Journal of Rehabilitation Research & Development (JRRD)

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A portable powered ankle-foot orthosis for rehabilitation

K. Alex Shorter, PhD, et al.


Figure 1. First prototype of portable powered ankle-foot orthosis. Rotary actuator is powered with a compressed carbon dioxide (CO2) bottle (far right) worn by subject on waist.

Ankle-foot orthoses (AFOs) are used to ameliorate lower-limb neuromuscular impairments in gait. In this article, we present a novel portable powered AFO (PPAFO) to provide untethered assistance for daily at-home rehabilitation treatment. The PPAFO provides torque assistance with a bidirectional pneumatic rotary actuator. We collected experimental data from one impaired and three nondisabled subjects to demonstrate design functionality. Data from nondisabled walkers demonstrated that the PPAFO provided correctly timed assistance. Additionally, data from the impaired walker demonstrated that the PPAFO provided functional plantar flexor assistance. The PPAFO opens opportunities for new orthotic and clinical treatment strategies.

Volume 48 Number 4, 2011
   Pages 459 — 472


View HTML  ¦  View PDF  ¦  Contents Vol. 48, No. 4
This article and any supplementary material should be cited as follows:
Shorter KA, Kogler GF, Loth E, Durfee WK, Hsiao-Wecksler ET. A portable powered ankle-foot orthosis for rehabilitation. J Rehabil Res Dev. 2011;48(4):459-72.
DOI:10.1682/JRRD.2010.04.0054
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Last Reviewed or Updated  Friday, May 13, 2011 9:18 AM

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