Transfemoral Amputation
Conditions
Keywords
Transfemoral Amputation, Bionic Prosthesis, Knee Prosthesis
Brief summary
The purpose of this study is to evaluate the performance and adaptability of a neural-controlled powered knee or ankle prosthesis across diverse real-world mobility tasks. This research aims to assess how compare the sense of embodiment with the device, symmetry, and stability of a person with an lower-extremity amputation walking with a bionic prosthesis and their prescribed prosthesis. Findings from this study will inform future developments in bionic prosthesis design with optimal integration with the human body, with the goal of improving prosthetic integration into daily life.
Interventions
DEVICEMIT Powered Leg
MIT powered knee prosthesis developed by the MIT Biomechatronics Group.
Sponsors
Massachusetts Institute of Technology
Study design
Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* Male or Female age 18-70. * The patient must have a unilateral transfemoral amputation . * The patient must have the ability to ambulate at variable cadence (an expected lower extremity prosthesis functional level of K3 or above). * The patient must have adequate socket to support the device.
Exclusion criteria
* Women who are pregnant. * Severe co morbidity, atypical skeletal anatomy, or poor general physical/mental health that, in the opinion of the Investigator, will not allow the subject to be a good study candidate (i.e. other disease processes, mental capacity, substance abuse, shortened life expectancy, vulnerable patient population, BMI \>40, etc.).
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Kinematic and Kinetic Measures of Lower-Limb Biomechanics | An average of 2 sessions in the span of 1 week | Quantitative analysis of lower-limb biomechanics, including joint angles, ground reaction forces, joint torques, and mechanical power during level-ground walking, stair negotiation, and other functional tasks. Outcomes will be assessed using a motion capture system (e.g., Vicon), instrumented force plates, and embedded prosthesis sensors to evaluate gait symmetry, stability, and mechanical efficiency. |
| Spatiotemporal Gait Parameters | An average of 2 sessions in the span of 1 week | Evaluation of spatiotemporal gait parameters during ambulation with the powered prosthesis. Specific measures include stride length, cadence, walking speed, and stance-to-swing ratio. Parameters will be obtained using a motion capture system (e.g., Vicon) and an instrumented walkway. Data will be analyzed to assess functional walking ability and compared to normative or baseline values |
| Assessment of Patient Ability to Control each Joint of the Prosthesis | An average of 2 sessions in the span of 1 week | Assessment of volitional control of the powered knee and ankle joints via neural signals from the residual limb. Participants will perform isolated joint control trials in seated positions. Outcomes include joint command accuracy, latency, and repeatability, evaluated using surface electromyography (EMG) and motion capture. These measures will quantify the participant's ability to intentionally control each prosthetic joint. |
Countries
United States
Contacts
Primary ContactJohn A McCullough, B.S. Mechanical Engineering
Outcome results
None listed