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Bionic knee gets a software Tune-Up: will it help amputees walk better?

NCT ID NCT06620861

Symptom relief Sponsor: Össur Iceland ehf Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early This study
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested a new firmware (software) update for the Power Knee, a bionic knee used by people who have lost a leg above the knee. Six participants tried both the new and current firmware while doing daily tasks like standing up, walking, and climbing stairs. The goal was to see if the update made these activities easier. The study was terminated early, so results are limited.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Power Knee firmware update (device software)
What this could lead to
If successful, this firmware update could improve how well the Power Knee helps with everyday movements like standing up, walking, and climbing stairs.
What could go wrong
This was a very small, early study (only 6 participants) that was terminated early, so results are limited and may not apply to all users. The update may not offer noticeable benefits.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

6 people

The number who actually took part.

Started

Dec 2024

Finished

Dec 2024

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 50 kg \< body weight \< 116 kg * lower limb loss, amputation or deficiency * cognitive ability to understand all instructions and questionnaires in the study * Unilateral transfemoral amputees that are regular Power Knee users for at least 4 weeks * age ≥ 18 years * Moderate to high active subjects * Willing and able to participate in the study and follow the protocol * Comfortable and stable socket fit * No socket issues/changes in the last 6 weeks Exclusion Criteria: * Users with pain * Bilateral amputees * Users using passive microprocessor controlled knees * Users with cognitive impairment * Users with co-morbidities in the contra lateral limb, which affect their functional mobility * Hip disarticulation amputees * Users with osseointegrated prosthesis * Pregnant users

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Amputation Transfemoral amputation

Contacts and locations

Locations

  • Oakland Orthopedic Appliances Inc

    Bay City, Michigan, 48708, United States

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