Prognosis of severe XXXX with absent compound muscle action potential.

@entity1 @entity923 @entity6
INTRODUCTION: Opponensplasty is a surgical option for @entity1 with severe @entity923 ( @entity923 ). We investigated prognostic factors of @entity1 lacking preoperative compound muscle action potential (CMAP) of the abductor pollicis brevis (APB) muscle to determine the necessity for single-stage opponensplasty. METHODS: We retrospectively enrolled 22 hands of 22 @entity923 @entity1 . Prognostic factors considered were age, @entity6 , the median sensory nerve action potential, distal motor latency of the second lumbrical (2L) CMAP (2L-DML), and its amplitude (2L-Amp). Postoperative APB-CMAP amplitude (post APB-Amp) at 12 months was used as the outcome measure. RESULTS: Only 2L-DML showed a significant correlation with post APB-Amp (r = -0.56). The contribution of 2L-Amp was not significant, although 3 hands with absent 2L-CMAP had a poor electrophysiological recovery. DISCUSSION: Prolonged 2L-DML and absent 2L-CMAP seem to be poor prognostic factors. Concurrent opponensplasty may not be necessary in @entity1 with 2L-DML of 8 ms or less. This article is protected by copyright. All rights reserved.
