Actively Recruiting
A Biomechanical Evaluation of the Ossur Power Knee in Persons With Transfemoral Amputation
Led by VA Office of Research and Development · Updated on 2025-09-09
20
Participants Needed
1
Research Sites
156 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Microprocessor-controlled knees (MPKs) do not typically utilize motors to power joint rotation, but they automatically adjust resistance or damping in the joint to improve swing- and/or stance-phase control as appropriate for the prosthesis user during gait. The Ossur Power Knee is the only commercially-available MPK that uses a motor to provide active power generation during walking and other activities. The purpose of this proposed investigation is to perform and compare biomechanical evaluations of the Power Knee and Ossur Rheo XC, a passive MPK, during walking and other activities by prosthesis users. Furthermore, mobility between male and female subjects will be compared to determine if there are differences in prosthetic knee usage on the basis of sex.
CONDITIONS
Official Title
A Biomechanical Evaluation of the Ossur Power Knee in Persons With Transfemoral Amputation
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Unilateral, transfemoral amputation (any cause).
- Age between 45 and 75 years.
- Residual limb length classified as standard (medium) to long.
- Prosthesis use for at least 1 year before joining the study.
- Ambulatory at K3 or K4 activity level.
- Good sensation on residual limb as confirmed by clinical exam.
- Good skin condition upon visual check.
- Able to walk short distances without assistive devices.
- Not taking medications that affect balance or walking.
- Good prosthetic socket fit confirmed by study prosthetist.
You will not qualify if you...
- Bilateral amputations.
- Individuals with knee disarticulation.
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Trial Site Locations
Total: 1 location
1
Jesse Brown VA Medical Center, Chicago, IL
Chicago, Illinois, United States, 60612
Actively Recruiting
Research Team
R
Rebecca Stine, MS
CONTACT
S
Steven A Gard, PhD
CONTACT
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
CROSSOVER
Primary Purpose
TREATMENT
Number of Arms
2
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