Traumatic Amputation of Lower Extremity Clinical Trial
Official title:
Effects of Wearing a Powered Ankle-Foot Prosthesis on Amputee Walking
Amputees wearing a conventional prosthesis require 20-30% more metabolic energy to walk at
the same speeds as non-amputees and this discrepancy is more apparent at faster walking
speeds. Amputees choose to walk at speeds 30-40% slower than non-amputees. Preferred walking
speed is likely influenced by elevated metabolic energy, but the underlying reason for
slower preferred walking speeds is not fully understood. Unilateral amputees exhibit highly
asymmetrical gait patterns that likely require more metabolic energy and impair functional
mobility, increasing the risk of degenerative joint disease, osteo-arthritis and lower back
pain. Improvements in prosthetic devices could enhance mobility in amputees, thus positively
effecting rehabilitation and ambulation in veterans. A prosthesis that allows amputees to
reduce metabolic energy would be especially useful for rehabilitation in older, ill
individuals with reduced exercise capacities and could literally restore walking ability in
people that are currently non-ambulatory.
Hypotheses. Amputees wearing the Massachusetts Institute of Technology (MIT) Powered
Ankle-Foot (PAF) prosthesis will have a lower metabolic cost, faster preferred walking
speed, and improved gait symmetry during walking than amputees wearing a conventional
prosthesis and will have nearly the same metabolic cost, preferred walking speed, and gait
symmetry during walking as age, gender, height, and weight matched non-amputees.
n/a
Allocation: Non-Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Factorial Assignment, Masking: Open Label, Primary Purpose: Basic Science
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