PDF(Sci-hub)
Abstract：
UNASSIGNED: Asymmetrical limb loading is believed to cause health problems for lower limb amputees and is exacerbated when walking on slopes. Hydraulically damped ankle-feet improve ground compliance on slopes compared to conventional prosthetic feet. Microprocessor-controlled hydraulic ankle-feet provide further adaptation by dynamically adjusting viscoelastic damping properties.
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.
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.
摘要：
■不对称的肢体负荷被认为会导致下肢截肢者的健康问题，并且在斜坡上行走时会加剧。与传统的假足相比，液压阻尼的踝足改善了斜坡上的地面顺应性。微处理器控制的液压踝足通过动态调节粘弹性阻尼特性提供进一步的适应。
■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。
■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。
