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Patients with only increased duration , without conduction block, slow CV, or prolonged distal motor latency. Is this also finding suggestive of demyelinating neuropathy?
I've recently seen a patient who's NCS results like this: increased CMAP duration in all elicited nerves with reduced CMAP amplitude significantly, but without conduction block, slow CV, prolonged distal motor latency or F-waves (mild slow CV or prolonged late responses were observed, but not compatible to demyelination criteria).
That also was not temporal dispersion. All segment was increased in CMAP duration. (for example, R median 10.2 / 9.6 / 10.5 ms, R ulnar 12.3 / 12.7 / 12.5 / 13.0 ms, R tibial 24.5 / 23.9 ms , and so on.)
Is it reasonable that this patient is under demyelinating process of neuropathy? or else?
For your information, He is 50-yo and found to be paraparetic after prolonged sedation and tracheostomy (over 1 week) in ICU care. I would suspected critical illness polyneuropathy but the NCS's was a little bit confusing.
Thanks in advance.
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