• B L Banwell, R J Mildner, A C Hassall, L E Becker, J Vajsar, and S D Shemie.
• Department of Pediatrics, Hospital for Sick Children, Toronto, Ontario, Canada. brenda.banwell@sickkids.ca
• Neurology. 2003 Dec 23;61(12):1779-82.

ObjectiveTo establish the incidence of muscle weakness in critically ill children.MethodsNeuromuscular examinations were performed in 830 children without identified antecedent or acute neuromuscular disease (age 3 months to 17 years 11 months) admitted for >24 hours to a pediatric intensive care unit (ICU) over a 1-year period.ResultsFourteen of 830 (1.7%) patients had generalized weakness. Four failed repeated attempts to extubate. Multiple organ dysfunction occurred in 11 patients and sepsis in 9. Most children received corticosteroids, neuromuscular blocking agents, or aminoglycoside antibiotics. Eight of the 14 children were solid organ or bone marrow transplant recipients. Muscle biopsy showed evidence of acute quadriplegic myopathy in all three patients in whom biopsy was performed. Three patients died. In survivors, significant weakness persisted for 3 to 12 months following ICU discharge.ConclusionsMuscle weakness is an infrequent but significant feature of critical illness in children. Transplant recipients seem to be at particular risk.

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