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Orthodromic inching test in mild carpal tunnel syndrome
Author(s) -
Seror P.
Publication year - 1998
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(199809)21:9<1206::aid-mus14>3.0.co;2-p
Subject(s) - orthodromic , carpal tunnel syndrome , wrist , medicine , median nerve , carpal tunnel release , nerve conduction study , carpal tunnel , surgery , nerve conduction , anatomy , nuclear medicine , electrophysiology
The Orthodromic inching test of the median nerve at wrist was performed on the dominant wrist of 80 controls and of 100 patients with mild carpal tunnel syndrome defined by the presence of clinical features and normal classical electrodiagnostic tests. In controls the mean conduction delay per centimeter (CD/cm) was 0.184ms and was slightly higher inside than outside the carpal tunnel; the maximal CD/cm (MCD/cm) was never greater than 0.34ms (mean 0.247). In patient the MCD/cm was 0.36 ms or more in 96 patients. This abnormality was located within the carpal tunnel in 92% of cases. Outside the entrapment site CD/cm values remained normal and similar to those found in the controls. On the whole, this results in an overall specificity of 100% and sensitivity of 96% for the Orthodromic inching test. © 1998 John Wiley & Sons, Inc. Muscle Nerve 21:1206–1208, 1998