[Electrophysiologic diagnosis of carpal tunnel syndrome in 1993. Apropos of 100 cases].
A range of diagnostic investigations and threshold values were evaluated prospectively in 100 cases of symptomatic carpal tunnel syndrome in 60 patients. Proportions of cases with abnormal findings were 44/100 for the needle study, 56/100 for distal motor latency, 65/100 for digit-to-wrist orthodromic sensory conduction velocity, and 78/100 for palm-to-wrist orthodromic sensory conduction velocity. Among the 22 patients who had normal findings for these conventional parameters, 5 had a double peak after global fourth digit stimulation, 20 had a fourth digit median-ulnar latency difference of 0.40 msec or more, and 22 had an abnormal centimetric test. These data highlight the value of palm-to-wrist orthodromic sensory conduction velocity measurements among routine tests, of fourth digit median-ulnar latency difference measurement among sophisticated nonroutine tests, and of the centimetric test as the gold standard for the diagnosis of carpal tunnel syndrome.
Laboratoire d'Electromyographie, Paris.
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002349:Carpal Tunnel Syndrome / Q000175:diagnosis* / Q000503:physiopathology; D004576:Electromyography / Q000379:methods*; D004594:Electrophysiology / Q000379:methods*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000503:physiopathology; D008875:Middle Aged; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D014459:Ulnar Nerve / Q000503:physiopathology
Le diagnostic électrophysiologique au cours du syndrome du canal carpien en 1993. A propos de 100 cas.