Department of Mechanical and Materials Engineering.
J Healthc Eng. 2013;4(4):555-76. doi: 10.1260/2040-2295.4.4.555.
This study validated the feasibility of inertial sensors in estimating lower limb joint kinematics during stair ambulation in healthy older adults and stroke survivors. Three dimensional motion data were collected using an inertial sensor-based system from 9 persons with stroke and 9 healthy older adults as they ascended and descended a staircase at a self-selected pace. The measured joint angles were compared with a laboratory-based motion capture system by computing differences in range of motion (RoM), grand mean error, standard deviation, and coefficients of multiple correlations. For stroke survivors, differences in RoM measurements between these two systems were determined to be 3.3 ± 8.1°, while the highest correlations were found in the estimation of sagittal plane joint angles after offset correction. Results suggest that the inertial sensor system is suitable for estimating major joint angles in healthy older adults as well as the RoM for stroke survivors. New calibration procedures are necessary for applying the technology to a stroke population.
本研究验证了惯性传感器在估计健康老年人和脑卒中幸存者上下楼梯时下肢关节运动学的可行性。使用基于惯性传感器的系统从 9 名脑卒中患者和 9 名健康老年人中收集三维运动数据，让他们以自选择的速度上下楼梯。通过计算运动范围（RoM）、总平均误差、标准差和多重相关系数的差异，将测量的关节角度与基于实验室的运动捕捉系统进行比较。对于脑卒中幸存者，这两个系统的 RoM 测量值之间的差异为 3.3±8.1°，而经过偏移校正后，矢状面关节角度的估计值相关性最高。结果表明，惯性传感器系统适用于估计健康老年人的主要关节角度以及脑卒中幸存者的 RoM。为了将该技术应用于脑卒中人群，需要新的校准程序。
