Most patients with weakness in the ED have benign explanations — fatigue, viral illness, musculoskeletal pain. But sometimes the weakness is progressive, symmetric, and dangerous. That’s when rookies must think about Guillain-Barré Syndrome (GBS). Early recognition is vital, because delayed diagnosis can mean respiratory failure or death.
What Is Guillain-Barré Syndrome?
- Acute immune-mediated polyneuropathy.
- Often triggered by infection (Campylobacter, CMV, EBV, influenza, COVID-19).
- Immune system attacks peripheral myelin or axons.
- Leads to rapidly progressive weakness and areflexia.
Classic Clinical Features
- Symmetric, ascending weakness: starts in legs, progresses to arms.
- Areflexia or hyporeflexia: hallmark finding.
- Sensory symptoms: paresthesias, but motor weakness predominates.
- Autonomic instability: fluctuating BP, arrhythmias, ileus, urinary retention.
- Cranial nerve involvement: facial weakness, dysphagia.
Rookie pearl: If weakness is asymmetric or spares reflexes, think of another diagnosis.
When to Suspect GBS in the ED
- Weakness progressing over days to weeks.
- Recent infection (especially diarrheal illness).
- Difficulty walking, climbing stairs, or holding objects.
- New facial weakness, slurred speech, or difficulty swallowing.
- Dyspnea, orthopnea, or weak cough → early respiratory muscle involvement.
Red Flags for Immediate Action
- Respiratory failure risk: Monitor FVC (forced vital capacity) — intubate if <15 mL/kg.
- Bulbar weakness: difficulty handling secretions → aspiration risk.
- Rapid progression: from walking to unable to stand within 24–48 hrs.
ED Evaluation
- Full neuro exam: strength, reflexes, cranial nerves, sensory.
- Vitals + continuous cardiac monitoring (autonomic dysfunction common).
- Bedside spirometry (FVC).
- Labs: rule out mimics (electrolytes, CK, thyroid, toxins).
- LP: classically shows albuminocytologic dissociation (high protein, normal WBC) — may be normal early.
- NCS/EMG: confirmatory, but not available in ED.
ED Management Priorities
- Admit all suspected GBS — progression is unpredictable.
- Early ICU consult if bulbar involvement or low FVC.
- Supportive care: airway protection, cardiac monitoring.
- Specific therapies (started by neuro/ICU):
- IVIG (0.4 g/kg/day × 5 days) OR
- Plasmapheresis (5 exchanges over 2 weeks).
- Steroids are not effective in GBS.
Common Rookie Mistakes
- Mislabeling GBS as “viral weakness” or “functional.”
- Forgetting to check reflexes — areflexia is the hallmark.
- Discharging a patient with progressive weakness.
- Missing respiratory failure risk — not checking FVC or monitoring closely.
- Starting steroids — no benefit in GBS.
Rookie Pearls
- Symmetric ascending weakness + areflexia = GBS until proven otherwise.
- Always assess respiratory function — weakness can progress silently.
- Admit, monitor, and escalate early — don’t wait for LP or EMG confirmation in ED.
- Remember autonomic instability — sudden bradycardia or arrhythmias may occur.
Take-Home Message
Guillain-Barré Syndrome is a neurological emergency. For rookies:
- Suspect it in patients with progressive symmetric weakness and areflexia.
- Assess airway, breathing, and bulbar function early.
- Admit for monitoring and start definitive therapy with neurology.
Remember: Missing GBS in the ED can mean intubation or death. When in doubt — admit and escalate.
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