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Open Access Functional Differences of Bilateral Transfemoral Amputees Using Full-Length and Stubby-Length Prostheses

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Many unilateral amputations are followed by a contralateral amputation within three years, sometimes presenting as bilateral transfemoral amputations. Bilateral transfemoral amputees that successfully use prostheses are an understudied patient population. This study establishes reference values for this population in users of short non-articulating (stubby) or full-length articulating prostheses. Anthropometric and demographic information was collected from participants. Additionally, participants completed a self-reported Prosthesis Evaluation Questionnaire–Mobility Subscale 12/5 (PEQ-MS) and performed multiple physical mobility tests, including walking tests and the multi-directional Four Square Step Test (FSST). Full-length users rated their abilities to complete the PEQ-MS tasks as less difficult than stubby users in eight of the 12 items. Gait analysis revealed a greater amount of time is spent in stance phase with a greater portion in double limb support for both user groups, and a greater percentage in stance phase for the subject-reported dominant limb. Stubby users' gait velocity had a significant reduction from that of their full-length peers; however, cadence was similar between groups. Both user groups completed the FSST at comparable times. These outcomes may be of benefit for identifying tasks bilateral transfemoral prosthetic users may find to be most difficult as well as for identifying normal ambulation patterns within this population. Future studies with a greater number of subjects would enable these results to be further generalized.
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Keywords: ABOVE KNEE; AMPUTATION; AMPUTEE; BILATERAL; DOUBLE; FOUR SQUARE STEP TEST; GAIT; PROSTHESES; PROSTHESIS EVALUATION QUESTIONNAIRE; PROSTHETIC; REHABILITATION; STUBBIES; TEMPEROSPATIAL; TRANSFEMORAL

Document Type: Research Article

Publication date: 01 November 2018

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  • Technology and Innovation, edited and published by the National Academy of Inventors, is a forum for presenting information encompassing the entire field of applied sciences, with a focus on transformative technology and academic innovation. Regular features of T&I include commentaries contributed by the United States Patent and Trademark Office (USPTO) and in-depth profiles of Fellows of the National Academy of Inventors in every issue.

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