A therapeutic shoe that helps stroke patients regain walking skills
is expected to become commercially available this year. In a recent
trial, the iStride device measured up to split-belt machines used in
gait rehabilitation, say the developers.
The patented iStride, created by University of South Florida
engineers, is strapped onto the “good” foot of a stroke patient and
exaggerates the existing step motion. This awkward movement strengthens
the stroke-impacted leg. Meanwhile, a stationary companion shoe balances
out leg height during during treatment. When the shoes are removed, the
gait becomes more symmetrical, reported developer Kyle Reed, Ph.D., a
professor of mechanical engineering.
The shoe is easy for the wearer to use when compared to other gait
retraining devices, and can be worn in varied environments, Reed said.
“Since the motion is generated by the wearer’s force, the person is in
control, which allows easier adaptation,” he explained. “Unlike many of
the existing gait rehabilitation devices, this device is passive,
portable, wearable and does not require any external energy.”
The shoe was recently tested in a trial of six older adults who had
significant gait problems after suffering a stroke. All participants
improved gait symmetry and speed. They took less time to stand and walk
from a sitting position, less time to walk to a set location and covered
more distance in six minutes. The shoe also helped to strengthen double
limb support in some patients, a result not seen in a split-belt
machine trial, Reed added.
A demonstration of the shoe in action can be seen in
this news video from ABC-affiliated KSAT 12, San Antonio.
Results from the clinical trial were published in the August issue of the
Journal of NeuroEngineering and Rehabilitation.
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