Validity of gait asymmetry estimation by using an accelerometer in individuals with hemiparetic stroke.
Validity of gait asymmetry estimation by using an accelerometer in individuals with hemiparetic stroke.
复制标题
DOI：
10.1589/jpts.29.307
复制
发表时间：
2017-02
影响因子：
--
通讯作者：
Momose K
中科院分区：
文献类型：
--
作者：
Oyake K;Yamaguchi T;Sugasawa M;Oda C;Tanabe S;Kondo K;Otaka Y;Momose K
[目的]评价用加速度计和测力板测量法对脑卒中偏瘫患者步行时间和步行长度不对称性进行评估的有效性。[对象和方法] 24名曾经历过中风的人被要求在16米的人行道上行走，不使用拐杖或手动辅助。使用测力板测量步行时间和长度，这是评估步态不对称性的金标准。除了地面反作用力，躯干加速度同时测量使用加速度计。为了使用加速度计数据估计步时间不对称性，计算每条腿的向前加速度峰值之间的时间间隔。为了使用加速度计数据估计步长不对称性，计算每条腿初始接触后的正垂直加速度的积分。不对称性被认为是受影响侧值除以未受影响侧值。[结果]加速度计和测力板对步距和步长不对称性的测量结果具有显著的相关性（rho=0.83和rho=0.64）。[结论]加速度计可用于评估脑卒中偏瘫患者的步行时间和步行长度不对称性，但估计步行长度不对称性的准确性仍需改进。
[Purpose] The purpose of this study was to evaluate the validity of estimating step time and length asymmetries, using an accelerometer against force plate measurements in individuals with hemiparetic stroke. [Subjects and Methods] Twenty-four individuals who previously had experienced a stroke were asked to walk without using a cane or manual assistance on a 16-m walkway. Step time and length were measured using force plates, which is the gold standard for assessing gait asymmetry. In addition to ground reaction forces, trunk acceleration was simultaneously measured using an accelerometer. To estimate step time asymmetry using accelerometer data, the time intervals between forward acceleration peaks for each leg were calculated. To estimate step length asymmetry using accelerometer data, the integration of the positive vertical accelerations following initial contact of each leg was calculated. Asymmetry was considered the affected side value divided by the unaffected side value. [Results] Significant correlations were found between the accelerometer and the force plates for step time and length asymmetries (rho=0.83 and rho=0.64, respectively). [Conclusion] An accelerometer might be useful for assessing step time and length asymmetries in individuals with hemiparetic stroke, although improvements are needed for estimating the accuracy of step length asymmetry.