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RecruitingNCT04936789Updated Oct 8, 2024

Clinical Feasibility of the IMES Transradial Prosthesis

An interventional study of IMES in Amputation, sponsored by Össur Iceland ehf. Recruiting at 1 site in United Kingdom. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2024-10-08.

Sponsored by Össur Iceland ehf · Not applicable, Interventional, and Device feasibility

From the registry’s dates

  • Primary completion was expected by Jan 2026, 9 months ago, but the record still lists the study as recruiting.
  • Started Jan 2023; still recruiting 3 years 9 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
3
Allocation
Not applicable
Ages
18 Years to 65 Years
Sex
All
01

Study summary

This study will evaluate the feasibility of using implanted myoelectric sensors (IMES) to control a transradial prosthesis

Read the detailed description

The study assesses the feasibility of an implantable myoelectric prosthesis control system to control a transradial prosthesis. Implantable Myoelectric Sensors (IMES) will be implanted into the residual forearm muscles of three transradial amputee subjects. These devices wirelessly transmit electrical muscle signals to an electromechanical prosthetic wrist and hand.

Following a two-week recovery from implantation of up to 16 IMES into residual forearm muscles, subjects will begin a two week training phase. When they receive their custom-fit IMES Transradial Prosthesis (including electromechanical wrist and hand) subjects initiate approximately four months of home use. Subjects will be offered up to five post-study follow-up visits. The usability and functionality of the prosthetic system will be evaluated throughout the study.

02

Conditions studied

  • Amputation
03

In context

Lead sponsor

Össur Iceland ehf is the lead sponsor of 23 studies on the registry; 4 are open to participants now.

Of its 10 completed or terminated interventional studies of FDA-regulated products, 7 (70%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • (unilateral acquired transradial) amputation
  • residual limb size requirements to fit investigational device componentry
  • at least 6 residual muscle locations available for implantation
  • good compliance with health service (rehabilitation)
  • willing to undergo surgical implantation of IMES Sensor implants
  • experience with myoelectric upper limb prostheses
  • using own myoelectric device approximately 6-8h/day
  • able to provide informed consent and attend the study visits

Exclusion criteria

Exclusion Criteria:

  • any condition which in the opinion of the investigator poses a risk to health
  • neurological disorder that may prohibit accurate control
  • major injury proximal to the level of amputation
  • neuromuscular disorder
  • nerve transection or palsy that may cause de-innervation of muscles planned for implantation
  • allergy to implanted materials
  • existing active implant
05

Study design

Phase
Not applicable
Primary purpose
Device feasibility
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
3 participants (estimated)

Study arms

  • Experimental
    Single arm

    Single arm. All subjects will receive the intervention. Comparator device will be subjects' own prosthesis at baseline.

    Device: IMES

Interventions

  • DeviceIMES

    Surgical implantation of IMES

06

What researchers measure

Primary outcomes

  1. Grip Accuracy

    Self-drafted assessment of accuracy in prosthesis movements. The purpose of this measure is to quantify subjects' ability to use the investigational device to control specific prosthetic movements. When performing the Accuracy Test, the subject attempts to execute a series of specified wrist and hand movements using the investigational device. An objective rater scores each movement on a 0-3 scale with 0 = no movement observed and and 3 = movement observed (with no unintended movements). A score is given for each movement and a combined score is derived from the complete set of movements. Administered as a repeated measure, the Grip Accuracy test assesses Change over time (training effect).

    Time frame: The measure will be carried out 11 times during the study, at Baseline with the subject's own device for comparison, and at 10 study visits with the investigational device conducted over approximately 6 months.

07

Study locations

1 of 1 sites recruiting
  • NHS Greater Glasgow and Clyde
    Glasgow, 0000 000, United Kingdom
    • Aidan Roche · Contact
    Recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 8, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04936789
Lead sponsor
Össur Iceland ehf
Responsible party
Sponsor
First posted
Jun 23, 2021
Start date
Jan 1, 2023
Primary completion
Jan 2026 (estimated)
Completion
Jan 2026 (estimated)
Last update
Oct 8, 2024

Study contacts

Daire McGuinness, BSc
Contact
dmcguinness@ossur.com
00441315070097
Aidan Roche, MD
principal investigator · NHS; University of Edinburgh

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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