The Journal of Bone and Joint Surgery, Vol 66, Issue 1 60-64, Copyright © 1984 by Journal of Bone and Joint Surgery, Inc
Sensibility testing in patients with carpal tunnel syndrome
RM Szabo, RH Gelberman and MP Dimick
We evaluated the sensibility of the hand preoperatively and at intervals
postoperatively in twenty-three hands of twenty patients with idiopathic
carpal-tunnel syndrome who underwent carpal tunnel release. Tests of
sensibility included the threshold tests (vibrometry, 256-cycles-per-second
vibration, and Semmes-Weinstein monofilaments) and one innervation-density
test (two-point discrimination). In addition the wrist-flexion test,
nerve-percussion test, and tourniquet test were performed preoperatively.
Only five of the twenty-three hands had abnormal two-point discrimination
and each of these also had markedly abnormal threshold-test values.
Nineteen of twenty-three hands preoperatively had decreased sensibility
detected by both Semmes-Weinstein monofilament testing and vibrometry. Six
weeks after carpal tunnel release, all of the hands demonstrated
improvement on threshold testing, and 65 per cent had normal values.