Yakimovich Terris, Kofman Jonathan, Lemaire Edward D
Ottawa Health Research Institute, The Rehabilitation Centre (Ottawa Hospital), Ottawa, ON, K1H 8M2, Canada.
IEEE Trans Neural Syst Rehabil Eng. 2006 Sep;14(3):361-9. doi: 10.1109/TNSRE.2006.881578.
Conventional knee-ankle-foot orthoses (KAFOs) are prescribed for people with knee-extensor muscle weakness. However, the orthoses lock the knee in full extension and, therefore, do not permit a natural gait pattern. A new electromechanical stance-control knee-ankle-foot orthosis (SCKAFO) knee joint that employs a novel friction-based belt-clamping mechanism was designed to enable a more natural gait. The SCKAFO knee joint allows free knee motion during swing and other non-weight-bearing activities and inhibits knee flexion while allowing knee extension during weight bearing. A prototype SCKAFO knee joint was mechanically tested to determine the moment at failure, loading behavior, and wear resistance. The mean maximum resisting moment of the SCKAFO knee joint over five loading trials was 69 Nm +/- 4.9 Nm. The SCKAFO knee-joint strength and performance were sufficient to allow testing on a 90 kg subject at normal walking cadence. Proper function of the new electromechanical knee joint was verified in walking trials of an able-bodied subject.
传统的膝-踝-足矫形器（KAFO）是为膝关节伸肌肌无力的患者开具的。然而，这种矫形器会将膝关节锁定在完全伸展状态，因此不允许自然的步态模式。一种新型的机电式站立控制膝-踝-足矫形器（SCKAFO）膝关节采用了一种基于摩擦的新型皮带夹紧机制，旨在实现更自然的步态。SCKAFO膝关节在摆动和其他非负重活动期间允许膝关节自由运动，并在负重时抑制膝关节屈曲，同时允许膝关节伸展。对一个SCKAFO膝关节原型进行了力学测试，以确定其失效时的力矩、加载行为和耐磨性。在五次加载试验中，SCKAFO膝关节的平均最大抵抗力矩为69 Nm±4.9 Nm。SCKAFO膝关节的强度和性能足以允许在一名体重90公斤的受试者以正常步行节奏进行测试。在一名身体健全的受试者的步行试验中验证了新型机电膝关节的正常功能。
