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Short segment incremental studies in the evaluation of ulnar neuropathy at the elbow

✍ Scribed by William W. Campbell; Rhonda M. Pridgeon; K. Singh Sahni

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
458 KB
Volume
15
Category
Article
ISSN
0148-639X

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✦ Synopsis

Conventional electrodiagnosis may localize an ulnar neuropathy to the general region of the elbow. Separating retroepicondylar compression from compression by the humeroulnar aponeurotic arcade from compression by the deep flexorpronator aponeurosis is more difficult. In 35 patients, we compared localization by conventional inching (stimulating stepwise around the elbow searching for focal conduction block or differential slowing) to lo- calization by a more quantitative short segment incremental stimulation (SSIS) technique assessing latency change over consecutive 1 cm segments. Results of percutaneous studies were compared with findings of intraoperative electroneurography. We conclude that SSlS identifies compression levels more accurately than standard inching, and that SSlS and intraoperative electroneurography correlate highly, but not perfectly. Studies confined to a search for conduction block or differential slowing are limited by the low incidence of conduction block in chronic compression neuropathies.

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