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Transtibial amputee joint rotation moments during straight-line walking and a common turning task with and without a torsion adapter

Ava D. Segal, MS, et al.

Figure. (a) Rigid (left) and torsion adapter (right) used in presentstudy.

Walking at home and in the community requires frequent turning and twisting maneuvers. For veteran amputees who wear lower-limb prostheses, these activities can transmit large torsional loads onto the skin of their residual limb, which may contribute to discomfort and injury. This study showed that a torsion adapter, a springlike device mounted between the prosthetic socket and pylon, minimally affected transmitted torsional loads when an individual walked in a straight line. However, when the individual performed a turning maneuver, the torsion adapter reduced the transmitted torsional load compared with a standard rigid adapter. These results suggest that torsion adapters may benefit veteran lower-limb amputees walking in a household environment.


Volume 46 Number 3, 2009
   Pages 375 — 384


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