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2010 Design of Medical Devices Conference Abstracts

Feasibility and Design of a Low-Cost Prosthetic Knee Joint Using a Compliant Member for Stance-Phase Control OPEN ACCESS

[+] Author and Article Information
Daniel G. Harrison, William L. Cleghorn

University of Toronto

Jan Andrysek

Bloorview Research Institute

J. Med. Devices 4(2), 027541 (Aug 12, 2010) (1 page) doi:10.1115/1.3454861 History: Published August 12, 2010

Abstract

This paper is concerned with the feasibility and design of a low-cost prosthetic knee joint that uses a compliant member for stance-phase control. A mechanical locking mechanism was used in conjunction with a compliant control axis to achieve automatic stance-phase locking. The concept was developed with the aid of computer-aided engineering software and was validated through the fabrication and testing of a simplified prototype made of an injection moldable polymer. A prosthetic knee joint was then designed, incorporating the compliant member concept. After modeling, fabrication, and laboratory testing, a pilot study was conducted in a clinical setting. A simple gait analysis showed asymmetric gait patterns that demonstrated the need for improved swing-phase control and damping, while qualitative feedback indicated the desire to reduce the noise produced by the knee. The knee provided the automatic stance-phase control for which it was designed and shows significant potential to evolve into a highly functioning, low-cost knee.

Copyright © 2010 by American Society of Mechanical Engineers
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