The influence of a microprocessor-controlled hydraulic ankle on the kinetic symmetry of trans-tibial amputees during ramp walking: A case series:

Journal of Rehabilitation and Assistive Technologies Engineering

MichaelMcGrath¹ 

关键词: Microprocessor foot;    hydraulic ankle;    ramp;    symmetry;    support moment;   

DOI  :  10.1177/2055668318790650

学科分类：工程和技术（综合）

来源: Sage Journals

【 摘 要 】

IntroductionAsymmetrical 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.MethodUsing 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 (MIsup) and degree-of-asymmetry were compared across foot conditions.ResultsDuring 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, me...

【 授权许可】

CC BY