Magnetic Bead Tracking System and eOPRA Implant System With Bionic Prosthesis for Transtibial Amputees (NCT06391697)
A Feasibility Study Evaluating the Magnetic Bead Tracking System and Its Safety and Efficacy When Used With the e-OPRA Implant System and a Bionic External Prosthesis to Improve Prosthetic Controllability for Persons With Transtibial Amputation
🩺 Plain-English Summary (8th-Grade Level)
The e-OPRA Implant System, is a further development of the OPRA (Osseointegrated Prostheses for the Rehabilitation of Amputees) Implant System. The e-OPRA Implant system is an implant system for direct skeletal anchorage of amputation prostheses. The added feature in the e-OPRA Implant system, is a bidirectional interface into the human body that allows permanent and reliable communication using implanted electrodes. These electrodes will provide long-term stable bioelectric signals for an improved control of the prosthetic limb. The Magnetic Bead Tracking System, which will be implanted and used in combination with the e-OPRA Implant system, is an investigational device that consists of pairs of magnetic beads, and a set of magnetic field sensors that measure and track the length of muscles and the speed at which they move in real-time. When the beads are implanted in muscle in the residual limb of an amputee, the muscle length signal is communicated to an investigational, robotic ankle-foot prosthesis. The purpose of the study is to evaluate the feasibility of a transtibial amputee with the e-OPRA Implant System and Magnetic Bead Tracking System exhibiting full neural control over a neuro-mechanical prosthetic system. A maximum of seven subjects will be enrolled. Each subject will undergo one or more surgeries where the e-OPRA Implant System and Magnetic Bead Tracking System will be implanted. The subjects will participate in follow-up sessions the last of which occurs approximately 24 months after the surgery. This is a prospective, non-randomized, uncontrolled study.
Who can join: Review the eligibility criteria below.
Location: Brigham and Women's Hospital — Boston, Massachusetts
Age range: 22 Years to 65 Years
🧪 Interventions in This Study
📋 "Do I Qualify?" — 1-Minute Self Screener
Instant ChecklistFull eligibility criteria are available on the official NIH protocol. View the criteria ↗
📍 All Participating Trial Locations (2 Sites)
- Brigham and Women's Hospital — Boston, Massachusetts
- MIT Media Lab — Cambridge, Massachusetts
💰 Cost, Insurance & Patient Rights
- 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
- Routine Patient Care: Under federal law (ACA § 2709) and many state statutes, routine care costs are covered during participation.
- Voluntary Participation: You may withdraw at any time without affecting your standard medical care.
More studies in Amputation
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- Transfemoral Osseointegrated Prosthesis Limb-Load Symmetry Training — Aurora, Colorado
- Personalized Mobility Interventions Using Smart Sensor Resources for Lower-Limb Prosthesis Users — Chicago, Illinois
- Optimizing Prosthetic Prescription to Mitigate the Effects of Perspiration — Seattle, Washington
Explore by condition: All Amputation clinical trials
💡 How to Participate
- Check the checklist above to see if you may qualify.
- Review the official NIH record below to find the coordinating site.
- Ask about the visit schedule, what is covered at no cost, and any travel support.
- Confirm with your own doctor before making a decision.