Unlockable knee joint mechanism for powered gait orthosis
Unlockable knee joint mechanism for powered gait orthosis
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用于动力步态矫形器的可解锁膝关节机构
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
K. Kim
中科院分区：
文献类型：
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作者：
Gyoosuk Kim;S. Kang;Sungjae Kang;J. Ryu;M. Mun;K. Kim
走路时锁住膝关节会增加骨盆倾斜的幅度，导致步态不自然。本文介绍了一种带活动膝关节的动力式步态矫形器，用于提高脊髓损伤患者的步态速度。可解锁的膝关节动力步态矫形器（UKJ-PGO）使用气弹簧气缸和电磁锁紧装置来实现关节的屈曲，而髋关节装置的刚性则使用空气肌肉来增强。通过步态分析评价UKJ-PGO的性能，并与标准PGO的运动学参数进行了比较。在使用UKJ-PGO的脊髓损伤患者的步态中，与标准PGO步态相比，新的膝关节装置在摆动阶段实现了屈曲，并显示骨盆倾斜减少。由于膝关节可能有更大的屈曲，站立阶段的持续时间大大减少到接近正常值，而摆动阶段的持续时间相应增加。此外，使用UKJ-PGO的步态比使用标准PGO的步态更快。
Walking with the knee joint locked increases the amplitude of pelvic tilt and results in an unnatural gait. This paper introduces a powered gait orthosis with a moveable knee joint designed to improve the gait speed of patients with spinal cord injury (SCI). The unlockable knee joint powered gait orthosis (UKJ-PGO) uses a gas spring cylinder and a solenoid locking device to enable flexion of the joint, while the rigidity of the hip-joint device is enhanced using air muscles. A gait analysis was conducted to evaluate the performance of the UKJ-PGO, and the kinematic parameters obtained were compared with those of a standard PGO. In the gait of SCI patients using the UKJ-PGO, the new knee-joint device enabled flexion during the swing phase and showed a decrease in pelvic tilt compared with the standard PGO gait. As greater flexion was possible at the knee joint, the duration of the stance phase substantially decreased to near to the normal value, and the duration of the swing phase increased accordingly. In addition, the gait using the UKJ-PGO was faster than that with the standard PGO.