Article

Little research describes which transfemoral socket design features are important
for coronal plane stability, socket comfort, and gait. Our study objectives were
to (1) relate socket comfort during gait to a rank order of changes in ischial
containment (IC) and tissue loading and (2) compare socket comfort during gait
when tissue loading and IC were systematically manipulated. Six randomly assigned
socket conditions (IC and tissue compression) were assessed:
(1) IC and high, (2)
IC and medium, (3) IC and low, (4) no IC and high, (5) no IC and medium, and (6)
no IC and low. For the six subjects in this study, there was a strong, negative
relationship between comfort and changes in IC and tissue loading (rho = -0.89).
With the ischium contained, tissue loading did not influence socket comfort (p =
0.47). With no IC, the socket was equally comfortable with high tissue loading (p
= 0.36) but the medium (p = 0.04) and low (p = 0.02) tissue loading conditions
decreased comfort significantly. Coronal plane hip moments, lateral trunk lean,
step width, and walking speed were invariant to changes in IC and/or tissue
loading. Our results suggest that in an IC socket, medial tissue loading mattered
little in terms of comfort. Sockets without IC required high tissue loading to be
as comfortable as those with IC, while suboptimal tissue loading compromised comfort.

Langue : ANGLAIS