Institute of Medical Research, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China.
Department of Rehabilitation Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong, China.
J Healthc Eng. 2021 Nov 2;2021:7296322. doi: 10.1155/2021/7296322. eCollection 2021.
The objective of this study was to evaluate the interrater and intrarater reliability of electrical impedance myography (EIM) using handheld sensors of different sizes. Electrical impedance myography of the biceps brachii muscle of twenty healthy individuals was performed by two raters using both large and small sensors. The procedures were also repeated 5 to 8 days after the first recording session. The repeatability of the resistance, reactance, and phase angle at two different current frequencies (50 and 100 kHz) was assessed by the intraclass correlation coefficient (ICC). The ICCs of the large sensor were higher than those of the small sensor for both the intrarater and interrater reliabilities. High-frequency current tended to improve the ICC for the small sensor. These results indicate reasonable repeatability of the handheld electrode arrays for EIM measurements. The findings suggest that electrode array should be selected appropriately according to the size of the tested muscle.
本研究旨在评估使用不同尺寸手持传感器的电阻抗肌（EIM）的组内和组间可靠性。使用大、小两种传感器，由两位评估者对二十名健康个体的肱二头肌进行 EIM 测量。第一次记录后 5 至 8 天，重复进行相同的测量。采用组内相关系数（ICC）评估两种不同电流频率（50 和 100 kHz）下电阻、电抗和相位角的重复性。大传感器的 ICC 高于小传感器的 ICC，无论是在组内还是组间可靠性方面。高频电流往往会提高小传感器的 ICC。这些结果表明，对于 EIM 测量，手持式电极阵列具有合理的可重复性。研究结果表明，应根据被测肌肉的大小选择合适的电极阵列。
