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Impact of Powered Knee-Ankle Prosthesis Leg on Everyday Community Mobility and Social Interaction
Sponsor: Shirley Ryan AbilityLab
Summary
The overall goal of this research is to determine the efficacy of new powered prosthetic devices for individuals with transfemoral amputations. The anticipation is that this will be a high-impact technological intervention with the potential to restore significant functionality to individuals with lower limb amputation and transform the field of lower limb prosthetics. The objective of the proposed clinical trial is to fully evaluate the biomechanical and energetic effects of using PKA prosthesis and quantify functional performance and quality of life changes.
Key Details
Gender
All
Age Range
18 Years - 80 Years
Study Type
INTERVENTIONAL
Enrollment
15
Start Date
2016-12
Completion Date
2025-12
Last Updated
2025-04-06
Healthy Volunteers
No
Conditions
Interventions
Vanderbilt Powered Knee-Ankle Prosthesis
The Vanderbilt powered prosthesis is a transfemoral prosthesis with powered and coordinated knee and ankle joints. The Generation 3 prosthesis is actuated by two brushless direct current (DC) motors, providing up to 100 Nm of torque at the knee joint, and with the assistance of a parallel stiffness, up to 200 Nm in plantar flexion at the ankle. Sensors measure knee and ankle joint angles, axial load in the shank, and position and orientation of the prosthesis in space (via a 6-axis inertial measurement unit). An onboard lithium-ion battery provides sufficient energy for approximately 10,000 steps between battery charges. The prosthesis prototype weighs approximately 4.3 kg (9.5 lb), the mass of which is approximately equivalent to the intact limb of a 48 kg (105 lb) person.
Microprocessor (MP) Knee Prosthesis
Participants enrolled will already have their own microprocessor controlled (MP) non-powered knee prostheses as per inclusion criteria. Examples: OttoBock's C-Leg, Ossur's Rheo, Freedom Plie, Endolite Orion,etc.
Locations (1)
Shirley Ryan AbilityLab
Chicago, Illinois, United States