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Standing interface stresses as a predictor of walking interface stresses in the trans-tibial prosthesis
ZACHARIAH SG; SANDERS JE
PROSTHET ORTHOT INT , 2001, vol. 25, n° 1, p. 34-40 Doc n°: 101232 Localisation : Documentation IRR Descripteurs : EC16 -PROTHESE DE MEMBRE INFERIEUR Interface pressures and shear stresses within the socket, in standing and walking, were measured for two unilateral, male, trans-tibial amputee subjects, during two sessions each. The ratios of equal weight-bearing standing stresses to peak walking stresses showed regional variation, ranging from 0.24:1 for pressure over the anterior region to 1.01:1 for resultant interface shear stress over the lateral region. Interface stresses in standing were only moderate predictors of peak walking stresses. The best correlation coefficient between standing in full weight-bearing and peak walking stress was 0.88 for pressure over the lateral region. As the amputees progressed from minimal to full weight-bearing in standing, and then to walking, the interface stresses increased in a nonlinear fashion, consistent with the assumption that the anterior tibia provides much resistance to the bending moment in the sagittal plane during walking. Langue : ANGLAIS Identifiant basis : 2001217180 |
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