Instituto Murciano de Investigación Biosanitaria Virgen de la Arrixaca (IMIB-Arrixaca), Murcia, Spain; Department of Physical Therapy, University of Murcia, Murcia, Spain.
Instituto Murciano de Investigación Biosanitaria Virgen de la Arrixaca (IMIB-Arrixaca), Murcia, Spain; Department of Physical Therapy, University of Murcia, Murcia, Spain.
J Electromyogr Kinesiol. 2020 Dec;55:102456. doi: 10.1016/j.jelekin.2020.102456. Epub 2020 Sep 2.
In spite of the growing use of the electrical impedance myography (EIM) measures for clinical assessment and follow-up of diseased muscle tissue, reliability studies are scarce. We evaluate the reliability of the (EIM) technique using four adhesive electrodes over the muscle of interest. Intra- and inter-rater reliability was studied within the same session and between sessions. Thirty-one healthy and volunteer subjects aged between 20 and 26 years were recruited. Phase angle, reactance and resistance were assessed for each EIM measurement. Intraclass correlation coefficient (ICC) was used to determine the relative reliability. Absolute reliability was expressed as the standard error of measurement and the minimum detectable change. Relative reliability within the same session and between sessions for the EIM technique was excellent (ICCs > 0.9) concerning both intra- and inter-rater reliability, except for the component reactance. The absolute reliability was very high for the three EIM components. EIM measures using four adhesive electrodes over the area of interest is a reliable technique to assess muscle tissue status. This study confirms that these measurement results barely vary depending on the examiner and the moment. The present study also confirms phase angle as the least affected EIM component by examiner and evaluation moment.
尽管越来越多地使用电阻抗肌描记术（EIM）来评估疾病肌肉组织的临床评估和随访，但可靠性研究仍然很少。我们使用四个粘在感兴趣的肌肉上的电极来评估 EIM 技术的可靠性。在同一时间段内和不同时间段内研究了内部和内部评估者的可靠性。招募了 31 名年龄在 20 岁至 26 岁之间的健康志愿者。对每个 EIM 测量进行了相位角、电抗和电阻的评估。使用组内相关系数（ICC）来确定相对可靠性。测量的标准误差和最小可检测变化表示绝对可靠性。EIM 技术在同一时间段内和不同时间段内的相对可靠性在内部和外部评估者方面都非常好（ICC>0.9），除了电抗分量。EIM 的三个组成部分的绝对可靠性非常高。使用四个粘在感兴趣区域上的电极的 EIM 测量是一种可靠的技术，可用于评估肌肉组织的状态。本研究证实，这些测量结果几乎不受检查者和评估时刻的影响。本研究还证实了相位角是受检查者和评估时刻影响最小的 EIM 分量。
