| ORIGINAL ARTICLE |
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| Year : 2019 | Volume
: 10
| Issue : 3 | Page : 131-136 |
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Comparative analysis of nerve conduction study methods in patients with carpal tunnel syndrome
Deepak Jain, Pankaj Kumar Saini, Chandra Mohan Sharma, Banshi Lal Kumawat
Department of Neurology, S.M.S. Medical College, Jaipur, Rajasthan, India
Correspondence Address:
Dr. Pankaj Kumar Saini
F 40, R.D. Hostel, S.M.S. Medical College, Jaipur, Rajasthan
India
 Source of Support: None, Conflict of Interest: None
DOI: 10.4103/INJMS.INJMS_34_19
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Background: Patients with mild-to-moderate carpal tunnel syndrome (CTS) may not be picked up by routine nerve conduction methods. Hence, this study was performed to identify the most sensitive way to detect mild-to-moderate CTS and to evaluate the sensitivity of different methods for the diagnosis of CTS. Subjects and Methods: We included 60 clinically confirmed CTS patients in our study. We recorded the clinical characteristics and laboratory features in a prescribed proforma. We also included 60 healthy age- and sex-matched asymptomatic individuals as controls in our study. We excluded patients with underlying peripheral neuropathy. We included median distal motor latency, median distal sensory latency, median-versus-ulnar second lumbrical-interossei comparison study, median-versus-ulnar wrist-to-digit four comparison study, median-versus-radial thumb sensory study, median-versus-ulnar motor distal latency difference, and median-versus-ulnar sensory latency difference tests in our study. Results: Of 60 patients, female: male ratio was 2.3:1, and the mean age was 44.28 ± 11.41 years. Mean symptom duration was 0.76 ± 0.03 years. Of 42 females, 38 (90.4%) were engaged in daily household activities. In patients group, median nerve distal motor latency was 5.024 ± 2.05 ms, whereas sensory latency was 3.53 ± 0.75 ms. Sensitivity was the highest in median-versus-ulnar wrist-to-digit four comparison study (90.19%), followed by median-versus-radial thumb sensory study (88.23%), and median-versus-ulnar second lumbrical-interossei comparison study (86.27%). Median distal motor latency test had the lowest sensitivity (72.55%). Conclusions: In patients with mild CTS, electrophysiological tests including median-versus-ulnar wrist-to-digit four comparison study, median-versus-radial thumb sensory study, and median-versus-ulnar second lumbrical-interossei comparison study should be incorporated to improve the sensitivity for the diagnosis of CTS. |
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