- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02349035
Application of Targeted Reinnervation for People With Transradial Amputation
Study Overview
Status
Detailed Description
Phase 1: Transradial amputees will be asked to come to the Rehabilitation Institute of Chicago, Walter Reed National Military Medical Center or the San Antonio Military Medical Center for initial fitting with a prosthetist for a multifunctional hand system or multifunctional hand and wrist system. The prosthesis system will consist of a custom-made socket and commercially available components. The first visit (up to five days)s involves casting, creating and fitting of a socket that will be used for the study. During the initial and subsequent visits, the subject will be asked asked to practice various control methods using a virtual reality system. EMG data and virtual "games" will be used to practice the control and will provide quantitative data that can be used to assess the various control methods mathematically, without the prosthesis.
Once they receive a socket, they will complete 1-3 days of training to learn how to control the prosthesis with either conventional or pattern recognition control. The prosthetic training days may occur concurrently with the fitting appointment or it may require a separate visit. The subject will return home for the initial 8 week home use trial. They will be asked to use the prosthesis for an average of 2 hours per day across the 8 week home trial period. They will keep a home log of prosthesis use and check in weekly with a therapist to discuss usage and prosthesis performance. They may also be provided with a laptop computer with a camera for Skyping. The laptop can be connected to the prosthesis, and the screen can be viewed remotely. The research team can then continue with remote follow up with more training and problem solving as needed. Directly following the 8 week home trial period, usage data from the prosthesis will be downloaded. The subject will complete 1-3 days of outcomes testing with a therapist. A series of tests will be performed and data recorded of your performance. The subject will then repeat the 1-3 days of training, 8 week home trial period, and 1-3 days of outcomes testing with either the other type of control (i.e. conventional or pattern recognition).
Phase 2: The subject will return to one of the three centers for Targeted Muscle Reinnervation (TMR) surgery. The surgery is an outpatient procedure that will be performed under general anesthesia, consistent with current standard of care. The surgery will involve the transfer of the median nerve to the flexor digitorum superficialis (DFS) muscle and the ulnar nerve will be transferred to the flexor carpi ulnaris (FCU) muscle. Both transfers can be done with a single incision. Alternative target muscles (e.g. the brachioradialis muscle) can be used if trauma interferes with use of the DFS and/or FCU. Some post-operative pain is expected and the subject will be given a prescription for pain medication if needed. Two weeks after the surgery the subject will be asked to start doing exercises to help with muscle recovery. They will return to using the prosthesis from Phase 1 with either conventional or pattern recognition control for 6 months after surgery. Socket adjustments will be made if needed. If they return to using pattern recognition control, their usage and performance data will be tracked during this 6 month period. The subject may be provided with a laptop computer and asked to perform a series of virtual tests. They will receive additional training on how to complete these tests. If the subject returns to using conventional control, they will not be asked to complete the additional tests, nor will the usage or performance data be tracked. Six months after surgery, when reinnervation of the target muscles has been completed, the subject will return to using the prosthesis with pattern recognition control. They will be asked to return to one of the three centers if socket adjustments or a replacement socket is needed. The subject will receive 1-3 days of pattern recognition control training, only this time special attention will be paid to utilizing EMG from target muscles for improved function. Preliminary testing will be done to ensure that they can adequately use the prosthesis. The subject will then take the prosthesis home for a third 8-week home-use trial. The subject will be asked to log daily use of the device, note any issues, and follow up weekly with a therapist. After this home-use trial, the same 1-3 days of comprehensive outcomes testing will be completed and usage data from their prostheses will be downloaded.
Finally, the subject will continue using the prostheses at home for an additional 3-4 months. No usage requirements will be given during this time. At the end of this 3-4 month period (approximately 12 months after surgery), they will have a final round of 1-3 days of testing with the complete toolbox and data from the prosthesis will be downloaded.
The days of prosthesis training and testing may take place at the Rehabilitation Institute of Chicago, Walter Reed National Military Medical Center, or the San Antonio Military Medical Center or near your home. Study coordinators will determine the best location.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Illinois
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Chicago, Illinois, United States, 60611
- Rehabilitation Institute of Chicago
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Maryland
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Bethesda, Maryland, United States, 20889
- Walter Reed National Military Medical Center
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Texas
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Fort Sam Houston, Texas, United States, 78234
- San Antonio Military Medical Center
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- A upper limb amputation at the transradial level
Exclusion Criteria:
- Significant new injury that would prevent use of a prosthesis: The ability to consistently wear a prosthesis and perform activities of daily living and specific performance tasks is necessary to evaluate the relative benefits of the interventions.
- Cognitive impairment sufficient to adversely affect understanding of or compliance with study requirements, ability to communicate experiences, or ability to give informed consent: The ability to understand and comply with requirements of the study is essential in order for the study to generate useable, reliable data. The ability to obtain relevant user feedback through questionnaires and informal discussion adds significant value to this study.
- Significant other co morbidity: Any other medical issues or injuries that would preclude completion of the study, use of the prostheses, or that would otherwise prevent acquisition of useable data by researchers
Study Plan
How is the study designed?
Design Details
- Primary Purpose: BASIC_SCIENCE
- Allocation: NA
- Interventional Model: SINGLE_GROUP
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: TMR surgery to evaluate pattern recognition control
Perform Targeted Muscle Reinnervation (TMR) surgery and evaluate transradial TMR pattern recognition control of multifunctional prostheses.
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Subjects practice control methods using a VR system.
EMG data and virtual games are used and provide data to assess control methods without prosthesis.
Subjects are fit with commercially available multifunctional hand system.
They receive 1-3 days of training for conventional or pattern recognition control.
They return home for an 8 week trial.
They use the prosthesis for 2 hours a day across the 8 week trial.
They keep a log of use and check with a therapist about usage and performance.
After the 8 week trial, data from the prosthesis is downloaded.
The subject will complete 1-3 days of outcomes testing.
They perform a series of tests and data is recorded.
The subject will repeat the 1-3 days of training, 8 week home trial, and 1-3 days of outcomes testing with either type of control.
Subject has Targeted Muscle Reinnervation surgery.
The surgery transfers median nerve to flexor digitorum superficialis muscle and ulnar nerve to flexor carpi ulnaris muscle.
Two weeks after surgery, exercises start for muscle recovery.
Then return to prosthesis from Phase 1 for 6 months.
If they have pattern recognition control, usage and performance will be tracked for 6 months.
If they return to conventional control, they will not complete tests, track usage, or performance.
Six months after surgery, they return to pattern recognition control.
Receive 1-3 days of training.
Take prosthesis home for 8 week trial.
Log use of device, note issues, and follow up with therapist.
After home trial, 1-3 days of outcomes testing are completed and usage data downloaded.
Continue using their prostheses for an additional 3-4 months.
At 12 months after surgery, a final round of 1-3 days of testing and data are downloaded.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Improve pattern recognition control of multifunction prostheses for transradial amputees.
Time Frame: 15 months from initial enrollment
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Improved control of prosthesis as seen through functional use improvements.
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15 months from initial enrollment
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Modified Box and Blocks
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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Timed task to assess prosthetic control.
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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Clothespin Relocation Test
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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Timed task to assess prosthetic control.
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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ACMC
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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Assessment of capacity for myoelectric prosthetic control
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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Jebsen Test of Hand Function
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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7 part timed diagnostic test to determine the level of hand function.
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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Southampton Hand Assessment Procedure (SHAP)
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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The test consists of the manipulation of a series of both lightweight and heavyweight abstract objects.
The procedure is designed to provide a score of functionality.
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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OPUS-UEFS
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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An instrument that evaluates the activity limitations, quality of life, and patient satisfaction with services and devices.
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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Activities Measure for Upper Limb Amputees (AM-ULA)
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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A clinician rated measure of an upper limb amputee's performance of daily functional activities using a prosthesis.
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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TAC TEST/ Motion Test
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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Virtual reality testing of classification accuracy, motion completion rate, motion completion time and path efficiency.
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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PSFS
Time Frame: At 2 and 4 months pre-op; At 6 and 10 months post-op
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Used to assess functional ability to complete specific activities
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At 2 and 4 months pre-op; At 6 and 10 months post-op
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Collaborators and Investigators
Study record dates
Study Major Dates
Study Start
Primary Completion (ACTUAL)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ESTIMATE)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- STU00101444
- R01HD081525-01 (NIH)
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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