Predicting acute denervation in carpal tunnel syndrome

Archives of Physical Medicine and Rehabilitation
M J VennixC D Rossi

Abstract

To determine which nerve conduction parameters can predict the presence of acute denervation in carpal tunnel syndrome. The electrodiagnostic laboratories of a hospital and a county hospital district. A retrospective review. A total of 1,590 consecutive cases from January 1992 to June 1996, diagnosed as having median neuropathy at the wrist. Evidence of acute denervation on needle electromyography of the abductor pollicis brevis and its relationship to patient age, gender, and parameters obtained from nerve conduction studies, including median sensory latency and amplitude, and median motor latency and amplitude. Logistic regression analysis identified gender, median motor latency, and median motor amplitude (all p < or = .008) as contributing to the prediction of denervation. Needle examination of the cases with a median motor amplitude <7 mV detected 95.3% (141/148) of all cases with denervation and could have spared 52% (708/1,362) of the population from a needle examination of the abductor pollicis brevis. The median motor amplitude can predict the presence of acute denervation in the thenar muscles in median neuropathy at the wrist and possibly eliminate a painful needle examination of the median-innervated thenar muscles ...Continue Reading

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Citations

Apr 1, 1999·The Journal of Alternative and Complementary Medicine : Research on Paradigm, Practice, and Policy·K Branco, M A Naeser
May 19, 2006·Photomedicine and Laser Surgery·Margaret A Naeser
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