Testing Prosthetic Foot Designs to Improve Stability and Reduce Falls in Veterans With Below-Knee Amputations

What this Trial Is About

Researchers are evaluating how different prosthetic feet affect stability and fall-related outcomes in Veterans with below-knee leg amputations. The study aims to improve understanding of how a customizable robotic prosthetic foot emulator PFE can help predict which commercial prosthetic feet best support stability, balance confidence, and functional mobility. This research focuses on optimizing prosthetic prescription strategies to enhance quality of life and reduce falls for people with lower leg amputations. Participants will use the multiaxial Prosthetic Foot Emulator, which mimics the mechanical properties of various commercial prosthetic feet, during walking tests on different surfaces like inclines and uneven ground. The study involves a randomized, participant-blinded crossover design where Veterans will test three different foot modes with the PFE and three corresponding actual commercial prosthetic feet. After initial testing, participants will wear each commercial foot at home and in the community for about one week before switching to the next foot. During up to six study visits, participants will complete walking tests, self-report surveys, and performance-based assessments such as the Narrowing Beam Walking Test and Four Square Step Test. Researchers will measure perceived stability, balance confidence, and biomechanical stability outcomes. The study includes both laboratory assessments and real-world use of prosthetic feet, with follow-up testing to evaluate longer-term effects. Total study participation spans multiple weeks with repeated measurements to capture comprehensive stability and functional outcomes.

A Prosthetic Foot Test-Drive Strategy for Improving Stability in Veterans With Leg Amputations