Journal
JOURNAL OF BIOMECHANICS
Volume 44, Issue 14, Pages 2572-2575Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2011.07.016
Keywords
Trans-tibial; Amputee; Prosthesis; Mechanical properties
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Funding
- Whitaker International Fellows and Scholars Program of the USA
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A model is presented for describing the Amputee Independent Prosthesis Properties (AIPP) of complete assemblies of trans-tibial prosthetic components distal to the socket. This new AIPP model includes features of both lumped parameter and roll-over models and describes prosthesis properties that are of importance in stance phase, including prosthetic foot geometry, normal stiffness, shear stiffness, and damping (energy dissipation). Methods are described for measuring the parameters of the AIPP model using a custom test-rig, commercial load-cell, and a motion capture system. Example data are presented for five pylon angles reflecting the shank angles seen in normal gait. Through the inclusion of measured AIPP in future in-vivo studies comparing different prostheses more generic information, as opposed to product specific claims, will become more widely available to inform future designs, prescription, and alignment procedures. (C) 2011 Elsevier Ltd. All rights reserved.
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