An articulated ankle-foot orthosis with adjustable plantarflexion resistance, dorsiflexion resistance and alignment: A pilot study on mechanical properties and effects on stroke hemiparetic gait.
An articulated ankle-foot orthosis with adjustable plantarflexion resistance, dorsiflexion resistance and alignment: A pilot study on mechanical properties and effects on stroke hemiparetic gait.
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DOI：
10.1016/j.medengphy.2017.02.012
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发表时间：
2017-06
影响因子：
2.2
通讯作者：
Foreman KB
中科院分区：
文献类型：
--
作者：
Kobayashi T;Orendurff MS;Hunt G;Lincoln LS;Gao F;LeCursi N;Foreman KB
关节式踝足矫形器（AFO）的力学性能与卒中后个体的步态表现密切相关。本文介绍了一种新型的关节式踝足矫形器的机械性能，可调跖屈阻力，背屈阻力和对齐，其对踝关节和膝关节运动学和动力学的影响，在一个中风后步态的初步研究。对AFO的力学性能进行了量化。在12种不同的AFO机械性能设置下[即4种跖屈阻力（P1<P4），4种背屈阻力（D1<D4），4种初始对齐（A1<A4）]，使用3D运动捕获系统和分离式带器械跑步机进行步态分析。AFO表现出系统性的变化，力矩角关系的变化，在AFO关节设置的变化。步态分析表明，踝关节和膝关节的角度和力矩的AFO关节设置的变化作出反应。初始接触时的平均踝关节角度从−0.86°（P1）变为0.91°（P4），从−1.48°（A1）变为4.45°（A4），而站立中期时的平均峰值背屈角度从12.01°（D1）变为6.40°（D4）。新型关节式踝足矫形器对脑卒中患者下肢关节运动学和步态动力学的影响是有效的。
Mechanical properties of an articulated ankle-foot orthosis (AFO) are closely related to gait performance in individuals post-stroke. This paper presents a pilot study on the mechanical properties of a novel articulated AFO with adjustable plantarflexion resistance, dorsiflexion resistance and alignment, and its effect on ankle and knee joint kinematics and kinetics in an individual post-stroke during gait. The mechanical properties of the AFO were quantified. Gait analysis was performed using a 3D motion capture system with a split-belt instrumented treadmill under 12 different settings of the mechanical properties of the AFO [i.e. 4 plantarflexion resistances (P1<P4), 4 dorsiflexion resistances (D1<D4), 4 initial alignments (A1<A4)]. The AFO demonstrated systematic changes in moment-angle relationship in response to changes in AFO joint settings. The gait analysis demonstrated that the ankle and knee angle and moment were responsive to changes in the AFO joint settings. Mean ankle angle at initial contact changed from −0.86° (P1) to 0.91° (P4) and from −1.48° (A1) to 4.45° (A4), while mean peak dorsiflexion angle changed from 12.01° (D1) to 6.40° (D4) at mid-stance. The novel articulated AFO appeared effective in influencing lower-limb joint kinematics and kinetics of gait in the individual post-stroke.