A comparative study on the activity level of trans-tibial amputees with different prosthesis weights

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A comparative study on the activity level of trans-tibial amputees with different prosthesis weights


Author: Wong, Man-wai
Title: A comparative study on the activity level of trans-tibial amputees with different prosthesis weights
Degree: M.Sc.
Year: 2000
Subject: Amputees -- Rehabilitation
Artificial limbs
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Jockey Club Rehabilitation Engineering Centre
Pages: x, 132 leaves : ill. (some col.) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1541819
URI: http://theses.lib.polyu.edu.hk/handle/200/4617
Abstract: Laboratory assessments to an amputee's situation and rehabilitation progress are limited to a restricted and artificial area. The situation of a real life has a lot of varieties. A real and holistic outcome measurement can provide accurate information for understanding and monitoring the rehabilitation progress of an amputee. In clinical practice, patients with amputation at the lower extremity usually require prosthesis for locomotion. There is a common requirement to have a lighter prosthesis to minimize the energy consumption during walking and improve the prosthesis suspension. One of the methods to reduce the mass of an endoskeleton prosthesis is the application of light-weight titanium components. The actual clinical outcomes, especially in the walking activities of patients using prostheses of different weights were investigated in this study. The walking activities of 5 unilateral trans-tibial amputees using prostheses of different weights were measured by Step Activity Monitor developed by Prosthetics Research Study in 1997(Coleman et al. 1999). These amputees were blinded to the amount of weight change due to using of prosthetic components made by different materials (0.25% the body weight ranged from 116g---200g). Each amputee was measured for four trials and the period of each trial was four weeks. The number of foot steps taken per minute was recorded. The results obtained for the amputees using prostheses of different weights were compared. The amputee's subjective feelings about using the prosthesis were measured using the Prosthesis Evaluation Questionnaire that was developed by Prosthetics Research Study in1998(Legro et al.1998). The results showed that the activity levels were significantly different among trials that might not be due to the weight change of the prosthesis. There was no apparent improvement in activity level by reducing the weight of the prosthesis (0.25% of the body weight). It was shown that subjects were more satisfactory with using the light-weight prosthesis than the heavy-weight prosthesis from the subjective feedback.

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