Hip contact forces and gait patterns from routine activities
Hip contact forces and gait patterns from routine activities
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DOI：
10.1016/s0021-9290(01)00040-9
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发表时间：
2001-07-01
影响因子：
2.4
通讯作者：
Duda, GN
中科院分区：
文献类型：
--
作者：
Bergmann, G;Deuretzbacher, G;Duda, GN
作用于髋关节的体内载荷仅在少数患者中测量，且没有步态数据的详细记录。需要这些信息来测试和改善髋关节植入物的磨损、强度和固定稳定性。在最频繁的日常生活活动中，对4名患者进行了髋关节接触力测量和步态模式和地面反作用力的同步分析。根据单个数据集计算平均值。本文重点关注股骨植入物组件的载荷，但完整数据额外存储在相关光盘上。它包含完整的步态和髋关节接触力数据，以及在行走和爬楼梯期间计算的肌肉活动和髋关节患者中观察到的日常活动频率。从而完整记录了髋关节和股骨近端的机械载荷和功能。当以约4 km/h行走时，平均患者的髋关节负荷为238%BW（体重百分比），单腿站立时负荷略低。这低于先前报道的另外两名患者的水平（Bergmann等人，临床生物力学26（1993）969-990）。当爬上楼梯时，关节接触力为251%BW，低于下楼时的260%BW。植入物的向内扭转可能是股骨柄固定的关键。平均而言，上楼时比正常水平行走时大23%。爬楼梯过程中的个体间和个体内变化很大，最高扭矩值比正常行走时大83%。因为髋关节负荷：在大多数髋关节患者的所有其他常见活动都非常小的情况下（除了绊倒），植入物主要应在模拟行走和爬楼梯的载荷条件下进行测试。(C)2001爱思唯尔科技有限公司版权所有。
In vivo loads acting at the hip joint have so F;rr only been measured in few patients and without detailed documentation of gait data. Such information is required to test and improve wear, strength and fixation stability of hip implants. Measurements of hip contact forces with instrumented implants and synchronous analysts of gait patterns and ground reaction forces were performed in four patients during the most frequent activities of daily living. From the individual data sets an average was calculated. The paper focuses on the loading of the femoral implant component but complete data are additionally stored on an associated compact disc. It contains complete gait and hip contact force data as well as calculated muscle activities during walking and stair climbing and the frequencies of daily activities observed in hip patients. The mechanical loading and function of the hip joint and proximal femur is thereby completely documented. The average patient loaded his hip joint with 238% BW (percent of body weight) when walking at about 4 km/h and with slightly less when standing on one leg. This is below the levels previously reported for two other patients (Bergmann et al., Clinical Biomechanics 26 (1993) 969-990). When climbing upstairs the joint contact force is 251% BW which is less than 260% BW when going downstairs. Inwards torsion of the implant is probably critical For the stem fixation. On average it is 23% larger when going upstairs than during normal level walking. The inter- and intra-individual variations during stair climbing are large and the highest torque values are 83% larger than during normal walking. Because the hip joint loading: during all other common activities of most hip patients are comparably small (except during stumbling), implants should mainly; be tested with loading conditions that mimic walking and stair climbing. (C) 2001 Elsevier Science Ltd. All rights reserved.