Validation of a Device to Measure Knee Joint Angles for a Dynamic Movement

Sensors

Lorraine Nichols¹  Amanda Esquivel¹  Mirel Ajdaroski¹  Ruchika Tadakala¹ 

[1] Department of Mechanical Engineering, College of Engineering and Computer Science, University of Michigan-Dearborn, Dearborn, MI 48128, USA;

关键词: internal measurement unit;    knee kinematics;    knee angles;    sports medicine;   

DOI  :  10.3390/s20061747

来源: DOAJ

【 摘 要 】

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° (flexion/extension), 4.9° (ab/adduction), and 3.9° (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.

【 授权许可】

Unknown