Validation of a Device to Measure Knee Joint Angles for a Dynamic Movement
Validation of a Device to Measure Knee Joint Angles for a Dynamic Movement
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DOI：
10.3390/s20061747
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发表时间：
2020-03-01
期刊：
影响因子：
3.9
通讯作者：
Esquivel, Amanda
中科院分区：
文献类型：
--
作者：
Ajdaroski, Mirel;Tadakala, Ruchika;Esquivel, Amanda
在过去的几年里，参加体育运动的人数在美国有所增加，这增加了膝盖前十字韧带（ACL）撕裂等受伤的风险。先前的研究已经表明，起跳落地时膝盖的运动学与这种损伤之间存在相关性。本研究的目的是验证商用惯性测量单元（imu）在动态运动中准确测量膝关节角度的能力。8名健康受试者参加了这项研究。通过将可穿戴设备测量的角度与跳高着陆时通过黄金标准动作捕捉系统获得的角度进行比较，进行验证。进行均方根、线性回归分析和Bland-Altman图。可穿戴设备与运动捕捉数据之间的平均差异为8.4度（屈/伸），4.9度（ab/内收）和3.9度（旋转）。此外，该装置在较小的膝盖角度下更准确。在我们的研究中，市售的可穿戴IMU在某些条件下能够表现得相当好，而在其他条件下则不太准确。
Participation in sports has risen in the United States over the last few years, increasing the risk of injuries such as tears to the anterior cruciate ligament (ACL) in the knee. Previous studies have shown a correlation between knee kinematics when landing from a jump and this injury. The purpose of this study was to validate the ability of a commercially available inertial measurement units (IMUs) to accurately measure knee joint angles during a dynamic movement. Eight healthy subjects participated in the study. Validation was performed by comparing the angles measured by the wearable device to those obtained through the gold standard motion capture system when landing from a jump. Root mean square, linear regression analysis, and Bland-Altman plots were performed/constructed. The mean difference between the wearable device and the motion capture data was 8.4 degrees (flexion/extension), 4.9 degrees (ab/adduction), and 3.9 degrees (rotation). In addition, the device was more accurate at smaller knee angles. In our study, a commercially available wearable IMU was able to perform fairly well under certain conditions and was less accurate in other conditions.