Inertial Measurement Units (IMU)

我们开发了一种新颖的定量方法来评估步行过程中的内翻推力
从惯性测量单元 (IMU) 获得的加速度数据。这项研究旨在检查
所开发指标的可靠性并评估其区分膝关节患者的能力
骨关节炎 (OA) 伴内翻从健康成人。总体而言，16例膝关节OA和
16名健康的成年人在跑步机上行走，IMUs附着在胫骨结节和股骨外侧
Con突。作为内翻推力的指数，我们在
中外侧方向。通过将其除以行走时的摆动速度来调整该值 (已调整
RMS，A-RMS)，因为加速度的RMS与运动速度强烈耦合。
胫骨和股骨的 α-RMS的组内相关系数分别为0.85和0.73。
在胫骨和股骨的a-rms中观察到显着差异，效果大
膝关节OA患者与健康成年人之间 (Cohen d: 1.23和0.97)。我们的
结果表明，a-rms具有良好的重测重现性，可以区分
健康成年人的内翻推力

We developed a novel quantitative method for assessing varus thrust during walking using acceleration data acquired from inertial measurement units (IMUs). This study aimed to examine the reliability of the developed metrics and evaluate their ability to discriminate between patients with knee osteoarthritis (OA) exhibiting varus thrust and healthy adults. Overall, 16 knee OA patients and 16 healthy adults walked on a treadmill, with IMUs attached to the tibial tuberosity and the lateral femoral condyle. As an index of varus thrust, we calculated the root mean square (RMS) acceleration in the mediolateral direction. This value was adjusted by dividing it by the walking swing speed to obtain the adjusted RMS (A-RMS), as the RMS of acceleration is strongly coupled with movement velocity. The intraclass correlation coefficients (ICC) of A-RMS for the tibia and femur were 0.85 and 0.73, respectively. Significant differences in A-RMS were observed between knee OA patients and healthy adults for both the tibia and femur, with large effect sizes (Cohen's d: 1.23 and 0.97, respectively). Our results indicate that A-RMS exhibits excellent test-retest reliability and can effectively distinguish between knee OA patients with varus thrust and healthy adults.

搜集汇总

背景与挑战

背景概述

该数据集基于惯性测量单元(IMU)的加速度数据，开发了一种定量评估步行过程中内翻推力的新方法，旨在区分膝关节骨关节炎患者与健康成年人。研究通过调整加速度均方根值作为指标，验证了其良好的重测重现性和区分能力。