손목굴증후군에서 신경전도검사의 특성 |
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Characteristics of nerve conduction studies in carpal tunnel syndrome |
Sung Joo Park, Sa-Yoon Kang |
Correspondence:
Sa-Yoon Kang, |
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Abstract |
Nerve conduction studies are used for the electrodiagnosis of carpal tunnel syndrome (CTS), with a wide range of sensitivity
and specificity reported for each tests in clinical studies. The aim of this study was to compare the diagnostic accuracy of
various nerve conduction tests and determine the properties of the most accurate test. Forty patients with clinically confirmed
CTS and 40 healthy controls were included in the study. All patients and controls underwent various nerve conduction study
protocols for CTS. The mean age was 53±11.6 years and the female to male ratio was 2:1. The mean duration of disease was
1.25±0.61 years. The median nerve motor latency was 4.35±0.63ms while the sensory latency was 3.47±0.58ms. The median
nerve orthodromic sensory latency was found to be 2.51±0.32 ms. The conduction velocity across the palm and wrist was
28.7 m/s. The sensitivity was the highest in the inching method (89.6%) and lowest for the conventional median motor and
sensory latencies. Addition of a single test of median and ulnar sensory latency, the median and radial sensory latency or the
inching method, in routine protocol will improve the sensitivity for the diagnosis of CTS in all patients. |
Key Words:
Carpal tunnel syndrome, Median nerve, Nerve conduction study, Sensitivity |
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