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J Biomech. 2011 Sep 23;44(14):2572-5. doi: 10.1016/j.jbiomech.2011.07.016. Epub 2011 Aug 9.

Amputee Independent Prosthesis Properties--a new model for description and measurement.

Author information

1
Northwestern University Prosthetics-Orthotics Center, Northwestern University, Chicago, IL 60611, USA. MatthewJ.Major@Gmail.com

Abstract

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.

PMID:
21831379
DOI:
10.1016/j.jbiomech.2011.07.016
[Indexed for MEDLINE]

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