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KMID : 1035220150070010026
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Korean Journal of Neuromuscular Disorders
2015 Volume.7 No. 1 p.26 ~ p.32
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Diagnostic Usefulness of Routine Nerve Conduction Studies for the Patients with Carpal Tunnel Syndrome
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Heo Deok-Hyun
Kim Ji-Sun
Lee Kyung-Bok
Park Su-Yeon
Ahn Moo-Young
Roh Hak-Jae
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Abstract
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Background: Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy. There are many additional electrophysiologic methods for diagnosis of CTS. However, these methods give unpleasant pain to patients and result in rising costs. We analyze routine nerve conduction studies to improve diagnostic simplification and sensitivity for CTS.
Methods: A total of 70 patients with clinically diagnosed CTS and 207 control subjects were enrolled. All subjects were examined by routine nerve conduction studies. Normal limits were derived by calculating the mean±2 standard deviations from the data of the controls. The sensitivity and specificity of each test were calculated.
Results: The difference between median and ulnar sensory peak latency was the most sensitive parameter for CTS. The sensitivity and specificity of the median-ulnar sensory latency difference was 59.4% and 96.5% respectively. The patients with 2 or more abnormal findings in 5 newly developed parameters (difference of motor terminal latency between median and ulnar nerve, difference of sensory peak latency between median and ulnar nerve, difference of sensory peak latency between median and radial nerve, difference of F wave latency between median and ulnar nerve and modified combined sensory index) could be more sensitive for CTS.
Conclusions: In our study, some parameters derived from routine nerve conduction studies, especially difference between median and ulnar sensory latency, could be more sensitive for diagnosis of CTS.
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KEYWORD
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Carpal tunnel syndrome, Nerve conduction studies, Median nerve
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