Guillain-Barré Syndrome (GBS) - A Detailed Overview

1. Definition

• Acute onset (maximum deficit by 4 weeks)
• Elevated CSF protein with low cell counts (cytoalbuminologic / albuminocytological dissociation)
• A monophasic course

• Goldman-Cecil Medicine, p. 4065
• Bradley and Daroff's Neurology in Clinical Practice, p. 2663

2. Epidemiology

• Campylobacter jejuni gastroenteritis is the most common preceding infection, especially in axonal variants
• Zika virus is associated with a significantly increased risk of all GBS forms
• Hepatitis E is a trigger in Belgium and Netherlands (5-10% of cases)
• SARS-CoV-2 infection or most vaccines are NOT substantially associated with GBS (except a slight increase with ChADOx1nCoV-19 vaccine: 0.6 cases/100,000 doses)
• GBS incidence actually declined during the COVID-19 pandemic due to reduced spread of usual infectious triggers
• Goldman-Cecil Medicine, p. 4065-4066

3. Classification / Subtypes

Common Subtypes

Rare Variants

• Miller-Fisher Syndrome (MFS): Classic triad of ophthalmoplegia, ataxia, and areflexia. Facial weakness, ptosis, and pupillary abnormalities may occur. NCS velocities are normal. Anti-GQ1b antibodies in >85% of cases. Accounts for 6% of GBS in Western countries, 18% in Taiwan.
• Pharyngeal-cervical-brachial variant
• Facial diplegia with paresthesias
• Multiple cranial neuropathy variant
• Paraparetic variant
• Acute pandysautonomia
• Bradley and Daroff's Neurology in Clinical Practice, p. 2663-2664

4. Pathobiology / Pathogenesis

• The HS/0:19 serotype of C. jejuni shares GM1-like epitopes with axonal membranes
• This triggers production of anti-GM1 antibodies
• Activated complement components (C3d, C5b-9) and immunoglobulin deposit at nodes of Ranvier
• Macrophages are recruited to targeted nodes and invade the periaxonal space
• This leads to Wallerian degeneration
• Lack of blood-nerve barrier at motor nerve terminals makes distal axons especially vulnerable to circulating GM1 antibodies

• Robbins & Kumar Basic Pathology, p. 809
• Goldman-Cecil Medicine, p. 4066

5. Clinical Features

Classic Presentation

• Weakness is the most common initial symptom - can range from mild difficulty walking to total quadriplegia with respiratory failure
• Classic ascending paralysis: leg weakness spreading to arms over hours to days
• Symmetrical weakness; proximal weakness is very common
• Areflexia/Hyporeflexia: invariable (may be absent early in disease)
• Symptoms progress over days to a maximum of 4 weeks (plateau then recovery)

Sensory Features

• Sensory loss is not prominent - often limited to distal vibration sense impairment
• Pain is underappreciated: moderate-to-severe pain in extremities, interscapular area, or back in ~70% during acute phase; may persist for a year in one-third

Cranial Nerve Involvement (45-75% of cases)

• Bilateral facial paresis in at least 50% of patients
• Extraocular muscle and lower cranial nerve involvement (less common)
• Occasional facial myokymia
• 5% present with isolated cranial nerve involvement that then descends

Autonomic Dysfunction (65% of cases)

• Cardiac arrhythmias (tachycardia, bradycardia)
• Blood pressure lability (hypertension and hypotension)
• Urinary retention
• Ileus
• Pupillary dysfunction
• Autonomic dysfunction is a major cause of mortality in ICU patients

Respiratory Involvement

• Respiratory failure requiring mechanical ventilation in 9-30% of cases (increases with age)
• Predictors of respiratory failure:
  • Rapid disease progression (onset to admission <7 days)
  • Severity of limb weakness
  • Facial weakness
  • Bulbar weakness
• Goldman-Cecil Medicine, p. 4066
• Bradley and Daroff's Neurology in Clinical Practice, p. 2663-2665

6. Diagnostic Criteria

Features Required for Diagnosis (Asbury & Cornblath criteria)

1. Progressive weakness of both legs and arms
2. Areflexia or hyporeflexia

Clinical Features Supportive of Diagnosis

• Progression over days to 4 weeks
• Relative symmetry
• Mild sensory symptoms or signs
• Bifacial palsies
• Autonomic dysfunction
• Absence of fever at onset
• Recovery beginning 2-4 weeks after progression ceases

Laboratory Features Supportive of Diagnosis

• Elevated CSF protein with <10 cells/µL (albuminocytologic dissociation)
  • CSF protein may be normal in the first 7-10 days and remains normal in up to 10% of cases
  • CSF WBC >50/mL suggests HIV or infection (Lyme disease)
• Electrodiagnostic features of nerve conduction slowing or block
  • AIDP: reduced conduction velocities, conduction blocks
  • AMAN/AMSAN: reduced compound muscle action potential (CMAP) amplitudes with relatively preserved conduction velocities

Antibodies

• Anti-GQ1b: present in >85% of Miller-Fisher syndrome cases
• Anti-GM1: present in AMAN, associated with C. jejuni infection
• Bradley and Daroff's Neurology in Clinical Practice, Box 106.10, p. 2663
• Goldman-Cecil Medicine, p. 4066-4067

7. Differential Diagnosis

• Asymmetric weakness
• Persistent bladder/bowel dysfunction
• CSF cell count >50/mL
• Fever at onset
• Sensory level (suggests spinal cord)
• Sharp sensorimotor level on examination
• Goldman-Cecil Medicine, p. 4067
• Bradley and Daroff's Neurology in Clinical Practice, p. 2666

8. Treatment

Supportive Care (Mainstay)

• Any predictors of respiratory failure
• Evidence of dysautonomia
• Signs of respiratory insufficiency

• Vital capacity < 20 mL/kg (or 30% decline from baseline)
• Maximal inspiratory pressure < 30 cm H₂O
• Maximal expiratory pressure < 40 cm H₂O

• FVC falls below 12-15 mL/kg (or <18 mL/kg with severe oropharyngeal weakness)
• Arterial PO₂ falls below 70 mmHg on room air
• Tracheostomy is required when ventilatory support is needed for >2 weeks

Immunotherapy - Two Equivalent First-Line Treatments

• IVIG and plasmapheresis are equally effective - neither is clearly superior
• Corticosteroids are NOT effective in GBS and are not recommended
• Combining IVIG + plasmapheresis offers no additional benefit
• Treatment is most effective when started within 4 weeks of symptom onset

Supportive Measures

• DVT prophylaxis (enoxaparin + compression stockings)
• Pain management (gabapentin, carbamazepine for neuropathic pain; opioids for severe acute pain)
• Urinary catheterization if needed
• Bowel management for ileus
• Cardiac monitoring for arrhythmia
• Nutritional support (NG or PEG feeding in prolonged cases)
• Rehabilitation (physiotherapy, occupational therapy)
• Bradley and Daroff's Neurology in Clinical Practice, p. 2668-2670
• Goldman-Cecil Medicine, p. 4067
• Robbins & Kumar Basic Pathology, p. 809

9. Prognosis

• Older age
• Preceding diarrheal illness (especially C. jejuni)
• Axonal variants (AMAN, AMSAN)
• Severe weakness at nadir
• Reduced CMAP amplitudes in upper extremities (indicating axonal loss)
• Need for mechanical ventilation

• Goldman-Cecil Medicine, p. 4067
• Bradley and Daroff's Neurology in Clinical Practice, p. 2670

10. GBS vs. CIDP - Key Distinction

Summary

How to Examine the Central Nervous System (CNS)

Overview - Components of the CNS Examination

The experienced clinician uses a focused examination guided by the history, plus a screening examination of everything else. More complex functions are tested first - a patient who tandem walks normally does not have a significant cerebellar or proprioceptive problem.

• Bradley and Daroff's Neurology in Clinical Practice, p. 28

1. Mental Status Examination

Consciousness & Alertness

• Note whether the patient is alert, confused, lethargic, or comatose
• Use the Glasgow Coma Scale (GCS) if impaired: Eye (1-4) + Verbal (1-5) + Motor (1-6)

Orientation

• Ask: person (name), place, date, year

Attention

• Ask to recite months backward, or serial 7s (subtract 7 from 100 repeatedly)
• Digit span forward (normal ≥6) and backward (normal ≥4)

Language (4 components)

• Fluency: Is speech fluent or non-fluent?
• Comprehension: Follow a 2-3 step command ("Pick up the paper with your right hand, fold it, and put it on the table")
• Repetition: Repeat a phrase ("No ifs, ands, or buts")
• Naming: Name common objects (watch, pen, knuckle)
• Note: Non-fluent aphasia + impaired comprehension = Broca's area lesion (left frontal); Fluent aphasia + impaired comprehension = Wernicke's area (left temporal)

Memory

• Immediate recall: Repeat 3 words
• Short-term: Recall 3 words after 5 minutes
• Long-term: Ask about past events

Visuospatial Function

• Ask to copy intersecting pentagons or draw a clock face
• Impaired in right parietal lobe lesions (constructional apraxia)

Higher Functions

• Praxis: Can patient mime brushing teeth or combing hair?
• Calculation: Serial 7s, simple arithmetic
• Abstraction: Interpret a proverb
• Judgment & insight

Quick Bedside Cognitive Tools

• Mini-Mental State Examination (MMSE): 30 points; <24 suggests cognitive impairment
• Montreal Cognitive Assessment (MoCA): More sensitive for mild cognitive impairment

Observational clues: hypomimia suggests parkinsonism; a worried/astonished expression may suggest progressive supranuclear palsy; ptosis may indicate myasthenia gravis or a brainstem lesion; the pattern of speech may reveal dysarthria or aphasia from the outset.

• Bradley and Daroff's Neurology, p. 28

2. Cranial Nerve Examination

CN I - Olfactory Nerve

• Test when: spontaneous loss of smell, suspected Parkinson's disease, or head injury
• Method: With eyes closed, ask the patient to sniff a mild familiar odour (coffee, toothpaste) and identify it
• Anosmia: inferior frontal lobe lesion (e.g., meningioma), Parkinson's disease, head trauma

CN II - Optic Nerve

• Visual acuity: Test each eye separately using a Snellen chart (with glasses on)
• Visual fields by confrontation: Face the patient at ~60 cm; compare their fields to yours; move a finger in each quadrant (inferior then superior); test both eyes simultaneously first, then separately
  • Bitemporal hemianopia: optic chiasm lesion (e.g., pituitary adenoma)
  • Homonymous hemianopia: optic tract/radiation or occipital cortex lesion
• Pupillary light reflex / RAPD (Swinging flashlight test): Shine light alternately into each eye; relative afferent pupillary defect (RAPD) = optic nerve lesion on affected side
• Fundoscopy: Examine the optic disc (color, margins, cup-disc ratio), vessels, and retina
  • Papilloedema: raised intracranial pressure
  • Optic atrophy: previous optic neuritis or compression

CN III, IV, VI - Oculomotor, Trochlear, Abducens

• Pupil size and symmetry: Note anisocoria (unequal pupils)
  • Large unreactive pupil: CN III palsy (compression, herniation)
  • Small pupil + ptosis + anhidrosis: Horner syndrome (sympathetic pathway lesion)
  • Pinpoint pupils: pontine lesion
• Accommodation reflex: Ask patient to follow finger moving to nose - pupil should constrict
• Extraocular movements (EOM): Ask patient to follow finger in an "H" pattern; look for:
  • Paresis (limited movement)
  • Diplopia in any direction (ask the patient directly)
  • Nystagmus: fast and slow phases; note direction and type
  • Horizontal nystagmus assessed at 45°, not at extreme gaze
• CN III palsy: Ptosis, "down and out" eye, dilated unreactive pupil
• CN IV palsy: Vertical diplopia; head tilt; hypertropia
• CN VI palsy: Esotropia; failure of abduction; horizontal diplopia

CN V - Trigeminal Nerve

• Sensory: Test light touch and pinprick in all three divisions (V1: forehead/scalp; V2: cheek/upper lip; V3: lower jaw/chin) on each side
• Corneal reflex: Lightly touch the cornea with a wisp of cotton (not conjunctiva); normal = blink bilaterally (afferent = CN V; efferent = CN VII)
• Motor (V3): Ask to clench teeth - palpate masseters; test jaw deviation against resistance (pterygoids)
  • Jaw deviates toward side of lesion (weak pterygoid)

CN VII - Facial Nerve

• Inspect face at rest for asymmetry
• Test:
  • Raise eyebrows (frontalis)
  • Forcefully close eyes (orbicularis oculi) - try to open them
  • Show teeth / smile (orbicularis oris)
  • Puff out cheeks
• Key distinction:
  • UMN (central) facial palsy: Lower two-thirds weakness only (forehead spared) - contralateral hemisphere/cortex lesion
  • LMN (peripheral) facial palsy: Entire ipsilateral face weak including forehead - e.g., Bell's palsy, CN VII compression

CN VIII - Vestibulocochlear Nerve

• Hearing: Rub fingers near each ear; ask patient to detect whisper at ~60 cm
• Rinne test: Vibrating tuning fork (512 Hz) on mastoid until no longer heard, then at ear - normally air > bone (Rinne positive); if bone > air = conductive loss
• Weber test: Vibrating fork on forehead midline - normal lateralizes to neither side; lateralizes to bad ear in conductive loss, to good ear in sensorineural loss
• Vestibular function: Head impulse test, Dix-Hallpike maneuver for BPPV, nystagmus assessment

CN IX & X - Glossopharyngeal & Vagus

• Ask patient to say "Ahh" - palate should rise symmetrically in midline
• Unilateral palsy: uvula deviates away from lesion side
• Gag reflex: Touch posterior pharynx with tongue depressor (afferent CN IX; efferent CN X)
• Listen for hoarseness (recurrent laryngeal nerve, CN X)
• Assess swallowing

CN XI - Spinal Accessory Nerve

• Trapezius: Ask patient to shrug shoulders against resistance
• Sternocleidomastoid: Ask patient to turn head to the opposite side against resistance

CN XII - Hypoglossal Nerve

• Ask patient to protrude tongue
• Tongue deviates toward the side of an LMN lesion (weak side)
• Look for fasciculations or wasting (LMN lesion)
• Tongue deviates away from an UMN (contralateral cortical) lesion
• Harrison's Principles of Internal Medicine 22E, p. 3423-3425
• Goldman-Cecil Medicine, p. 464-480

3. Motor Examination

Step 1: Appearance (Inspection & Palpation)

• Look for muscle wasting/atrophy (LMN lesion, disuse)
• Look for fasciculations at rest (LMN - anterior horn cell disease, e.g., ALS)
• Look for involuntary movements:
  • Resting tremor (Parkinson's disease - "pill-rolling")
  • Postural tremor (essential tremor)
  • Intention tremor (cerebellar disease)
  • Chorea, athetosis, dystonia, myoclonus, tics

Step 2: Tone

• Upper limbs: rapid pronation/supination, wrist flexion/extension
• Lower limbs (supine): hands under knees, raise rapidly - normal heel drags; increased tone = heel lifts immediately

Step 3: Power (MRC Scale)

• Pronator drift: Both arms extended with eyes closed for 10 seconds - weak arm drifts downward and pronates (UMN lesion)
• Upper limb: wrist/finger extensors (radial nerve, C7), grip, finger abduction
• Lower limb: hip flexors, knee extensors, ankle dorsiflexion (L4/5), toe extension
• Harrison's Principles of Internal Medicine 22E, p. 3424

4. Coordination & Cerebellar Examination

Limb Coordination

• Finger-to-nose test: Ask patient to touch their nose, then your finger, repeatedly; look for intention tremor and dysmetria (past-pointing)
• Heel-to-shin test: Ask patient to run one heel down the opposite shin repeatedly
• Rapid alternating movements (dysdiadochokinesis): Alternating pronation/supination of the hand rapidly; slowed, irregular = cerebellar dysfunction

Signs of Cerebellar Disease (DANISH mnemonic)

• Dysdiadochokinesis
• Ataxia (limb and gait)
• Nystagmus (horizontal, towards lesion)
• Intention tremor
• Scanning (slurred, staccato) speech
• Hypotonia

Note:

5. Sensory Examination

Primary Modalities

• Stocking-glove distribution: Peripheral neuropathy (GBS, diabetes)
• Sensory level (below a dermatome): Spinal cord lesion
• Dissociated sensory loss (pain/temperature lost but vibration/proprioception intact): Anterior cord syndrome or syringomyelia
• Hemisensory loss: Contralateral hemisphere or thalamic lesion
• Crossed (face one side, body opposite): Brainstem lesion

Higher Cortical Sensory Functions (parietal lobe)

• Graphesthesia: Trace a number on the palm with eyes closed - patient identifies it
• Stereognosis: Patient identifies object placed in hand (coin, key) with eyes closed
• Two-point discrimination: Minimum distance to distinguish two simultaneous points
• Sensory extinction: Two areas touched simultaneously - parietal lesion causes extinction of one stimulus (usually contralateral)

6. Reflexes

Deep Tendon Reflexes (DTRs)

• 0 = Absent
• 1+ = Diminished
• 2+ = Normal
• 3+ = Brisk (may be normal)
• 4+ = Clonus present (pathological; UMN lesion)

Plantar Response (Babinski Sign)

• Stroke the lateral sole with a blunt object from heel toward little toe, then curve medially
• Normal: Plantar flexion of toes (downgoing)
• Abnormal (Babinski positive / extensor): Big toe dorsiflexion ± fanning of other toes = UMN lesion above S1
• Present normally in infants up to 2 years (myelination not complete)

Superficial Reflexes

• Abdominal reflexes: Stroke each quadrant toward umbilicus; umbilicus moves toward stimulus; absent = UMN lesion ipsilaterally (T8-T12)
• Cremasteric reflex: Stroke inner thigh - testicle rises (L1, L2); absent = UMN or LMN lesion
• Anal reflex (S3, S4): Touch perianal skin; sphincter contracts

Primitive Reflexes (release signs = frontal lobe disease)

• Grasp reflex: Stroke patient's palm - fingers grasp examiner's fingers
• Palmomental reflex: Stroke thenar eminence - chin muscle twitches ipsilaterally
• Snout/pout reflex: Tap philtrum - pursing of lips

Special Reflexes

• Hoffman's sign: Flick terminal phalanx of middle finger; thumb and index flex = hyperreflexia (UMN lesion in cervical cord or above)
• Clonus: Rapidly dorsiflex the foot; rhythmic oscillations = UMN lesion

7. Gait and Balance

Romberg Test

• Patient stands with feet together, arms at sides:
  • Eyes open: stable
  • Eyes closed: if the patient falls = Romberg positive
• Positive Romberg = loss of proprioception (dorsal column or peripheral sensory neuropathy) - the patient compensates visually; removing vision unmasks the deficit
• In cerebellar ataxia, the patient is unsteady with both eyes open and closed (Romberg is negative)

Tandem Gait (Heel-to-Toe Walking)

• Walk heel-to-toe along a straight line
• Fails with cerebellar midline disease or significant sensory loss

Postural Stability (Pull Test)

• Stand behind patient; pull back on shoulders briskly
• Normal: 1-2 corrective steps
• Abnormal (retropulsion): Parkinson's disease, PSP

8. Localisation Summary

• Harrison's Principles of Internal Medicine 22E, Table 433-1
• Bradley and Daroff's Neurology in Clinical Practice, p. 28-30

Quick Reference - Screening Neurological Examination (Bradley & Daroff)

Clinical Examination of a GBS Patient

Step 1: General Inspection (Before Touching the Patient)

Ask the patient about: preceding illness (fever, diarrhoea, URTI 1-4 weeks ago), time of symptom onset, rate of progression, and any breathing difficulty or swallowing problems.

Step 2: Vital Signs - CRITICAL in GBS

The "20-30-40 Rule" for intubation risk:

• Vital capacity < 20 mL/kg
• Maximum inspiratory pressure < 30 cmH₂O
• Maximum expiratory pressure < 40 cmH₂O

If all 3 are met → immediate ICU transfer and elective intubation.

Step 3: Motor Examination - The Core of GBS

3a. Inspect

• Look for muscle wasting (usually absent early; may appear after prolonged disease)
• Look for fasciculations (rare in GBS; their presence suggests anterior horn cell disease - reconsider diagnosis)
• Note posture of limbs: flaccid, lying flat

3b. Tone

• Hypotonia / Flaccidity in all affected limbs - the hallmark of a lower motor neuron/peripheral nerve lesion
• In GBS: tone is reduced or absent (not spastic)
• Test by passive wrist flexion/extension, knee lift with heel drag

3c. Power - Test Systematically Using MRC Scale (0-5)

• Typically symmetrical
• Proximal and distal weakness (unlike polyneuropathy which is usually distal-predominant)
• Classically ascending: legs > arms > respiratory/bulbar muscles
• In severe disease: near-total quadriplegia

Step 4: Reflexes - The Most Consistent Finding

Areflexia or hyporeflexia is the invariable feature of GBS - though it may be absent very early in the disease course. If reflexes are brisk or hyperreflexia is present, seriously question the diagnosis.

• In GBS: typically flexor (normal/downgoing) - as expected with an LMN/peripheral nerve lesion
• An extensor plantar (Babinski positive) in a suspected GBS patient suggests a concurrent UMN (spinal cord/central) lesion - investigate urgently

Step 5: Sensory Examination

What to Test:

• Distal > proximal (glove-and-stocking)
• Mild to moderate - motor deficits dominate
• Vibration sense is the most commonly affected modality
• Pain/paresthesias (burning, tingling) present in ~70% of patients - often severe

Pain Assessment:

• Ask specifically about back pain (interscapular/lumbar - a common early complaint in GBS, sometimes misdiagnosed as musculoskeletal)
• Dysesthetic pain: burning, tingling of limbs
• Deep aching limb pain (muscle/joint pain)

Important: if there is a sensory level on the trunk (sensation normal above a dermatome, absent below), this suggests a spinal cord lesion, NOT GBS - arrange urgent MRI spine.

Step 6: Cranial Nerve Examination

1. Ophthalmoplegia - eyes don't move fully
2. Ataxia - unsteady gait/limbs
3. Areflexia - absent reflexes (often without limb weakness)

Step 7: Coordination

• Finger-nose and heel-shin tests
• In classic GBS: incoordination is mainly due to weakness, not true cerebellar dysfunction
• In Miller-Fisher variant: true cerebellar-type ataxia is present
• Differentiate sensory ataxia (proprioception loss) from cerebellar ataxia using Romberg test

Step 8: Gait Assessment

Step 9: Autonomic Assessment

"Vagal spells": sudden bradycardia, heart block, or asystole triggered by tracheal suction or straining - watch for these in ICU patients. ECG changes (T-wave, ST, QT prolongation) can occur.

Step 10: Look for Complications

Summary of Key Examination Findings in GBS

Red Flags That Suggest Another Diagnosis (NOT GBS)

• Bradley and Daroff's Neurology in Clinical Practice, p. 2663-2670
• Neuroanatomy through Clinical Cases 3rd Edition, p. 407
• Goldman-Cecil Medicine, p. 4066-4067

Additional GBS - Deeper Details

1. Electrodiagnostic Studies (NCS / EMG) - The Cornerstone of Subtype Classification

AIDP (Demyelinating) - NCS Findings

Conduction block = CMAP amplitude drops >50% from distal to proximal stimulation - indicates focal demyelination. This is what causes clinical weakness disproportionate to axonal damage.

AMAN (Axonal Motor) - NCS Findings

AMSAN (Axonal Motor + Sensory) - NCS Findings

• Same as AMAN but SNAPs also reduced or absent
• Needle EMG: abundant fibrillations; persistently inexcitable motor nerves
• Worst prognosis of all subtypes

Miller-Fisher Syndrome (MFS) - NCS Findings

• SNAPs reduced or absent (sural sparing pattern in 1/3)
• Motor NCS usually normal
• F-waves and needle EMG usually normal
• CSF: elevated protein in ~70% at 1 week

Important pitfall: NCS may be normal in the first 7-10 days of GBS. If the clinical picture is strongly suggestive but NCS is normal, repeat in 1 week (see management flowchart below).

• Bradley and Daroff's Neurology, p. 2666-2670

2. Serological / Antibody Testing

Ganglioside antibody testing is only clinically useful for MFS (anti-GQ1b) and axonal variants (anti-GM1). Testing is not recommended routinely in classic AIDP.

3. CSF Analysis - The "Albuminocytologic Dissociation"

• WBC > 50/µL → consider HIV seroconversion, Lyme disease, CMV radiculitis, lymphomatous meningitis
• WBC > 10 but < 50 may occasionally occur in GBS with concurrent HIV or CMV

4. MRI Findings

• Brain MRI: usually normal in classic GBS
• MRI spine with gadolinium: may show nerve root enhancement of the cauda equina - particularly in children. This reflects inflammation at the roots.
• MRI is primarily used to exclude alternative diagnoses (myelopathy, cord compression, brainstem lesion)
• In MFS: MRI brain occasionally shows brainstem lesions or gadolinium enhancement of ocular motor nerves

5. Subtype Deep-Dive

AMAN - Acute Motor Axonal Neuropathy

• First reported in epidemic proportions in children/young adults in northern China (summer months)
• Now the most common GBS subtype in Asia
• Pure motor: no sensory involvement clinically or electrophysiologically
• Normal SNAPs; reduced CMAP; no conduction slowing
• Pathology: macrophage intrusion between axon and myelin at nodes of Ranvier, leading to membrane-attack complex formation → conduction failure
• Anti-GM1 and anti-GD1a IgG antibodies (molecular mimicry with C. jejuni lipopolysaccharide)
• Paradox: most patients improve as rapidly as AIDP despite axonal pattern - because conduction failure is often reversible without true axonal degeneration

AMSAN - Acute Motor-Sensory Axonal Neuropathy

• Fulminant, rare, and severe
• Maximum deficit within <7 days from onset
• Profound quadriparesis, severe muscle wasting, prolonged ventilation
• Absent CMAPs + absent SNAPs; no conduction slowing
• Abundant fibrillations on needle EMG
• Extensive wallerian degeneration in ventral AND dorsal roots
• Poor prognosis - recovery is delayed and often incomplete

Miller-Fisher Syndrome (MFS)

• Classic triad: Ophthalmoplegia + Ataxia + Areflexia
• Diplopia is often the first symptom
• Ocular signs: from complete ophthalmoplegia (dilated unreactive pupils) to partial external ophthalmoparesis ± ptosis
• Ataxia: due to peripheral mismatch between proprioceptive input from muscle spindles and kinesthetic information from joint receptors
• Motor strength: characteristically preserved - but ~5% overlap with classic GBS and develop quadriparesis
• Anti-GQ1b IgG: 95-98% positive (most sensitive and specific test in neurology)
• Precipitants: C. jejuni (20%), H. influenzae (8%)
• Prognosis: excellent - most recover fully within weeks to months
• Related condition: Bickerstaff Brainstem Encephalitis (BBE) - also anti-GQ1b positive, presents with ophthalmoplegia + ataxia + altered consciousness (CNS involvement)

6. Management Flowchart

1. Patient fulfills clinical criteria → proceed to NCS + CSF
2. If NCS/CSF normal → repeat in 1 week; consider other diagnoses
3. If abnormal → confirmed diagnosis
4. Monitor bulbar function, BP, FVC every 4-6 hours; assess severity
5. Walks unassisted, no progression → Conservative management (observe)
6. Walks with support OR bedridden AND symptoms <30 days → IVIG or plasma exchange
7. FVC <12-15 mL/kg → Mechanical ventilation

7. IVIG vs Plasmapheresis - Comparative Details

Timing matters: Treatment within 2 weeks of onset is most effective; treatment up to 4 weeks is still beneficial. After 4 weeks, immunotherapy is unlikely to help.

8. Pain Management in GBS (Often Undertreated)

9. Rehabilitation in GBS (Post-Acute Phase)

• Physiotherapy: progressive resistance and aerobic exercise; reduces fatigue and improves functional capacity
• Occupational therapy: activities of daily living retraining
• Speech therapy: bulbar and swallowing rehabilitation
• Respiratory physiotherapy: breathing exercises, weaning protocols
• Psychological support: depression and anxiety are common; quality of life is significantly affected
• Orthoses: ankle-foot orthoses for foot drop; wrist splints

10. GBS vs Acute-Onset CIDP - A Critical Distinction

1. Disease progresses or deteriorates beyond 8 weeks
2. >2 treatment-related fluctuations (improvement then worsening after IVIG/PE), especially beyond 1 month
3. Prominent sensory symptoms dominate
4. Multifocal enlargement of peripheral nerves on ultrasound
5. >3 treatment-related fluctuations is almost diagnostic of CIDP

11. Prognostic Scoring - EGOS / mEGOS

12. Long-Term Outcomes

• Respiratory failure / ventilator complications
• Autonomic instability (cardiac arrhythmias, sudden cardiac death)
• Pulmonary embolism
• Sepsis / pneumonia (aspiration)
• Acute hypoxic-ischaemic encephalopathy

13. GBS in Special Populations

GBS in Children

• More common form: AMAN (particularly in Asia after C. jejuni)
• MRI spine may show gadolinium enhancement of cauda equina
• Generally better prognosis than adults
• Pain and back pain are prominent early features

GBS in Pregnancy

• Rare but serious
• Physiological changes increase risk of respiratory failure and aspiration
• IVIG is preferred over plasma exchange (haemodynamic safer)
• Does not cross placenta; fetus generally unaffected
• Succinylcholine is contraindicated (risk of hyperkalaemia and cardiac arrest due to upregulated ACh receptors)

GBS in the Elderly

• Higher incidence (3.2 per 100,000 in >60 years)
• More severe disease; greater respiratory failure risk
• Poor prognosis; higher mortality
• Autonomic complications more dangerous

Summary Table: GBS Subtypes at a Glance

• Bradley and Daroff's Neurology in Clinical Practice, p. 2663-2675
• Goldman-Cecil Medicine, p. 4065-4068

Patient History Taking - A Detailed Guide

Fig: The diagnostic path - from chief complaint through history to differential diagnosis. Each step refines anatomical localisation and pathophysiology. (Bradley and Daroff's Neurology in Clinical Practice, Fig. 1.1)

The Structure of a Complete Patient History

Step 0: The Environment and Opening (Before Any Questions)

• Introduce yourself: name and role
• Ensure privacy: close the curtain or door
• Ensure comfort: patient seated comfortably; you at eye level (never standing over them)
• Establish rapport: a few social pleasantries first - "What type of work have you done most of your life?" / "How old are you?" / "Are you right- or left-handed?"
• Open the interview gently: "How can I be of service?" / "What brings you to see me today?" / "What is bothering you the most?"
• Empathetic demeanor: the patient may be anxious about a potentially serious diagnosis; acknowledge this
• Establish expectations: ask what the patient is hoping to learn or have confirmed from the visit
• At a follow-up visit: "How have you been since we last met?" / "Has anything changed?"

Never leap directly into questioning. The opening exchange establishes trust, sets the patient at ease, and motivates honest disclosure.

• Bradley and Daroff's Neurology, p. 24-25

Step 1: Demographic Data (Biographic Information)

Step 2: Chief Complaint (CC)

• Record it verbatim in quotation marks: "My legs have been getting weak for the past two weeks"
• It focuses the entire subsequent history
• It provides the first clue to anatomical localisation and aetiology
• It also reveals the patient's understanding of their own condition

• "What is your main problem today?"
• "What brought you to the hospital/clinic?"
• "What worries you most?"

The mode of onset is critically important. A sudden onset of headache, clumsiness, and diplopia suggests a vertebrobasilar stroke. The same symptoms over weeks suggest a posterior fossa tumour. Exacerbations and remissions point to multiple sclerosis. The chief complaint, plus the onset, starts narrowing the differential immediately.

• Bradley and Daroff's Neurology, p. 25

Step 3: History of Present Illness (HPI)

The Core Framework - SOCRATES (for each symptom)

The Temporal-Severity Profile (Most Important in Neurology)

Clarifying the Patient's Language

Questions to Ask in the HPI

• "When did you first notice this problem?"
• "Were there any warning signs before it started?"
• "Were you doing anything in particular when it began?"

• "Has it changed since it started? Got better, worse, or stayed the same?"
• "Is it there all the time or does it come and go?"
• "At its worst, how does it affect your daily activities?"
• "Can you still walk? Work? Care for yourself?"

• "Has it spread to involve other parts of your body?"
• "Did it start in one place and move?" (e.g., ascending paralysis in GBS)

• "Does anything bring it on? Activity, posture, eating, stress, heat?"
• "Does rest help? Does medication help? Which ones?"

• Headache, visual changes, hearing loss
• Weakness, numbness, tingling
• Speech or swallowing difficulty
• Bladder/bowel dysfunction
• Fits or blackouts
• Falls or gait disturbance
• Memory or personality change
• Nausea, vomiting, fever

How to Handle an Unclear or Unreliable History

• Get a collateral history from a relative, partner, or witness (essential for seizures, dementia, childhood illness, unconscious patient)
• Be aware of secondary gain (disability claims, lawsuits) affecting reliability
• Suspect somatoform/psychogenic disorder if: symptoms started suddenly after trauma; clinical features are incongruous with organic disease; multiple organ systems are involved simultaneously
• Note the patient's intelligence, memory, language function, and educational level - these all affect the quality of the history
• In children: history is always a composite of the child + parent; ask the child separately if abuse or substance use is a concern

Never accept previous doctors' opinions or test results without critical reappraisal. Take a fresh history every time. Mistakes in the prior history lead to errors in diagnosis that persist for years.

Step 4: Review of Patient-Specific Information

Medications

• All current medications (prescription, over-the-counter, vitamins, herbal, oral contraceptives, supplements)
• Patients frequently omit OTC drugs and supplements
• Always ask about drugs that cause neurological side effects:
  • Isoniazid → peripheral neuropathy
  • Ethambutol → optic neuropathy
  • Lithium → tremor, ataxia, nystagmus
  • Neuroleptics → Parkinson-like syndrome, tardive dyskinesia
  • Chemotherapy agents → peripheral neuropathy
  • Metronidazole, nitrofurantoin → neuropathy
• Ask about allergies (drug, food, contrast dye) and nature of reaction

Occupation and Exposures

• Current and previous occupations
• Chemical exposures at work or home (heavy metals, solvents, pesticides)
• Organophosphates, lead, arsenic, mercury all cause neurological disease
• Agricultural workers, factory workers, painters - high-risk occupations

Substance Use

• Alcohol: quantity (units per week), duration, last drink
  • Alcohol causes cerebellar degeneration, peripheral neuropathy, Wernicke's encephalopathy
• Tobacco: pack-year history (lung cancer → brain metastases)
• Illicit drugs: type, route, frequency
• Prescription drug misuse

Stress and Psychosocial Background

• Recent stressful life events: bereavement, divorce, job loss
• Domestic situation: who lives at home, support network
• Any hint of physical or emotional abuse
• Mental health: anxiety, depression, previous psychiatric history

Sexual History

• Important when considering HIV, syphilis (neurosyphilis), and STI-related neurological disease
• Ask sensitively; may need privacy from relatives or parents

Step 5: Review of Systems (ROS)

Neurological ROS (Ask Specifically)

General Systems ROS

A positive response in the ROS can unlock the diagnosis. Example: A patient complaining of ataxia and hemiparesis who also admits to unilateral deafness should raise suspicion for an acoustic neuroma. A patient with paraparesis plus headaches points toward a parasagittal meningioma rather than a spinal cord lesion.

Step 6: Past Medical and Surgical History (PMH/PSH)

Medical History

• Hypertension, diabetes, hyperlipidaemia (cerebrovascular disease risk)
• Cardiac disease: AF (embolic stroke), cardiomyopathy, valvular disease
• Autoimmune diseases: SLE, rheumatoid arthritis, vasculitis, sarcoidosis
• Malignancy: any history of cancer (brain metastases, paraneoplastic syndromes)
• Infections: TB, HIV, syphilis, viral meningitis, Lyme disease
• Metabolic: thyroid disease, renal failure, liver disease (hepatic encephalopathy), vitamin B12 deficiency (subacute combined degeneration)
• Previous neurological events: prior strokes, seizures, head trauma, meningitis
• Psychiatric history: depression, bipolar disorder, schizophrenia

Always ask about gastric surgery (→ vitamin B12 deficiency → subacute combined degeneration of cord). Never assume the patient will volunteer it.

Surgical History

• All operations with dates
• Anaesthetic complications
• Post-operative neurological events
• Head trauma, fractures, spinal surgery

Obstetric/Gynaecological History (in women)

• Pregnancies, deliveries, miscarriages
• Oral contraceptive use (→ cerebral venous thrombosis risk)
• Menstrual cycle and neurological correlates (catamenial epilepsy, menstrual migraine)

Paediatric Patients - Perinatal History

• Pregnancy complications (infections, hypertension, drugs)
• Birth history (gestational age, mode of delivery, birth asphyxia, APGAR scores)
• Neonatal problems (jaundice, seizures, feeding difficulties)
• Developmental milestones: sitting, walking, talking, social development
• School performance; learning difficulties

Step 7: Family History (FH)

• Construct a three-generation pedigree if a hereditary condition is suspected
• Ask about each first-degree relative: parents, siblings, children
• Ask specifically:
  • "Has anyone else in the family had similar symptoms?"
  • "Any neurological conditions, muscle diseases, or epilepsy in the family?"
  • "Any sudden cardiac deaths or strokes at a young age?"
  • "Are your parents related to each other?" (consanguinity → autosomal recessive disorders)

Conditions Where Family History is Critical

Patients may be unaware of a family history if relatives were misdiagnosed, died early, or never sought medical attention. Ask about relatives who "walked strangely," "had shaky hands," or "died young."

Step 8: Social History (SH)

Closing the Interview

1. Summarise back to the patient: "So if I've understood correctly, you've had..."
2. Ask: "Is there anything else you'd like to tell me or ask me?" - often the most important symptom comes out here
3. Explain what happens next: examination, investigations, plan
4. Check understanding: "Do you have any questions?"
5. Express concern and engagement: "I can see this has been very difficult for you."

The Diagnostic Logic - What the History Achieves

In neurology, the principle is unique: the history localises the lesion AND suggests the mechanism simultaneously. The examination then confirms what the history predicted. If the examination findings are inconsistent with the history, one of them is wrong - and the history usually wins.

• Bradley and Daroff's Neurology in Clinical Practice, p. 24-30

Quick Reference - Complete History Template

1. DEMOGRAPHICS: Name, Age, Sex, Handedness, Occupation, Informant

2. CHIEF COMPLAINT: [Patient's own words] - [Duration]

3. HISTORY OF PRESENT ILLNESS (SOCRATES):
   - Onset: when, how (sudden/gradual), circumstances
   - Character: quality, severity (0-10)
   - Location and radiation
   - Time course: constant vs. intermittent; progressive vs. stable vs. improving
   - Aggravating and relieving factors
   - Associated symptoms
   - Effect on daily activities

4. PATIENT-SPECIFIC INFORMATION:
   - Current medications (all of them, including OTC/herbal)
   - Allergies
   - Occupational exposures
   - Substance use (alcohol, tobacco, drugs)
   - Psychosocial stressors

5. REVIEW OF SYSTEMS:
   - Neurological (cognition, mood, seizures, headache, vision, hearing, speech,
     swallowing, weakness, sensation, coordination, gait, autonomic, bladder/bowel)
   - Cardiovascular, Respiratory, GI, GU, MSK, Endocrine, Haematological, Skin

6. PAST MEDICAL HISTORY:
   - Medical conditions (with dates)
   - Surgical procedures (with dates)
   - Previous hospitalizations
   - Childhood illnesses / developmental history (paeds)

7. FAMILY HISTORY:
   - Three generations; specific neurological, cardiac, psychiatric, metabolic diseases
   - Consanguinity

8. SOCIAL HISTORY:
   - Living situation and support
   - Occupation and education
   - Lifestyle: diet, exercise, travel
   - Driving status
   - Sexual history (if relevant)

• Bradley and Daroff's Neurology in Clinical Practice, Chapter 1, p. 24-30

General Medical History Taking - Complete System-by-System Guide

The Structure of a General Medical History

1. Demographic Data / Identifying Information
2. Chief Complaint (CC)
3. History of Present Illness (HPI) — SOCRATES
4. Systemic Enquiry (Review of Systems — ROS)
5. Past Medical and Surgical History (PMH / PSH)
6. Drug and Allergy History
7. Family History (FH)
8. Social History (SH)

The Environment and Opening

• Introduce yourself (name and role)
• Ensure privacy - draw the curtain, close the door
• Sit at eye level - never stand over the patient
• Establish rapport: "How can I help you today?" / "What is bothering you the most?"
• Clarify the informant - is the patient the historian, or is it a relative/carer?
• Assess reliability - consider the patient's level of consciousness, cognitive function, language barrier, and potential secondary gain (litigation, disability claims)

Allow the patient to speak first in their own words before asking focused questions. Never interrupt within the first 60 seconds.

1. Demographic / Identifying Information

2. Chief Complaint (CC)

"My legs have been getting weak for the past two weeks."

• The CC focuses all subsequent questioning
• It reveals the patient's understanding of their illness
• It is the first clue to location and aetiology

• "What is your main problem today?"
• "What brought you to the hospital?"
• "What worries you most?"

3. History of Present Illness (HPI)

SOCRATES Framework

The Temporal Profile - Diagnostic Power

Important Clarifications

4. System-by-System Enquiry (Review of Systems)

4a. Cardiovascular System

Chest Pain

• Site: retrosternal, left-sided, epigastric?
• Onset: sudden vs exertional vs at rest?
• Character: pressure, tightness, burning, stabbing, tearing?
• Radiation: to jaw, left arm, back, epigastrium?
• Association: diaphoresis, nausea, vomiting?
• Duration: minutes (angina) vs hours (MI)?

Women and elderly patients may present with atypical chest pain, fatigue, or dyspnoea as the only MI symptom.

Dyspnoea (Breathlessness)

• Onset: sudden vs gradual?
• Exertional vs at rest?
• Orthopnoea: "Do you need extra pillows to sleep?" (heart failure)
• PND (Paroxysmal Nocturnal Dyspnoea): "Do you wake gasping for breath?" (LVF)
• Associated wheeze? Stridor? Cough?
• NYHA class:
  • I: No limitation
  • II: Slight limitation (moderate exertion)
  • III: Marked limitation (minimal exertion)
  • IV: Symptoms at rest

Palpitations

• Onset: sudden or gradual?
• Rate and rhythm: fast, slow, or irregular? ("Are they regular like a drum, or irregular like a bag of jumping beans?")
• Duration of episode?
• Precipitants: caffeine, exercise, stress, emotion?
• Associated: dizziness, syncope, chest pain?
• History of thyroid disease, anaemia, drug use?

Syncope/Pre-syncope

• Prodrome: nausea, sweating, visual dimming (vasovagal) vs none (cardiac)?
• Posture at onset: standing (vasovagal) vs any position (cardiac)?
• Duration of unconsciousness?
• Recovery: rapid + alert (vasovagal) vs prolonged confusion (post-ictal seizure)?
• Associated: incontinence, tongue biting, tonic-clonic movements (seizure)?
• Triggers: prolonged standing, micturition, cough, Valsalva, emotion, venipuncture?

Peripheral Oedema

• Onset, progression (ankle → leg → sacrum = severity)?
• Bilateral (cardiac, hypoalbuminaemia, venous insufficiency) vs unilateral (DVT, cellulitis)?
• Pitting or non-pitting?
• Associated: dyspnoea (heart failure), frothy urine (nephrotic), jaundice (liver disease)?

Claudication

• Pain in legs with walking - what distance triggers it?
• Relieves with rest (vascular) vs requires specific posture (neurogenic)?
• Which part of leg: calf (SFA), thigh/buttock (iliac disease)?

4b. Respiratory System

Cough

• Duration: acute (<3 weeks) vs subacute (3-8 weeks) vs chronic (>8 weeks)?
• Dry vs productive?
• Sputum: quantity, colour, consistency, blood-staining?
  • Yellow/green: infection (pneumonia, bronchiectasis)
  • Rust-coloured: pneumococcal pneumonia
  • Pink/frothy: pulmonary oedema
  • Frank blood: haemoptysis (TB, carcinoma, PE)
• Worse at night? (asthma, GORD, post-nasal drip)
• Worse with cold air, exercise, allergens? (asthma)
• ACE inhibitor use? (persistent dry cough → switch drug)
• Whooping quality? (whooping cough in unvaccinated)

Dyspnoea (respiratory causes)

• Wheeze: audible? (obstructive - asthma, COPD)
• Stridor: inspiratory (laryngeal, tracheal)
• Occupational exposures: dust, chemicals (occupational asthma, pneumoconiosis)
• Pets, triggers, seasonal variation (allergic asthma)
• Exercise tolerance vs baseline?

Haemoptysis

• Volume? Colour (bright red, dark, streaked in mucus)?
• Associated: fever + purulent sputum (bronchiectasis, abscess)?
• Weight loss + night sweats? (TB, carcinoma)
• Risk factors: smoking, TB contact, HIV, travel history?
• Pleuritic chest pain + hypoxia? (PE)

Wheeze and Stridor

• Wheeze: expiratory, bilateral = obstructive (asthma, COPD)
• Stridor: inspiratory, unilateral = upper airway obstruction (epiglottitis, foreign body, laryngeal tumour)

4c. Gastrointestinal System

Abdominal Pain

• Site and radiation:
  • RUQ → liver, gallbladder (radiates to right shoulder tip = biliary colic)
  • Epigastric → stomach, duodenum, pancreas (radiates to back = pancreatitis)
  • LUQ → spleen, pancreatic tail
  • Periumbilical → early appendicitis, small bowel, mesenteric ischaemia
  • RIF → appendicitis, Crohn's, ectopic pregnancy, ovarian cyst
  • LIF → diverticulitis, sigmoid colon, ovarian cyst
  • Loin to groin → ureteric colic ("renal colic")
  • Suprapubic → bladder, uterus, prostate
• Character: colicky (waves and settles = obstruction, biliary/ureteric colic) vs constant (peritonitis, pancreatitis) vs burning (peptic ulcer)
• Relationship to food: worse after eating (peptic ulcer, mesenteric ischaemia) vs better after eating (duodenal ulcer)
• Relieving posture: pancreatitis relieved by sitting forward
• Peritoneal signs: Does movement make it worse? (peritonitis = guarding, rigidity)

Dysphagia (Difficulty Swallowing)

• Solids only: mechanical obstruction (carcinoma, peptic stricture, external compression)
• Solids + liquids from the start: neuromuscular (achalasia, oesophageal spasm, motor neurone disease)
• Progressive (weeks-months): carcinoma
• Intermittent: oesophageal spasm, benign stricture
• Associated: odynophagia (painful swallowing), weight loss, regurgitation, voice change?
• Nasal regurgitation: pharyngeal pathology

Heartburn and Regurgitation (GORD)

• Burning retrosternal discomfort after meals, bending, lying flat?
• Acid taste in mouth (acid regurgitation)?
• Relieved by antacids?
• Worse at night? (nocturnal aspiration)
• Weight loss? (alarm feature for carcinoma)

Nausea and Vomiting

• Onset: relation to pain or eating?
• Content: undigested food (oesophageal obstruction), bile-stained (small bowel), faeculent (large bowel obstruction)?
• Projectile: pyloric stenosis, raised ICP (no nausea, sudden onset)
• Associated: vertigo (inner ear), headache (raised ICP, migraine)?
• Haematemesis: bright red (upper GI bleeding) vs coffee-grounds (slower bleed)?

Change in Bowel Habit

• Frequency, consistency, colour
• Diarrhoea: acute (<2 weeks, infection) vs chronic (IBD, IBS, malabsorption, carcinoma)
• Constipation: onset, duration, associated pain, obstruction symptoms?
• Blood in stool:
  • Bright red, fresh, on paper/in pan = anorectal (haemorrhoids, fissure)
  • Mixed through stool = colonic lesion (carcinoma, colitis)
  • Black, tarry (melaena) = upper GI bleed (proximal to ligament of Treitz)
• Mucus in stool: IBD, irritable bowel, rectal carcinoma
• Steatorrhoea (pale, bulky, offensive, difficult to flush): fat malabsorption (coeliac, chronic pancreatitis)
• Tenesmus: persistent feeling of incomplete evacuation → rectal carcinoma, proctitis

Jaundice

• Onset: sudden (biliary colic) vs gradual (hepatitis, carcinoma)?
• Colour of urine: dark (conjugated bilirubin = obstructive or hepatocellular)?
• Colour of stools: pale/clay-coloured = obstructive jaundice
• Pruritus: obstructive jaundice
• Associated pain: biliary colic (RUQ spasms) vs painless jaundice (carcinoma of pancreas - red flag)
• Alcohol history, IV drug use, sexual history (hepatitis B/C)?
• Recent blood transfusion, travel, tattoos?
• Contact with jaundiced individuals?

Appetite and Weight Loss

• Unintentional weight loss >5% in 6 months = red flag → malignancy, TB, endocrine, cardiac cachexia
• Associated: fever, night sweats, fatigue (lymphoma, TB, HIV)?
• Anorexia (loss of appetite): liver disease, carcinoma, depression, renal failure?

4d. Genitourinary System

Lower Urinary Tract Symptoms (LUTS)

• Frequency: how many times per day / night (nocturia)?
• Urgency: sudden compelling need to void?
• Urgency incontinence: unable to hold?

• Hesitancy: difficulty starting?
• Weak stream or intermittent flow?
• Incomplete emptying (post-void residual feeling)?
• Terminal dribbling?
• → In males: think BPH, prostate carcinoma, stricture

Haematuria

• Timing: initial (urethra), terminal (bladder neck, prostate), throughout (bladder, upper tract)?
• Clots: large clots → bladder tumour; worm-like clots → upper tract
• Painful: ureteric calculus vs painless: carcinoma (red flag)
• Associated: UTI symptoms, trauma, TB?

Loin Pain

• Ureteric colic: severe, loin-to-groin radiation, colicky, restlessness, haematuria
• Pyelonephritis: constant, dull, fever, dysuria

Gynaecological History (women)

• LMP (last menstrual period)
• Cycle: regular or irregular? Duration? Volume?
• Dysmenorrhoea (painful periods)?
• Intermenstrual or post-coital bleeding?
• Vaginal discharge: colour, odour, itching?
• Dyspareunia (pain with intercourse)?
• Pregnancies (gravida, para), miscarriages, terminations
• Contraception
• Cervical screening history (smear results)
• Menopausal status; HRT use?
• Breast lumps, nipple discharge, mammogram history?

4e. Musculoskeletal System

Joint Pain - SOCRATES

• Which joint(s)? Monoarthritis (single) vs oligoarthritis (2-4) vs polyarthritis (≥5)?
• Symmetrical (RA) vs asymmetric (reactive arthritis, psoriatic)?
• Small joints (RA, psoriatic) vs large joints (OA, septic)?
• Morning stiffness >1 hour: inflammatory (RA, AS)?
• Swelling: hot and erythematous (septic arthritis, gout) vs cool (OA)?
• Precipitated by: activity (OA, bursitis), diet - red meat/alcohol (gout), infection (reactive arthritis)?
• Associated: rash (SLE, psoriasis), eye inflammation (uveitis in AS), urethritis/conjunctivitis (reactive arthritis), diarrhoea (enteric arthritis)?

Muscle Symptoms

• Weakness: proximal (myopathy, polymyositis) vs distal (peripheral neuropathy)?
• Myalgia: diffuse (fibromyalgia, statin, viral) vs localised (injury)?
• Tenderness: specific trigger points (fibromyalgia)?
• Wasting or fasciculations: LMN / motor neurone disease?

Back Pain

• Site: cervical, thoracic, lumbar, sacral?
• Radiation: down leg (radiculopathy)? Where does it go? Below knee (sciatica - L4/L5/S1)?
• Mechanical vs inflammatory: worse with activity + relieved by rest (mechanical) vs worse at rest + early morning + improved with activity (inflammatory - ankylosing spondylitis)?
• Red flags in back pain:
  • Age >50 or <20
  • Night pain / rest pain
  • Systemic symptoms (weight loss, fever)
  • History of malignancy
  • Bladder/bowel dysfunction (cord compression)
  • Saddle anaesthesia (cauda equina - emergency)

4f. Endocrine System

Thyroid

• Hyperthyroidism: weight loss despite increased appetite, palpitations, tremor, heat intolerance, diarrhoea, anxiety, exophthalmos?
• Hypothyroidism: weight gain, constipation, cold intolerance, dry skin/hair, fatigue, bradycardia, hoarse voice, depression?

Diabetes

• Polyuria, polydipsia, polyphagia (the "three Ps")?
• Recurrent infections (skin, UTI, candida)?
• Blurred vision (osmotic lens changes)?
• Symptoms of complications: neuropathy (tingling/numbness feet), nephropathy (swelling), retinopathy (vision loss)?

Adrenal

• Cushing's: weight gain (central), hirsutism, striae, easy bruising, mood change, proximal muscle weakness?
• Addison's: fatigue, postural dizziness, weight loss, salt craving, hyperpigmentation (sun-exposed areas and pressure points)?

4g. Haematological System

• Anaemia symptoms: fatigue, dyspnoea on exertion, pallor, palpitations, headache, tinnitus?
• Bleeding tendency: easy bruising, prolonged bleeding from cuts, epistaxis, haemarthrosis?
  • Mucosal bleeding + petechiae: platelet defect (ITP, drugs)
  • Deep tissue bleeding + haemarthrosis: coagulation factor defect (haemophilia)
• Thrombotic tendency: DVT, PE, recurrent miscarriages (thrombophilia)?
• Lymphadenopathy: which nodes? Tender (infection) vs non-tender (lymphoma)?
• Night sweats + weight loss + fever (B symptoms): lymphoma, TB, HIV, leukaemia?

4h. Neurological System (within general history)

• Headaches: onset, character, location, severity, associated symptoms (nausea, photophobia, aura), frequency?
• Dizziness/vertigo: room spinning vs lightheaded?
• Weakness: which limb(s)? Onset? Ascending or descending?
• Sensory: numbness, tingling, burning?
• Seizures: description, frequency, any triggers, post-ictal state?
• Speech: slurring, difficulty finding words?
• Vision: double, blurred, loss?
• Memory: short-term or long-term loss?
• Headache + vomiting + neck stiffness + photophobia = meningism (emergency)

4i. Dermatological System

• New rash: onset, distribution, character (flat/raised/blistering/pustular), itching?
• Changes in existing moles: size, shape, colour, border, bleeding (ABCDE rule)?
• Hair loss, nail changes, skin thickening?
• Ulcers: painful (venous/neuropathic) vs painless?

4j. Ophthalmological / ENT

• Visual acuity: blurring, loss?
• Redness, pain, photophobia (iritis, acute glaucoma)?
• Floaters, flashing lights (retinal detachment)?
• Diplopia?

• Hearing loss: gradual (sensorineural) vs sudden (SSNHL - emergency)?
• Tinnitus: unilateral (acoustic neuroma)?
• Vertigo: duration? Triggered by head position (BPPV)?
• Otalgia (ear pain) + discharge?

• Epistaxis, nasal obstruction, anosmia?
• Sore throat, hoarseness, stridor?
• Dysphagia?

5. Past Medical and Surgical History

• All medical conditions with dates
• All surgical procedures with dates and any complications
• Previous hospitalisations
• Trauma (especially head, spine)
• Blood transfusions
• Vaccinations (especially relevant: influenza preceding GBS)

Always ask specifically about conditions patients may not volunteer: gastric surgery (B12 deficiency), sarcoidosis (multi-system neurological effects), previous malignancy (metastases, paraneoplastic syndrome), previous TB.

6. Drug and Allergy History

Drug History

• All current medications: dose, frequency, route, duration
• OTC drugs, vitamins, supplements, herbal remedies (patients rarely volunteer these)
• Recent changes or new prescriptions
• Compliance: "Do you take them regularly?"

Allergy History

• Drug allergies: which drug, what reaction (rash, anaphylaxis, GI intolerance)?
• Food allergies
• Contrast dye allergy (important before imaging)
• Latex allergy

Always distinguish a true allergy (immune-mediated - urticaria, angioedema, anaphylaxis) from an intolerance (GI upset, headache).

7. Family History

• Parents: ages, alive/dead, cause of death
• Siblings: health status
• Children: health status
• Three-generation pedigree if hereditary disease suspected

• "Has anyone in the family had a similar problem?"
• "Any heart disease, stroke, diabetes, cancer, epilepsy, or blood disorders?"
• "Any sudden deaths in young relatives?" (long QT syndrome, HCM, sudden cardiac death)
• "Are your parents related?" (consanguinity → autosomal recessive disease)

8. Social History

CAGE Questionnaire (Alcohol Screening)

2 or more "yes" answers = likely alcohol use disorder

1. Have you ever felt you should Cut down on drinking?
2. Have you ever been Annoyed by criticism about your drinking?
3. Have you ever felt Guilty about your drinking?
4. Have you ever needed an Eye-opener (drink first thing in the morning)?

Closing the History

1. Summarise back: "So if I understand correctly, you've had..."
2. Invite additions: "Is there anything else you want to tell me that I haven't asked?"
3. Acknowledge concerns: "I can understand this has been worrying you."
4. Explain next steps: "I'd now like to examine you, and then we'll talk about what tests might be helpful."
5. Check understanding: "Do you have any questions for me?"

Complete History Template (Quick Reference)

PATIENT: Name / Age / Sex / Occupation / Informant

1. CHIEF COMPLAINT: [In patient's own words] × [Duration]

2. HISTORY OF PRESENT ILLNESS (SOCRATES for each symptom):
   S - Site
   O - Onset (sudden/gradual, date, circumstances)
   C - Character (quality, description)
   R - Radiation
   A - Associated symptoms
   T - Time course (constant/episodic, progression)
   E - Exacerbating and Relieving factors
   S - Severity (0-10, effect on function)

3. REVIEW OF SYSTEMS:
   CVS: chest pain, dyspnoea, palpitations, syncope, oedema, claudication
   RS: cough, dyspnoea, wheeze, haemoptysis, chest pain, sputum
   GI: appetite, weight, dysphagia, heartburn, N&V, abdominal pain,
       bowel habit, rectal bleeding, jaundice
   GU: LUTS, haematuria, loin pain; menstrual/gynaecological (F)
   MSK: joint pain/swelling/stiffness, muscle weakness, back pain
   Neuro: headache, dizziness, weakness, numbness, seizures, memory
   Endocrine: weight change, thirst, polyuria, heat/cold intolerance
   Haematology: fatigue, bleeding, bruising, lymphadenopathy
   Skin: rash, lesions, hair/nail changes
   Eyes/ENT: vision, hearing, vertigo, tinnitus, nose, throat

4. PAST MEDICAL HISTORY:
   Conditions (with dates) | Operations | Hospitalisations | Trauma

5. DRUG AND ALLERGY HISTORY:
   All medications (incl. OTC, supplements, contraception, herbal)
   Allergies + nature of reaction

6. FAMILY HISTORY:
   Parents, siblings, children - conditions and age of death
   Hereditary diseases; consanguinity

7. SOCIAL HISTORY:
   Living situation | Occupation | ADL | Alcohol (CAGE) | Tobacco
   Illicit drugs | Travel | Sexual history | Driving | Support network

• Bradley and Daroff's Neurology in Clinical Practice, Chapter 1, p. 24-30
• Goldman-Cecil Medicine, p. 2491-2607
• Campbell-Walsh Wein Urology, p. 23-24

History Taking - Continued: Advanced Skills, Special Populations & Applied Techniques

Part 9: The Art of Questioning

Open-Ended vs Closed-Ended Questions

The funnel technique: Each area of the history should begin with open-ended questions and progressively narrow to closed-ended questions. Then, as you move to a new topic, open up again with another open-ended question. The interview is a series of funnels, not a single one.

1. Open: "Tell me about your chest pain."
2. Semi-open: "Can you describe where you feel it and when it comes on?"
3. Closed: "Does it radiate to your left arm?" / "Does it come on with exertion?"
4. Transition to new area (open): "Tell me about your breathing."

The most valuable rapport-promoting element of verbal communication is the use of open-ended questions at the onset of the interview - they signal that you are genuinely listening, not just checking boxes.

• Kaplan and Sadock's Synopsis of Psychiatry, p. 36-37
• Textbook of Family Medicine 9e, p. 42

Questions to Avoid

Part 10: Communication Skills - Patient-Centred History Taking

The ICE Framework (Ideas, Concerns, Expectations)

A patient with back pain may secretly fear they have cancer (concern). They want reassurance, not just a prescription (expectation). Their idea is that heavy lifting caused it (idea). Without knowing ICE, you may give the medically correct answer but leave the patient completely unsatisfied and non-compliant.

Nonverbal Communication - SOLER

Physicians who stand over a lying or undressed patient, hold conversations while the patient is exposed, or are consistently late for appointments signal disrespect for the patient and erode the therapeutic relationship - damaging future disclosure.

Verbal Empathy - NURSE

Active Listening Techniques

Responding to Emotional Cues

Part 11: The Ask-Tell-Ask Framework (for delivering information)

1. ASK first: "What do you already know about your condition?"
2. TELL: Give information simply, in plain language, in small chunks
3. ASK again: "Does that make sense?" / "Do you have any questions?"

Patients retain only 20-30% of what doctors tell them in a consultation. Checking understanding at every step dramatically improves information retention and adherence.

Part 12: Special Situations in History Taking

12a. The Unconscious or Critically Ill Patient

• Obtain collateral history from: family, carers, ambulance crew, GP letter, previous notes
• Use AMPLE mnemonic for emergency situations:

12b. The Paediatric History

Additional Components:

• Maternal health during pregnancy: infections, drugs, alcohol, diabetes, hypertension?
• Gestational age at birth (term, preterm)?
• Mode of delivery (normal vaginal, caesarean, instrumental)?
• Birth weight
• APGAR scores at 1 and 5 minutes
• Any complications at birth: asphyxia, resuscitation required?
• Neonatal jaundice, seizures, feeding difficulties?
• Time in NICU?

• Is development progressing? Or regressing (red flag for neurodegenerative disease)?
• School performance: learning difficulties, attention (ADHD)?

• Vaccinations up to date?
• Any adverse reactions?

• Breast or bottle fed? Duration?
• Introduction of solids?
• Current diet?

• "Is there anything wrong at school or at home?"
• For adolescents: ask about sexual activity, substances, mental health away from parents
• Look for signs of child abuse: unexplained injuries, fearful behaviour, inappropriate sexual knowledge

12c. The Elderly Patient

• Multiple comorbidities and polypharmacy (medication interactions are a common hidden cause of symptoms)
• Atypical presentations: MI may present as fatigue; infection as confusion; abdomen as falls
• Cognitive impairment: use a short cognitive screen early (MMSE or AMT); may need collateral history
• Ask specifically about: falls (frequency, circumstances, injuries), functional decline (ADL changes), continence, vision and hearing (affect safety and quality of life)
• Social circumstances: does the patient live alone? Who does the shopping/cooking/medications?
• Carer burden: is the carer coping? Signs of elder abuse?
• Advance care planning: does the patient have a DNACPR, lasting power of attorney, or advance directive?

12d. The Psychiatric History

12e. The Surgical Pre-Operative History

• Airway: previous difficult intubation? Neck mobility? Mouth opening?
• Anaesthetic history: previous general/regional anaesthesia; any complications?
• Cardiovascular fitness: exercise tolerance (METs); cardiac disease?
• Respiratory: asthma, COPD, sleep apnoea (OSA)?
• Bleeding history: easy bruising, anticoagulants, antiplatelet drugs (aspirin, clopidogrel)?
• Last oral intake: nil by mouth (NBM) status?
• Consent: does the patient understand the procedure and risks?

12f. The Obstetric/Gynaecological History

• G = Gravida (total number of pregnancies)
• P = Para (number of deliveries >24 weeks)
• Full breakdown: Term deliveries / Preterm / Miscarriages / Ectopic pregnancies / Living children
• For each previous pregnancy: gestation, mode of delivery, complications, birth weight, neonatal outcome

• LMP and gestational age (EDD by LMP and ultrasound)
• Antenatal care: where, how many visits, any complications?
• Anomaly scans? Results?
• Symptoms: nausea/vomiting, bleeding, discharge, reduced fetal movements?
• Risk factors: hypertension, diabetes, placenta praevia?

• Menstrual history: age at menarche, cycle length, duration, flow, LMP
• Dysmenorrhoea, menorrhagia, IMB, PCB, PMB?
• Vaginal discharge (colour, odour, quantity)?
• Cervical screening history: last smear, results?
• Contraceptive history
• STI history

Part 13: Red Flag Symptoms Across All Systems

Part 14: Functional History - The Sixth Vital Sign

Activities of Daily Living (ADL)

• Feeding: independent?
• Bathing: independent?
• Grooming (hair, teeth, shaving)?
• Dressing?
• Bowel continence?
• Bladder continence?
• Toilet use?
• Transfers (bed to chair)?
• Mobility on flat surfaces?
• Stair climbing?

• Shopping independently?
• Cooking?
• Managing finances?
• Managing medications?
• Using the telephone/technology?
• Using transport?
• Housework?
• Laundry?

Loss of IADLs typically precedes loss of basic ADLs in neurological and elderly patients. Tracking IADLs is a more sensitive measure of early functional decline.

Part 15: Ending - The Closing of the History

1. Invite additions: "Is there anything else you think might be important that I haven't asked?" - this is statistically the most productive question; often the real reason for attendance comes out here
2. Summarise and check: "So, to summarise what you've told me..." - confirms accuracy and fills gaps
3. Acknowledge the patient's agenda: "I understand this has been worrying you. Let's see what we can find."
4. Explain next steps: "I'm going to examine you now. After that, I'll explain what I think is happening and what tests might help."
5. Ask-Tell-Ask before closing: Confirm the patient understands the plan
6. Arrange safety netting: "If symptoms get worse before you hear from me, please go to A&E / call 999."
7. Say goodbye warmly: "Thank you for coming. I'll be in touch as soon as I have results."

Complete History - One-Page Reference Card

DEMOGRAPHICS: Name | Age | Sex | Occupation | Informant | Reliability

CHIEF COMPLAINT: [Patient's own words] × [Duration]

HPI - SOCRATES (for each symptom):
  Site | Onset (date, sudden/gradual) | Character | Radiation
  Associations | Time course | Exacerbating/Relieving factors | Severity

ICE: Ideas | Concerns | Expectations

SYSTEMIC ENQUIRY (ROS):
  CVS:   Chest pain | Dyspnoea (NYHA) | Palpitations | Syncope | Oedema | Claudication
  RS:    Cough | Dyspnoea | Wheeze | Haemoptysis | Sputum | Stridor
  GI:    Appetite | Weight | Dysphagia | Heartburn | N&V | Abdo pain | Bowel habit
         Rectal bleeding | PR mucus | Jaundice | Haematemesis | Melaena
  GU:    LUTS (storage + voiding) | Haematuria | Loin pain | Discharge
  Gynae: LMP | Cycle | Menorrhagia | PCB | IMB | PMB | Smear history (F)
  MSK:   Joint pain/stiffness/swelling | Myalgia | Back pain
  Neuro: Headache | Vertigo | Weakness | Numbness | Seizures | Vision | Memory
  Endo:  Weight | Thirst | Polyuria | Heat/cold intolerance | Sweating
  Haem:  Fatigue | Pallor | Bleeding | Bruising | Lymphadenopathy
  Skin:  Rash | Lesions | Hair/nail changes
  ENT/Eyes: Vision | Hearing | Tinnitus | Vertigo | Throat

PAST MEDICAL HISTORY:
  Conditions (+ dates) | Operations (+ dates) | Hospitalisations | Trauma | Transfusions

DRUG AND ALLERGY HISTORY:
  All medications (dose, frequency, duration; include OTC/supplements/herbal/contraception)
  Allergies → nature of reaction (true allergy vs intolerance)

FAMILY HISTORY:
  Parents, siblings, children | Hereditary diseases | Consanguinity
  Premature CAD | Sudden death | Malignancy | Neurological | Psychiatric

SOCIAL HISTORY:
  Living situation | Occupation + exposures | ADL (basic + instrumental)
  Alcohol (CAGE) | Tobacco (pack-years) | Illicit drugs | Travel | Sexual history
  Driving status | Support network | Advance care directives

CLOSING:
  "Is there anything else?"  →  Summarise  →  ICE addressed  →  Safety net  →  Next steps

• Bradley and Daroff's Neurology in Clinical Practice, Chapter 1
• Goldman-Cecil Medicine, p. 1109-1180
• Kaplan and Sadock's Synopsis of Psychiatry, p. 36-38
• Berek and Novak's Gynecology, p. 47

Ascitic Tapping (Abdominal Paracentesis) - A Detailed Guide

1. Definitions

2. Indications

Diagnostic Paracentesis

• New-onset ascites of unknown cause - most rapid and cost-effective way to determine aetiology
• Suspected Spontaneous Bacterial Peritonitis (SBP) - any patient with known ascites presenting with:
  • Abdominal pain or tenderness
  • Fever
  • Altered mental status
  • Unexplained clinical deterioration
  • Even mild abdominal pain without systemic infection signs
• Suspected secondary peritonitis (bowel perforation)
• Known ascites in a patient with HIV (ascites is non-AIDS-related in 75% of cases)
• Suspected malignant ascites (for cytology)
• Suspected chylous, biliary, or pancreatic ascites

Therapeutic Paracentesis

• Tense ascites causing:
  • Respiratory compromise (diaphragm pushed up)
  • Severe abdominal pain or distension
  • Refractory ascites unresponsive to maximum diuretics
• As bridge to definitive treatment (e.g., TIPS, liver transplant)
• Tintinalli's Emergency Medicine, p. 594
• Yamada's Textbook of Gastroenterology, p. 2212

3. Contraindications

Absolute Contraindications

• Acute abdomen requiring immediate surgery
• Uncooperative patient (unable to safely perform)

Relative Contraindications (weigh risk vs benefit)

Coagulopathy is NOT a routine contraindication. Transfusion-requiring haematomas occur in <1% despite 71% of cirrhotic patients having an abnormal PT. Prophylactic FFP or platelets are NOT standard practice and carry their own risks.

• Roberts and Hedges' Clinical Procedures in Emergency Medicine, p. 1028

4. Equipment

For Diagnostic Paracentesis

• Sterile gloves, sterile drapes (fenestrated and non-fenestrated)
• Skin antiseptic (povidone-iodine or chlorhexidine)
• Gauze swabs
• Local anaesthetic: lidocaine 1-2%, 10 mL syringe
• Small-bore (27-gauge) needle for skin anaesthesia
• Medium-bore (21-gauge) needles for deep infiltration
• 18- or 22-gauge paracentesis needle (or over-the-needle catheter)
• Syringes: 10 mL, 20 mL, 50 mL
• Specimen containers for lab analysis

Additional Equipment for Therapeutic (LVP)

• 16- or 14-gauge catheter (large bore speeds drainage)
• Three-way stopcock
• Sterile tubing and drainage bag / vacuum bottles
• Wall suction setup with suction canisters (for large volumes)
• Albumin for IV infusion (20% human albumin - 6-8 g per litre removed)
• Blood pressure monitoring equipment

Ultrasound Equipment (Recommended)

• Linear or curvilinear probe (low frequency for abdominal scan)
• Sterile probe cover

5. Patient Preparation

Pre-procedure

1. Explain the procedure to the patient - indications, risks, what to expect
2. Obtain informed consent
3. Ask patient to empty the bladder (by voiding or catheterisation if needed) - prevents bladder puncture
4. Position the patient: supine (preferred) or at 45° semi-recumbent

• For left lateral approach: tilt patient slightly to left to pool fluid in the left lower quadrant

1. Review coagulation status: check INR and platelets if clinically uncertain
2. Ultrasound scan - confirm ascites, identify largest fluid pocket, avoid solid organs and dilated bowel

6. Site Selection

Two Main Sites:

• The right upper quadrant (liver)
• Areas with surgical scars (adhesions below)
• Areas with dilated veins (portal hypertension collaterals)
• Midline if inferior epigastric vessels are visible

Ultrasound identifies the largest fluid pocket, confirms absence of bowel loops, and marks the safest entry point. Always scan before choosing the site.

7. Step-by-Step Procedure

Step 1: Positioning and Preparation

• Position patient supine with slight left lateral tilt
• Identify the needle insertion site (LLQ preferred)
• Perform bedside ultrasound to confirm fluid, mark the spot, identify bowel loops and solid organs
• Clean the area with chlorhexidine or povidone-iodine in concentric circles; allow to dry
• Apply sterile drapes
• Ensure sterile technique throughout

Step 2: Local Anaesthesia

• Draw up 10 mL of 1% lidocaine
• Using a 27-gauge needle, raise a skin wheal at the insertion site
• Switch to a 21-gauge needle and infiltrate deeply through the subcutaneous tissue and anterior abdominal wall, down to the peritoneum
• Aspirate before each injection to avoid intravascular injection
• At each level, inject lidocaine until resistance gives way to peritoneal fluid on aspiration - this confirms depth to peritoneum and anaesthetises the parietal peritoneum

Step 3: The Z-Track Technique (Critical Step)

1. With your non-dominant hand, pull the skin 2 cm caudally (downward) relative to the underlying abdominal wall
2. With your dominant hand, insert the paracentesis needle perpendicular to the skin surface, advancing slowly
3. After the needle enters the peritoneum and fluid returns - release the skin
4. The skin now recoils, creating a Z-shaped, offset tract - the skin hole no longer lines up with the peritoneal hole, sealing the path

This is the most important technique to prevent post-procedure fluid leak through the puncture site, especially in patients who will need repeat taps.

Step 4: Needle Advancement and Fluid Aspiration

• Attach a 10-20 mL syringe to the needle
• Advance the needle slowly while applying gentle suction on the syringe
• Use the "stop-advance" technique: advance a few mm, stop, aspirate, advance again - this allows bowel (which is usually floating in ascitic fluid) to move away safely
• Once fluid returns freely (it should be straw-coloured and clear in transudates) → STOP advancing
• For diagnostic paracentesis: aspirate 20-50 mL (minimum) into the syringe for lab analysis
• For therapeutic paracentesis: once fluid flows freely, switch to drainage tubing connected to vacuum bottles or wall suction

Step 5: Therapeutic Drainage (LVP)

• Connect the catheter to sterile tubing → three-way stopcock → vacuum drainage system or wall suction with canisters
• Drain fluid - usual volumes removed: 5-10 L (up to 12 L can be safely drained in experienced hands)
• Monitor blood pressure, heart rate, and patient comfort throughout
• When drainage slows: gently adjust patient position (slight lateral tilt helps)
• The average time to drain 5-10 L under wall suction: 30-60 minutes

Step 6: Withdrawal and Dressing

• When drainage is complete, withdraw the needle/catheter smoothly
• Apply firm pressure with a gauze swab for 2-3 minutes
• Apply a sterile adhesive dressing
• A purse-string suture can be placed around the puncture site if persistent leak is anticipated (rare)
• Monitor the patient for 30-60 minutes after procedure for complications

8. Albumin Infusion After LVP

• Roberts and Hedges' Clinical Procedures, p. 1031-1032

9. Ascitic Fluid Analysis

Standard Tests to Send

Optional Tests (based on clinical scenario)

• Triglycerides: if fluid appears milky (chylous ascites)
• Bilirubin: if fluid is dark/green (bilious ascites from bowel/biliary perforation)
• AFB smear and TB culture/PCR: if TB peritonitis suspected
• Tumour markers (CEA, CA 19-9, CA-125): malignant ascites
• pH: <7.35 in secondary peritonitis

10. Interpreting Ascitic Fluid - The SAAG

Calculation

SAAG = Serum albumin − Ascitic fluid albumin (Both measured from samples taken on the same day)

Interpretation

SAAG ≥1.1 has a 97% accuracy for portal hypertension. It has replaced the old "transudate vs exudate" classification for ascites.

Fluid Appearance and Initial Assessment

11. Diagnosing Spontaneous Bacterial Peritonitis (SBP)

• Cefotaxime 2 g IV every 8 hours × 5 days (first-line)
• Ofloxacin 400 mg PO every 12 hours (alternative in uncomplicated cases)

• Norfloxacin 400 mg PO daily (long-term)

12. Complications of Paracentesis

Local Complications

Systemic Complications (mainly LVP)

13. Post-Procedure Care

• Monitor vital signs (BP, HR, SpO₂) every 15 minutes for 1 hour after LVP, then hourly for 2-3 hours
• Check puncture site for fluid leak or haematoma at 30 minutes and 2 hours
• Albumin infusion: administer based on drained volume (see above)
• Keep dressing in place for 48 hours
• Record volume drained, fluid appearance, and samples sent
• Repeat clinical assessment at 30 minutes to identify complications
• Electrolytes and renal function at 24-48 hours post-LVP

14. Special Considerations

Ultrasound Guidance

• Always recommended, especially in:
  • Obesity
  • Previous abdominal surgery (adhesions)
  • Small or localised fluid collections
  • Suspected bowel distension
  • Pregnant patients
• US confirms: fluid location, absence of bowel loops at target site, depth to fluid
• Peritoneal fluid appears anechoic (black) on ultrasound; bowel appears relatively echogenic

Refractory Ascites Management Ladder

1. Regular LVP (every 2-4 weeks) + albumin
2. TIPS (Transjugular Intrahepatic Portosystemic Shunt) - reduces portal hypertension
3. Liver transplantation - definitive treatment
4. Peritoneovenous shunting (rarely used now)

15. Summary - Quick Reference

INDICATIONS:
  Diagnostic: new ascites, suspected SBP, unknown aetiology
  Therapeutic: tense ascites causing respiratory/severe symptoms; refractory ascites

SITE: Left lower quadrant (preferred) — lateral and cephalad to
      inferior epigastric vessels; ultrasound guided

KEY TECHNIQUE: Z-track method — pull skin 2 cm caudally before inserting needle;
               release after peritoneum penetrated → seals tract, prevents leak

DIAGNOSTIC TAP: 20-100 mL → Cell count, albumin, protein, glucose,
                Gram stain + culture (blood culture bottles at bedside), LDH, cytology

THERAPEUTIC TAP: 5-12 L → Slow drainage; albumin 6-8 g per litre removed

SAAG ≥ 1.1 g/dL = Portal hypertension (cirrhosis, cardiac, Budd-Chiari)
SAAG < 1.1 g/dL = Non-portal (malignancy, TB, pancreatitis, nephrotic)

SBP: PMN ≥ 250/µL → Cefotaxime 2 g IV q8h immediately

ALBUMIN AFTER LVP: 6-8 g per litre drained (if >5 L removed)
                   Prevents post-paracentesis circulatory dysfunction

• Tintinalli's Emergency Medicine, p. 594-595
• Roberts and Hedges' Clinical Procedures in Emergency Medicine, p. 1028-1032
• Mulholland and Greenfield's Surgery 7e, p. 2939
• Yamada's Textbook of Gastroenterology, p. 2212