An investigation into the relationship between knee axis alignment and swing phase whip during trans-femoral amputee gait

Qa'dan, WN 2010, An investigation into the relationship between knee axis alignment and swing phase whip during trans-femoral amputee gait , MSc by research thesis, University of Salford.

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Abstract

Lateral whip, which is defined as sideward motion of the prosthetic heel away from the line of progression during swing phase of gait, is one of the common gait deviations that trans-femoral amputees exhibit during walking. It poses several negative gait characteristics to trans-femoral amputees. Changing the prosthetic knee axis alignment in the coronal and transverse plane so that it is adducted (moved downwards medially) and / or externally rotated (moved backwards laterally) is hypothesised to reduce lateral whip. This thesis tests and discusses this hypothesis and the effects of changing prosthetic knee axis alignment on the general gait pattern of trans-femoral amputees. One trans-femoral amputee who had his limb amputated due to chondro-fibro sarcoma participated in the current study. Infra-red camera system and force plates were used to collect kinematic and kinetic data of the gait of the amputee participant under four different alignment conditions. The effects of changing prosthetic knee axis alignment in the coronal and transverse plane on lateral whip gait deviation in particular and on the gait pattern in general, were analysed. The four alignment conditions are: A) Standard - 00° adduction - 05°external rotation B) Adduction - 20° adduction 05° external rotation C) Rotation - 00° adduction - 10° external rotation D) Adduction & Rotation - 20° adduction 10° external rotation Walking trials under each alignment condition were first analysed using Qualisys Track Manager (QTM, Qualisys Sweden). Data filtering and gait parameters calculation were obtained using Visual 3D software (C-motion, USA). The data were then statistically processed using SPSS (SPSS Inc, USA). It was found that conditions (B, C and D) resulted in a significant reduction in lateral whip, with condition (C) resulting in the largest reduction. The reduction in lateral whip is most likely to be the result of significantly increased external rotation (reduction of internal rotation) of prosthetic side hip joint that occurred in swing in conditions (B, C and D). Conditions (B and D) however, caused maximum knee flexion during swing to be significantly less than in conditions A and C. Another finding was that the pelvis of the amputee subject is significantly more anteriorly rotated than in condition A.

Item Type: Thesis (MSc by research)
Contributors: Twiste, M (Supervisor) and Howard, D (Supervisor)
Schools: Schools > School of Health and Society
Funders: University of Jordan
Depositing User: Institutional Repository
Date Deposited: 19 Aug 2021 08:08
Last Modified: 27 Aug 2021 21:57
URI: http://usir.salford.ac.uk/id/eprint/61636

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