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Ann Clin Neurophysiol > Volume 16(1); 2014 > Article
Ann Clin Neurophysiol. 2014; 16(1): 21-26.
Published online June 30, 2014.
doi: https://doi.org/10.14253/kjcn.2014.16.1.21
Clinical and Electrophysiological Changes after Open Carpal Tunnel Release: Preliminary Study of 25 Hands
Ji Won Yang, Young Hee Sung, Kee Hyung Park, Yeong Bae Lee, Dong Jin Shin, and Hyeon Mi Park Park
Corresponding Author: Hyeon Mi Park Park ,Tel: +82-32-460-3346, Fax: +82-460-3344, Email: neurohm@gilhospital.com
Received December 6, 2013    Accepted June 9, 2014
Copyright © 2014 The Korean Society of Clinical Neurophysiology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Background: Electrophysiological study has been known as a useful method to evaluate the therapeutic effect of operation in idiopathic carpal tunnel syndrome (CTS). The purpose of this study was to evaluate the clinical and electrophysiological changes after carpal tunnel release (CTR) compared to the preoperative results.
We analyzed the changes of nerve conduction study (NCS) before and after minimal open carpal tunnel release in 18 patients (25 hands) with CTS. Follow-up study was performed over 6 months after operation.
Clinical improvement was seen in all cases after CTR. In contrast, electrophysiological improvement was various depending on the parameters; the mean median sensory latency and nerve conduction velocity (NCV) improved significantly (p = 0.001). The mean median motor latency also improved, but NCV and compound muscle action potential (CMAP) amplitude did not change. The extent of improvement was evident in moderate CTS, but not in severe CTS.
In this preliminary study, all subjects who underwent CTR achieved a clinical relief along with a significant improvement of electrophysiological parameters such as median sensory latency, sensory NCV and median distal motor latency. After CTR, a number of cases with mild to moderate CTS showed a prominent improvement of clinical and electrophysiological parameters, while fewer improvements were seen in severe CTS, although it did not reach the statistical significance.
Key words: Carpal tunnel syndrome, Electrophysiology, Median nerve
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