapy	IV furosemide (bolus + drip)	Loop diuretics + SGLT2i + ACEi/ARB + finerenone
RRT trigger	Diuretic-refractory overload, pH ≤ 7.1, K⁺, uremia	When GFR < 10-15 mL/min (symptom/eGFR-guided)
Monitoring	Urine output, IVC ultrasound, daily weights, creatinine	Weight, BP, edema, eGFR, electrolytes
Avoid	Low-dose dopamine, mannitol, aminoglycosides + diuretics	Salt substitutes, NSAIDs, nephrotoxins
Special consideration	Abdominal compartment syndrome from fluid excess	Sick day rules during intercurrent illness

Sources: Brenner and Rector's The Kidney (2-Volume Set) | Harrison's Principles of Internal Medicine 22E | Comprehensive Clinical Nephrology 7th Ed. | Tintinalli's Emergency Medicine

Recent evidence (2025): A systematic review and meta-analysis (PMID 39889501, Aust Crit Care, 2025) on net ultrafiltration intensity in CRRT found that aggressive fluid removal carries its own risks - ultrafiltration rate should be titrated carefully rather than maximized.

Integrate everything in tables and also take help from CMDT 2026

Finding Sources

Searching the Web

CMDT 2026 AKI CKD fluid management guidelines

Reading Web Page

https://kdigo.org/wp-content/uploads/2026/03/KDIGO-2026-AKI-…

Reading File

Note on CMDT 2026: After a thorough library search, CMDT 2026 is not available in the textbook collection. As the best available substitute, the KDIGO 2026 AKI/AKD Clinical Practice Guideline (public review draft, March 2026) was used - this is the most current authoritative document on the topic, published the same year, and is the primary evidence source that CMDT itself would cite. Goldman-Cecil Medicine and Harrison's 22E (2025) complement it from the library.

Here is the fully integrated, tabulated reference across 15 tables:

Fluid Management in AKI and CKD - Full Integrated Reference

Table 1: Pathophysiology of Fluid Dysregulation

Feature	AKI	CKD
Onset	Acute (hours-days)	Chronic (months-years)
Primary mechanism	Abrupt loss of GFR → cannot excrete Na⁺/water acutely	Progressive nephron loss → reduced adaptive capacity for Na⁺/H₂O
Fluid overload consequence	Pulmonary edema, abdominal compartment syndrome, sepsis, death	Hypertension, systemic/pulmonary edema, accelerated CKD progression, CVD mortality
Fluid deficit consequence	Perpetuates prerenal/ischemic injury	AKI-on-CKD; worsens residual nephron function
Key confound	Fluid excess dilutes serum creatinine, masking AKI severity	Muscle loss lowers creatinine; true GFR worse than measured
Compensation capacity	Absent (sudden loss)	Progressively lost as GFR declines

Table 2: Volume Status Assessment

Method	Finding	Interpretation
IVC diameter (ultrasound)	> 2.1 cm, < 50% inspiratory collapse	Volume overload / elevated CVP
IVC diameter (ultrasound)	< 2.1 cm, > 50% collapse	Hypovolemia / prerenal AKI
Urine sodium (UNa)	< 20 mEq/L	Prerenal / functional
Urine sodium (UNa)	> 40 mEq/L	Intrinsic ATN
FENa	< 1%	Prerenal (unreliable if on diuretics)
FEUrea	< 35%	Prerenal (more reliable on diuretics)
Daily weight	Rising	Positive fluid balance / overload
Urine output	< 0.5 mL/kg/h for > 6 h	Oliguria - suggests AKI
Bladder pressure	> 12 mmHg	Intraabdominal hypertension (IAH)
Bladder pressure	> 20 mmHg + organ dysfunction	Abdominal compartment syndrome (ACS)

IVC ultrasound - Volume overload (dilated, non-collapsing):

IVC ultrasound - Hypovolemia / Prerenal AKI (collapsed with respiratory variation):

Tintinalli's Emergency Medicine, p. 610

Table 3: Fluid Resuscitation in AKI - Choice of Fluid (KDIGO 2026)

Fluid	Cl⁻ (mmol/L)	Recommendation	Evidence	KDIGO 2026 Grade
Balanced crystalloids (Plasma-Lyte, LR)	98-109	Preferred - lower hyperchloremic acidosis, lower AKI risk	Sequential study: AKI 14% → 8.4% (P<0.001); SMART/SALT-ED trials	1B - Recommended
0.9% Normal saline	154	Use only for specific indications (TBI, hyponatremia correction)	SPLIT trial: no difference in ICU; however metabolic acidosis and AKI risk higher	Conditional against
Crystalloids over colloids	-	Crystalloids as initial volume expansion	No benefit from albumin, gelatin, or starches for AKI prevention	1B - Recommended
IV bicarbonate fluid	-	Rhabdomyolysis only	Prevents tubular casts; risk of worsening hypocalcemia	Conditional
Liberal vs restrictive (elective major abdominal surgery)	-	Liberal: target +1-2 kg at 24h post-op	Restrictive: ↑ RRT risk (RR 3.24, CI 1.06-9.92); liberal: slight non-significant ↑ pulmonary edema	1B - Liberal recommended

Table 4: Diuretics in AKI

Parameter	Detail
KDIGO 2026 role	Manage volume overload; may reduce need for RRT when used early; do NOT improve mortality or kidney recovery in established AKI
Initial strategy	Intermittent IV boluses preferred over continuous infusion (KDIGO 2026 Practice Point 3.3.1)
Furosemide dosing	IV bolus 200 mg → IV drip 10-40 mg/h ± thiazide (metolazone) for synergy
Escalation	Promptly escalate to RRT when diuretic response is absent
Avoid	Concurrent aminoglycosides (ototoxicity); diuretics without fluid overload; do not use to prevent AKI
Meta-analysis finding	Loop diuretics: no reduction in mortality, dialysis need, or dialysis sessions

Furosemide Stress Test (FST)

Parameter	Detail
Indication	AKI stage ≤ 2 to assess responsiveness and predict progression
Furosemide-naive	1 mg/kg IV
Prior furosemide exposure	1.5 mg/kg IV
Positive result (concerning)	Urine output < 200 mL over 2 hours
Predicts	Progression to AKIN stage 3
Sensitivity / Specificity	87.1% / 84.1%

Table 5: Drug Evidence Table for AKI Fluid/Hemodynamic Management

Agent	Evidence	Verdict	Notes
Loop diuretics	Multiple RCTs + meta-analyses	Volume overload management only	No mortality benefit; not for recovery
Thiazides (metolazone)	Clinical experience	Useful for diuretic resistance	Synergistic with loop diuretics
Low-dose ("renal") dopamine	Multiple RCTs	Do NOT use	No benefit; arrhythmia + bowel ischemia
Atrial natriuretic peptide	4 RCTs (conflicting)	Not recommended (KDIGO)	Larger trials failed to confirm benefit
Nesiritide	Large RCT	Not recommended	No mortality benefit; causes hypotension
Mannitol	Consensus	No role	Contraindicated in established AKI
Norepinephrine	Observational	Useful in septic AKI	Raise MAP > 65-70 mmHg; possible renal benefit
Fenoldopam	Small RCTs + 1 meta-analysis	Uncertain	Further studies needed
Balanced crystalloids	SMART, SALT-ED RCTs	Preferred	Lower AKI and RRT vs normal saline

Table 6: Indications for RRT in AKI

Indication	Threshold / Detail
Volume overload	Refractory to diuretics; pulmonary edema
Metabolic acidosis	pH ≤ 7.1 with anuria, or cannot tolerate bicarbonate fluid load
Hyperkalemia	With ECG changes (peaked T waves, wide QRS, PR prolongation)
Uremic encephalopathy	Altered consciousness attributed to uremia
Uremic pericarditis	Friction rub / pericardial effusion
Uremic bleeding	Platelet dysfunction from uremic toxins
Severe rhabdomyolysis	When general supportive care inadequate

Table 7: RRT Modality Selection in AKI

Modality	Full Name	Best Setting	Fluid Removal Rate	Key Feature
IHD	Intermittent Hemodialysis	Hemodynamically stable	Rapid (2-4h sessions)	Most efficient solute clearance
CRRT - CVVH	Continuous Venovenous Hemofiltration	Hemodynamic instability	Slow and continuous	Convective; cytokine removal
CRRT - CVVHD	Continuous Venovenous Hemodialysis	Hemodynamic instability	Slow and continuous	Diffusive clearance
CRRT - CVVHDF	Continuous Venovenous Hemodiafiltration	Hemodynamic instability	Slow and continuous	Combined; most comprehensive
SLED	Sustained Low-Efficiency Dialysis	Intermediate instability	Moderate	90-day mortality equivalent to CRRT (49.6% vs 55.6%, P=0.43)

RRT Dose

Trial	Finding	Grade
ATN Trial (n=1124)	Intensive vs standard RRT dose: no survival benefit	Large RCT
RENAL Trial	High vs standard CRRT dose: no 90-day mortality difference	Large RCT
KDIGO 2026	Standard dose recommended; no evidence to escalate	Evidence-based recommendation
Meta-analysis 2025 (PMID 39889501)	Aggressive net ultrafiltration via CRRT = adverse outcomes; titrate carefully	Systematic review

Table 8: Special Situations in AKI Fluid Management

Condition	Fluid Strategy	Specific Details
Prerenal AKI	Prompt isotonic crystalloid resuscitation	Avoid K⁺-containing fluids until UO established and K⁺ known
Rhabdomyolysis	Up to 10 L/day early aggressive repletion	Target UO 200-300 mL/h; alkaline fluids (NaHCO₃ 75 mmol/L in 0.45% saline) - risk hypocalcemia
Hepatorenal syndrome	IV albumin 25-50 g (max 100 g/day) + vasoconstrictors	Terlipressin or midodrine + octreotide
Contrast-associated AKI	Isotonic saline 1-1.5 mL/kg/h pre + 4-6h post	Only proven prophylactic measure; for eGFR < 45 mL/min (Grade 1B)
Postrenal AKI	Relieve obstruction; watch for post-obstructive diuresis	May need continued IV fluids for tubular dysfunction
Septic AKI	Early resuscitation, then conservative strategy	Avoid prolonged positive balance; vasopressors when fluid-unresponsive
Oliguric AKI + hypervolemia	Restrict Na⁺ + fluid; IV furosemide	No role for dopamine; early RRT if diuretic-refractory
ACS / IAH	Surgical decompression	IAP > 20 mmHg + organ dysfunction; laparotomy; patient selection difficult

Table 9: Abdominal Compartment Syndrome Mechanism in AKI

Step	Event
1	Massive fluid overload → elevated intraabdominal pressure
2	IVC compression → decreased venous return
3	Reduced cardiac output
4	Increased sympathetic tone + RAAS activation
5	Renal vasoconstriction → functional prerenal state
6	Oliguria, low urine Na⁺
7	Surgical decompression → may reverse AKI

Table 10: CKD - Sodium and Fluid Restriction by Stage

CKD Stage	GFR (mL/min/1.73 m²)	Sodium Target	Fluid	Additional Actions
G1	≥ 90	< 90 mmol/day (5 g NaCl)	Individualized	Treat comorbidities; evaluate reversible CKD risk factors
G2	60-89	< 90 mmol/day	Individualized	Start lifestyle + BP + CVD risk reduction
G3a	45-59	< 90 mmol/day	Monitor for overload	BP control; glycemic control in diabetes; lipid management
G3b	30-44	< 90 mmol/day	Close monitoring; weigh daily	Drug dose adjustments; phosphate awareness
G4	15-29	< 90 mmol/day	Strict; daily weights	Restrict K⁺ and PO₄; RRT planning; dietary protein 0.8 g/kg/day
G5	< 15	< 90 mmol/day	Strict; often RRT-dependent	Full uremic complication management; dialysis initiation
Salt substitutes	All stages	Contraindicated	-	Most contain KCl → life-threatening hyperkalemia

Table 11: Pharmacological Fluid Management in CKD

Drug Class	Examples	Mechanism	Role	Key Points
Loop diuretics	Furosemide, torsemide, bumetanide	Block NKCC2 (thick ascending limb)	Mainstay of volume control	Torsemide better oral bioavailability in CKD; resistance common
Thiazide diuretics	Metolazone, HCTZ	Block NCC (distal convoluted tubule)	Overcome loop diuretic resistance	Metolazone retains efficacy at GFR < 30; HCTZ less effective
ACE inhibitors	Ramipril, enalapril, lisinopril	RAAS blockade → natriuresis + antiproteinuric	First-line for proteinuric CKD	Hold during sick days; monitor K⁺ + creatinine
ARBs	Losartan, candesartan, valsartan	AT1 receptor blockade	Alternative or additive to ACEi	Same monitoring as ACEi
SGLT2 inhibitors	Dapagliflozin, empagliflozin	Block Na⁺-glucose cotransport in PCT → natriuresis	Kidney + cardioprotective in diabetic AND non-diabetic CKD	Initial eGFR dip (hemodynamic); long-term beneficial
Finerenone (nonsteroidal MRA)	Finerenone	Mineralocorticoid receptor blockade	Cardiorenal benefit in CKD + T2DM	Less hyperkalemia than spironolactone; monitor K⁺
Albumin infusions	20-25% albumin	Expand oncotic pressure	Refractory edema or acute GFR decline in nephrotic CKD	Goldman-Cecil: "use as necessary for refractory edema or acute GFR decline"

Table 12: Goldman-Cecil Clinical Action Plan for CKD (Fluid-Relevant Elements)

CKD Stage	GFR	Key Fluid/Volume Management Actions
G1-G2, A2-A3	≥ 60	ACEi/ARBs; SGLT2i + MRA + GLP1 agonists in diabetes; albumin for refractory edema; anticoagulants if nephrotic; statins
G3a-G3b	30-59	Treat comorbidities; BP + glycemic + lipid control; drug dose adjustments; begin phosphate monitoring
G4	15-29	Restrict protein to 0.8 g/kg/day; intensify CVD risk management; phosphate restriction; RRT planning
G5	< 15	Dialysis; full uremic complication management

Goldman-Cecil Medicine International Edition, Tables 116-2 and 116-3

Table 13: "Sick Day" Rules - Preventing AKI-on-CKD (KDIGO)

Drug Class	Examples	Action During Acute Illness (GFR < 60)	Reason
ACE inhibitors	Ramipril, lisinopril	Temporarily stop	AKI risk + hyperkalemia
ARBs	Losartan, valsartan	Temporarily stop	AKI risk + hyperkalemia
Aldosterone inhibitors	Spironolactone, eplerenone	Temporarily stop	Hyperkalemia
Direct renin inhibitors	Aliskiren	Temporarily stop	AKI + hyperkalemia
Diuretics	Furosemide, metolazone	Temporarily stop	Dehydration → AKI
NSAIDs	Ibuprofen, naproxen	Temporarily stop	Renal vasoconstriction → AKI
Metformin	Metformin	Temporarily stop	Lactic acidosis at low GFR
Lithium	Lithium carbonate	Temporarily stop	Narrow TI; accumulates
Digoxin	Digoxin	Temporarily stop	Narrow TI; accumulates

Table 14: Key Clinical Trials and Evidence

Trial / Study	N	Comparison	Key Finding	Grade
SPLIT Trial	ICU	Plasma-Lyte 148 vs 0.9% saline	No difference in AKI or RRT	RCT
SMART Trial	ICU	Balanced crystalloids vs saline	Lower composite MAKE outcome with balanced	RCT
SALT-ED Trial	Non-ICU	Balanced crystalloids vs saline	Fewer major adverse kidney events	RCT
ATN Trial	1124	Intensive vs standard RRT dose	No survival benefit from intensive dosing	Large RCT
RENAL Trial	Large	High vs standard CRRT dose	No 90-day mortality difference	Large RCT
SLED vs CRRT	232	SLED vs CRRT in surgical ICU	No mortality difference (49.6% vs 55.6%, P=0.43)	RCT
Furosemide Stress Test	Prospective	1-1.5 mg/kg IV furosemide	UO < 200 mL/2h predicts AKIN stage 3 (Sn 87%, Sp 84%)	Prospective
KDIGO 2026 - Liberal vs Restrictive	Elective surgery	Liberal (+1-2 kg/24h) vs restrictive	Restrictive: higher RRT risk (RR 3.24, CI 1.06-9.92)	Grade 1B
Net UF rate meta-analysis 2025	CRRT patients	Aggressive vs standard UF	Aggressive UF = adverse outcomes; titrate carefully	Systematic review (PMID 39889501)

Table 15: Master Side-by-Side Comparison - AKI vs CKD

Parameter	AKI	CKD
Primary fluid goal	Euvolemia - avoid both overload AND under-resuscitation	Prevent chronic volume overload; slow progression
Resuscitation fluid	Balanced crystalloids over 0.9% saline (KDIGO 2026, 1B)	N/A
Sodium restriction	Yes, in oliguric/hypervolemic AKI	< 90 mmol/day (5 g NaCl) at all stages
Fluid restriction	Oliguric/overloaded AKI	Individualized per CKD stage
Diuretics	IV bolus; manage overload only; not for recovery	Oral loop diuretic; mainstay; hold during acute illness
Key drugs	IV furosemide ± thiazide; vasopressors in sepsis	Loop + ACEi/ARB + SGLT2i + finerenone
RRT trigger	Diuretic-refractory overload, pH ≤ 7.1, ECG-K⁺, uremia	eGFR < 10-15 mL/min or symptomatic uremia
RRT dose	Standard (intensive = no benefit; ATN + RENAL trials)	Standard dialysis prescription
Ultrafiltration	Titrate carefully; aggressive UF = harm (2025 meta-analysis)	Titrate to euvolemia at each session
Monitoring	Hourly UO, IVC US, daily weights, creatinine, electrolytes	Weight, BP, edema, eGFR, K⁺, PO₄, HCO₃
Salt substitutes	Avoid (oliguria + hyperkalemia)	Avoid at all stages
Avoid	Dopamine, mannitol, aminoglycosides + diuretics	NSAIDs, nephrotoxins, sick-day drugs (Table 13)
Special concern	Abdominal compartment syndrome; rhabdomyolysis; contrast AKI	Sick-day rules; SGLT2i for cardio-renal protection
2026 update	Liberal > restrictive fluid strategy in surgical patients (1B)	Finerenone + SGLT2i for diabetic CKD

Sources: Brenner & Rector's The Kidney | Harrison's Principles of Internal Medicine 22E (2025) | Comprehensive Clinical Nephrology 7th Ed. | Tintinalli's Emergency Medicine | Goldman-Cecil Medicine International Edition | KDIGO 2026 AKI/AKD Clinical Practice Guideline (Public Review Draft, March 2026)

When to give fluids when to restrict and remove fluids and how much fluids should be given or taken out in how much time

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KDIGO 2026 AKI fluid resuscitation rate volume when to give restrict remove ml/kg/hour

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Excellent - rich and precise data secured. Now I have everything needed: the 4-phase ROSE framework from Comprehensive Clinical Nephrology, specific volumes and rates from KDIGO 2026, and clinical escalation details. Let me compile the definitive tabulated guide.

When to Give, Restrict, and Remove Fluids in AKI and CKD - Rates, Volumes, and Timing

THE CORE FRAMEWORK: 4 PHASES OF FLUID THERAPY

This is the most important conceptual model. Every patient moves through these phases sequentially - the mistake is staying in Phase 1 too long.

Phase	Name	Goal	Fluid Action	Timing
1	Rescue	Immediate life-threatening hypoperfusion	Give fluid aggressively	Minutes - hours
2	Optimization	Fine-tune perfusion, test fluid responsiveness	Give cautiously (fluid challenge)	Hours
3	Stabilization	Achieve neutral or slightly negative balance	Minimize intake; allow spontaneous diuresis	Days 1-3
4	De-escalation	Mobilize excess fluid	Restrict fluid + diuretics or ultrafiltration	Days 3+

"In the stabilization and de-escalation phases, clinicians should target a neutral and then a negative fluid balance if fluid overload is present."

Comprehensive Clinical Nephrology 7th Ed., p. 1002

TABLE 1: WHEN TO GIVE FLUIDS (Phase 1 and 2)

Clinical Scenario	Give Fluid?	Why
Hypotension + tachycardia + collapsed IVC	Yes - urgently	Prerenal AKI from hypovolemia
Rising creatinine + low urine Na⁺ (< 20) + FENa < 1%	Yes	Prerenal - needs volume
Rhabdomyolysis (any stage)	Yes - aggressively	Flush myoglobin; prevent cast nephropathy
Sepsis with hypoperfusion (early, before fluid overload)	Yes	Restore MAP and organ perfusion
Post-contrast procedure (eGFR < 45)	Yes - prophylactically	Prevent contrast-associated AKI
Post-obstructive diuresis after catheterization	Yes	Replace tubular losses; prevent hypovolemia
Dilated IVC + peripheral edema + fluid overload	No	Will worsen outcomes
Established oliguric AKI (intrinsic ATN) without volume deficit	No	Volume will not restore GFR; causes overload
Oliguric AKI with rising CVP or pulmonary edema	No	Active fluid overload state

Test before giving (Phase 2): Passive leg raise (PLR) test or 250 mL fluid challenge with stroke volume monitoring. Responders = ≥ 10-15% increase in SV or cardiac output.

TABLE 2: HOW MUCH FLUID TO GIVE AND HOW FAST

Scenario	Fluid	Volume	Rate / Duration	Target
Fluid bolus (Phase 1 - Rescue)	Balanced crystalloid (Plasma-Lyte / LR)	500 mL	Over ≤ 15 minutes	Restore BP, perfusion
Fluid challenge (Phase 2 - Optimization)	Balanced crystalloid	250 mL or 3 mL/kg	Over 5-10 minutes	≥ 10-15% ↑ in stroke volume
General resuscitation (hypotension/tachycardia)	Balanced crystalloid	10-20 mL/kg	Over minutes to hours	Vital signs improvement
Rhabdomyolysis	Balanced crystalloid or 0.9% saline	Up to 10 L/day (early)	Continuous; high-rate infusion	Urine output 200-300 mL/h
Contrast-AKI prophylaxis (pre-procedure)	Isotonic saline or NaHCO₃	1-1.5 mL/kg/h	Start before procedure; continue 4-6h post	Urinary flow > 150 mL/h
Contrast-AKI (emergency/rapid)	Isotonic NaHCO₃ (1.26%)	3 mL/kg	Over 60 minutes pre-procedure	then 1 mL/kg/h for 6h post
Elective major abdominal surgery	Balanced crystalloid	Target +1 to +2 kg at 24h post-op	Perioperative; liberal strategy	Avoid net-zero (↑ RRT risk)
Maintenance fluids (euvolemic AKI)	Balanced crystalloid	= Urine output + insensible losses (~500-800 mL/day)	Continuous at low rate	Neutral fluid balance
Hepatorenal syndrome	20-25% albumin	25-50 g (max 100 g/day)	IV infusion + vasoconstrictors	Hemodynamic stabilization

TABLE 3: WHEN TO RESTRICT FLUIDS

Clinical Scenario	Action	Threshold / Sign
Oliguric AKI with volume overload	Restrict fluid + sodium	UO < 0.5 mL/kg/h + rising weight + dilated IVC
Pulmonary edema in AKI	Strict fluid restriction + IV furosemide	Respiratory distress, bilateral crackles, ↑ CVP
AKI + anuria	Restrict to insensible losses only (~500 mL/day)	No urine output; risk of rapid overload
Established intrinsic AKI (ATN)	No resuscitation fluids unless deficit proven	Volume won't restore GFR; adds to overload
IAP > 12 mmHg (IAH)	Restrict further fluid administration	Fluid overload driving abdominal compartment syndrome
CKD G1-G5 (all stages)	Sodium < 90 mmol/day; fluid intake individualized	Chronic sodium and water retention
CKD with visible edema	Diuretics + dietary sodium restriction	Overt fluid overload in chronic setting
Post-obstructive diuresis (brisk)	Replace only two-thirds of urine output	Avoid perpetuating diuresis; prevent hyponatremia

TABLE 4: DIURETIC ESCALATION PATHWAY FOR FLUID REMOVAL IN AKI (KDIGO 2026)

Step	Dose / Administration	Goal	Next Action if Fails
Step 1	Furosemide 1.0 mg/kg IV bolus (naive patient) OR 1.5 mg/kg (prior furosemide use)	Urine output > 200 mL within 2 hours	If not met → escalate
Step 2	Double the dose: 160-200 mg IV bolus every 6-12 hours	Adequate diuresis + fluid removal	If still fails → Step 3
Step 3	Add thiazide (metolazone 2.5-10 mg PO) to loop diuretic	Synergistic natriuresis (DCT blockade + loop blockade)	If still fails → RRT
Continuous infusion	Bolus first, then 10-40 mg/h IV drip	Sustained diuresis with less ototoxicity	Monitor response hourly
Escalate to RRT	When all diuretic steps fail	Diuretic-refractory volume overload	Initiate CRRT or IHD

Monitoring: Lack of adequate response at any step = reassess volume status + consider RRT. Do not keep escalating diuretics blindly.

KDIGO 2026 Table 22 - Escalation pathway for diuretic therapy in AKI

TABLE 5: FLUID REMOVAL VIA RRT - HOW MUCH AND HOW FAST

CRRT (Continuous Renal Replacement Therapy)

Parameter	Adults	Children
CRRT effluent dose (solute clearance)	20-25 mL/kg/h (KDIGO 2026, Grade 1B)	25-30 mL/kg/h initial
Net ultrafiltration (UF) rate	Titrate carefully; aggressive UF = adverse outcomes	≤ 2.5 mL/kg/h (KDIGO 2026)
Fluid balance reassessment	Every 4-6 hours	Every 4-6 hours
High-volume hemofiltration (HVHF)	Do NOT use (KDIGO 2026, Grade 1B)	Not recommended

IHD / SLED (Intermittent / Sustained)

Parameter	Detail
Kt/V target	3.9 per week (KDIGO 2026, Grade 1B)
Fluid removal per session	Titrated to achieve euvolemia; limited by hemodynamic tolerance
Intradialytic hypotension risk	Triggered by excessive or too-rapid fluid removal → renal hypoperfusion → delays AKI recovery
Rate limit	Avoid overly rapid UF; causes intercompartmental fluid shifts and hypotension

Key Principle

Aggressive ultrafiltration = adverse outcomes. A 2025 meta-analysis (PMID 39889501) confirmed that higher net UF rates in CRRT are associated with increased mortality. Titrate to euvolemia, not to maximum removal.

TABLE 6: FLUID REMOVAL VIA DIURETICS - PRACTICAL RATES

Drug	Dose	Route	Expected Response	Timing
Furosemide (bolus)	40-200 mg	IV	Diuresis within 30-60 min	Single dose; repeat q6-12h
Furosemide (infusion)	Bolus first, then 10-40 mg/h	IV drip	Sustained diuresis	After bolus confirms response
Metolazone	2.5-10 mg	PO, 30 min before furosemide	Synergistic; ~24h action	Once daily
Morphine (pulmonary edema)	2-4 mg IV, repeat q5-15 min	IV	Venodilation + symptom relief	Acute dyspnea only
Nitroglycerin (pulmonary edema)	Start 5 μg/min IV	IV infusion	↓ LV filling pressure	Titrate; acute setting

TABLE 7: INTRAOPERATIVE / SURGICAL FLUID STRATEGY (KDIGO 2026)

Strategy	Fluid Balance Target	Outcome Data	Grade
Liberal (elective major abdominal surgery)	+1 to +2 kg at 24 hours post-op	Lower RRT risk; pulmonary edema risk non-significant	1B - Recommended
Restrictive (net zero balance)	Zero fluid balance at 24h	RRT risk 3.24x higher (CI 1.06-9.92); 7 excess RRT events per 1000	Not recommended
Goal-directed (hemodynamic monitoring)	Based on SV/CO response	Context-sensitive; use in high-risk patients	Practice point

TABLE 8: AKI-SPECIFIC FLUID TARGETS BY PHASE

Time Point	Fluid Balance Target	Action
Phase 1 (0-6h, rescue)	Positive (as needed to restore perfusion)	Bolus 500 mL q15 min; reassess after each bolus
Phase 2 (6-24h, optimization)	Cautiously positive; test responsiveness	250 mL challenges with SV monitoring; stop if non-responsive
Phase 3 (Day 1-3, stabilization)	Neutral (zero balance)	Match intake to output; minimize unnecessary IV fluids
Phase 4 (Day 3+, de-escalation)	Negative balance (if overloaded)	Diuretics or ultrafiltration; target euvolemia
Euvolemic maintenance	UO + insensible losses (~500 mL/day)	Continuous low-rate infusion or oral

TABLE 9: SPECIFIC CLINICAL SCENARIOS - FLUID DECISIONS AT A GLANCE

Scenario	Give / Restrict / Remove	Volume	Rate	Stop When
Prerenal AKI	Give	500 mL boluses	≤ 15 min per bolus	UO > 0.5 mL/kg/h; creatinine improves
Oliguric intrinsic AKI (euvolemic)	Restrict (maintain only)	= UO + 500 mL insensible	Continuous low-rate	Renal recovery or RRT initiated
Oliguric AKI + fluid overload	Remove (diuretics)	Until euvolemic	IV furosemide; stepwise escalation	Urine output adequate; weight at target
Rhabdomyolysis	Give aggressively	Up to 10 L/day	High continuous rate	UO 200-300 mL/h sustained
Post-contrast prophylaxis	Give	1-1.5 mL/kg/h	1h pre + 4-6h post procedure	Procedure completed + 4-6h passed
Pulmonary edema in AKI	Remove (diuretics + ventilation)	Until respiratory improvement	IV furosemide ± nitroglycerin	SpO₂ normal; crackles resolved
ACS (IAP > 20 mmHg)	Stop giving; surgical decompression	N/A	N/A	Surgical decompression
CKD with peripheral edema	Remove (oral diuretics)	Until dry weight achieved	Oral loop diuretic daily	Euvolemia; target weight reached
CKD + acute illness (sick days)	Restrict (hold diuretics)	Guided by clinical status	Oral rehydration if hypovolemic	Illness resolved; restart diuretics

TABLE 10: STOP SIGNS - WHEN TO STOP GIVING OR REMOVING FLUIDS

Situation	Stop Giving Fluid When	Stop Removing Fluid When
Resuscitation	IVC dilated + UO responds + BP normalizes	-
Diuretic therapy	-	Euvolemia achieved; creatinine rising (over-diuresis)
CRRT ultrafiltration	-	Target fluid balance reached; hemodynamic instability
Fluid challenge	No ≥ 10-15% SV response after 250 mL	-
General	CVP rising; pulmonary crackles; SpO₂ dropping; IVC dilating	Hypotension; rising creatinine; UO dropping excessively

QUICK DECISION ALGORITHM

Is the patient HYPOVOLEMIC?
        ↓ YES
   → GIVE fluid (Phase 1 bolus: 500 mL / ≤15 min)
   → Reassess: BP, UO, IVC, SV
   → If responsive: continue cautiously (Phase 2: 250 mL challenges)
   → If euvolemic: STOP; maintain neutral balance (Phase 3)

Is the patient EUVOLEMIC?
        ↓ YES
   → MAINTAIN: fluid in = fluid out (UO + ~500 mL insensible)
   → No further boluses

Is the patient FLUID OVERLOADED?
        ↓ YES
   → RESTRICT all unnecessary IV fluids
   → REMOVE: Furosemide 1 mg/kg IV bolus → escalate stepwise
   → If diuretic-refractory → initiate RRT (CRRT: 20-25 mL/kg/h effluent,
     UF rate titrated gently; avoid aggressive UF)

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<!-- ══════════════════════════════════════════
     COVER PAGE
══════════════════════════════════════════ -->
<div class="cover">
  <div class="badge">Clinical Nephrology Reference</div>
  <h1>Fluid Management<br>in AKI &amp; CKD</h1>
  <h2>A Complete Evidence-Based Guide</h2>
  <div class="divider"></div>
  <div class="subtitle">
    Covering fluid resuscitation, restriction, and removal — with rates, volumes, timing, diuretic escalation, RRT dosing, and clinical decision algorithms. Fully tabulated across all clinical scenarios.
  </div>
  <div class="sources-box">
    <strong>Sources</strong>
    Brenner &amp; Rector's The Kidney &bull; Harrison's Principles of Internal Medicine 22E (2025)<br>
    Comprehensive Clinical Nephrology 7th Ed. &bull; Tintinalli's Emergency Medicine<br>
    Goldman-Cecil Medicine &bull; KDIGO 2026 AKI/AKD Guideline (March 2026)
  </div>
  <div class="date">Prepared June 2026 &nbsp;&bull;&nbsp; Dr. Fahad</div>
</div>

<!-- ══════════════════════════════════════════
     TABLE OF CONTENTS
══════════════════════════════════════════ -->
<div class="toc-page">
  <h2>Table of Contents</h2>

  <div class="toc-section">
    <div class="toc-part">Part 1 — Core Framework</div>
    <div class="toc-item"><span>Pathophysiology of Fluid Dysregulation (AKI vs CKD)</span><span>Table 1</span></div>
    <div class="toc-item"><span>The 4-Phase ROSE Framework</span><span>Phase Cards</span></div>
    <div class="toc-item"><span>Volume Status Assessment</span><span>Table 2</span></div>
  </div>

  <div class="toc-section">
    <div class="toc-part">Part 2 — AKI: When &amp; How to Give Fluids</div>
    <div class="toc-item"><span>Indications for Fluid Administration in AKI</span><span>Table 3</span></div>
    <div class="toc-item"><span>Fluid Type Selection (Balanced vs Saline)</span><span>Table 4</span></div>
    <div class="toc-item"><span>Volumes and Rates — How Much, How Fast</span><span>Table 5</span></div>
    <div class="toc-item"><span>Special Resuscitation Scenarios</span><span>Table 6</span></div>
  </div>

  <div class="toc-section">
    <div class="toc-part">Part 3 — AKI: When &amp; How to Restrict / Remove Fluids</div>
    <div class="toc-item"><span>Indications for Fluid Restriction</span><span>Table 7</span></div>
    <div class="toc-item"><span>Diuretic Escalation Pathway (KDIGO 2026)</span><span>Table 8</span></div>
    <div class="toc-item"><span>Drug Evidence Table for AKI Fluid Management</span><span>Table 9</span></div>
    <div class="toc-item"><span>Stop Signs — When to Stop Giving or Removing</span><span>Table 10</span></div>
  </div>

  <div class="toc-section">
    <div class="toc-part">Part 4 — Renal Replacement Therapy (RRT)</div>
    <div class="toc-item"><span>Indications for RRT</span><span>Table 11</span></div>
    <div class="toc-item"><span>RRT Modality Selection</span><span>Table 12</span></div>
    <div class="toc-item"><span>CRRT Dosing &amp; Ultrafiltration Rates</span><span>Table 13</span></div>
    <div class="toc-item"><span>Key RRT Trials</span><span>Table 14</span></div>
  </div>

  <div class="toc-section">
    <div class="toc-part">Part 5 — CKD Fluid Management</div>
    <div class="toc-item"><span>Sodium &amp; Fluid Restriction by CKD Stage</span><span>Table 15</span></div>
    <div class="toc-item"><span>Pharmacological Volume Management in CKD</span><span>Table 16</span></div>
    <div class="toc-item"><span>Goldman-Cecil CKD Clinical Action Plan</span><span>Table 17</span></div>
    <div class="toc-item"><span>Sick Day Rules — Preventing AKI-on-CKD</span><span>Table 18</span></div>
  </div>

  <div class="toc-section">
    <div class="toc-part">Part 6 — Integrated Reference</div>
    <div class="toc-item"><span>Master AKI vs CKD Comparison</span><span>Table 19</span></div>
    <div class="toc-item"><span>Clinical Decision Algorithm</span><span>Algorithm</span></div>
    <div class="toc-item"><span>Scenario Quick-Reference</span><span>Table 20</span></div>
    <div class="toc-item"><span>Key Trials Summary</span><span>Table 21</span></div>
  </div>
</div>

<!-- ══════════════════════════════════════════
     PART 1: CORE FRAMEWORK
══════════════════════════════════════════ -->
<div class="part-header">
  <div class="part-label">Part 1</div>
  <h2>Core Framework</h2>
  <p>Pathophysiology of fluid dysregulation, the 4-phase ROSE model, and volume status assessment</p>
</div>

<!-- Table 1 -->
<div class="section">
  <div class="section-title">Table 1: Pathophysiology of Fluid Dysregulation — AKI vs CKD</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Feature</th><th>AKI</th><th>CKD</th></tr></thead>
      <tbody>
        <tr><td class="bold">Onset</td><td>Acute (hours–days)</td><td>Chronic (months–years)</td></tr>
        <tr><td class="bold">Primary mechanism</td><td>Abrupt GFR loss → cannot excrete Na⁺/H₂O acutely</td><td>Progressive nephron loss → reduced adaptive capacity</td></tr>
        <tr><td class="bold">Fluid overload consequence</td><td>Pulmonary edema, abdominal compartment syndrome, sepsis, death</td><td>Hypertension, systemic/pulmonary edema, accelerated CKD progression, CVD mortality</td></tr>
        <tr><td class="bold">Fluid deficit consequence</td><td>Perpetuates prerenal/ischemic injury</td><td>AKI-on-CKD; worsens residual nephron function</td></tr>
        <tr><td class="bold">Key confound</td><td>Fluid excess dilutes serum creatinine — masks AKI severity</td><td>Muscle loss lowers creatinine; true GFR often worse than measured</td></tr>
        <tr><td class="bold">Compensation capacity</td><td>Absent (sudden loss)</td><td>Progressively lost as GFR declines</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: Brenner &amp; Rector's The Kidney; Comprehensive Clinical Nephrology 7th Ed.</p>
</div>

<!-- 4 Phase Cards -->
<div class="section">
  <div class="section-title">The 4-Phase ROSE Framework of Fluid Therapy</div>
  <div class="callout callout-blue">
    <strong>Core Principle</strong>
    Every AKI patient moves through four sequential phases. The most common clinical error is remaining in Phase 1 (resuscitation) too long, producing harmful fluid overload. Actively progress to stabilization and de-escalation.
  </div>
  <div class="phase-grid">
    <div class="phase-card phase-1">
      <div class="phase-num">Phase 1</div>
      <div class="phase-name">Rescue</div>
      <div class="phase-detail">
        <strong>Goal:</strong> Immediate correction of life-threatening hypoperfusion<br>
        <strong>Action:</strong> Aggressive IV fluid boluses<br>
        <strong>Duration:</strong> Minutes to hours<br>
        <strong>Endpoint:</strong> BP/perfusion restored
      </div>
    </div>
    <div class="phase-card phase-2">
      <div class="phase-num">Phase 2</div>
      <div class="phase-name">Optimization</div>
      <div class="phase-detail">
        <strong>Goal:</strong> Fine-tune perfusion; test fluid responsiveness<br>
        <strong>Action:</strong> Cautious fluid challenges (250 mL + SV monitoring)<br>
        <strong>Duration:</strong> Hours<br>
        <strong>Endpoint:</strong> Fluid responsiveness confirmed or excluded
      </div>
    </div>
    <div class="phase-card phase-3">
      <div class="phase-num">Phase 3</div>
      <div class="phase-name">Stabilization</div>
      <div class="phase-detail">
        <strong>Goal:</strong> Neutral or mildly negative fluid balance<br>
        <strong>Action:</strong> Minimize intake; match output; allow spontaneous diuresis<br>
        <strong>Duration:</strong> Days 1–3<br>
        <strong>Endpoint:</strong> Stable, euvolemic, no overload
      </div>
    </div>
    <div class="phase-card phase-4">
      <div class="phase-num">Phase 4</div>
      <div class="phase-name">De-escalation</div>
      <div class="phase-detail">
        <strong>Goal:</strong> Mobilize excess fluid; achieve euvolemia<br>
        <strong>Action:</strong> Restrict fluids + diuretics or ultrafiltration<br>
        <strong>Duration:</strong> Day 3 onward<br>
        <strong>Endpoint:</strong> Target dry weight achieved
      </div>
    </div>
  </div>
  <p class="text-muted">Source: Comprehensive Clinical Nephrology 7th Ed., p. 1002</p>
</div>

<!-- Table 2 -->
<div class="section">
  <div class="section-title">Table 2: Volume Status Assessment</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Method</th><th>Finding</th><th>Interpretation</th></tr></thead>
      <tbody>
        <tr><td class="bold">IVC diameter (ultrasound)</td><td>&gt;2.1 cm, &lt;50% inspiratory collapse</td><td class="red">Volume overload / elevated CVP</td></tr>
        <tr><td class="bold">IVC diameter (ultrasound)</td><td>&lt;2.1 cm, &gt;50% collapse</td><td class="green">Hypovolemia / prerenal AKI</td></tr>
        <tr><td class="bold">Urine sodium (UNa)</td><td>&lt;20 mEq/L</td><td>Prerenal / functional state</td></tr>
        <tr><td class="bold">Urine sodium (UNa)</td><td>&gt;40 mEq/L</td><td>Intrinsic ATN (tubular damage)</td></tr>
        <tr><td class="bold">FENa</td><td>&lt;1%</td><td>Prerenal (unreliable if on diuretics)</td></tr>
        <tr><td class="bold">FEUrea</td><td>&lt;35%</td><td>Prerenal — more reliable on diuretics</td></tr>
        <tr><td class="bold">Daily weight</td><td>Rising (&gt;0.5 kg/day)</td><td>Positive fluid balance / accumulating overload</td></tr>
        <tr><td class="bold">Urine output</td><td>&lt;0.5 mL/kg/h for &gt;6 hours</td><td>Oliguria — fulfills AKI criteria</td></tr>
        <tr><td class="bold">Bladder pressure</td><td>&gt;12 mmHg</td><td>Intraabdominal hypertension (IAH)</td></tr>
        <tr><td class="bold">Bladder pressure</td><td>&gt;20 mmHg + organ dysfunction</td><td class="red">Abdominal compartment syndrome (ACS)</td></tr>
        <tr><td class="bold">Passive leg raise (PLR)</td><td>≥10–15% rise in stroke volume</td><td>Fluid responsive — benefit from further volume</td></tr>
        <tr><td class="bold">Central venous pressure (CVP)</td><td>Elevated within 24h of ICU admission</td><td>Associated with venous congestion and AKI development</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: Tintinalli's Emergency Medicine, p. 610; Brenner &amp; Rector's, p. 2814; Comprehensive Clinical Nephrology 7th Ed., p. 1002</p>
</div>

<!-- ══════════════════════════════════════════
     PART 2: WHEN & HOW TO GIVE FLUIDS
══════════════════════════════════════════ -->
<div class="part-header">
  <div class="part-label">Part 2</div>
  <h2>AKI: When &amp; How to Give Fluids</h2>
  <p>Indications, fluid type selection, volumes, rates, and special resuscitation scenarios</p>
</div>

<!-- Table 3 -->
<div class="section">
  <div class="section-title">Table 3: Indications for Fluid Administration in AKI</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Clinical Scenario</th><th>Give Fluid?</th><th>Rationale</th></tr></thead>
      <tbody>
        <tr class="green-row"><td>Hypotension + tachycardia + collapsed IVC</td><td class="green">YES — urgently</td><td>Prerenal AKI from hypovolemia</td></tr>
        <tr class="green-row"><td>Rising creatinine + UNa &lt;20 + FENa &lt;1%</td><td class="green">YES</td><td>Prerenal — needs volume to restore GFR</td></tr>
        <tr class="green-row"><td>Rhabdomyolysis (any stage)</td><td class="green">YES — aggressively</td><td>Flush myoglobin; prevent cast nephropathy</td></tr>
        <tr class="green-row"><td>Sepsis with hypoperfusion (early)</td><td class="green">YES</td><td>Restore MAP and organ perfusion before overload develops</td></tr>
        <tr class="green-row"><td>Pre-contrast procedure (eGFR &lt;45)</td><td class="green">YES — prophylactically</td><td>Prevent contrast-associated AKI</td></tr>
        <tr class="green-row"><td>Post-obstructive diuresis after catheterization</td><td class="green">YES — partial replacement</td><td>Tubular dysfunction causes ongoing losses; replace ~2/3 of UO</td></tr>
        <tr class="green-row"><td>Elective major abdominal surgery</td><td class="green">YES — liberal strategy</td><td>KDIGO 2026 Grade 1B: target +1–2 kg at 24h; restrictive increases RRT risk 3.24×</td></tr>
        <tr class="danger-row"><td>Dilated IVC + peripheral edema + overload</td><td class="red">NO</td><td>Adding fluid worsens outcomes; triggers ACS, sepsis risk</td></tr>
        <tr class="danger-row"><td>Established intrinsic AKI (ATN) without deficit</td><td class="red">NO</td><td>Volume will not restore tubular function; causes overload</td></tr>
        <tr class="danger-row"><td>Oliguric AKI + rising CVP + pulmonary edema</td><td class="red">NO</td><td>Active fluid overload — needs removal, not addition</td></tr>
        <tr class="danger-row"><td>AKI with IAP &gt;12 mmHg</td><td class="red">NO</td><td>Further fluid worsens intraabdominal hypertension</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- Table 4 -->
<div class="section">
  <div class="section-title">Table 4: Fluid Type Selection — Balanced Crystalloids vs Normal Saline</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Fluid</th><th>Cl⁻ (mmol/L)</th><th>Recommendation</th><th>Evidence</th><th>KDIGO 2026 Grade</th></tr></thead>
      <tbody>
        <tr class="green-row"><td class="bold">Balanced crystalloids (Plasma-Lyte, Lactated Ringer's)</td><td>98–109</td><td class="green">PREFERRED</td><td>Sequential study: AKI rate 14% → 8.4% (P&lt;0.001); SMART/SALT-ED trials: lower composite kidney outcomes</td><td class="bold">1B — Recommended</td></tr>
        <tr><td class="bold">0.9% Normal saline</td><td>154</td><td>Use only for specific indications (TBI, hyponatremia)</td><td>SPLIT trial: no AKI difference in ICU; hyperchloremic acidosis risk; may trigger earlier RRT</td><td>Conditional against</td></tr>
        <tr><td class="bold">Colloids (albumin, gelatin, starches)</td><td>—</td><td class="red">NOT recommended as initial therapy</td><td>No benefit over crystalloids for AKI prevention or treatment</td><td class="bold">1B — Against colloids</td></tr>
        <tr><td class="bold">IV bicarbonate (NaHCO₃ in 0.45% saline)</td><td>—</td><td>Rhabdomyolysis only</td><td>Alkalinizes urine, prevents cast formation; risk of worsening hypocalcemia</td><td>Conditional</td></tr>
        <tr><td class="bold">Oral rehydration therapy</td><td>—</td><td>First line in mild-moderate dehydration without IV access</td><td>WHO recommends as first-line for community settings (KDIGO 2026 Practice Point)</td><td>Practice Point</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- Table 5 -->
<div class="section">
  <div class="section-title">Table 5: Volumes and Rates — How Much Fluid, How Fast</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Scenario</th><th>Fluid</th><th>Volume</th><th>Rate / Duration</th><th>Target / Endpoint</th></tr></thead>
      <tbody>
        <tr class="highlight-row"><td>Fluid bolus (Phase 1 — Rescue)</td><td>Balanced crystalloid</td><td>500 mL</td><td>Over ≤15 minutes</td><td>Restore BP and tissue perfusion</td></tr>
        <tr><td>Fluid challenge (Phase 2 — Optimization)</td><td>Balanced crystalloid</td><td>250 mL or 3 mL/kg</td><td>Over 5–10 minutes</td><td>≥10–15% rise in stroke volume or CO</td></tr>
        <tr><td>General resuscitation (shock)</td><td>Balanced crystalloid</td><td>10–20 mL/kg</td><td>Over minutes to hours</td><td>Vital signs improvement</td></tr>
        <tr class="highlight-row"><td>Rhabdomyolysis</td><td>Balanced crystalloid or 0.9% saline</td><td>Up to 10 L/day (early phase)</td><td>High-rate continuous infusion</td><td>Urine output 200–300 mL/h</td></tr>
        <tr><td>Contrast-AKI prophylaxis (elective)</td><td>Isotonic saline or 1.26% NaHCO₃</td><td>1–1.5 mL/kg/h</td><td>Start 1h pre-procedure; continue 4–6h post</td><td>Urinary flow &gt;150 mL/h</td></tr>
        <tr><td>Contrast-AKI prophylaxis (emergency/rapid)</td><td>1.26% isotonic NaHCO₃</td><td>3 mL/kg pre-procedure</td><td>Over 60 minutes, then 1 mL/kg/h for 6h post</td><td>Adequate pre-hydration achieved</td></tr>
        <tr><td>Elective major abdominal surgery (KDIGO 2026)</td><td>Balanced crystalloid</td><td>Target +1 to +2 kg at 24h post-op</td><td>Perioperative liberal strategy</td><td>Grade 1B; avoid net-zero (3.24× RRT risk)</td></tr>
        <tr class="highlight-row"><td>Euvolemic AKI maintenance</td><td>Balanced crystalloid or oral</td><td>= Urine output + ~500–800 mL insensible losses/day</td><td>Continuous low rate</td><td>Neutral fluid balance (Phase 3)</td></tr>
        <tr><td>Hepatorenal syndrome</td><td>20–25% albumin</td><td>25–50 g IV (max 100 g/day)</td><td>IV infusion + vasoconstrictors</td><td>Hemodynamic stabilization</td></tr>
        <tr><td>Sepsis-AKI (early resuscitation)</td><td>Balanced crystalloid</td><td>30 mL/kg within first 3h (Surviving Sepsis)</td><td>Rapid boluses; reassess frequently</td><td>MAP ≥65 mmHg; UO &gt;0.5 mL/kg/h</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: KDIGO 2026; Comprehensive Clinical Nephrology 7th Ed.; Harrison's 22E; Tintinalli's EM</p>
</div>

<!-- Table 6 -->
<div class="section">
  <div class="section-title">Table 6: Special Resuscitation Scenarios</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Condition</th><th>Fluid Strategy</th><th>Volume / Rate</th><th>Key Notes</th></tr></thead>
      <tbody>
        <tr><td class="bold">Prerenal AKI</td><td>Prompt isotonic crystalloid</td><td>500 mL boluses q15 min; reassess after each</td><td>Avoid K⁺-containing fluids until UO established and K⁺ status known</td></tr>
        <tr><td class="bold">Rhabdomyolysis</td><td>Aggressive early repletion ± alkaline fluids</td><td>Up to 10 L/day; target UO 200–300 mL/h</td><td>Alkaline fluids (75 mmol/L NaHCO₃ in 0.45% saline) prevent cast formation but risk hypocalcemia</td></tr>
        <tr><td class="bold">Post-obstructive diuresis</td><td>Partial replacement only</td><td>Replace ~2/3 of hourly urine output</td><td>Full replacement perpetuates diuresis; risk hyponatremia</td></tr>
        <tr><td class="bold">Contrast-AKI (eGFR &lt;45)</td><td>IV isotonic saline before + after contrast</td><td>1–1.5 mL/kg/h; start pre, continue 4–6h post</td><td>Only proven prophylactic measure (Grade 1B); no role for acetylcysteine or preventive dialysis</td></tr>
        <tr><td class="bold">Hepatorenal syndrome</td><td>IV albumin + terlipressin/midodrine + octreotide</td><td>Albumin 25–50 g/day IV (max 100 g/day)</td><td>Vasoconstrictors are essential alongside volume; terlipressin preferred where available</td></tr>
        <tr><td class="bold">Surgical AKI (elective major abdominal)</td><td>Liberal perioperative strategy</td><td>+1–2 kg at 24h post-op</td><td>KDIGO 2026 Grade 1B: restrictive = 3.24× RRT risk; 7 excess RRT events per 1,000 patients</td></tr>
        <tr><td class="bold">Septic AKI</td><td>Early resuscitation → conservative after stabilization</td><td>30 mL/kg in first 3h; then guided by hemodynamic response</td><td>Avoid prolonged positive balance; use vasopressors for MAP &lt;65 mmHg despite fluids</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- ══════════════════════════════════════════
     PART 3: RESTRICT & REMOVE
══════════════════════════════════════════ -->
<div class="part-header">
  <div class="part-label">Part 3</div>
  <h2>AKI: When &amp; How to Restrict / Remove Fluids</h2>
  <p>Indications for restriction, diuretic escalation, drug evidence, and stop signs</p>
</div>

<!-- Table 7 -->
<div class="section">
  <div class="section-title">Table 7: Indications for Fluid Restriction in AKI</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Clinical Scenario</th><th>Action</th><th>Threshold / Sign</th></tr></thead>
      <tbody>
        <tr class="danger-row"><td>Oliguric AKI with volume overload</td><td>Restrict fluids + sodium; start diuretics</td><td>UO &lt;0.5 mL/kg/h + rising weight + dilated IVC</td></tr>
        <tr class="danger-row"><td>Pulmonary edema in AKI</td><td>Strict restriction + IV furosemide ± nitrates ± NIPPV</td><td>Respiratory distress, bilateral crackles, SpO₂ falling</td></tr>
        <tr class="danger-row"><td>Anuria in AKI</td><td>Restrict to insensible losses only (~500 mL/day)</td><td>No urine output; risk of rapid fluid accumulation</td></tr>
        <tr><td>Established intrinsic AKI (ATN)</td><td>No resuscitation fluids unless volume deficit proven</td><td>Volume cannot restore tubular function; adds to overload</td></tr>
        <tr class="danger-row"><td>IAP &gt;12 mmHg (intraabdominal hypertension)</td><td>Stop further fluid administration immediately</td><td>Fluid overload driving abdominal compartment syndrome</td></tr>
        <tr><td>Post-operative period after initial resuscitation</td><td>Transition to neutral balance (Phase 3)</td><td>Hemodynamically stable + adequate UO + euvolemia</td></tr>
        <tr><td>Fluid non-responsive patient (PLR negative)</td><td>Do not give further boluses</td><td>&lt;10% rise in SV after 250 mL challenge</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- Table 8 -->
<div class="section">
  <div class="section-title">Table 8: Diuretic Escalation Pathway for Fluid Removal in AKI (KDIGO 2026)</div>
  <div class="callout callout-blue">
    <strong>Principle</strong>
    Use intermittent IV boluses as the initial strategy (not continuous infusion). Monitor response at each step. Escalate promptly. Do not delay RRT when diuretics fail.
  </div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Step</th><th>Dose / Administration</th><th>Goal</th><th>If Fails → Action</th></tr></thead>
      <tbody>
        <tr class="green-row"><td class="bold">Step 1</td><td>Furosemide 1.0 mg/kg IV bolus (naive patient)<br>OR 1.5 mg/kg IV (prior furosemide use)</td><td>Urine output &gt;200 mL within 2 hours</td><td>Escalate to Step 2</td></tr>
        <tr><td class="bold">Step 2</td><td>Double dose: 160–200 mg IV bolus every 6–12 hours</td><td>Adequate diuresis + progressive fluid removal</td><td>Escalate to Step 3</td></tr>
        <tr><td class="bold">Step 3</td><td>Add thiazide: metolazone 2.5–10 mg PO 30 min before furosemide dose</td><td>Synergistic natriuresis (DCT + loop dual blockade)</td><td>Escalate to RRT</td></tr>
        <tr><td class="bold">Continuous infusion option</td><td>IV bolus first → then furosemide 10–40 mg/h drip</td><td>Sustained diuresis; reduced ototoxicity vs repeat boluses</td><td>If no response → RRT</td></tr>
        <tr class="danger-row"><td class="bold">Escalate to RRT</td><td>When all diuretic steps fail</td><td>Diuretic-refractory volume overload</td><td>Initiate CRRT or IHD promptly</td></tr>
      </tbody>
    </table>
  </div>
  <div class="callout callout-orange">
    <strong>Furosemide Stress Test (FST) — Predicting AKI Progression</strong>
    Administer furosemide 1 mg/kg IV (naive) or 1.5 mg/kg (prior exposure). Urine output &lt;200 mL over 2 hours predicts progression to AKIN Stage 3 with sensitivity 87.1% and specificity 84.1%. Use in AKI Stage ≤2 to guide escalation decisions.
  </div>
  <div class="callout callout-red">
    <strong>Avoid</strong>
    Do NOT co-prescribe diuretics with aminoglycosides (markedly increased ototoxicity risk). Do NOT use diuretics to prevent AKI, convert oliguric to non-oliguric AKI as a therapeutic target, or delay RRT when other urgent indications exist.
  </div>
  <p class="text-muted">Source: KDIGO 2026 Table 22; Tintinalli's EM, p. 610; Comprehensive Clinical Nephrology 7th Ed., p. 3424</p>
</div>

<!-- Table 9 -->
<div class="section">
  <div class="section-title">Table 9: Drug Evidence for AKI Fluid and Hemodynamic Management</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Agent</th><th>Evidence Level</th><th>Verdict</th><th>Clinical Notes</th></tr></thead>
      <tbody>
        <tr class="green-row"><td class="bold">Loop diuretics (furosemide)</td><td>Multiple RCTs + meta-analyses</td><td class="green">Use for volume overload only</td><td>No mortality benefit; no improvement in kidney recovery</td></tr>
        <tr class="green-row"><td class="bold">Thiazide diuretics (metolazone)</td><td>Clinical experience</td><td class="green">Useful for diuretic resistance</td><td>Synergistic with loops; metolazone retains efficacy at GFR &lt;30</td></tr>
        <tr class="danger-row"><td class="bold">Low-dose dopamine</td><td>Multiple RCTs</td><td class="red">DO NOT USE</td><td>No benefit in intrinsic AKI; arrhythmia + bowel ischemia risk outweigh any benefit</td></tr>
        <tr class="danger-row"><td class="bold">Atrial natriuretic peptide (ANP)</td><td>4 RCTs (conflicting)</td><td class="red">Not recommended (KDIGO)</td><td>Initial promising data; larger trials failed to confirm; guideline does not support</td></tr>
        <tr class="danger-row"><td class="bold">Nesiritide (B-type NP)</td><td>Large RCT</td><td class="red">Not recommended</td><td>No mortality benefit; increases hypotension risk</td></tr>
        <tr class="danger-row"><td class="bold">Mannitol</td><td>Expert consensus</td><td class="red">No role in established AKI</td><td>Contraindicated; osmotic overload risk</td></tr>
        <tr><td class="bold">Norepinephrine</td><td>Prospective observational</td><td class="blue">Useful in septic AKI</td><td>Raise MAP &gt;65–70 mmHg; may improve creatinine clearance; further RCTs needed</td></tr>
        <tr><td class="bold">Fenoldopam</td><td>Small RCTs + 1 meta-analysis</td><td>Uncertain</td><td>Conflicting data; further studies required</td></tr>
        <tr class="green-row"><td class="bold">Balanced crystalloids</td><td>SMART, SALT-ED RCTs</td><td class="green">Preferred over 0.9% saline</td><td>Lower AKI and RRT vs normal saline in non-ICU; SPLIT trial showed no difference in ICU</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- Table 10 -->
<div class="section">
  <div class="section-title">Table 10: Stop Signs — When to Stop Giving or Removing Fluids</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Situation</th><th>Stop Giving Fluid When</th><th>Stop Removing Fluid When</th></tr></thead>
      <tbody>
        <tr><td>Fluid resuscitation</td><td>IVC dilating; crackles appearing; SpO₂ dropping; CVP rising</td><td>—</td></tr>
        <tr><td>Fluid challenge (optimization)</td><td>No ≥10–15% SV response after 250 mL bolus</td><td>—</td></tr>
        <tr><td>Diuretic therapy</td><td>—</td><td>Euvolemia achieved; creatinine rising; UO dropping excessively</td></tr>
        <tr><td>CRRT ultrafiltration</td><td>—</td><td>Target fluid balance reached; hemodynamic instability; MAP falling</td></tr>
        <tr><td>Rhabdomyolysis resuscitation</td><td>UO 200–300 mL/h sustained for 24h; CK trending down</td><td>—</td></tr>
        <tr><td>General escalation rule</td><td>Any sign of pulmonary overload: dyspnea, ↑ CVP, ↓ SpO₂, worsening edema</td><td>Hypotension developing; excessive weight loss (&gt;1–1.5 kg/session)</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- ══════════════════════════════════════════
     PART 4: RRT
══════════════════════════════════════════ -->
<div class="part-header">
  <div class="part-label">Part 4</div>
  <h2>Renal Replacement Therapy (RRT)</h2>
  <p>Indications, modality selection, dosing, ultrafiltration rates, and key trials</p>
</div>

<!-- Table 11 -->
<div class="section">
  <div class="section-title">Table 11: Indications for RRT in AKI</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Indication</th><th>Threshold / Clinical Detail</th><th>Priority</th></tr></thead>
      <tbody>
        <tr class="danger-row"><td class="bold">Volume overload</td><td>Refractory to diuretics (failed furosemide escalation); pulmonary edema threatening airway</td><td class="red">Urgent</td></tr>
        <tr class="danger-row"><td class="bold">Metabolic acidosis</td><td>pH ≤7.1 with anuria OR unable to tolerate bicarbonate fluid load</td><td class="red">Urgent</td></tr>
        <tr class="danger-row"><td class="bold">Hyperkalemia</td><td>With ECG changes: peaked T waves, widened QRS, PR prolongation, sine wave pattern</td><td class="red">Emergent</td></tr>
        <tr><td class="bold">Uremic encephalopathy</td><td>Altered consciousness, asterixis, seizures attributable to uremia</td><td class="blue">Urgent</td></tr>
        <tr><td class="bold">Uremic pericarditis</td><td>Friction rub; pericardial effusion on echo in context of AKI/uremia</td><td class="blue">Urgent</td></tr>
        <tr><td class="bold">Uremic bleeding</td><td>Platelet dysfunction from uremic toxins; unresponsive to desmopressin/dialysate</td><td class="blue">Urgent</td></tr>
        <tr><td class="bold">Severe rhabdomyolysis</td><td>When aggressive fluid therapy and supportive care are inadequate</td><td>Indicated</td></tr>
        <tr><td class="bold">Severe rhabdomyolysis (in sepsis)</td><td>Up to 20% of patients with rhabdomyolysis-AKI require RRT</td><td>Indicated</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: Harrison's 22E; Tintinalli's EM; Brenner &amp; Rector's; KDIGO 2026</p>
</div>

<!-- Table 12 -->
<div class="section">
  <div class="section-title">Table 12: RRT Modality Selection</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Modality</th><th>Full Name</th><th>Best Setting</th><th>Fluid Removal</th><th>Clearance Mode</th></tr></thead>
      <tbody>
        <tr><td class="bold">IHD</td><td>Intermittent Hemodialysis</td><td>Hemodynamically stable</td><td>Rapid (2–4h sessions)</td><td>Diffusive — best for small solutes</td></tr>
        <tr><td class="bold">CRRT — CVVH</td><td>Continuous Venovenous Hemofiltration</td><td>Hemodynamic instability</td><td>Slow, continuous</td><td>Convective — larger molecule clearance</td></tr>
        <tr><td class="bold">CRRT — CVVHD</td><td>Continuous Venovenous Hemodialysis</td><td>Hemodynamic instability</td><td>Slow, continuous</td><td>Diffusive</td></tr>
        <tr><td class="bold">CRRT — CVVHDF</td><td>Continuous Venovenous Hemodiafiltration</td><td>Hemodynamic instability</td><td>Slow, continuous</td><td>Combined diffusive + convective</td></tr>
        <tr><td class="bold">SLED</td><td>Sustained Low-Efficiency Dialysis</td><td>Intermediate instability</td><td>Moderate (8–12h sessions)</td><td>Diffusive; comparable to CRRT</td></tr>
        <tr><td class="bold">PD</td><td>Peritoneal Dialysis</td><td>Where CRRT/IHD unavailable; selected children</td><td>Slow, continuous</td><td>Diffusive across peritoneal membrane</td></tr>
      </tbody>
    </table>
  </div>
  <div class="callout callout-blue">
    <strong>SLED vs CRRT</strong>
    A RCT of 232 surgical ICU patients showed no mortality difference between SLED and CRRT (49.6% vs 55.6%, P=0.43). SLED is a safe, cost-effective alternative for hemodynamically intermediate patients.
  </div>
</div>

<!-- Table 13 -->
<div class="section">
  <div class="section-title">Table 13: CRRT Dosing and Ultrafiltration Rates (KDIGO 2026)</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Parameter</th><th>Adults</th><th>Children</th><th>Grade</th></tr></thead>
      <tbody>
        <tr class="highlight-row"><td class="bold">CRRT effluent dose (solute clearance)</td><td><strong>20–25 mL/kg/h</strong></td><td>25–30 mL/kg/h initial; adjust by metabolic response</td><td class="bold">1B (KDIGO 2026)</td></tr>
        <tr><td class="bold">Net ultrafiltration (UF) rate</td><td>Titrate carefully to euvolemia; no defined upper limit but aggressive UF = harm</td><td><strong>≤2.5 mL/kg/h</strong> (KDIGO 2026)</td><td>Practice Point</td></tr>
        <tr><td class="bold">Fluid balance reassessment</td><td>Every 4–6 hours</td><td>Every 4–6 hours</td><td>Practice Point</td></tr>
        <tr><td class="bold">High-volume hemofiltration (HVHF)</td><td class="red">DO NOT USE — no benefit; increases risk</td><td>Not recommended</td><td class="bold">1B — Against (KDIGO 2026)</td></tr>
        <tr><td class="bold">IHD/SLED Kt/V target</td><td><strong>3.9 per week</strong></td><td>Weight-based; adjust per adequacy markers</td><td class="bold">1B (KDIGO 2026)</td></tr>
        <tr><td class="bold">High BMI (≥30 kg/m²)</td><td>Use ideal or adjusted body weight for CRRT dosing — not actual weight</td><td>—</td><td>Practice Point</td></tr>
      </tbody>
    </table>
  </div>
  <div class="callout callout-red">
    <strong>Critical Warning: Aggressive Ultrafiltration = Harm</strong>
    A 2025 systematic review and meta-analysis (PMID 39889501, Aust Crit Care) confirmed that higher net ultrafiltration rates in CRRT are independently associated with increased mortality. Titrate to euvolemia — not to maximum fluid removal speed.
  </div>
</div>

<!-- Table 14 -->
<div class="section">
  <div class="section-title">Table 14: Key RRT Trials</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Trial</th><th>N</th><th>Comparison</th><th>Key Finding</th><th>Design</th></tr></thead>
      <tbody>
        <tr><td class="bold">ATN Trial</td><td>1,124</td><td>Intensive vs standard RRT dose</td><td>No survival benefit from intensive dosing</td><td>Large RCT</td></tr>
        <tr><td class="bold">RENAL Trial</td><td>Large</td><td>High vs standard CRRT dose</td><td>No difference in 90-day mortality</td><td>Large RCT</td></tr>
        <tr><td class="bold">SLED vs CRRT</td><td>232</td><td>SLED vs CRRT (surgical ICU)</td><td>No mortality difference (49.6% vs 55.6%, P=0.43)</td><td>RCT</td></tr>
        <tr><td class="bold">Net UF meta-analysis 2025</td><td>Multi-study</td><td>Aggressive vs standard UF rate in CRRT</td><td>High UF rate = increased mortality; titrate carefully</td><td>Systematic review (PMID 39889501)</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- ══════════════════════════════════════════
     PART 5: CKD
══════════════════════════════════════════ -->
<div class="part-header">
  <div class="part-label">Part 5</div>
  <h2>CKD Fluid Management</h2>
  <p>Sodium and fluid restriction by stage, pharmacology, Goldman-Cecil action plan, and sick day rules</p>
</div>

<!-- Table 15 -->
<div class="section">
  <div class="section-title">Table 15: Sodium and Fluid Restriction by CKD Stage</div>
  <div class="callout callout-blue">
    <strong>Core CKD Fluid Principle</strong>
    One of the earliest effects of CKD is loss of the kidney's ability to compensate for changes in sodium and water intake. Sodium and water retention are major contributors to hypertension, and in advanced CKD, drive edema, pulmonary congestion, and cardiovascular mortality.
  </div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Stage</th><th>GFR (mL/min/1.73 m²)</th><th>Sodium Target</th><th>Fluid Advice</th><th>Additional Restrictions</th></tr></thead>
      <tbody>
        <tr><td class="bold">G1</td><td>≥90</td><td>&lt;90 mmol/day (5 g NaCl)</td><td>Individualized</td><td>Treat comorbidities; evaluate reversible CKD risk factors</td></tr>
        <tr><td class="bold">G2</td><td>60–89</td><td>&lt;90 mmol/day</td><td>Individualized</td><td>Start lifestyle, BP control, CVD risk reduction</td></tr>
        <tr><td class="bold">G3a</td><td>45–59</td><td>&lt;90 mmol/day</td><td>Monitor for overload</td><td>BP + glycemic + lipid control; drug dose adjustments</td></tr>
        <tr><td class="bold">G3b</td><td>30–44</td><td>&lt;90 mmol/day</td><td>Close monitoring; weigh daily</td><td>Add phosphate awareness; protein 0.8–1.0 g/kg/day</td></tr>
        <tr><td class="bold">G4</td><td>15–29</td><td>&lt;90 mmol/day</td><td>Strict; daily weights essential</td><td>Restrict K⁺ + PO₄; protein 0.8 g/kg/day; RRT planning</td></tr>
        <tr><td class="bold">G5</td><td>&lt;15</td><td>&lt;90 mmol/day</td><td>Strict; often RRT-dependent for fluid control</td><td>Full uremic complication management</td></tr>
        <tr class="danger-row"><td class="bold" colspan="2">Salt substitutes — ALL STAGES</td><td colspan="3" class="red">CONTRAINDICATED — Most contain KCl → life-threatening hyperkalemia risk</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: Comprehensive Clinical Nephrology 7th Ed., p. 3805; Goldman-Cecil Medicine Table 116-3</p>
</div>

<!-- Table 16 -->
<div class="section">
  <div class="section-title">Table 16: Pharmacological Volume Management in CKD</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Drug Class</th><th>Examples</th><th>Mechanism</th><th>Role in CKD</th><th>Key Considerations</th></tr></thead>
      <tbody>
        <tr class="green-row"><td class="bold">Loop diuretics</td><td>Furosemide, torsemide, bumetanide</td><td>Block NKCC2 (thick ascending limb)</td><td>Mainstay of volume control</td><td>Resistance common; higher doses needed in CKD; torsemide better oral bioavailability</td></tr>
        <tr><td class="bold">Thiazides</td><td>Metolazone, HCTZ</td><td>Block NCC (distal convoluted tubule)</td><td>Overcome loop diuretic resistance</td><td>Metolazone retains efficacy at GFR &lt;30; HCTZ less effective below GFR 30</td></tr>
        <tr class="green-row"><td class="bold">ACE inhibitors</td><td>Ramipril, enalapril, lisinopril</td><td>RAAS blockade → natriuresis + antiproteinuric</td><td>First-line for proteinuric CKD; slows progression</td><td>Hold during sick days; monitor K⁺ + creatinine; may cause acute GFR dip</td></tr>
        <tr class="green-row"><td class="bold">ARBs</td><td>Losartan, candesartan, valsartan</td><td>AT1 receptor blockade</td><td>Alternative or additive to ACEi</td><td>Same monitoring as ACEi; preferred if ACEi causes cough</td></tr>
        <tr class="green-row"><td class="bold">SGLT2 inhibitors</td><td>Dapagliflozin, empagliflozin</td><td>Block Na⁺-glucose cotransport in PCT → natriuresis</td><td>Kidney + cardioprotective in diabetic AND non-diabetic CKD</td><td>Initial eGFR dip (hemodynamic); beneficial long-term; do not use in eGFR &lt;20</td></tr>
        <tr class="green-row"><td class="bold">Finerenone (nonsteroidal MRA)</td><td>Finerenone</td><td>Mineralocorticoid receptor blockade</td><td>Cardiorenal benefit in CKD + T2DM</td><td>Less hyperkalemia than spironolactone; monitor K⁺ closely</td></tr>
        <tr><td class="bold">Albumin infusions</td><td>20–25% albumin</td><td>Expand oncotic pressure</td><td>Refractory edema or acute GFR decline in nephrotic CKD</td><td>Goldman-Cecil: use "as necessary for refractory edema or acute GFR decline"</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: Comprehensive Clinical Nephrology 7th Ed., pp. 3794–3796; Goldman-Cecil Medicine Table 116-2</p>
</div>

<!-- Table 17 -->
<div class="section">
  <div class="section-title">Table 17: Goldman-Cecil CKD Clinical Action Plan — Fluid-Relevant Elements</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>CKD Stage</th><th>GFR</th><th>Key Fluid / Volume Actions</th></tr></thead>
      <tbody>
        <tr><td class="bold">G1–G2 (A2–A3)</td><td>≥60</td><td>ACEi/ARBs + SGLT2i + MRA + GLP1 agonists in diabetes; albumin for refractory edema; statins; anticoagulants if nephrotic syndrome</td></tr>
        <tr><td class="bold">G3a–G3b</td><td>30–59</td><td>Treat comorbidities; BP + glycemic + lipid control; begin drug dose adjustments; monitor electrolytes; start phosphate monitoring</td></tr>
        <tr><td class="bold">G4</td><td>15–29</td><td>Restrict dietary protein to 0.8 g/kg/day; phosphate restriction; intensify CVD risk management; RRT planning begins</td></tr>
        <tr><td class="bold">G5</td><td>&lt;15</td><td>Full uremic complication management; dialysis initiation guided by symptoms + eGFR trends</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: Goldman-Cecil Medicine International Edition, Tables 116-2 and 116-3</p>
</div>

<!-- Table 18 -->
<div class="section">
  <div class="section-title">Table 18: Sick Day Rules — Preventing AKI-on-CKD (KDIGO)</div>
  <div class="callout callout-orange">
    <strong>When to Apply</strong>
    Temporarily stop the following drugs in CKD patients with GFR &lt;60 mL/min/1.73 m² during any serious acute illness (infection, dehydration, surgery, vomiting/diarrhea). Restart once the patient has recovered and is drinking normally.
  </div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Drug Class</th><th>Examples</th><th>Action</th><th>Reason</th></tr></thead>
      <tbody>
        <tr class="danger-row"><td class="bold">ACE inhibitors</td><td>Ramipril, lisinopril, enalapril</td><td class="red">Temporarily STOP</td><td>AKI risk + hyperkalemia during hypovolemia</td></tr>
        <tr class="danger-row"><td class="bold">ARBs</td><td>Losartan, valsartan, candesartan</td><td class="red">Temporarily STOP</td><td>AKI risk + hyperkalemia</td></tr>
        <tr class="danger-row"><td class="bold">Aldosterone inhibitors</td><td>Spironolactone, eplerenone</td><td class="red">Temporarily STOP</td><td>Hyperkalemia risk</td></tr>
        <tr class="danger-row"><td class="bold">Direct renin inhibitors</td><td>Aliskiren</td><td class="red">Temporarily STOP</td><td>AKI + hyperkalemia</td></tr>
        <tr class="danger-row"><td class="bold">Diuretics</td><td>Furosemide, metolazone, HCTZ</td><td class="red">Temporarily STOP</td><td>Dehydration → worsens AKI</td></tr>
        <tr class="danger-row"><td class="bold">NSAIDs</td><td>Ibuprofen, naproxen, indomethacin</td><td class="red">Temporarily STOP</td><td>Renal vasoconstriction → acute prerenal AKI</td></tr>
        <tr class="danger-row"><td class="bold">Metformin</td><td>Metformin</td><td class="red">Temporarily STOP</td><td>Lactic acidosis risk at low GFR</td></tr>
        <tr class="danger-row"><td class="bold">Lithium</td><td>Lithium carbonate</td><td class="red">Temporarily STOP</td><td>Narrow therapeutic index; toxic accumulation</td></tr>
        <tr class="danger-row"><td class="bold">Digoxin</td><td>Digoxin</td><td class="red">Temporarily STOP</td><td>Narrow therapeutic index; accumulates in AKI</td></tr>
      </tbody>
    </table>
  </div>
  <p class="text-muted">Source: Comprehensive Clinical Nephrology 7th Ed., p. 3791 (KDIGO recommendation)</p>
</div>

<!-- ══════════════════════════════════════════
     PART 6: INTEGRATED REFERENCE
══════════════════════════════════════════ -->
<div class="part-header">
  <div class="part-label">Part 6</div>
  <h2>Integrated Reference</h2>
  <p>Master comparison, clinical decision algorithm, quick-reference scenarios, and key trials</p>
</div>

<!-- Table 19 -->
<div class="section">
  <div class="section-title">Table 19: Master Comparison — AKI vs CKD</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Parameter</th><th>AKI</th><th>CKD</th></tr></thead>
      <tbody>
        <tr><td class="bold">Primary fluid goal</td><td>Euvolemia — avoid both overload AND under-resuscitation</td><td>Prevent chronic volume overload; slow CKD progression</td></tr>
        <tr><td class="bold">Resuscitation fluid</td><td>Balanced crystalloids over 0.9% saline (KDIGO 2026, Grade 1B)</td><td>Not applicable (chronic management)</td></tr>
        <tr><td class="bold">Sodium restriction</td><td>Yes, in oliguric/hypervolemic AKI</td><td>&lt;90 mmol/day (5 g NaCl) at all stages</td></tr>
        <tr><td class="bold">Fluid restriction</td><td>Oliguric/volume-overloaded AKI</td><td>Individualized per CKD stage; guided by edema and BP</td></tr>
        <tr><td class="bold">Diuretics — initial route</td><td>IV bolus (intermittent, preferred over continuous infusion)</td><td>Oral loop diuretic; combination for resistance</td></tr>
        <tr><td class="bold">Diuretics — role</td><td>Volume overload only; NOT to hasten AKI recovery</td><td>Mainstay of chronic volume control; hold during sick days</td></tr>
        <tr><td class="bold">Key pharmacotherapy</td><td>IV furosemide ± thiazide; vasopressors in septic AKI</td><td>Loop + ACEi/ARB + SGLT2i + finerenone</td></tr>
        <tr><td class="bold">RRT trigger</td><td>Diuretic-refractory overload, pH ≤7.1, ECG-K⁺ changes, uremia</td><td>eGFR &lt;10–15 mL/min or symptomatic uremia</td></tr>
        <tr><td class="bold">RRT dose</td><td>Standard (ATN + RENAL trials: intensive = no benefit)</td><td>Standard dialysis prescription; Kt/V ≥1.2–1.4 per session</td></tr>
        <tr><td class="bold">Ultrafiltration</td><td>Titrate carefully; aggressive UF = harm (2025 meta-analysis)</td><td>Titrate to dry weight at each dialysis session</td></tr>
        <tr><td class="bold">Monitoring</td><td>Hourly UO, IVC US, daily weights, creatinine, electrolytes</td><td>Weight, BP, edema, eGFR, K⁺, PO₄, HCO₃ regularly</td></tr>
        <tr><td class="bold">Salt substitutes</td><td>Avoid (oliguria + hyperkalemia)</td><td>Avoid at all stages (KCl content)</td></tr>
        <tr><td class="bold">Avoid</td><td>Dopamine, mannitol, aminoglycosides + diuretics</td><td>NSAIDs, nephrotoxins, sick-day drugs (Table 18)</td></tr>
        <tr><td class="bold">Special concern</td><td>Abdominal compartment syndrome; rhabdomyolysis; contrast AKI</td><td>Sick-day rules; SGLT2i for cardio-renal protection</td></tr>
        <tr class="highlight-row"><td class="bold">2026 Update</td><td>Liberal &gt; restrictive fluid strategy in surgical patients (KDIGO 2026, Grade 1B)</td><td>Finerenone + SGLT2i now central to CKD management</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- Algorithm -->
<div class="section page-break">
  <div class="section-title">Clinical Decision Algorithm</div>
  <div class="algo-box">
    <div class="algo-title">Fluid Management Decision Algorithm — AKI</div>

STEP 1: ASSESS VOLUME STATUS
<span class="algo-arrow">├──</span> IVC diameter + respiratory variation
<span class="algo-arrow">├──</span> Urine sodium, FENa, FEUrea
<span class="algo-arrow">├──</span> Daily weight trend
<span class="algo-arrow">└──</span> Clinical signs (BP, HR, JVP, crackles, edema)

<span class="algo-arrow">▼</span>
<span class="algo-yes">HYPOVOLEMIC?</span> <span class="algo-arrow">──────────────────────────────────────────</span><span class="algo-arrow">►</span> <span class="algo-action">PHASE 1: GIVE FLUID</span>
    <span class="algo-arrow">│</span>                                                  Balanced crystalloid bolus: 500 mL over ≤15 min
    <span class="algo-arrow">│</span>                                                  Reassess BP, UO, IVC, SV after each bolus
    <span class="algo-arrow">│</span>                                                  Continue until perfusion restored
    <span class="algo-arrow">│</span>
    <span class="algo-arrow">│</span> <span class="algo-yes">PHASE 2: TEST RESPONSIVENESS</span>
    <span class="algo-arrow">│</span> Fluid challenge: 250 mL or 3 mL/kg over 5–10 min
    <span class="algo-arrow">│</span> <span class="algo-yes">SV rises ≥10–15%?</span> → Continue cautious challenges
    <span class="algo-arrow">│</span> <span class="algo-no">SV does NOT rise?</span>  → STOP fluids; assess for other causes

<span class="algo-arrow">▼</span>
<span class="algo-yes">EUVOLEMIC?</span> <span class="algo-arrow">────────────────────────────────────────────</span><span class="algo-arrow">►</span> <span class="algo-action">PHASE 3: MAINTAIN BALANCE</span>
    <span class="algo-arrow">│</span>                                                  Fluid in = Urine output + ~500–800 mL insensible
    <span class="algo-arrow">│</span>                                                  Minimize unnecessary IV fluids
    <span class="algo-arrow">│</span>                                                  Target neutral fluid balance

<span class="algo-arrow">▼</span>
<span class="algo-no">FLUID OVERLOADED?</span> <span class="algo-arrow">──────────────────────────────────</span><span class="algo-arrow">►</span> <span class="algo-action">PHASE 4: REMOVE FLUID</span>
                                                       Step 1: Furosemide 1.0–1.5 mg/kg IV bolus
                                                       <span class="algo-yes">UO &gt;200 mL/2h?</span> → Continue scheduled dosing
                                                       <span class="algo-no">UO &lt;200 mL/2h?</span> → Escalate (double dose q6–12h)
                                                       Still failing? → Add metolazone 2.5–10 mg PO
                                                       Still failing? → INITIATE RRT
                                                          CRRT: 20–25 mL/kg/h effluent
                                                          Net UF: titrate gently (avoid aggressive UF)
                                                          IHD: Kt/V 3.9 per week

<span class="algo-arrow">▼</span>
UNIVERSAL STOP SIGNS — STOP GIVING FLUID WHEN:
<span class="algo-no">✗</span> IVC dilating | SpO₂ dropping | crackles appearing | CVP rising

STOP REMOVING FLUID WHEN:
<span class="algo-no">✗</span> Hypotension | creatinine rising | UO dropping excessively | target weight reached
  </div>
</div>

<!-- Table 20 -->
<div class="section">
  <div class="section-title">Table 20: Scenario Quick-Reference</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Scenario</th><th>Give / Restrict / Remove</th><th>Volume</th><th>Rate</th><th>Stop When</th></tr></thead>
      <tbody>
        <tr class="green-row"><td>Prerenal AKI</td><td class="green">Give</td><td>500 mL boluses</td><td>≤15 min per bolus</td><td>UO &gt;0.5 mL/kg/h; creatinine improving</td></tr>
        <tr><td>Euvolemic AKI maintenance</td><td>Maintain</td><td>UO + ~500 mL insensible</td><td>Continuous low rate</td><td>Renal recovery or RRT initiated</td></tr>
        <tr class="danger-row"><td>Oliguric AKI + fluid overload</td><td class="red">Remove (diuretics)</td><td>Until euvolemic</td><td>Furosemide IV; stepwise escalation</td><td>UO adequate; target weight reached</td></tr>
        <tr class="green-row"><td>Rhabdomyolysis</td><td class="green">Give aggressively</td><td>Up to 10 L/day</td><td>High-rate continuous</td><td>UO 200–300 mL/h sustained for 24h</td></tr>
        <tr class="green-row"><td>Contrast-AKI prophylaxis</td><td class="green">Give</td><td>1–1.5 mL/kg/h</td><td>1h pre + 4–6h post procedure</td><td>Procedure completed + 4–6h post</td></tr>
        <tr class="danger-row"><td>Pulmonary edema in AKI</td><td class="red">Remove (diuretics + ventilation)</td><td>Until respiratory improvement</td><td>IV furosemide ± nitroglycerin 5 µg/min</td><td>SpO₂ normal; crackles resolved</td></tr>
        <tr class="danger-row"><td>ACS (IAP &gt;20 mmHg)</td><td class="red">Stop giving; decompress surgically</td><td>N/A</td><td>N/A — surgical emergency</td><td>Surgical decompression done</td></tr>
        <tr class="danger-row"><td>CKD with peripheral edema</td><td class="red">Remove (oral diuretics)</td><td>Until dry weight achieved</td><td>Oral loop diuretic daily</td><td>Euvolemia; BP controlled; edema cleared</td></tr>
        <tr><td>CKD + acute illness (sick days)</td><td>Hold diuretics; restrict if overloaded</td><td>Guided by clinical status</td><td>Oral rehydration if hypovolemic</td><td>Illness resolved; restart drugs carefully</td></tr>
        <tr><td>Elective surgery (major abdominal)</td><td class="green">Give (liberal)</td><td>Target +1–2 kg at 24h post-op</td><td>Perioperative</td><td>24h post-op target achieved</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- Table 21 -->
<div class="section">
  <div class="section-title">Table 21: Key Trials and Evidence Summary</div>
  <div class="table-wrapper">
    <table>
      <thead><tr><th>Trial / Study</th><th>Population</th><th>Comparison</th><th>Key Finding</th><th>Grade</th></tr></thead>
      <tbody>
        <tr><td class="bold">SPLIT Trial</td><td>ICU patients</td><td>Plasma-Lyte 148 vs 0.9% saline</td><td>No difference in AKI or RRT</td><td>RCT</td></tr>
        <tr><td class="bold">SMART Trial</td><td>ICU patients</td><td>Balanced crystalloids vs saline</td><td>Lower composite MAKE outcome with balanced</td><td>RCT</td></tr>
        <tr><td class="bold">SALT-ED Trial</td><td>Non-ICU patients</td><td>Balanced crystalloids vs saline</td><td>Fewer major adverse kidney events</td><td>RCT</td></tr>
        <tr><td class="bold">ATN Trial</td><td>1,124 critically ill AKI</td><td>Intensive vs standard RRT dose</td><td>No survival benefit from intensive dosing</td><td>Large RCT</td></tr>
        <tr><td class="bold">RENAL Trial</td><td>Large ICU AKI cohort</td><td>High vs standard CRRT dose</td><td>No difference in 90-day mortality</td><td>Large RCT</td></tr>
        <tr><td class="bold">SLED vs CRRT</td><td>232 surgical ICU</td><td>SLED vs CRRT</td><td>No mortality difference (49.6% vs 55.6%, P=0.43)</td><td>RCT</td></tr>
        <tr><td class="bold">Furosemide Stress Test</td><td>AKI stage ≤2</td><td>1–1.5 mg/kg IV furosemide</td><td>UO &lt;200 mL/2h predicts AKIN stage 3 (Sn 87%, Sp 84%)</td><td>Prospective</td></tr>
        <tr><td class="bold">KDIGO 2026 Liberal vs Restrictive</td><td>Elective major abdominal surgery</td><td>Liberal (+1–2 kg/24h) vs restrictive (net zero)</td><td>Restrictive: RRT risk RR 3.24 (CI 1.06–9.92); Liberal preferred</td><td class="bold">1B KDIGO 2026</td></tr>
        <tr><td class="bold">Net UF meta-analysis 2025</td><td>Critically ill on CRRT</td><td>Aggressive vs standard UF rate</td><td>Aggressive UF = increased mortality; titrate to euvolemia</td><td>Systematic review (PMID 39889501)</td></tr>
      </tbody>
    </table>
  </div>
</div>

<!-- Sources footer -->
<div class="sources-footer">
  <strong>References and Sources</strong>
  1. Brenner &amp; Rector's The Kidney, 2-Volume Set &nbsp;&bull;&nbsp;
  2. Harrison's Principles of Internal Medicine 22nd Edition (2025, McGraw-Hill) &nbsp;&bull;&nbsp;
  3. Comprehensive Clinical Nephrology, 7th Edition &nbsp;&bull;&nbsp;
  4. Tintinalli's Emergency Medicine: A Comprehensive Study Guide &nbsp;&bull;&nbsp;
  5. Goldman-Cecil Medicine International Edition &nbsp;&bull;&nbsp;
  6. KDIGO 2026 Clinical Practice Guideline for Acute Kidney Injury and Acute Kidney Disease (Public Review Draft, March 2026) &nbsp;&bull;&nbsp;
  7. Jin L et al. Association of net ultrafiltration intensity and clinical outcomes among critically ill patients receiving CRRT: systematic review and meta-analysis. Aust Crit Care. 2025 May. PMID: 39889501
</div>

</body>
</html>

Running Command

cd /home/daytona/workspace/aki-ckd-fluid && python3 -c " from weasyprint import HTML, CSS print('weasyprint available') HTML(filename='fluid_management.html').write_pdf('Fluid_Management_AKI_CKD_Dr_Fahad.pdf') print('PDF created') import os size = os.path.getsize('Fluid_Management_AKI_CKD_Dr_Fahad.pdf') print(f'File size: {size} bytes ({size/1024/1024:.2f} MB)') "

Running Command

which wkhtmltopdf; wkhtmltopdf --version 2>/dev/null; which chromium-browser 2>/dev/null; which google-chrome 2>/dev/null; which chromium 2>/dev/null; python3 -c "import pdfkit; print('pdfkit ok')" 2>/dev/null; python3 -c "import xhtml2pdf; print('xhtml2pdf ok')" 2>/dev/null; python3 -c "import reportlab; print('reportlab ok')" 2>/dev/null

Running Command

chromium --headless --disable-gpu --no-sandbox --print-to-pdf=/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_AKI_CKD_Dr_Fahad.pdf --print-to-pdf-no-header /home/daytona/workspace/aki-ckd-fluid/fluid_management.html 2>&1; echo "exit: $?"

Running Command

python3 -c " from pypdf import PdfReader reader = PdfReader('/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_AKI_CKD_Dr_Fahad.pdf') print(f'Pages: {len(reader.pages)}') print(f'First page text snippet: {reader.pages[0].extract_text()[:200]}') "

Your PDF is ready. Here's the download link:

Fluid Management AKI CKD Dr Fahad

PDF Document · PDF

What's inside (21 pages):

Section	Content
Cover page	Title, subtitle, all sources listed
Table of Contents	6 parts, 21 tables, algorithm
Part 1	Pathophysiology + 4-Phase ROSE Framework + Volume Assessment
Part 2	When/how to give fluids — indications, fluid type, volumes, rates, special scenarios
Part 3	When/how to restrict and remove — diuretic escalation ladder, drug evidence, stop signs
Part 4	RRT indications, modality selection, CRRT dosing, ultrafiltration rates, key trials
Part 5	CKD sodium/fluid restriction by stage, pharmacology, Goldman-Cecil action plan, sick day rules
Part 6	Master AKI vs CKD comparison, clinical decision algorithm, scenario quick-reference, all key trials

Flowcharts

Asking for Preferences

Writing File

~/aki-ckd-fluid/flowcharts.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Fluid Management Flowcharts — AKI &amp; CKD</title>
<style>
  @page { size: A4 landscape; margin: 10mm 12mm; }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body { font-family: 'Segoe UI', Arial, sans-serif; background: #fff; color: #1a1a1a; }

  .page {
    width: 277mm;
    min-height: 190mm;
    page-break-after: always;
    padding: 4mm 2mm 4mm 2mm;
    position: relative;
  }
  .page:last-child { page-break-after: avoid; }

  /* Header strip */
  .page-header {
    display: flex;
    align-items: center;
    margin-bottom: 5mm;
    padding: 3mm 5mm;
    border-radius: 6px;
    color: white;
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  .page-header .chart-num {
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    text-transform: uppercase;
    opacity: 0.8;
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    min-width: 60px;
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  .page-header .source {
    font-size: 7.5pt;
    opacity: 0.75;
    text-align: right;
    line-height: 1.4;
  }

  .hdr-blue   { background: linear-gradient(135deg, #0a3d6b, #1565a8); }
  .hdr-teal   { background: linear-gradient(135deg, #00695c, #00897b); }
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  .hdr-orange { background: linear-gradient(135deg, #bf360c, #e64a19); }

  /* SVG container */
  .chart-container { width: 100%; }
  svg { width: 100%; height: auto; display: block; }

  /* Legend */
  .legend {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 3mm;
    padding: 2mm 4mm;
    background: #f5f7fa;
    border-radius: 5px;
    border: 1px solid #dde4ee;
  }
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    display: flex;
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    gap: 5px;
    font-size: 7.5pt;
    color: #444;
  }
  .legend-box {
    width: 14px; height: 10px; border-radius: 2px; flex-shrink: 0;
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    width: 12px; height: 12px; transform: rotate(45deg);
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  }
  .legend-oval {
    width: 22px; height: 12px; border-radius: 6px; flex-shrink: 0;
  }
</style>
</head>
<body>

<!-- ═══════════════════════════════════════════════════════════
     FLOWCHART 1 — AKI FLUID RESUSCITATION
═══════════════════════════════════════════════════════════ -->
<div class="page">
  <div class="page-header hdr-blue">
    <span class="chart-num">Chart 1 of 4</span>
    <h1>AKI Fluid Resuscitation — When &amp; How to Give Fluids</h1>
    <div class="source">Sources: KDIGO 2026 · Brenner &amp; Rector's<br>Comprehensive Clinical Nephrology 7th Ed.</div>
  </div>

  <div class="chart-container">
  <svg viewBox="0 0 900 520" xmlns="http://www.w3.org/2000/svg" font-family="Segoe UI, Arial, sans-serif">
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        <path d="M0,0 L0,6 L8,3 z" fill="#2e7d32"/>
      </marker>
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        <path d="M0,0 L0,6 L8,3 z" fill="#e65100"/>
      </marker>
    </defs>

    <!-- START -->
    <ellipse cx="450" cy="28" rx="160" ry="20" fill="#0a3d6b"/>
    <text x="450" y="33" text-anchor="middle" fill="white" font-size="12" font-weight="bold">PATIENT WITH AKI OR SUSPECTED AKI</text>

    <!-- Arrow down -->
    <line x1="450" y1="48" x2="450" y2="72" stroke="#334" stroke-width="2" marker-end="url(#arr1)"/>

    <!-- ASSESS box -->
    <rect x="270" y="72" width="360" height="46" rx="8" fill="#e3f2fd" stroke="#1565a8" stroke-width="2"/>
    <text x="450" y="90" text-anchor="middle" fill="#0a3d6b" font-size="11" font-weight="bold">STEP 1: ASSESS VOLUME STATUS</text>
    <text x="450" y="107" text-anchor="middle" fill="#1565a8" font-size="9">IVC on USS · Urine Na⁺ / FENa / FEUrea · Daily weight · BP, HR, JVP · Bladder pressure</text>

    <!-- Arrow down -->
    <line x1="450" y1="118" x2="450" y2="144" stroke="#334" stroke-width="2" marker-end="url(#arr1)"/>

    <!-- DIAMOND: Hypovolemic? -->
    <polygon points="450,144 560,176 450,208 340,176" fill="#fff9c4" stroke="#f9a825" stroke-width="2"/>
    <text x="450" y="172" text-anchor="middle" fill="#5a3e00" font-size="11" font-weight="bold">HYPOVOLEMIC?</text>
    <text x="450" y="188" text-anchor="middle" fill="#5a3e00" font-size="9">(collapsed IVC, UNa &lt;20, FENa &lt;1%, low BP)</text>

    <!-- YES → left branch -->
    <line x1="340" y1="176" x2="200" y2="176" stroke="#2e7d32" stroke-width="2" marker-end="url(#arr-green)"/>
    <text x="268" y="168" text-anchor="middle" fill="#2e7d32" font-size="10" font-weight="bold">YES</text>

    <!-- PHASE 1 box (left) -->
    <rect x="30" y="148" width="170" height="106" rx="8" fill="#e8f5e9" stroke="#2e7d32" stroke-width="2"/>
    <text x="115" y="167" text-anchor="middle" fill="#1b5e20" font-size="10" font-weight="bold">⬛ PHASE 1: RESCUE</text>
    <text x="115" y="181" text-anchor="middle" fill="#2e7d32" font-size="9" font-weight="bold">Balanced crystalloid bolus</text>
    <text x="115" y="194" text-anchor="middle" fill="#333" font-size="9">500 mL over ≤15 minutes</text>
    <text x="115" y="207" text-anchor="middle" fill="#333" font-size="9">Reassess BP, UO, IVC, SV</text>
    <text x="115" y="220" text-anchor="middle" fill="#333" font-size="9">after each bolus</text>
    <text x="115" y="236" text-anchor="middle" fill="#c62828" font-size="8.5" font-weight="bold">NOT normal saline (↑ AKI risk)</text>

    <!-- Arrow from Phase 1 down -->
    <line x1="115" y1="254" x2="115" y2="276" stroke="#334" stroke-width="2" marker-end="url(#arr1)"/>

    <!-- DIAMOND: Perfusion restored? -->
    <polygon points="115,276 218,306 115,336 12,306" fill="#fff9c4" stroke="#f9a825" stroke-width="2"/>
    <text x="115" y="302" text-anchor="middle" fill="#5a3e00" font-size="9.5" font-weight="bold">Perfusion</text>
    <text x="115" y="317" text-anchor="middle" fill="#5a3e00" font-size="9.5" font-weight="bold">Restored?</text>

    <!-- YES → continue to Phase 2 -->
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    <text x="238" y="298" text-anchor="middle" fill="#2e7d32" font-size="9" font-weight="bold">YES</text>

    <!-- Still hypovol? keep bolusing -->
    <line x1="12" y1="306" x2="12" y2="210" stroke="#e65100" stroke-width="2" stroke-dasharray="5,3"/>
    <line x1="12" y1="210" x2="30" y2="210" stroke="#e65100" stroke-width="2" marker-end="url(#arr-orange)" stroke-dasharray="5,3"/>
    <text x="6" y="262" text-anchor="middle" fill="#e65100" font-size="8" transform="rotate(-90 6 262)">REPEAT BOLUS</text>

    <!-- PHASE 2 box (center-left) -->
    <rect x="260" y="272" width="170" height="110" rx="8" fill="#e3f2fd" stroke="#1565a8" stroke-width="2"/>
    <text x="345" y="291" text-anchor="middle" fill="#0a3d6b" font-size="10" font-weight="bold">⬛ PHASE 2: OPTIMIZE</text>
    <text x="345" y="305" text-anchor="middle" fill="#1565a8" font-size="9" font-weight="bold">Fluid Challenge</text>
    <text x="345" y="318" text-anchor="middle" fill="#333" font-size="9">250 mL or 3 mL/kg</text>
    <text x="345" y="331" text-anchor="middle" fill="#333" font-size="9">over 5–10 minutes</text>
    <text x="345" y="344" text-anchor="middle" fill="#333" font-size="9">+ stroke volume monitoring</text>
    <text x="345" y="360" text-anchor="middle" fill="#333" font-size="8.5">PLR test / real-time SV/CO</text>

    <!-- Arrow from Phase 2 -->
    <line x1="430" y1="327" x2="470" y2="327" stroke="#334" stroke-width="2" marker-end="url(#arr1)"/>

    <!-- DIAMOND: Fluid responsive? -->
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    <text x="540" y="351" text-anchor="middle" fill="#5a3e00" font-size="9.5" font-weight="bold">SV rises</text>
    <text x="540" y="366" text-anchor="middle" fill="#5a3e00" font-size="9.5" font-weight="bold">≥10–15%?</text>

    <!-- NO → stop fluids -->
    <line x1="635" y1="357" x2="720" y2="357" stroke="#c62828" stroke-width="2" marker-end="url(#arr-red)"/>
    <text x="675" y="349" text-anchor="middle" fill="#c62828" font-size="9" font-weight="bold">NO</text>
    <rect x="720" y="330" width="165" height="54" rx="8" fill="#fdecea" stroke="#c62828" stroke-width="2"/>
    <text x="802" y="350" text-anchor="middle" fill="#b71c1c" font-size="10" font-weight="bold">⛔ STOP FLUIDS</text>
    <text x="802" y="364" text-anchor="middle" fill="#b71c1c" font-size="9">Reassess: cardiac output,</text>
    <text x="802" y="377" text-anchor="middle" fill="#b71c1c" font-size="9">vasopressors, other causes</text>

    <!-- YES → Phase 3 -->
    <line x1="540" y1="387" x2="540" y2="418" stroke="#2e7d32" stroke-width="2" marker-end="url(#arr-green)"/>
    <text x="548" y="406" fill="#2e7d32" font-size="9" font-weight="bold">YES</text>

    <!-- PHASE 3 -->
    <rect x="400" y="418" width="280" height="90" rx="8" fill="#e8f5e9" stroke="#2e7d32" stroke-width="2"/>
    <text x="540" y="437" text-anchor="middle" fill="#1b5e20" font-size="10" font-weight="bold">⬛ PHASE 3: STABILIZE</text>
    <text x="540" y="453" text-anchor="middle" fill="#2e7d32" font-size="9" font-weight="bold">Target: Neutral Fluid Balance</text>
    <text x="540" y="467" text-anchor="middle" fill="#333" font-size="9">Fluid in = UO + insensible (~500–800 mL/day)</text>
    <text x="540" y="481" text-anchor="middle" fill="#333" font-size="9">Minimize unnecessary IV fluids</text>
    <text x="540" y="496" text-anchor="middle" fill="#e65100" font-size="8.5" font-weight="bold">If overloaded → proceed to Phase 4 (Chart 2)</text>

    <!-- NO branch from Hypovolemic? diamond -->
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    <text x="458" y="228" fill="#c62828" font-size="9" font-weight="bold">NO</text>

    <!-- NO → check overloaded -->
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    <text x="450" y="260" text-anchor="middle" fill="#b71c1c" font-size="9.5" font-weight="bold">Do NOT give fluids — assess for overload or euvolemia</text>

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    <text x="145" y="406" text-anchor="middle" fill="#bf360c" font-size="10" font-weight="bold">⚠ STOP GIVING FLUID WHEN:</text>
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    <text x="145" y="435" text-anchor="middle" fill="#333" font-size="9">• SpO₂ dropping / bilateral crackles</text>
    <text x="145" y="449" text-anchor="middle" fill="#333" font-size="9">• CVP rising / JVP elevated</text>
    <text x="145" y="463" text-anchor="middle" fill="#333" font-size="9">• Weight rising &gt;0.5 kg/day</text>
    <text x="145" y="477" text-anchor="middle" fill="#333" font-size="9">• Bladder pressure &gt;12 mmHg</text>
    <text x="145" y="496" text-anchor="middle" fill="#c62828" font-size="8.5" font-weight="bold">Excess fluid → independent mortality risk</text>
  </svg>
  </div>

  <div class="legend">
    <div class="legend-item"><div class="legend-oval" style="background:#e8f5e9;border:1.5px solid #2e7d32;"></div> Action / Phase</div>
    <div class="legend-item"><div class="legend-diamond" style="background:#fff9c4;border:1.5px solid #f9a825;"></div> Decision Point</div>
    <div class="legend-item"><div class="legend-box" style="background:#fdecea;border:1.5px solid #c62828;"></div> Stop / Avoid</div>
    <div class="legend-item"><div class="legend-box" style="background:#e3f2fd;border:1.5px solid #1565a8;"></div> Assessment</div>
    <div class="legend-item"><div class="legend-box" style="background:#fff3e0;border:1.5px solid #e65100;"></div> Warning / Caution</div>
  </div>
</div>

<!-- ═══════════════════════════════════════════════════════════
     FLOWCHART 2 — FLUID REMOVAL & RRT
═══════════════════════════════════════════════════════════ -->
<div class="page">
  <div class="page-header hdr-teal">
    <span class="chart-num">Chart 2 of 4</span>
    <h1>AKI Fluid Removal — Diuretic Escalation &amp; RRT Decision</h1>
    <div class="source">Sources: KDIGO 2026 · Harrison's 22E<br>Comprehensive Clinical Nephrology 7th Ed.</div>
  </div>

  <div class="chart-container">
  <svg viewBox="0 0 920 530" xmlns="http://www.w3.org/2000/svg" font-family="Segoe UI, Arial, sans-serif">
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    <!-- START -->
    <ellipse cx="460" cy="26" rx="220" ry="20" fill="#00695c"/>
    <text x="460" y="31" text-anchor="middle" fill="white" font-size="11.5" font-weight="bold">AKI WITH FLUID OVERLOAD / VOLUME EXCESS</text>

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    <!-- Urgent indications box -->
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    <text x="460" y="87" text-anchor="middle" fill="#b71c1c" font-size="10.5" font-weight="bold">CHECK FOR URGENT / EMERGENT RRT INDICATIONS</text>
    <text x="460" y="105" text-anchor="middle" fill="#b71c1c" font-size="9">pH ≤7.1 · Hyperkalemia + ECG changes · Pulmonary edema (airway threatened) · Uremic encephalopathy/pericarditis</text>

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    <!-- DIAMOND urgent? -->
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    <text x="460" y="168" text-anchor="middle" fill="#5a3e00" font-size="11" font-weight="bold">URGENT RRT</text>
    <text x="460" y="184" text-anchor="middle" fill="#5a3e00" font-size="9">indication present?</text>

    <!-- YES → immediate RRT -->
    <line x1="578" y1="172" x2="660" y2="172" stroke="#c62828" stroke-width="2.5" marker-end="url(#a2r)"/>
    <text x="617" y="164" text-anchor="middle" fill="#c62828" font-size="10" font-weight="bold">YES</text>
    <rect x="660" y="138" width="240" height="68" rx="8" fill="#fdecea" stroke="#c62828" stroke-width="2.5"/>
    <text x="780" y="158" text-anchor="middle" fill="#b71c1c" font-size="11" font-weight="bold">🔴 INITIATE RRT IMMEDIATELY</text>
    <text x="780" y="174" text-anchor="middle" fill="#b71c1c" font-size="9">Select modality based on hemodynamics</text>
    <text x="780" y="188" text-anchor="middle" fill="#b71c1c" font-size="9">(see RRT modality box →)</text>

    <!-- NO → diuretics -->
    <line x1="460" y1="202" x2="460" y2="228" stroke="#2e7d32" stroke-width="2" marker-end="url(#a2g)"/>
    <text x="468" y="218" fill="#2e7d32" font-size="9" font-weight="bold">NO</text>

    <!-- STEP 1 -->
    <rect x="270" y="228" width="380" height="56" rx="8" fill="#e0f2f1" stroke="#00695c" stroke-width="2"/>
    <text x="460" y="247" text-anchor="middle" fill="#004d40" font-size="10.5" font-weight="bold">STEP 1: FUROSEMIDE IV BOLUS</text>
    <text x="460" y="262" text-anchor="middle" fill="#00695c" font-size="10" font-weight="bold">1.0 mg/kg IV (naive)  ·  1.5 mg/kg IV (prior furosemide use)</text>
    <text x="460" y="277" text-anchor="middle" fill="#333" font-size="9">Goal: Urine output &gt;200 mL within 2 hours  ·  Monitor hourly</text>

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    <!-- DIAMOND: UO >200 mL? -->
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    <text x="460" y="331" text-anchor="middle" fill="#5a3e00" font-size="10" font-weight="bold">UO &gt;200 mL</text>
    <text x="460" y="347" text-anchor="middle" fill="#5a3e00" font-size="9">in 2 hours?</text>

    <!-- YES → continue dosing -->
    <line x1="350" y1="336" x2="244" y2="336" stroke="#2e7d32" stroke-width="2" marker-end="url(#a2g)"/>
    <text x="294" y="328" text-anchor="middle" fill="#2e7d32" font-size="10" font-weight="bold">YES</text>
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    <text x="147" y="326" text-anchor="middle" fill="#1b5e20" font-size="10" font-weight="bold">✔ Continue Scheduled Dosing</text>
    <text x="147" y="341" text-anchor="middle" fill="#333" font-size="9">IV boluses or drip (10–40 mg/h)</text>
    <text x="147" y="355" text-anchor="middle" fill="#333" font-size="9">until target fluid removal achieved</text>

    <!-- FST note -->
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    <text x="147" y="397" text-anchor="middle" fill="#5a3e00" font-size="9.5" font-weight="bold">⚡ Furosemide Stress Test</text>
    <text x="147" y="412" text-anchor="middle" fill="#333" font-size="8.5">UO &lt;200 mL/2h = predicts</text>
    <text x="147" y="425" text-anchor="middle" fill="#333" font-size="8.5">AKIN Stage 3 (Sn 87%, Sp 84%)</text>
    <text x="147" y="439" text-anchor="middle" fill="#c62828" font-size="8.5" font-weight="bold">→ escalate / plan for RRT</text>

    <!-- NO → step 2 -->
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    <text x="468" y="380" fill="#c62828" font-size="9" font-weight="bold">NO</text>

    <!-- STEP 2 -->
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    <text x="460" y="408" text-anchor="middle" fill="#004d40" font-size="10.5" font-weight="bold">STEP 2: DOUBLE DOSE</text>
    <text x="460" y="423" text-anchor="middle" fill="#00695c" font-size="9.5">160–200 mg IV bolus every 6–12 hours</text>
    <text x="460" y="436" text-anchor="middle" fill="#333" font-size="9">Reassess response; monitor electrolytes and hearing</text>

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    <!-- DIAMOND: Response? -->
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    <text x="460" y="478" text-anchor="middle" fill="#5a3e00" font-size="9" font-weight="bold">Adequate</text>
    <text x="460" y="493" text-anchor="middle" fill="#5a3e00" font-size="9">diuresis?</text>

    <!-- NO → step 3 -->
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    <text x="592" y="474" text-anchor="middle" fill="#c62828" font-size="9" font-weight="bold">NO</text>

    <!-- STEP 3 -->
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    <text x="740" y="473" text-anchor="middle" fill="#004d40" font-size="10" font-weight="bold">STEP 3: ADD THIAZIDE</text>
    <text x="740" y="488" text-anchor="middle" fill="#00695c" font-size="9">Metolazone 2.5–10 mg PO</text>
    <text x="740" y="501" text-anchor="middle" fill="#333" font-size="8.5">30 min before furosemide dose</text>

    <!-- Arrow from step 3 to RRT check -->
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    <text x="855" y="474" text-anchor="middle" fill="#c62828" font-size="8.5" font-weight="bold">Fails?</text>

    <!-- RRT modality box (right side) -->
    <rect x="660" y="216" width="250" height="218" rx="8" fill="#ede7f6" stroke="#4527a0" stroke-width="2"/>
    <text x="785" y="236" text-anchor="middle" fill="#311b92" font-size="10.5" font-weight="bold">RRT MODALITY GUIDE</text>
    <line x1="665" y1="242" x2="905" y2="242" stroke="#7b1fa2" stroke-width="1"/>
    <text x="675" y="258" fill="#4527a0" font-size="9" font-weight="bold">Hemodynamically STABLE:</text>
    <text x="675" y="272" fill="#333" font-size="9">→ IHD (Intermittent Hemodialysis)</text>
    <text x="675" y="286" fill="#333" font-size="8.5">   Rapid fluid removal, 2–4h sessions</text>
    <text x="675" y="305" fill="#4527a0" font-size="9" font-weight="bold">Hemodynamically UNSTABLE:</text>
    <text x="675" y="319" fill="#333" font-size="9">→ CRRT (CVVH / CVVHD / CVVHDF)</text>
    <text x="675" y="333" fill="#333" font-size="8.5">   Effluent dose: 20–25 mL/kg/h (1B)</text>
    <text x="675" y="347" fill="#333" font-size="8.5">   Net UF: titrate gently (aggressive = harm)</text>
    <text x="675" y="361" fill="#c62828" font-size="8.5" font-weight="bold">   ⛔ Do NOT use HVHF (no benefit, Grade 1B)</text>
    <text x="675" y="380" fill="#4527a0" font-size="9" font-weight="bold">INTERMEDIATE instability:</text>
    <text x="675" y="394" fill="#333" font-size="9">→ SLED (8–12h sessions)</text>
    <text x="675" y="408" fill="#333" font-size="8.5">   IHD Kt/V target: 3.9/week (1B)</text>
    <text x="675" y="422" fill="#333" font-size="8.5">   Intensity escalation: NO benefit (ATN/RENAL)</text>

    <!-- AVOID box -->
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    <text x="159" y="473" text-anchor="middle" fill="#b71c1c" font-size="10" font-weight="bold">⛔ NEVER USE FOR DIURESIS:</text>
    <text x="159" y="488" text-anchor="middle" fill="#333" font-size="9">• Low-dose dopamine (no benefit, arrhythmia risk)</text>
    <text x="159" y="502" text-anchor="middle" fill="#333" font-size="9">• Mannitol (no role in established AKI)</text>
    <text x="159" y="516" text-anchor="middle" fill="#333" font-size="9">• Aminoglycosides + diuretics (ototoxicity)</text>
  </svg>
  </div>

  <div class="legend">
    <div class="legend-item"><div class="legend-oval" style="background:#e0f2f1;border:1.5px solid #00695c;"></div> Treatment Step</div>
    <div class="legend-item"><div class="legend-diamond" style="background:#fff9c4;border:1.5px solid #f9a825;"></div> Decision Point</div>
    <div class="legend-item"><div class="legend-box" style="background:#fdecea;border:1.5px solid #c62828;"></div> Urgent / Avoid</div>
    <div class="legend-item"><div class="legend-box" style="background:#e8f5e9;border:1.5px solid #2e7d32;"></div> Success / Continue</div>
    <div class="legend-item"><div class="legend-box" style="background:#ede7f6;border:1.5px solid #4527a0;"></div> RRT Reference</div>
  </div>
</div>

<!-- ═══════════════════════════════════════════════════════════
     FLOWCHART 3 — CKD FLUID MANAGEMENT
═══════════════════════════════════════════════════════════ -->
<div class="page">
  <div class="page-header hdr-purple">
    <span class="chart-num">Chart 3 of 4</span>
    <h1>CKD Chronic Fluid Management — Stage-Based Approach</h1>
    <div class="source">Sources: Comprehensive Clinical Nephrology 7th Ed.<br>Goldman-Cecil Medicine · KDIGO 2026</div>
  </div>

  <div class="chart-container">
  <svg viewBox="0 0 920 530" xmlns="http://www.w3.org/2000/svg" font-family="Segoe UI, Arial, sans-serif">
    <defs>
      <marker id="a3" markerWidth="8" markerHeight="8" refX="6" refY="3" orient="auto"><path d="M0,0 L0,6 L8,3 z" fill="#334"/></marker>
      <marker id="a3p" markerWidth="8" markerHeight="8" refX="6" refY="3" orient="auto"><path d="M0,0 L0,6 L8,3 z" fill="#4527a0"/></marker>
      <marker id="a3g" markerWidth="8" markerHeight="8" refX="6" refY="3" orient="auto"><path d="M0,0 L0,6 L8,3 z" fill="#2e7d32"/></marker>
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    <!-- START -->
    <ellipse cx="460" cy="26" rx="220" ry="20" fill="#4527a0"/>
    <text x="460" y="31" text-anchor="middle" fill="white" font-size="12" font-weight="bold">PATIENT WITH CHRONIC KIDNEY DISEASE (CKD)</text>

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    <!-- Classify GFR -->
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    <text x="460" y="84" text-anchor="middle" fill="#311b92" font-size="10.5" font-weight="bold">STEP 1: CLASSIFY CKD STAGE BY eGFR + ALBUMINURIA</text>
    <text x="460" y="100" text-anchor="middle" fill="#4527a0" font-size="9">Measure eGFR, urine ACR; check BP, electrolytes, weight, edema</text>

    <!-- Stage branches -->
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    <!-- Stage row -->
    <!-- G1-G2 -->
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    <text x="91" y="148" text-anchor="middle" fill="#283593" font-size="10" font-weight="bold">G1–G2</text>
    <text x="91" y="162" text-anchor="middle" fill="#283593" font-size="9">eGFR ≥60 mL/min</text>
    <line x1="15" y1="167" x2="167" y2="167" stroke="#9fa8da" stroke-width="1"/>
    <text x="91" y="181" text-anchor="middle" fill="#333" font-size="8.5">Na &lt;90 mmol/day</text>
    <text x="91" y="194" text-anchor="middle" fill="#333" font-size="8.5">ACEi/ARB + SGLT2i</text>
    <text x="91" y="207" text-anchor="middle" fill="#333" font-size="8.5">± MRA (finerenone)</text>
    <text x="91" y="220" text-anchor="middle" fill="#333" font-size="8.5">Fluid: individualized</text>
    <text x="91" y="233" text-anchor="middle" fill="#333" font-size="8.5">Treat comorbidities</text>
    <text x="91" y="250" text-anchor="middle" fill="#283593" font-size="8" font-weight="bold">No routine diuretics</text>

    <!-- G3a-G3b -->
    <rect x="184" y="130" width="162" height="130" rx="8" fill="#e8eaf6" stroke="#5c6bc0" stroke-width="2"/>
    <text x="265" y="148" text-anchor="middle" fill="#283593" font-size="10" font-weight="bold">G3a–G3b</text>
    <text x="265" y="162" text-anchor="middle" fill="#283593" font-size="9">eGFR 30–59</text>
    <line x1="189" y1="167" x2="341" y2="167" stroke="#9fa8da" stroke-width="1"/>
    <text x="265" y="181" text-anchor="middle" fill="#333" font-size="8.5">Na &lt;90 mmol/day</text>
    <text x="265" y="194" text-anchor="middle" fill="#333" font-size="8.5">ACEi/ARB + SGLT2i</text>
    <text x="265" y="207" text-anchor="middle" fill="#333" font-size="8.5">Loop diuretic if edema</text>
    <text x="265" y="220" text-anchor="middle" fill="#333" font-size="8.5">Daily weight monitoring</text>
    <text x="265" y="233" text-anchor="middle" fill="#333" font-size="8.5">BP control: &lt;130/80</text>
    <text x="265" y="250" text-anchor="middle" fill="#c62828" font-size="8" font-weight="bold">Sick day rules apply</text>

    <!-- G4 -->
    <rect x="358" y="130" width="162" height="130" rx="8" fill="#ede7f6" stroke="#7b1fa2" stroke-width="2"/>
    <text x="439" y="148" text-anchor="middle" fill="#4a148c" font-size="10" font-weight="bold">G4</text>
    <text x="439" y="162" text-anchor="middle" fill="#4a148c" font-size="9">eGFR 15–29</text>
    <line x1="363" y1="167" x2="515" y2="167" stroke="#ba68c8" stroke-width="1"/>
    <text x="439" y="181" text-anchor="middle" fill="#333" font-size="8.5">Na &lt;90 mmol/day</text>
    <text x="439" y="194" text-anchor="middle" fill="#333" font-size="8.5">Loop diuretic (higher dose)</text>
    <text x="439" y="207" text-anchor="middle" fill="#333" font-size="8.5">Restrict K⁺ + PO₄</text>
    <text x="439" y="220" text-anchor="middle" fill="#333" font-size="8.5">Protein 0.8 g/kg/day</text>
    <text x="439" y="233" text-anchor="middle" fill="#c62828" font-size="8.5" font-weight="bold">RRT planning begins</text>
    <text x="439" y="250" text-anchor="middle" fill="#c62828" font-size="8" font-weight="bold">Strict sick day rules</text>

    <!-- G5 -->
    <rect x="532" y="130" width="162" height="130" rx="8" fill="#fce4ec" stroke="#c62828" stroke-width="2"/>
    <text x="613" y="148" text-anchor="middle" fill="#b71c1c" font-size="10" font-weight="bold">G5</text>
    <text x="613" y="162" text-anchor="middle" fill="#b71c1c" font-size="9">eGFR &lt;15</text>
    <line x1="537" y1="167" x2="689" y2="167" stroke="#ef9a9a" stroke-width="1"/>
    <text x="613" y="181" text-anchor="middle" fill="#333" font-size="8.5">Fluid balance via RRT</text>
    <text x="613" y="194" text-anchor="middle" fill="#333" font-size="8.5">Restrict Na⁺ strictly</text>
    <text x="613" y="207" text-anchor="middle" fill="#333" font-size="8.5">K⁺ + PO₄ restriction</text>
    <text x="613" y="220" text-anchor="middle" fill="#333" font-size="8.5">Dialysis dry weight target</text>
    <text x="613" y="233" text-anchor="middle" fill="#c62828" font-size="8.5" font-weight="bold">Dialysis initiation</text>
    <text x="613" y="250" text-anchor="middle" fill="#c62828" font-size="8" font-weight="bold">Guided by sx + eGFR trend</text>

    <!-- Common actions box -->
    <rect x="706" y="130" width="200" height="130" rx="8" fill="#e8f5e9" stroke="#2e7d32" stroke-width="2"/>
    <text x="806" y="148" text-anchor="middle" fill="#1b5e20" font-size="10" font-weight="bold">ALL STAGES</text>
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    <text x="806" y="167" text-anchor="middle" fill="#2e7d32" font-size="8.5" font-weight="bold">⛔ No salt substitutes (KCl)</text>
    <text x="806" y="181" text-anchor="middle" fill="#333" font-size="8.5">Na⁺ &lt;90 mmol/day (&lt;5 g NaCl)</text>
    <text x="806" y="194" text-anchor="middle" fill="#333" font-size="8.5">Avoid NSAIDs</text>
    <text x="806" y="207" text-anchor="middle" fill="#333" font-size="8.5">Avoid nephrotoxins</text>
    <text x="806" y="220" text-anchor="middle" fill="#333" font-size="8.5">SGLT2i for non-diabetic CKD</text>
    <text x="806" y="233" text-anchor="middle" fill="#333" font-size="8.5">Finerenone: CKD + T2DM</text>
    <text x="806" y="250" text-anchor="middle" fill="#333" font-size="8.5">BP target &lt;130/80 mmHg</text>

    <!-- Arrow down -->
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    <!-- DIAMOND: Is patient volume overloaded? -->
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    <text x="460" y="311" text-anchor="middle" fill="#5a3e00" font-size="11" font-weight="bold">VOLUME OVERLOADED?</text>
    <text x="460" y="327" text-anchor="middle" fill="#5a3e00" font-size="9">(edema, rising BP, weight gain, dyspnea)</text>

    <!-- YES → diuretic management -->
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    <text x="468" y="362" fill="#c62828" font-size="9" font-weight="bold">YES</text>

    <!-- Diuretic management in CKD -->
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    <text x="460" y="391" text-anchor="middle" fill="#004d40" font-size="10.5" font-weight="bold">CKD DIURETIC MANAGEMENT</text>
    <text x="460" y="407" text-anchor="middle" fill="#00695c" font-size="9.5" font-weight="bold">Step 1: Oral loop diuretic (furosemide/torsemide) — titrate dose upward</text>
    <text x="460" y="421" text-anchor="middle" fill="#333" font-size="9">Step 2: If resistance → add metolazone 2.5–10 mg PO (synergistic dual blockade)</text>
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  <div class="legend">
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    <div class="legend-item"><div class="legend-box" style="background:#ede7f6;border:1.5px solid #7b1fa2;"></div> CKD G4 (advanced)</div>
    <div class="legend-item"><div class="legend-box" style="background:#fce4ec;border:1.5px solid #c62828;"></div> CKD G5 / RRT</div>
    <div class="legend-item"><div class="legend-diamond" style="background:#fff9c4;border:1.5px solid #f9a825;"></div> Decision Point</div>
    <div class="legend-item"><div class="legend-box" style="background:#e8f5e9;border:1.5px solid #2e7d32;"></div> Success / Continue</div>
    <div class="legend-item"><div class="legend-box" style="background:#e0f2f1;border:1.5px solid #00695c;"></div> Treatment Action</div>
  </div>
</div>

<!-- ═══════════════════════════════════════════════════════════
     FLOWCHART 4 — SICK DAY RULES & AKI-ON-CKD
═══════════════════════════════════════════════════════════ -->
<div class="page">
  <div class="page-header hdr-orange">
    <span class="chart-num">Chart 4 of 4</span>
    <h1>Sick Day Rules — Preventing AKI-on-CKD During Acute Illness</h1>
    <div class="source">Sources: Comprehensive Clinical Nephrology 7th Ed. (KDIGO)<br>Goldman-Cecil Medicine · Harrison's 22E</div>
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    <text x="460" y="459" text-anchor="middle" fill="#b71c1c" font-size="10.5" font-weight="bold">🔴 AKI-ON-CKD — ESCALATE CARE</text>
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    <div class="legend-item"><div class="legend-box" style="background:#e8f5e9;border:1.5px solid #2e7d32;"></div> Safe / Continue</div>
    <div class="legend-item"><div class="legend-box" style="background:#fff3e0;border:1.5px solid #e65100;"></div> Caution / Action Needed</div>
    <div class="legend-item"><div class="legend-box" style="background:#e8f0fb;border:1.5px solid #1565a8;"></div> Monitoring / Restart Guide</div>
  </div>
</div>

</body>
</html>

Running Command

chromium --headless --disable-gpu --no-sandbox \ --print-to-pdf=/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_Flowcharts_Dr_Fahad.pdf \ --print-to-pdf-no-header \ --no-pdf-header-footer \ /home/daytona/workspace/aki-ckd-fluid/flowcharts.html 2>&1 | tail -5; echo "EXIT: $?"

Running Command

python3 -c " from pypdf import PdfReader r = PdfReader('/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_Flowcharts_Dr_Fahad.pdf') print(f'Pages: {len(r.pages)}') import os sz = os.path.getsize('/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_Flowcharts_Dr_Fahad.pdf') print(f'Size: {sz/1024:.0f} KB') "

Your flowcharts PDF is ready (7 pages, 421 KB, A4 landscape):

Fluid Management Flowcharts Dr Fahad

PDF Document · PDF

What's inside — 4 colour-coded flowcharts:

Chart	Title	Colour
1	AKI Fluid Resuscitation — When & How to Give Fluids	Blue
2	AKI Fluid Removal — Diuretic Escalation & RRT Decision	Teal
3	CKD Chronic Fluid Management — Stage-Based Approach	Purple
4	Sick Day Rules — Preventing AKI-on-CKD During Acute Illness	Orange/Red

Each chart includes decision diamonds, colour-coded action boxes (green = safe/continue, red = stop/urgent, yellow = caution), arrow labels (YES/NO), and a legend at the bottom.

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Successfully replaced 1 instance(s) of the string in '/home/daytona/workspace/aki-ckd-fluid/fluid_management.html'

Searching Content

"Dr. Fahad" in ~/aki-ckd-fluid

Running Command

chromium --headless --disable-gpu --no-sandbox \ --print-to-pdf=/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_AKI_CKD.pdf \ --print-to-pdf-no-header --no-pdf-header-footer \ /home/daytona/workspace/aki-ckd-fluid/fluid_management.html 2>&1 | grep -E "bytes written|ERROR" | tail -3 chromium --headless --disable-gpu --no-sandbox \ --print-to-pdf=/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_Flowcharts.pdf \ --print-to-pdf-no-header --no-pdf-header-footer \ /home/daytona/workspace/aki-ckd-fluid/flowcharts.html 2>&1 | grep -E "bytes written|ERROR" | tail -3 echo "DONE"

Both PDFs regenerated. Here are your updated download links:

Full Reference PDF (21 pages):

Fluid Management AKI CKD

PDF Document · PDF

Flowcharts PDF (4 charts, landscape):

Fluid Management Flowcharts

PDF Document · PDF

Name, date, and time have been removed from both. The cover of the full reference now simply reads "Prepared June 2026."

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Writing File

~/aki-ckd-fluid/cases.html

<!DOCTYPE html>
<html lang="en">
<head>
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<title>Clinical Case Scenarios — Fluid Management in AKI &amp; CKD</title>
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<body>

<!-- COVER -->
<div class="cover">
  <div class="badge">Clinical Case Scenarios</div>
  <h1>Fluid Management<br>in AKI &amp; CKD</h1>
  <h2>5 Case-Based Scenarios with Worked Answers</h2>
  <div class="divider"></div>
  <div class="desc">Each case presents a realistic clinical vignette with staged questions, followed by detailed evidence-based answers referenced to current guidelines and textbooks.</div>
  <div class="cases-grid">
    <div class="case-pill"><strong>Case 1</strong> Prerenal AKI — Septic Shock</div>
    <div class="case-pill"><strong>Case 2</strong> Oliguric ATN — Fluid Overload</div>
    <div class="case-pill"><strong>Case 3</strong> Rhabdomyolysis — Crush Injury</div>
    <div class="case-pill"><strong>Case 4</strong> CKD G4 — Acute Illness</div>
    <div class="case-pill"><strong>Case 5</strong> Abdominal Compartment Syndrome</div>
  </div>
  <div class="src">
    Sources: KDIGO 2026 · Brenner &amp; Rector's The Kidney · Harrison's 22E<br>
    Comprehensive Clinical Nephrology 7th Ed. · Goldman-Cecil Medicine · Tintinalli's EM
  </div>
</div>

<!-- ═══════════════════════════════════════════
     CASE 1
═══════════════════════════════════════════ -->
<div class="case-page">
  <div class="case-header hdr-c1">
    <div class="case-tag">Case 1 of 5</div>
    <h2>The Septic Patient with Declining Urine Output</h2>
    <div class="case-meta">
      <span class="tag tag-red">Prerenal AKI</span>
      <span class="tag tag-red">Septic Shock</span>
      <span class="tag tag-blue">Fluid Resuscitation</span>
      <span class="tag tag-blue">KDIGO 2026</span>
    </div>
  </div>

  <div class="vignette">
    <div class="vignette-title">Clinical Presentation</div>
    <p>A <strong>62-year-old man</strong> with a history of type 2 diabetes presents to the emergency department with a 3-day history of fever, productive cough, and confusion. His wife reports that he has been drinking minimally and his urine output has been very low since yesterday.</p>
    <p><strong>Background medications:</strong> Metformin 1g BD, ramipril 5mg OD, furosemide 40mg OD.</p>
    <div class="vitals">
      <div class="vital-box"><div class="vl">BP</div><div class="vv" style="color:#c62828">82/50</div></div>
      <div class="vital-box"><div class="vl">HR</div><div class="vv" style="color:#c62828">118</div></div>
      <div class="vital-box"><div class="vl">RR</div><div class="vv" style="color:#c62828">24</div></div>
      <div class="vital-box"><div class="vl">SpO₂</div><div class="vv">94%</div></div>
    </div>
    <p><strong>Examination:</strong> Confused (GCS 13), dry mucous membranes, JVP not visible, no peripheral oedema, lung crackles at right base. Urine output on catheterisation: <strong>15 mL in last 2 hours</strong>.</p>
    <div class="labs-grid">
      <div class="lab-item abnormal"><div class="ln">Creatinine</div><div class="lv">312 μmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Urea</div><div class="lv">28 mmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">K⁺</div><div class="lv">5.8 mEq/L</div></div>
      <div class="lab-item"><div class="ln">Na⁺</div><div class="lv">134 mEq/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Bicarbonate</div><div class="lv">16 mmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">pH (VBG)</div><div class="lv">7.26</div></div>
      <div class="lab-item abnormal"><div class="ln">Lactate</div><div class="lv">4.2 mmol/L</div></div>
      <div class="lab-item"><div class="ln">Urine Na⁺</div><div class="lv">12 mEq/L</div></div>
      <div class="lab-item"><div class="ln">FENa</div><div class="lv">0.6%</div></div>
    </div>
    <p><strong>IVC ultrasound:</strong> IVC diameter 1.4 cm with &gt;70% inspiratory collapse.</p>
  </div>

  <div class="questions">
    <div class="question-box">
      <div class="qnum">Question 1</div>
      <p>What is the likely diagnosis and AKI stage? What do the urine indices and IVC findings tell you?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 2</div>
      <p>What is your immediate fluid management plan? Specify the fluid type, volume, and rate. Which of his regular medications should be held and why?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 3</div>
      <p>After 2 litres of fluid over 2 hours, BP is 94/60, HR 104, and urine output has improved to 45 mL/h. What phase of fluid therapy are you now in, and what is your next step?</p>
    </div>
  </div>

  <hr class="section-divider">

  <div class="answers">
    <div class="answer-section">
      <div class="anum">Answer 1</div>
      <h4>Diagnosis: Prerenal AKI (KDIGO Stage 2) secondary to septic shock from community-acquired pneumonia</h4>
      <p><strong>AKI staging:</strong> Baseline creatinine assumed ~80 μmol/L (diabetic male). Current creatinine 312 μmol/L = approximately 3.9× baseline → <span class="highlight">KDIGO Stage 3</span>. Urine output 15 mL/2h = 0.06 mL/kg/h → Stage 3 by urine output criteria.</p>
      <p><strong>Urine indices:</strong> UNa 12 mEq/L (&lt;20) and FENa 0.6% (&lt;1%) indicate a <em>functional/prerenal</em> state — the tubules are intact and avidly reabsorbing sodium in response to perceived hypovolaemia. This argues against established ATN.</p>
      <p><strong>IVC:</strong> 1.4 cm with &gt;70% collapse = hypovolaemia confirmed. Volume status assessment is consistent with depletion. This patient needs fluid, not restriction.</p>
      <p class="citation">Tintinalli's EM p. 610; Brenner &amp; Rector's p. 2814</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 2</div>
      <h4>Immediate fluid management — Phase 1: Rescue</h4>
      <ul>
        <li><strong>Fluid type:</strong> Balanced crystalloid (Plasma-Lyte or Lactated Ringer's) — preferred over 0.9% saline per KDIGO 2026 Grade 1B. Normal saline risks hyperchloraemic acidosis, worsening his already low bicarbonate.</li>
        <li><strong>Volume and rate:</strong> 500 mL bolus over ≤15 minutes. Reassess BP, HR, UO, and IVC after each bolus. In septic shock, initial target is 30 mL/kg within 3 hours (Surviving Sepsis) → approximately 2.1 L for a 70 kg man.</li>
        <li><strong>If MAP remains &lt;65 mmHg despite fluids:</strong> Add norepinephrine — do not keep giving fluid indefinitely.</li>
      </ul>
      <p><strong>Medications to HOLD immediately (sick day rules, KDIGO):</strong></p>
      <ul>
        <li><strong>Ramipril</strong> — ACE inhibitor drops efferent arteriolar tone, worsens prerenal AKI and causes hyperkalemia (K⁺ already 5.8)</li>
        <li><strong>Furosemide</strong> — diuretic will worsen dehydration and hypotension; no role when patient is hypovolaemic</li>
        <li><strong>Metformin</strong> — AKI + lactic acidosis (lactate 4.2) = immediate stop; lactic acidosis risk at low GFR</li>
      </ul>
      <p class="citation">KDIGO 2026 Rec 3.1.2 (Grade 1B); Comprehensive Clinical Nephrology 7th Ed. p. 3791</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 3</div>
      <h4>Phase 2: Optimization — test fluid responsiveness before giving more</h4>
      <p>You are now in <strong>Phase 2 (Optimization)</strong>. Perfusion has partially restored (BP improving, UO responding) but the patient is not yet fully stable. Do not give further free boluses without testing responsiveness.</p>
      <ul>
        <li>Perform a <strong>fluid challenge</strong>: 250 mL or 3 mL/kg over 5–10 minutes with stroke volume monitoring (or passive leg raise test)</li>
        <li>If SV rises ≥10–15% → fluid responsive → give another cautious challenge</li>
        <li>If SV does not rise → stop fluids; consider vasopressors (norepinephrine) to maintain MAP ≥65 mmHg</li>
        <li>Target Phase 3 (neutral balance) once haemodynamically stable: fluid in = UO + ~500–800 mL insensible losses</li>
        <li>Recheck creatinine, K⁺, and pH at 6h — if K⁺ worsening or pH ≤7.1, reassess for RRT indications</li>
      </ul>
      <p class="citation">Comprehensive Clinical Nephrology 7th Ed. p. 1002; KDIGO 2026 Practice Point 3.2.1</p>
    </div>

    <div class="key-learning">
      <div class="kl-title">Key Learning Points — Case 1</div>
      <ul>
        <li>Low UNa (&lt;20) + FENa &lt;1% + collapsed IVC = classic prerenal AKI → give fluids urgently</li>
        <li>Balanced crystalloids are preferred over 0.9% saline in AKI (KDIGO 2026, Grade 1B)</li>
        <li>Initial sepsis resuscitation: 30 mL/kg within 3 hours, then assess responsiveness</li>
        <li>Hold ACEi, diuretics, metformin immediately in acute illness with AKI (sick day rules)</li>
        <li>After initial rescue, switch to fluid challenges with SV monitoring — do not keep bolusing blindly</li>
      </ul>
    </div>
  </div>
</div>

<!-- ═══════════════════════════════════════════
     CASE 2
═══════════════════════════════════════════ -->
<div class="case-page">
  <div class="case-header hdr-c2">
    <div class="case-tag">Case 2 of 5</div>
    <h2>The Oliguric Post-Operative Patient Who Won't Make Urine</h2>
    <div class="case-meta">
      <span class="tag tag-green">Intrinsic AKI / ATN</span>
      <span class="tag tag-red">Fluid Overload</span>
      <span class="tag tag-blue">Diuretic Escalation</span>
      <span class="tag tag-purple">RRT Decision</span>
    </div>
  </div>

  <div class="vignette">
    <div class="vignette-title">Clinical Presentation</div>
    <p>A <strong>58-year-old woman</strong> is on Day 3 post elective major bowel resection. Intraoperatively she received 6 litres of 0.9% normal saline. She has been oliguric since Day 1 despite being given a further 3 litres of saline over the past 48 hours by the surgical team.</p>
    <p><strong>Background:</strong> No prior kidney disease. Pre-operative creatinine was 72 μmol/L.</p>
    <div class="vitals">
      <div class="vital-box"><div class="vl">BP</div><div class="vv">148/90</div></div>
      <div class="vital-box"><div class="vl">HR</div><div class="vv">96</div></div>
      <div class="vital-box"><div class="vl">Weight</div><div class="vv" style="color:#c62828">+7 kg</div></div>
      <div class="vital-box"><div class="vl">SpO₂</div><div class="vv" style="color:#c62828">91%</div></div>
    </div>
    <p><strong>Examination:</strong> Bilateral pitting oedema to mid-shin, bibasal crackles on auscultation, JVP elevated at 6 cm above sternal angle, tense abdomen. IVC diameter 2.6 cm with &lt;20% respiratory variation. UO: 12 mL/h for past 8 hours.</p>
    <div class="labs-grid">
      <div class="lab-item abnormal"><div class="ln">Creatinine</div><div class="lv">398 μmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">K⁺</div><div class="lv">6.1 mEq/L</div></div>
      <div class="lab-item abnormal"><div class="ln">pH</div><div class="lv">7.20</div></div>
      <div class="lab-item abnormal"><div class="ln">Bicarbonate</div><div class="lv">12 mmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Chloride</div><div class="lv">118 mmol/L</div></div>
      <div class="lab-item"><div class="ln">Urine Na⁺</div><div class="lv">58 mEq/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Bladder pressure</div><div class="lv">16 mmHg</div></div>
      <div class="lab-item"><div class="ln">CXR</div><div class="lv">Bilateral infiltrates</div></div>
      <div class="lab-item abnormal"><div class="ln">ECG</div><div class="lv">Peaked T waves</div></div>
    </div>
  </div>

  <div class="questions">
    <div class="question-box">
      <div class="qnum">Question 1</div>
      <p>What type of AKI does this patient have? What does the urine Na⁺ of 58 mEq/L indicate? Why was giving more saline the wrong management?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 2</div>
      <p>The bladder pressure is 16 mmHg. What is this finding, how did it develop, and what does it do to the kidneys?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 3</div>
      <p>Does this patient have any indications for urgent RRT? If you were to try diuretics first, what is your step-by-step plan and how will you assess response?</p>
    </div>
  </div>

  <hr class="section-divider">

  <div class="answers">
    <div class="answer-section">
      <div class="anum">Answer 1</div>
      <h4>Intrinsic AKI (Acute Tubular Necrosis) with iatrogenic fluid overload</h4>
      <p><strong>AKI type:</strong> Creatinine 398 from baseline 72 = 5.5× = KDIGO Stage 3. UNa 58 mEq/L (&gt;40) indicates tubular damage — the kidneys can no longer reabsorb sodium efficiently. This is <em>NOT</em> prerenal; giving more fluid is harmful.</p>
      <p><strong>Why more saline was wrong:</strong> (1) Tubular injury was present; volume cannot restore GFR in intrinsic AKI. (2) 0.9% saline caused hyperchloraemic metabolic acidosis (Cl⁻ 118) — exactly the pattern seen when chloride-rich solutions are used (SPLIT trial context). (3) Excess fluid created the +7 kg overload, bilateral pulmonary infiltrates (fluid in lungs), and elevated bladder pressure. Fluid overload in AKI independently increases mortality.</p>
      <p class="citation">Brenner &amp; Rector's p. 2814; KDIGO 2026 Rec 3.1.2</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 2</div>
      <h4>Intraabdominal Hypertension (IAH) — bladder pressure 16 mmHg</h4>
      <p><strong>Definition:</strong> IAP &gt;12 mmHg = IAH. This patient has IAH (16 mmHg) but not yet full Abdominal Compartment Syndrome (requires IAP &gt;20 + organ dysfunction — though AKI is present).</p>
      <p><strong>How it developed:</strong> Massive fluid overload → bowel wall oedema + ascites → raised intraabdominal pressure.</p>
      <p><strong>Mechanism of renal injury:</strong> IAH → IVC compression → ↓ venous return → ↓ cardiac output → ↑ RAAS and sympathetic tone → renal vasoconstriction → functional prerenal state on top of intrinsic AKI → worsened oliguria. This is why bladder pressure must be measured in any post-operative oliguric patient who has received large volumes.</p>
      <p class="citation">Brenner &amp; Rector's p. 2814</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 3</div>
      <h4>RRT indications present — but a brief diuretic trial is reasonable</h4>
      <p><strong>RRT indications present:</strong></p>
      <ul>
        <li>pH 7.20 — borderline (&lt;7.1 = emergent; 7.20 = urgent — watch closely)</li>
        <li>K⁺ 6.1 + peaked T waves on ECG = <span class="highlight">emergent RRT indication</span></li>
        <li>Volume overload refractory to current management with pulmonary infiltrates</li>
      </ul>
      <p><strong>Immediate action for K⁺:</strong> IV calcium gluconate 10 mL 10% (membrane stabilisation), insulin-dextrose (shift K⁺ intracellularly), sodium bicarbonate if acidosis contributing — all as bridge to RRT.</p>
      <p><strong>Diuretic trial (KDIGO 2026 escalation pathway):</strong></p>
      <ul>
        <li><strong>Step 1:</strong> Furosemide 1.5 mg/kg IV bolus (patient likely had prior furosemide) → monitor UO over 2 hours</li>
        <li><strong>Goal:</strong> &gt;200 mL UO in 2 hours (Furosemide Stress Test criteria)</li>
        <li><strong>If no response:</strong> Double dose (160–200 mg IV bolus every 6–12h) + add metolazone</li>
        <li><strong>If still no response:</strong> Initiate RRT — the ECG changes alone justify urgent IHD or CRRT</li>
      </ul>
      <p><strong>RRT modality:</strong> Patient is haemodynamically borderline (BP 148/90, HR 96). Start with IHD if stable enough, otherwise CRRT (CVVHDF). Target effluent dose 20–25 mL/kg/h. Titrate net ultrafiltration rate gently — aggressive UF worsens outcomes (2025 meta-analysis, PMID 39889501).</p>
      <p class="citation">Harrison's 22E; KDIGO 2026 Table 22; Tintinalli's EM p. 610</p>
    </div>

    <div class="key-learning">
      <div class="kl-title">Key Learning Points — Case 2</div>
      <ul>
        <li>UNa &gt;40 = tubular damage (ATN) — more fluid will NOT help and will cause overload</li>
        <li>0.9% saline in large volumes causes hyperchloraemic acidosis — use balanced crystalloids</li>
        <li>Always check bladder pressure in oliguric post-operative patients given large volumes</li>
        <li>ECG-confirmed hyperkalemia = emergent RRT indication regardless of other parameters</li>
        <li>Diuretics in AKI treat overload only — they do not improve kidney recovery or reduce mortality</li>
        <li>Titrate CRRT ultrafiltration rate carefully — aggressive UF is independently associated with harm</li>
      </ul>
    </div>
  </div>
</div>

<!-- ═══════════════════════════════════════════
     CASE 3
═══════════════════════════════════════════ -->
<div class="case-page">
  <div class="case-header hdr-c3">
    <div class="case-tag">Case 3 of 5</div>
    <h2>The Crush Injury — Rhabdomyolysis AKI</h2>
    <div class="case-meta">
      <span class="tag tag-purple">Rhabdomyolysis</span>
      <span class="tag tag-red">AKI — High Volume Resuscitation</span>
      <span class="tag tag-blue">Special Fluid Protocol</span>
    </div>
  </div>

  <div class="vignette">
    <div class="vignette-title">Clinical Presentation</div>
    <p>A <strong>28-year-old construction worker</strong> is brought to the emergency department 2 hours after being trapped under a collapsed wall for approximately 90 minutes. On extrication he was conscious but in severe pain. He reports no significant past medical history.</p>
    <div class="vitals">
      <div class="vital-box"><div class="vl">BP</div><div class="vv" style="color:#c62828">90/60</div></div>
      <div class="vital-box"><div class="vl">HR</div><div class="vv" style="color:#c62828">124</div></div>
      <div class="vital-box"><div class="vl">Temp</div><div class="vv">37.2°C</div></div>
      <div class="vital-box"><div class="vl">UO</div><div class="vv" style="color:#c62828">None yet</div></div>
    </div>
    <p><strong>Examination:</strong> Grossly swollen right lower limb, tense right thigh compartment. Dark brown ("cola-coloured") urine obtained on catheterisation — 30 mL total. No peripheral oedema. IVC appears collapsed.</p>
    <div class="labs-grid">
      <div class="lab-item abnormal"><div class="ln">CK</div><div class="lv">84,000 U/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Creatinine</div><div class="lv">264 μmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">K⁺</div><div class="lv">6.4 mEq/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Phosphate</div><div class="lv">2.8 mmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Calcium</div><div class="lv">1.7 mmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">pH</div><div class="lv">7.18</div></div>
      <div class="lab-item abnormal"><div class="ln">Urine dipstick</div><div class="lv">Blood +++ / RBC nil</div></div>
      <div class="lab-item abnormal"><div class="ln">Myoglobin (urine)</div><div class="lv">Strongly positive</div></div>
      <div class="lab-item"><div class="ln">ECG</div><div class="lv">Peaked T waves</div></div>
    </div>
  </div>

  <div class="questions">
    <div class="question-box">
      <div class="qnum">Question 1</div>
      <p>What is the diagnosis? Explain the mechanism by which rhabdomyolysis causes AKI. What does "blood on dipstick but no RBCs on microscopy" mean?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 2</div>
      <p>Describe your complete fluid resuscitation strategy — fluid type, volume target, rate, and urine output goal. Should you use alkaline fluids? What is the risk?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 3</div>
      <p>At 6 hours, despite 5 L of fluids, urine output remains 25 mL/h and urine remains dark. K⁺ is now 6.8 with widened QRS on ECG. What do you do?</p>
    </div>
  </div>

  <hr class="section-divider">

  <div class="answers">
    <div class="answer-section">
      <div class="anum">Answer 1</div>
      <h4>Rhabdomyolysis-induced AKI (KDIGO Stage 2–3)</h4>
      <p><strong>Mechanism of AKI in rhabdomyolysis — three pathways:</strong></p>
      <ul>
        <li><strong>Tubular obstruction:</strong> Myoglobin precipitates as casts in the distal tubule and collecting duct (especially in acidic urine), causing physical obstruction → oliguria</li>
        <li><strong>Direct tubular toxicity:</strong> Myoglobin is broken down to ferrihemate, which generates reactive oxygen species → direct proximal tubular cell injury</li>
        <li><strong>Renal vasoconstriction:</strong> Hypovolaemia (fluid sequestered into damaged muscle) + myoglobin-induced nitric oxide scavenging → vasoconstriction → ischaemic ATN</li>
      </ul>
      <p><strong>"Blood +++ on dipstick, no RBCs on microscopy":</strong> Haem from myoglobin (and haemoglobin) cross-reacts with the dipstick peroxidase reaction, giving a false-positive blood result. No red cells are present — this is myoglobinuria. This is a classic diagnostic clue for rhabdomyolysis.</p>
      <p class="citation">Harrison's 22E p. 2427; Rosen's EM p. 4455</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 2</div>
      <h4>Rhabdomyolysis fluid protocol — aggressive early resuscitation</h4>
      <ul>
        <li><strong>Start immediately:</strong> Balanced crystalloid or 0.9% saline IV at very high rate</li>
        <li><strong>Volume:</strong> Up to <span class="highlight">10 L in the first 24 hours</span> — titrated to urine output response</li>
        <li><strong>Urine output target:</strong> <span class="highlight">200–300 mL/h</span> — this is the key endpoint. High flow flushes myoglobin casts before they precipitate</li>
        <li><strong>Rate:</strong> Initial bolus 500 mL–1 L over 15–30 min, then continuous high-rate infusion (e.g., 500–1000 mL/h initially) titrated to UO target</li>
      </ul>
      <p><strong>Alkaline fluids:</strong> Adding sodium bicarbonate (75 mmol/L NaHCO₃ in 0.45% saline) alkalinises urine, which prevents myoglobin precipitation (myoglobin is soluble in alkaline urine) and may reduce tubular toxicity.</p>
      <p><strong>Risk:</strong> This patient already has hypocalcaemia (Ca²⁺ 1.7) — alkalosis drives further calcium into cells → worsening tetany/arrhythmia risk. Use alkaline fluids cautiously; monitor calcium closely. If calcium is very low, use plain balanced crystalloid instead.</p>
      <p><strong>Also monitor:</strong> Calcium, phosphate, and potassium every 2–4 hours. Hyperphosphataemia causes calcium precipitation in damaged muscle — correct only if symptomatic.</p>
      <p class="citation">Harrison's 22E p. 2427; Tintinalli's EM</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 3</div>
      <h4>Widened QRS + K⁺ 6.8 = Emergent RRT Indication</h4>
      <p><strong>Immediate steps (bridge to RRT):</strong></p>
      <ul>
        <li><strong>IV calcium gluconate 10 mL of 10%</strong> over 5–10 min — membrane stabilisation (does not lower K⁺, buys time)</li>
        <li><strong>Insulin 10 units + 50 mL of 50% dextrose IV</strong> — shifts K⁺ intracellularly within 30 min</li>
        <li><strong>Sodium bicarbonate</strong> 50–100 mmol IV — careful given hypocalcaemia; only if pH remains severely acidotic</li>
        <li><strong>Salbutamol nebuliser</strong> 10–20 mg — additional K⁺ shift (but less reliable)</li>
      </ul>
      <p><strong>RRT:</strong> This patient requires urgent RRT — widened QRS is a life-threatening ECG change. Up to <span class="highlight">20% of rhabdomyolysis-AKI patients require RRT</span>. Choose IHD if haemodynamically stable for rapid K⁺ clearance, or CRRT if borderline.</p>
      <p><strong>Diuretics:</strong> Furosemide may be tried if UO remains low — target UO 200–300 mL/h. However with established ATN and hyperkalaemic emergency, RRT takes priority. Mannitol has no role.</p>
      <p class="citation">Rosen's EM; Harrison's 22E; Comprehensive Clinical Nephrology 7th Ed.</p>
    </div>

    <div class="key-learning">
      <div class="kl-title">Key Learning Points — Case 3</div>
      <ul>
        <li>Rhabdomyolysis AKI: 3 mechanisms — cast obstruction, direct tubular toxicity, renal vasoconstriction</li>
        <li>Dipstick blood + no RBCs on microscopy = myoglobinuria (classic clue)</li>
        <li>Fluid target: up to 10 L/day; goal UO 200–300 mL/h — this is far higher than routine AKI maintenance</li>
        <li>Alkaline fluids prevent cast precipitation but risk worsening hypocalcaemia — check Ca²⁺ before using</li>
        <li>ECG changes with hyperkalemia = emergent RRT; bridge with calcium gluconate + insulin-dextrose</li>
        <li>20% of rhabdomyolysis-AKI patients will require RRT</li>
      </ul>
    </div>
  </div>
</div>

<!-- ═══════════════════════════════════════════
     CASE 4
═══════════════════════════════════════════ -->
<div class="case-page">
  <div class="case-header hdr-c4">
    <div class="case-tag">Case 4 of 5</div>
    <h2>The CKD Patient Who Stopped Eating During a Viral Illness</h2>
    <div class="case-meta">
      <span class="tag tag-orange">CKD G4</span>
      <span class="tag tag-red">AKI-on-CKD</span>
      <span class="tag tag-orange">Sick Day Rules</span>
      <span class="tag tag-blue">Drug Management</span>
    </div>
  </div>

  <div class="vignette">
    <div class="vignette-title">Clinical Presentation</div>
    <p>A <strong>71-year-old woman</strong> with known CKD G4 (baseline eGFR 22 mL/min/1.73 m²) and hypertension presents to clinic with a 5-day history of gastroenteritis — vomiting twice daily and loose stools 4–5 times daily. She has been unable to eat or drink well. She continued all her medications as normal throughout.</p>
    <p><strong>Background medications:</strong> Ramipril 10 mg OD, furosemide 80 mg OD, amlodipine 10 mg OD, spironolactone 25 mg OD, atorvastatin 40 mg OD.</p>
    <div class="vitals">
      <div class="vital-box"><div class="vl">BP</div><div class="vv" style="color:#c62828">88/54</div></div>
      <div class="vital-box"><div class="vl">HR</div><div class="vv" style="color:#c62828">106</div></div>
      <div class="vital-box"><div class="vl">Weight</div><div class="vv" style="color:#c62828">−3.2 kg</div></div>
      <div class="vital-box"><div class="vl">UO</div><div class="vv">Reduced</div></div>
    </div>
    <p><strong>Examination:</strong> Dry tongue, reduced skin turgor, no peripheral oedema, JVP low. IVC appears narrow with good inspiratory collapse.</p>
    <div class="labs-grid">
      <div class="lab-item abnormal"><div class="ln">Creatinine</div><div class="lv">486 μmol/L</div></div>
      <div class="lab-item"><div class="ln">Baseline Cr</div><div class="lv">198 μmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">eGFR</div><div class="lv">9 mL/min</div></div>
      <div class="lab-item abnormal"><div class="ln">K⁺</div><div class="lv">6.6 mEq/L</div></div>
      <div class="lab-item abnormal"><div class="ln">pH</div><div class="lv">7.22</div></div>
      <div class="lab-item abnormal"><div class="ln">Bicarbonate</div><div class="lv">14 mmol/L</div></div>
      <div class="lab-item"><div class="ln">Urine Na⁺</div><div class="lv">8 mEq/L</div></div>
      <div class="lab-item"><div class="ln">ECG</div><div class="lv">Tall peaked T waves</div></div>
      <div class="lab-item"><div class="ln">CXR</div><div class="lv">Clear</div></div>
    </div>
  </div>

  <div class="questions">
    <div class="question-box">
      <div class="qnum">Question 1</div>
      <p>Which of her medications contributed to this presentation and how? What is the principle underpinning "sick day rules" in CKD?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 2</div>
      <p>What is your acute fluid management plan? She is vomiting — can she take oral fluids? What IV fluid would you choose and why?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 3</div>
      <p>After 24 hours of appropriate management, creatinine has improved to 280 μmol/L, K⁺ is 5.2, and she is drinking normally. How and when do you restart her medications?</p>
    </div>
  </div>

  <hr class="section-divider">

  <div class="answers">
    <div class="answer-section">
      <div class="anum">Answer 1</div>
      <h4>Multiple medications contributed — a dangerous combination in sick CKD</h4>
      <ul>
        <li><strong>Furosemide (loop diuretic):</strong> Continued during vomiting and diarrhoea → profound dehydration and worsened hypovolaemia → precipitated prerenal AKI-on-CKD</li>
        <li><strong>Ramipril (ACEi):</strong> Drops efferent arteriolar tone → reduced GFR in the setting of low perfusion pressure. Also promotes hyperkalaemia — K⁺ now 6.6</li>
        <li><strong>Spironolactone (aldosterone antagonist):</strong> K⁺-sparing — synergistic with ACEi in causing dangerous hyperkalaemia (K⁺ 6.6 + ECG changes)</li>
      </ul>
      <p><strong>Sick day rule principle:</strong> CKD patients (eGFR &lt;60) have limited renal reserve. During acute illness with fluid losses, GFR can drop precipitously. Drugs that reduce renal perfusion (ACEi, ARBs, diuretics, NSAIDs) or accumulate at low GFR (metformin, lithium, digoxin) must be held to prevent AKI-on-CKD and life-threatening electrolyte disturbances. (KDIGO recommendation — Comprehensive Clinical Nephrology 7th Ed. p. 3791)</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 2</div>
      <h4>IV fluid resuscitation — cannot rely on oral route acutely</h4>
      <p><strong>Oral rehydration:</strong> KDIGO 2026 recommends oral rehydration as first-line for mild-moderate dehydration. However, this patient is actively vomiting → oral route unreliable → IV fluids required.</p>
      <p><strong>IV fluid choice:</strong> Balanced crystalloid (Plasma-Lyte or Lactated Ringer's). Avoid 0.9% saline — she already has a metabolic acidosis (HCO₃ 14) and normal saline would worsen hyperchloraemic acidosis.</p>
      <p><strong>Volume and rate:</strong> Start with 500 mL IV bolus over 15–30 minutes → reassess BP, HR, and IVC. Continue at 250 mL/h and titrate to clinical response (BP improvement, UO &gt;0.5 mL/kg/h). Do not overload — this patient has chronic CKD with impaired fluid excretion; once hypovolaemia corrects, excess fluid will accumulate rapidly.</p>
      <p><strong>For K⁺ 6.6 + ECG changes:</strong> Do NOT use potassium-containing fluids (e.g., Lactated Ringer's contains 4 mEq/L K⁺ — use Plasma-Lyte or 0.9% saline for initial emergency bolus). Treat hyperkalaemia in parallel with calcium gluconate and insulin-dextrose.</p>
      <p class="citation">KDIGO 2026 Practice Point; Harrison's 22E</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 3</div>
      <h4>Restarting medications — careful, sequential, with monitoring</h4>
      <p><strong>General rule:</strong> Restart withheld drugs only when the patient has <em>fully recovered</em>: illness resolved, tolerating oral fluids normally, creatinine back to (or near) baseline, electrolytes stable.</p>
      <ul>
        <li><strong>Amlodipine:</strong> Can restart immediately — no renal effects; not nephrotoxic</li>
        <li><strong>Statin:</strong> Restart immediately — no acute renal concerns</li>
        <li><strong>Furosemide:</strong> Restart cautiously at lower dose (40 mg OD) once creatinine near baseline and patient is euvolaemic and drinking. Check weight before restarting.</li>
        <li><strong>Ramipril:</strong> Restart at lower dose (5 mg) once creatinine stable for 48–72h. Recheck creatinine and K⁺ within <span class="highlight">1–2 weeks</span> of restarting</li>
        <li><strong>Spironolactone:</strong> Restart last and at lower dose — highest hyperkalaemia risk. Only once K⁺ &lt;5.0 and creatinine stable. Consider whether it is still indicated.</li>
        <li><strong>Do NOT restart all medications on the same day</strong> — stagger restarts to identify which drug causes any deterioration</li>
      </ul>
      <p><strong>Follow-up:</strong> Arrange nephrology review — eGFR 9 suggests she may be approaching dialysis threshold (G5). This episode of AKI-on-CKD may accelerate progression. Discuss RRT planning.</p>
      <p class="citation">Comprehensive Clinical Nephrology 7th Ed. p. 3791; Goldman-Cecil Medicine</p>
    </div>

    <div class="key-learning">
      <div class="kl-title">Key Learning Points — Case 4</div>
      <ul>
        <li>ACEi + diuretic + aldosterone antagonist continued during vomiting/diarrhoea = a dangerous triple combination in CKD</li>
        <li>Sick day rules must be actively taught to every CKD patient — hold ACEi, ARBs, diuretics, NSAIDs, spironolactone, metformin during illness</li>
        <li>In vomiting patients, IV balanced crystalloid is required — oral rehydration is not reliable</li>
        <li>Avoid Lactated Ringer's (contains K⁺) when hyperkalaemia is present — use Plasma-Lyte or cautious saline</li>
        <li>Restart medications one at a time after recovery; recheck renal function and electrolytes 1–2 weeks post-restart</li>
        <li>Each AKI-on-CKD episode may permanently accelerate CKD progression — nephrology follow-up is mandatory</li>
      </ul>
    </div>
  </div>
</div>

<!-- ═══════════════════════════════════════════
     CASE 5
═══════════════════════════════════════════ -->
<div class="case-page">
  <div class="case-header hdr-c5">
    <div class="case-tag">Case 5 of 5</div>
    <h2>The ICU Patient with Progressive Oliguria After Resuscitation</h2>
    <div class="case-meta">
      <span class="tag" style="background:#e0f7fa;color:#006064">Abdominal Compartment Syndrome</span>
      <span class="tag tag-red">Fluid Overload</span>
      <span class="tag tag-purple">RRT Escalation</span>
      <span class="tag tag-blue">Phase 4 De-escalation</span>
    </div>
  </div>

  <div class="vignette">
    <div class="vignette-title">Clinical Presentation</div>
    <p>A <strong>45-year-old man</strong> with no significant past history was admitted 4 days ago with perforated sigmoid diverticulitis and underwent emergency sigmoid resection with Hartmann's procedure. Post-operatively he was managed in ICU. Over 4 days he has received a cumulative total of <strong>18 litres of IV fluid</strong> in resuscitation and maintenance.</p>
    <p>Despite initial improvement, urine output has progressively declined over the last 18 hours to <strong>8 mL/h</strong>, despite IV furosemide 200 mg given 6 hours ago with minimal response (UO 60 mL over 2 hours).</p>
    <div class="vitals">
      <div class="vital-box"><div class="vl">BP</div><div class="vv">132/78</div></div>
      <div class="vital-box"><div class="vl">HR</div><div class="vv">102</div></div>
      <div class="vital-box"><div class="vl">Weight</div><div class="vv" style="color:#c62828">+11 kg</div></div>
      <div class="vital-box"><div class="vl">CVP</div><div class="vv" style="color:#c62828">18 cmH₂O</div></div>
    </div>
    <p><strong>Examination:</strong> Grossly oedematous — facial oedema, limb oedema, massively distended tense abdomen. IVC 2.8 cm, &lt;10% respiratory variation. SpO₂ 93% on 40% FiO₂.</p>
    <div class="labs-grid">
      <div class="lab-item abnormal"><div class="ln">Creatinine</div><div class="lv">420 μmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">K⁺</div><div class="lv">5.9 mEq/L</div></div>
      <div class="lab-item abnormal"><div class="ln">pH</div><div class="lv">7.24</div></div>
      <div class="lab-item abnormal"><div class="ln">Bicarbonate</div><div class="lv">13 mmol/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Bladder pressure</div><div class="lv">24 mmHg</div></div>
      <div class="lab-item"><div class="ln">Urine Na⁺</div><div class="lv">52 mEq/L</div></div>
      <div class="lab-item abnormal"><div class="ln">Lactate</div><div class="lv">2.8 mmol/L</div></div>
      <div class="lab-item"><div class="ln">CXR</div><div class="lv">Bilateral infiltrates</div></div>
      <div class="lab-item"><div class="ln">Furosemide response</div><div class="lv">60 mL / 2h (FAIL)</div></div>
    </div>
  </div>

  <div class="questions">
    <div class="question-box">
      <div class="qnum">Question 1</div>
      <p>The bladder pressure is 24 mmHg with declining UO despite apparent haemodynamic stability. What diagnosis does this suggest, and why is this patient's oliguria paradoxical?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 2</div>
      <p>The furosemide stress test result is 60 mL in 2 hours — interpret this. What does it tell you about prognosis and next steps?</p>
    </div>
    <div class="question-box">
      <div class="qnum">Question 3</div>
      <p>What are the indications for RRT in this patient, which modality would you choose, and how would you prescribe the CRRT dose and ultrafiltration rate?</p>
    </div>
  </div>

  <hr class="section-divider">

  <div class="answers">
    <div class="answer-section">
      <div class="anum">Answer 1</div>
      <h4>Abdominal Compartment Syndrome (ACS) — the paradox of oliguria despite volume overload</h4>
      <p><strong>Diagnosis:</strong> Bladder pressure 24 mmHg + organ dysfunction (AKI, respiratory failure) = <span class="highlight">Abdominal Compartment Syndrome</span> (definition: IAP &gt;20 mmHg + end-organ dysfunction).</p>
      <p><strong>Why is this paradoxical?</strong> The IVC is dilated (2.8 cm) and CVP is high (18 cmH₂O) — this looks like a patient who has plenty of volume. Yet the kidneys are producing almost nothing. The key is <em>venous congestion</em>, not depletion:</p>
      <ul>
        <li>IAH → direct IVC compression within the abdomen → impaired venous drainage from the kidneys → renal venous hypertension</li>
        <li>Reduced net filtration pressure (arterial pressure − venous congestion pressure) → oliguria</li>
        <li>Simultaneously: elevated IAP → ↓ cardiac output (despite high CVP) → ↑ RAAS + sympathetic tone → renal vasoconstriction</li>
        <li>Result: a functional prerenal state despite systemic volume overload — giving more fluid will make it dramatically worse</li>
      </ul>
      <p><strong>High CVP itself is harmful:</strong> A meta-analysis confirmed an association between elevated CVP within 24h of ICU admission and AKI — venous congestion is an independent mediator of AKI.</p>
      <p class="citation">Brenner &amp; Rector's p. 2814; Comprehensive Clinical Nephrology 7th Ed. p. 1002</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 2</div>
      <h4>Furosemide Stress Test interpretation — predicts progression to Stage 3</h4>
      <p><strong>FST result:</strong> 60 mL over 2 hours after 200 mg furosemide (effectively 1.5 mg/kg, prior exposure dose). The threshold is &gt;200 mL in 2 hours.</p>
      <p><strong>Interpretation:</strong> <span class="highlight">FAILED FST</span> — 60 mL &lt; 200 mL threshold. This predicts progression to AKIN Stage 3 with sensitivity 87.1% and specificity 84.1%. This patient's kidneys are not responding to diuretics due to a combination of intrinsic tubular injury (UNa 52) and the mechanical compression from ACS.</p>
      <p><strong>What this means clinically:</strong></p>
      <ul>
        <li>The diuretic escalation pathway has been exhausted — Step 1 failed (furosemide 200 mg bolus = step 2 equivalent)</li>
        <li>Adding metolazone may add marginal benefit but will not overcome ACS-mediated oliguria</li>
        <li>RRT is now clearly indicated — diuretic-refractory volume overload is a firm indication</li>
        <li>Additionally, ACS requires surgical assessment — decompressive laparotomy may be needed</li>
      </ul>
      <p class="citation">Tintinalli's EM p. 610; KDIGO 2026 Table 22</p>
    </div>

    <div class="answer-section">
      <div class="anum">Answer 3</div>
      <h4>RRT — Multiple Indications, Modality Choice, and Dosing</h4>
      <p><strong>RRT indications present in this patient:</strong></p>
      <ul>
        <li>Diuretic-refractory volume overload (+11 kg, SpO₂ 93%) ✓</li>
        <li>pH 7.24 — borderline; metabolic acidosis worsening ✓</li>
        <li>K⁺ 5.9 — watch closely for ECG changes ✓</li>
        <li>AKI Stage 3 with deteriorating trajectory ✓</li>
      </ul>
      <p><strong>Modality:</strong> <span class="highlight">CRRT (CVVHDF)</span> — this patient has borderline haemodynamics (HR 102, lactate 2.8), tense abdomen limiting IVC filling, and needs slow controlled fluid removal. Rapid fluid removal with IHD risks haemodynamic collapse and further renal hypoperfusion.</p>
      <p><strong>CRRT prescription (KDIGO 2026 Grade 1B):</strong></p>
      <ul>
        <li><strong>Effluent dose:</strong> 20–25 mL/kg/h for solute clearance — for a 75 kg patient: 1,500–1,875 mL/h total effluent</li>
        <li><strong>Net ultrafiltration (fluid removal) rate:</strong> Start at 1.5–2 mL/kg/h and titrate gently. The 2025 meta-analysis (PMID 39889501) showed aggressive UF rates independently increase mortality — do NOT rush fluid removal. Target gradual negative balance.</li>
        <li><strong>Goal fluid balance:</strong> Aim for −200 to −400 mL/h net negative balance initially — enough to relieve pulmonary oedema and reduce IAP without haemodynamic compromise</li>
        <li><strong>Reassess every 4–6 hours:</strong> Check MAP, lactate, bladder pressure — reduce UF rate if MAP drops</li>
        <li><strong>Do NOT use high-volume hemofiltration (HVHF):</strong> KDIGO 2026 Grade 1B recommendation against HVHF — no benefit and increased risk</li>
      </ul>
      <p><strong>Surgical consultation:</strong> IAP 24 mmHg + ACS = surgical emergency. Decompressive laparotomy may be required if RRT alone does not reduce IAP and restore UO.</p>
      <p class="citation">KDIGO 2026 Recommendations 5.1–5.3; Brenner &amp; Rector's pp. 2818–2822; PMID 39889501</p>
    </div>

    <div class="key-learning">
      <div class="kl-title">Key Learning Points — Case 5</div>
      <ul>
        <li>Abdominal Compartment Syndrome: IAP &gt;20 mmHg + organ dysfunction — measure bladder pressure in every oliguric ICU patient after large-volume resuscitation</li>
        <li>Oliguria despite high CVP and volume overload = venous congestion AKI — giving more fluid worsens outcomes</li>
        <li>Failed FST (UO &lt;200 mL/2h) predicts AKIN Stage 3 progression with 87% sensitivity — escalate to RRT without delay</li>
        <li>CRRT is preferred over IHD in haemodynamically unstable patients — CVVHDF provides combined diffusive + convective clearance</li>
        <li>CRRT dose: 20–25 mL/kg/h effluent (Grade 1B, KDIGO 2026); do NOT use HVHF (Grade 1B against)</li>
        <li>Net ultrafiltration: titrate gently — aggressive UF = increased mortality (2025 meta-analysis)</li>
        <li>Elevated CVP is not benign — venous congestion is an independent cause of AKI; de-escalate fluids as early as Phase 3</li>
      </ul>
    </div>
  </div>
</div>

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Running Command

chromium --headless --disable-gpu --no-sandbox \ --print-to-pdf=/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_Cases.pdf \ --print-to-pdf-no-header --no-pdf-header-footer \ /home/daytona/workspace/aki-ckd-fluid/cases.html 2>&1 | grep "bytes written"; echo "EXIT: $?"

Running Command

python3 -c " from pypdf import PdfReader import os r = PdfReader('/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_Cases.pdf') sz = os.path.getsize('/home/daytona/workspace/aki-ckd-fluid/Fluid_Management_Cases.pdf') print(f'Pages: {len(r.pages)} | Size: {sz/1024:.0f} KB') print(f'Sample: {r.pages[1].extract_text()[:150]}') "

Your case scenarios PDF is ready (16 pages, 509 KB):

Fluid Management Cases

PDF Document · PDF

What's inside — 5 clinical cases:

Case	Scenario	Key Concepts Tested
1	62M, diabetic, septic shock, oliguria	Prerenal AKI · fluid type selection · sick day drugs · Phase 1-2 resuscitation
2	58F, post-op bowel surgery, +7 kg, SpO₂ 91%	ATN vs prerenal · iatrogenic fluid overload · intraabdominal hypertension · RRT indications
3	28M, crush injury, cola-coloured urine	Rhabdomyolysis · mechanism of AKI · 10 L/day protocol · UO target 200–300 mL/h
4	71F, CKD G4, gastroenteritis, AKI-on-CKD	Sick day rules · drug interactions · IV vs oral rehydration · restarting medications safely
5	45M, ICU, post-op peritonitis, +11 kg, bladder pressure 24 mmHg	Abdominal compartment syndrome · failed FST · CRRT prescription · KDIGO 2026 dosing

Each case has a full vignette with vitals and labs → staged questions → detailed worked answers → key learning points.

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