Lee Min-Yong, Sung Kwan-Sik, Ham Hyungsuk, Yi You Gyoung, Shin Hyung-Ik
Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul, Korea.
Ann Rehabil Med. 2020 Dec;44(6):502-509. doi: 10.5535/arm.20056. Epub 2020 Dec 31.
To investigate the reliability of knee extensor strength measurements using a supine hand-held dynamometer (HHD) anchoring frame in patients with limited physical activity. Although an HHD is suitable for bedside use, its inter-rater reliability is low because measurements can be influenced by tester strength.
Maximal knee extensor isometric strength was measured using an HHD anchored to the supine frame. Three trials of three maximal contractions were assessed by two raters.
A total of 33 inpatients who were non-ambulatory due to acute illness participated in the study. The intraclass correlation coefficients were 0.974 (inter-rater) and 0.959 (intra-rater). The minimal detectable changes in intra- and inter-observer measurements were 29.46 N (24.10%) and 36.73 N (29.26%), respectively. The limits of agreement ranged from -19.79% to 24.81% for intra-rater agreement and from -21.45% to 37.07% for inter-rater agreement.
The portable dynamometer anchoring system can measure the isometric strength of the knee extensor reliably in the supine position, and could be used for measurements in patients who have difficulty visiting the laboratory and maintaining a seated posture.
探讨在身体活动受限的患者中使用仰卧位手持式测力计（HHD）固定架测量膝关节伸肌力量的可靠性。尽管HHD适用于床边使用，但其评分者间信度较低，因为测量结果可能受测试者力量的影响。
使用固定在仰卧位框架上的HHD测量最大膝关节伸肌等长力量。两名评分者对三次最大收缩的三次试验进行评估。
共有33名因急性疾病而无法行走的住院患者参与了该研究。组内相关系数分别为0.974（评分者间）和0.959（评分者内）。观察者内和观察者间测量的最小可检测变化分别为29.46 N（24.10%）和36.73 N（29.26%）。评分者内一致性的一致性界限为-19.79%至24.81%，评分者间一致性的一致性界限为-21.45%至37.07%。
便携式测力计固定系统能够在仰卧位可靠地测量膝关节伸肌的等长力量，可用于难以前往实验室和保持坐姿的患者的测量。
