3-2-07. Clinical application of the measurement of muscle fiber conduction velocity using direct muscle stimulation for critical illness myopathy (CIM)

Measurement of the muscle fiber conduction velocity (MFCV) using direct muscle stimulation has been considered to be useful for the evaluation of critical illness myopathy (CIM), although there are rather few reports on this issue. Subjects consisted of 2 normal volunteers, 4 patients with myositis, and 1 patient with CIM. Stimulation was given to the muscle using a monopolar needle and the muscle fiber action potentials (MFAPs) was recorded using a concentric needle electrode. MFCV was calculated based on the onset latencies of the MFAPs recorded at different intramuscular locations.

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