Actively Recruiting
Evaluation of Functional Performance of Persons With Limb Differences to Optimize Pattern Recognition Control of Powered Upper Limb Prosthesis
Led by Liberating Technologies, Inc. · Updated on 2025-09-03
32
Participants Needed
2
Research Sites
N/A
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are evaluating how different myoelectric control settings affect the functional performance of individuals aged 18 years or older with upper limb absence at the transradial level. This study aims to test whether common assumptions about the number and placement of muscle sensors translate to real-world use when wearing a physical prosthesis. The study focuses on functional outcomes such as the Assessment of Capacity for Myoelectric Control (ACMC) and other performance tests to understand prosthesis control better. Participants will be part of a randomized crossover study comparing four different sensor channel conditions: 4 untargeted channels, 8 untargeted channels, up to 16 untargeted channels, and 8 targeted channels. Experimental sockets with these configurations will be custom-made for each participant. The Coapt Pattern Recognition control system and Coapt EMG Cuff device will be used for both in-lab testing and at-home practice. Between visits, participants will play virtual games with the EMG Cuff to improve muscle control. Participants will attend up to five in-lab sessions lasting about four hours each, spaced 1 to 2 weeks apart. During visits, they will wear the assigned socket, complete training and functional outcome tests like the ACMC, and provide feedback through surveys. The study includes monitoring during sessions, optional breaks, and potential additional visits if needed. The total study duration depends on participant scheduling and adherence to the virtual training program at home.
CONDITIONS
Brief Title
Effects of Myoelectric Channel Count and Targeting for Upper Limb Prosthetic Control
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Unilateral transradial level limb absence
- Current or past user of myoelectric controlled prostheses
- Six months or more post-amputation
- Adequate limb length to fit a wrist rotation device in the check socket
- Well-fitting socket with a Socket-Comfort Score of 6 or above
- Capable of wearing and operating a prosthesis with wrist rotator and multi-articulating hand
- Able to understand and follow multi-step instructions and complete study tasks
- English speaking
You will not qualify if you...
- Significant new injury preventing consistent prosthesis use and performing daily living activities
- Cognitive impairment affecting understanding, compliance, communication, or ability to give informed consent
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 screening and enrollment visit
Duration - First visit
Participants will be fit with two experimental sockets: one with targeted EMG channels and one with untargeted EMG channels. The Coapt EMG Cuff will also be provided for home use.
1 in-person visit
Duration - Up to 10 weeks (5 sessions spaced approximately 1-2 weeks apart)
Participants attend up to 5 in-lab sessions to test different EMG channel configurations in a randomized order. Each session includes training, calibration, and functional outcome testing using the experimental socket for the assigned condition.
Up to 5 in-person visits lasting about 4 hours each
Duration - Approximately 1-2 weeks between visits
Between in-lab visits, participants practice using the Coapt EMG Cuff and play virtual games for 15 minutes a day, 3 days a week to improve control in a virtual environment.
Home-based practice sessions as instructed
Trial Site Locations
Total: 2 locations
1
Shirley Ryan AbilityLab
Chicago, Illinois, United States, 60611
Actively Recruiting
2
Liberating Technologies, Inc.
Holliston, Massachusetts, United States, 01746
Not Yet Recruiting
Research Team
B
Brianna Rozell
C
Craig Kelly
How is the study designed?
Study Type
INTERVENTIONAL
Masking
DOUBLE
Allocation
RANDOMIZED
Model
CROSSOVER
Primary Purpose
BASIC_SCIENCE
Number of Arms
5
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