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KMID : 0860920210230010001
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Journal of the Korean Association EMG-Electrodiagnostic Medicine
2021 Volume.23 No. 1 p.1 ~ p.10
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Ulnar Nerve Conduction Studies: Reference Standards with Extended Uncertainty in Healthy South Korean Adults
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Chae Hyun-Jun
Kim Eun-Kyung
Lee Jae-Hyun
Lee Goo-Joo
Park Ji-Hong
Lim Jae-Young
Lee Sang-Yoon
Lee Shi-Uk
Chung Sun-Gun
Oh Byung-Mo
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Abstract
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Objective: To develop reference standards for motor and sensory ulnar nerve conduction studies (NCSs) in the South Korean population with a detailed consideration of uncertainty.
Methods: Standardized ulnar motor and sensory NCS results from healthy subjects were analyzed. Reference standards of NCSs were produced with uncertainty factors including intra- and inter-observer variability, instrumental variation, distance measurement with a tape ruler, skin surface temperature, and the resolution of NCS machines. We produced a reference value for each parameter with a mean value and expanded uncertainty.
Results: Korean reference standards of motor and sensory NCSs for the ulnar nerve were presented with average measured quantities and expanded uncertainties. All NCS measurands except negative spike duration in motor NCS and onset latency in sensory NCS showed a significant main age effect in two-way ANCOVA. Only peak amplitude and negative spike area in motor NCS showed a main sex effect, which was not observed before adjustment for anthropometric factors. No measurands showed interaction effects between age and sex.
Conclusion: This study presented reference standards of motor and sensory NCSs for the ulnar nerve with a consideration of uncertainty. These standards are expected to improve the diagnostic reliability for ulnar nerve abnormalities.
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KEYWORD
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Electrodiagnosis, Reference standards, Ulnar nerve, Uncertainty
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