CIM vs CIP EMG — FRCA Final MCQ

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HardIntensive Care MedicineCIM vs CIP EMGFRCA Final

ICU day 10: can barely lift arms. EMG: reduced CMAPs, normal sensory conduction. Diagnosis?

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Correct answer: B — Critical illness myopathy

Reduced CMAPs + normal sensory = CIM (not CIP which has motor AND sensory abnormalities). CIM: proximal weakness, elevated CK, normal sensory. Risk factors: steroids, NMBAs, sepsis, immobility. Better prognosis than CIP.

Reference: ICS – 2023 – ICU-acquired weakness