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Prediction Of Prosthetic Socket Fit Of Trans-Tibial Amputee With The Aid Of Computational Modeling

Lee, Winson C.C., Zhang, Ming, & Mak, Arthur F.T. (2004) Prediction Of Prosthetic Socket Fit Of Trans-Tibial Amputee With The Aid Of Computational Modeling. In BME 2004 "Integrating Science and Technology in the Healthcare Industry".

Abstract

This study aims to investigate the pain-pressure relationship of the residual limb and the interface pressure at the prosthetic socket-residual limb interface during walking. Load was indented to different regions of the residual limb through Pelite and polypropylene indenters connected to a force transducer until pain was just perceived. A finite element (FE) model was built simulating the indentation process to evaluate the pressure distribution beneath the indenter upon indentation. Results suggested that pain is triggered when the applied peak pressure overshot a certain threshold. A second FE model was built to predict the socket-limb interface pressure, considering friction/slip and pre-stress produced by donning the limb into a shape-modified socket which were commonly ignored in previous models under simplifying assumptions. The predicted interface pressure was in the range of previous clinical pressure measurement and was below the thresholds causing pain. In future investigations, more subjects will be involved for the pain-pressure relationship and more analysis on interface pressure under different conditions, such as alignment, walking speed and style, will be performed.

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ID Code: 2956
Item Type: Conference Paper
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Rehabilitation Engineering (090305)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2004 (please consult author)
Deposited On: 19 Dec 2005
Last Modified: 11 Aug 2011 04:37

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