Gait characterization for osteoarthritis patients using wearable gait sensors (H-Gait systems)
Gait characterization for osteoarthritis patients using wearable gait sensors (H-Gait systems)
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DOI：
10.1016/j.jbiomech.2016.01.017
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发表时间：
2016-03-21
影响因子：
2.4
通讯作者：
Tohyama, Harukazu
中科院分区：
文献类型：
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作者：
Tadano, Shigeru;Takeda, Ryo;Tohyama, Harukazu
这项工作的目的是研究在实际临床试验中使用基于可穿戴传感器的 H-Gait 系统的可能性，并提出新的步态参数来表征 OA 步态。七个 H-Gait 传感器由三轴惯性传感器组成，连接到七个下肢身体部位（骨盆、双大腿、双小腿和双脚）。测量的加速度和角速度数据用于估计患者水平行走期间的三维运动学参数。除了传统的步态时空参数外，还根据这些关节中心轨迹的特征提出了三个新参数来评估 OA 的严重程度。该实验在 10 名患有膝关节骨关节炎的受试者身上进行。将获得的运动学结果（髋关节、膝关节和踝关节角度、水平面和矢状面的关节轨迹）与参考健康（对照组）组的结果进行比较。结果，与健康受试者相比，右膝轨迹和左膝轨迹以及踝关节轨迹之间的角度几乎是健康受试者的两倍（21.3 度对 11.6 度和 14.9 度对 7.8 度）。总之，随着 OA 严重程度的增加，踝关节在站立时外展较少，以避免膝关节内收，并导致水平面中右膝/踝关节之间的锐角（不太平行）。该方法能够提供有关 OA 患者步态的定量信息，并且具有允许实验室外监测的优点。 (C) 2016 Elsevier Ltd. 保留所有权利。
The objective of this work was to investigate the possibilities of using the wearable sensors-based H-Gait system in an actual clinical trial and proposes new gait parameters for characterizing OA gait. Seven H-Gait sensors, consisting of tri-axial inertial sensors, were attached to seven lower limb body segments (pelvis, both thighs, both shanks and both feet). The acceleration and angular velocity data measured were used to estimate three-dimensional kinematic parameters of patients during level walking. Three new parameters were proposed to assess the severity of OA based on the characteristics of these joint center trajectories in addition to conventional gait spatio-temporal parameters. The experiment was conducted on ten subjects with knee OA. The kinematic results obtained (hip, knee and ankle joint angles, joint trajectory in the horizontal and sagittal planes) were compared with those from a reference healthy (control) group. As a result, the angle between the right and left knee trajectories along with that of the ankle joint trajectories were almost twice as large (21.3 degrees vs. 11.6 degrees and 14.9 degrees vs. 7.8 degrees) compared to those of the healthy subjects. In conclusion, it was found that the ankle joints during stance abduct less to avoid adduction at the knee as the severity of OA increases and lead to more acute angles (less parallel) between the right and left knee/ankle joints in the horizontal plane. This method was capable to provide quantitative information about the gait of OA patients and has the advantage to allow for out-of laboratory monitoring. (C) 2016 Elsevier Ltd. All rights reserved.