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Pt 55 year old and having weakness low blood pressure
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Here is a structured clinical approach for this patient:
55-Year-Old with Subacute Weakness, Hypotension, Vomiting & Diarrhea
Top Differential: Adrenal Crisis / Primary Adrenal Insufficiency (Addison's Disease)
This triad — subacute weakness + hypotension + GI symptoms (vomiting/diarrhea) — is classic for adrenal crisis. Other causes to rule out: sepsis, GI bleed with hypovolemia, hypothyroidism (myxedema), cardiac causes.
Step 1: Immediate Stabilization
| Action | Detail |
|---|---|
| IV Access + Fluids | Normal saline (0.9% NaCl) aggressively — correct volume depletion |
| Blood glucose | Check immediately; hypoglycemia common — give D5W if needed |
| Draw bloods first | Serum cortisol, ACTH, electrolytes, glucose — then start treatment without waiting |
Step 2: Emergency Drug Treatment
Do NOT delay treatment waiting for lab results if adrenal crisis is suspected.
Adrenal Crisis (Acute)
- Hydrocortisone 100 mg IV bolus → then 200 mg/24 hrs (as 50 mg IV q6h, or continuous infusion)
- Alternative if you need cortisol assays: Dexamethasone 4 mg IV bolus (does not interfere with cortisol assays)
- IV fluids + pressor support (norepinephrine if refractory hypotension)
- Correct electrolytes: watch for hyponatremia and hyperkalemia (classic in primary adrenal insufficiency)
"Treatment of adrenal crisis should begin as soon as possible and prior to diagnostic testing when crisis is suspected." — Rosen's Emergency Medicine
Step 3: Investigations (While Stabilizing)
| Test | Expected Finding in Addison's |
|---|---|
| Serum cortisol (morning) | Low (<15 μg/dL) |
| Plasma ACTH | Elevated (primary) / Low (secondary) |
| Electrolytes | Hyponatremia, Hyperkalemia |
| Blood glucose | Hypoglycemia |
| Cosyntropin stimulation test | Stimulated cortisol <18 μg/dL = positive |
| CBC, CRP | Rule out sepsis as trigger |
| ECG | Rule out cardiac cause of hypotension |
Step 4: Chronic Maintenance (After Crisis Resolved)
| Drug | Dose | Purpose |
|---|---|---|
| Hydrocortisone | 15–25 mg/day in 2–3 divided doses (2/3 morning, 1/3 afternoon) | Glucocorticoid replacement |
| Fludrocortisone | 50–200 μg/day | Mineralocorticoid replacement (primary AI only) |
Sick Day Rules: Double/triple the hydrocortisone dose during fever, infection, vomiting, or physical stress.
Step 5: Identify & Treat the Precipitating Cause
Adrenal crisis is almost always triggered by something:
- Infection (most common — do blood cultures, CXR)
- Missed/inadequate steroid doses
- GI illness causing poor absorption
- Trauma or surgery
Disposition
- ICU admission if hemodynamically unstable (high mortality if untreated)
- Outpatient follow-up for mild chronic hypoadrenalism
Sources: Rosen's Emergency Medicine, p. 2579 | Sabiston Textbook of Surgery, p. 1757 | Barash's Clinical Anesthesia, p. 2530
⚠️ Clinical note: This is educational guidance. Always apply clinical judgment to the individual patient.
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