Early GBS With Bulbar and Autonomic Instability
A 6-year-old boy is admitted with 10 days of progressive symmetric leg weakness that began 2 weeks after a diarrheal illness. He now cannot walk, has areflexia, and developed choking and nasal speech yesterday. Vital capacity is 55% predicted, and he has intermittent hypertension and bradycardia. He is frightened and wants to go home. The team is considering IVIG, but the resident asks whether EMG/NCS should be done today, whether a normal study would exclude the diagnosis, and when rehabilitation should begin.
1. How would you use electrodiagnostic testing in this child, and how do you interpret a normal study in the first week?
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The diagnosis is clinical, and electrodiagnostic testing supports rather than replaces it. In the first week, studies may be normal, so a normal result does not exclude Guillain-Barré syndrome; repeat in 2–4 weeks if needed. Expected findings include prolonged distal latencies, conduction block, absent F waves, and reduced compound muscle action potentials; needle EMG may show reduced recruitment early and fibrillation potentials later. Use child life support and topical anesthesia, and avoid excessive painful testing. Treatment with IVIG should not be delayed for electrodiagnostic confirmation when bulbar and respiratory involvement are present.
2. Outline respiratory and autonomic monitoring and treatment decisions.
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Admit to a monitored bed and check vital capacity, negative inspiratory force, and bulbar function every 4–6 hours; a vital capacity below 60% or a declining trend, dysphagia, or aspiration signals impending failure. Provide suction, cough assistance, and noninvasive ventilation; intubate for worsening bulbar or respiratory status. Start IVIG 2 g/kg over 2–5 days and give supportive care. Monitor blood pressure and heart rate continuously because autonomic instability can alternate with bradycardia and hypertension. Treat symptomatic extremes, avoid triggers such as suctioning without preoxygenation, and have emergency equipment ready.
3. Plan early rehabilitation and school reintegration.
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Begin rehabilitation immediately with positioning, splints, contracture prevention, pain management, and energy conservation. Mobilize gradually as respiratory status allows, and involve PT, OT, and speech therapy for swallowing and communication. Educate the family about expected recovery and fatigue. School re-entry should occur after medical stability, with homebound instruction first, then a phased return. Request an IEP, a safe mobility plan, and staff awareness of choking risk. Recovery is variable, so set short-term goals and reassess function periodically rather than predicting a fixed timeline.