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Gait Biomechanics of Individuals With Transtibial Amputation: Effect of Suspension System Publisher Pubmed



Eshraghi A1 ; Abu Osman NA1 ; Karimi M2 ; Gholizadeh H1 ; Soodmand E3 ; Wan Abas WAB1
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Authors Affiliations
  1. 1. Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
  2. 2. Department of Orthotics and Prosthetics, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Human Locomotion, Technische Universitat Chemnitz, Chemnitz, Germany

Source: PLoS ONE Published:2014


Abstract

Prosthetic suspension system is an important component of lower limb prostheses. Suspension efficiency can be best evaluated during one of the vital activities of daily living, i.e. walking. A new magnetic prosthetic suspension system has been developed, but its effects on gait biomechanics have not been studied. This study aimed to explore the effect of suspension type on kinetic and kinematic gait parameters during level walking with the new suspension system as well as two other commonly used systems (the Seal-In and pin/lock). Thirteen persons with transtibial amputation participated in this study. A Vicon motion system (six cameras, two force platforms) was utilized to obtain gait kinetic and kinematic variables, as well as pistoning within the prosthetic socket. The gait deviation index was also calculated based on the kinematic data. The findings indicated significant difference in the pistoning values among the three suspension systems. The Seal-In system resulted in the least pistoning compared with the other two systems. Several kinetic and kinematic variables were also affected by the suspension type. The ground reaction force data showed that lower load was applied to the limb joints with the magnetic suspension system compared with the pin/lock suspension. The gait deviation index showed significant deviation from the normal with all the systems, but the systems did not differ significantly. Main significant effects of the suspension type were seen in the GRF (vertical and fore-aft), knee and ankle angles. The new magnetic suspension system showed comparable effects in the remaining kinetic and kinematic gait parameters to the other studied systems. This study may have implications on the selection of suspension systems for transtibial prostheses. Trial Registration: Iranian Registry of Clinical Trials IRCT2013061813706N1. © 2014 Eshraghi et al.
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