The purpose of this study is to develop criteria for prosthetic foot prescription for Veterans and Service Members with transtibial limb loss. The objectives are to: 1) Determine the appropriate functional outcome tests and measures to support the prescription of a type of Energy Storing and Returning (ESR) non-articulating, articulating or active plantarflexion prosthetic ankle-foot for a Veteran or Service Member with transtibial limb loss. 2) Correlate patient goals and subjective measures with objective data to determine the appropriate prosthetic ankle-foot category that will facilitate the greatest overall function to the user. 3) Develop criteria for the appropriate prescription of non-articulating ESR, articulating ESR, and active plantar flexion ESR ankle-foot units.
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Change in 6-min walk distance for each prosthetic foot type
Timeframe: Once per week, at Week 1, Week 2, and Week 3 after enrollment
Change in TUG times for each prosthetic foot type
Timeframe: Once per week, at Week 1, Week 2, and Week 3 after enrollment
Change in 4SST times for each prosthetic foot type
Timeframe: Once per week, at Week 1, Week 2, and Week 3 after enrollment
Change in AmpPRO for each prosthetic foot type
Timeframe: Once per week, at Week 1, Week 2, and Week 3 after enrollment
Change in Stair Assessment Index (SAI) for each prosthetic foot type
Timeframe: Once per week, at Week 1, Week 2, and Week 3 after enrollment
Change in Hill Assessment Index (HAI) for each prosthetic foot type
Timeframe: Once per week, at Week 1, Week 2, and Week 3 after enrollment
Change in Gait Evaluation for each prosthetic foot type
Timeframe: Once per week, at Week 1, Week 2, and Week 3 after enrollment