UNASSIGNED: Using a case series design, gait analysis was performed with four trans-tibial amputees. There were two walking conditions (ramp ascent and descent) and two prosthetic foot conditions (microprocessor-control on and off - MPF-on and MPF-off). Total support moment integral ( M I sup ) and degree-of-asymmetry were compared across foot conditions.
UNASSIGNED: During ramp descent, the transition of prosthetic ankle moment from dorsiflexion to plantarflexion occurred earlier in stance phase with MPF-on, slowing the angular velocity of the shank. During ramp ascent, the MPF-on dorsiflexion/plantarflexion moment transition occurred later, meaning less resistance to shank rotation in early stance and increasing walking speed by up to 6%. For both slope conditions, sound limb M I sup was universally decreased with MPF-on (4-13% descent, 3-11% ascent).
UNASSIGNED: Microprocessor-control of hydraulic ankle-feet reduced the total loading of the sound limb joints, for both walking conditions, for all participants. This may have beneficial consequences for long-term joint health and walking efficiency.
■使用案例系列设计,对4名经胫骨截肢者进行步态分析.有两种行走条件(斜坡上升和下降)和两种假脚条件(微处理器控制开和关-MPF开和关)。在足部条件下比较了总支撑力矩积分(MIsup)和不对称程度。
■在斜坡下降期间,假肢踝关节力矩从背屈过渡到plant屈发生在站立阶段较早,减慢柄的角速度。在斜坡上升期间,MPF-背屈/前屈力矩转变发生较晚,这意味着在早期站立时对小腿旋转的阻力较小,行走速度提高了6%。对于两种斜坡条件,肢体MIsup随着MPF的开启而普遍下降(下降4-13%,3-11%上升)。
■液压踝足的微处理器控制减少了健全肢体关节的总负荷,对于两种行走条件,对于所有参与者。这可能对长期的关节健康和步行效率具有有益的后果。