Journal of Rehabilitation Research & Development (JRRD)

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Volume 49 Number 6, 2012
   Pages 843 — 854

Abstract — Perception of socket alignment perturbations in amputees with transtibial prostheses

David A. Boone, PhD;1–2* Toshiki Kobayashi, PhD;1–2 Teri G . Chou, PhD;1 Adam K. Arabian, PhD;1 Kim L. Coleman, MS;1 Michael S. Orendurff, PhD;1 Ming Zhang, PhD2
1Orthocare Innovations, Mountlake Terrace, WA; 2Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, People’s Republic of China

Abstract — A person with amputation’s subjective perception is the only tool available to describe fit and comfort to a prosthetist. However, few studies have investigated the effect of alignment on this perception. The aim of this article is to determine whether people with amputation could perceive the alignment perturbations of their prostheses and effectively communicate them. A randomized controlled perturbation of angular (3 and 6 degrees) and translational (5 and 10 mm) alignments in the sagittal (flexion, extension, and anterior and posterior translations) and coronal (abduction, adduction, and medial and lateral translations) planes were induced from an aligned condition in 11 subjects with transtibial prostheses. The perception was evaluated when standing (static) and immediately after walking (dynamic) using software that used a visual analog scale under each alignment condition. In the coronal plane, Friedman test demonstrated general statistical differences in static (p < 0.001) and dynamic (p < 0.001) measures of perceptions with angular perturbations. In the sagittal plane, it also demonstrated general statistical differences in late-stance dynamic measures of perceptions (p < 0.001) with angular perturbations, as well as in early-stance dynamic measures of perceptions (p < 0.05) with translational perturbations. Fisher exact test suggested that people with amputation’s perceptions were good indicators for coronal angle malalignments but less reliable when defining other alignment conditions.

Key words: alignment, amputation, below-knee prosthesis, instrumentation, malalignment, perception, pressure, socket, transtibial prosthesis, visual analog scale.

View HTML  ¦  View PDF  ¦  Contents Vol. 49, No. 6
This article and any supplementary material should be cited as follows:
Boone DA, Kobayashi T, Chou TG, Arabian AK, Coleman KL, Orendurff MS, Zhang M. Perception of socket alignment perturbations in amputees with transtibial prostheses. J Rehabil Res Dev. 2012;49(6):843–54.

Last Reviewed or Updated  Thursday, August 16, 2012 11:29 AM

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