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New powered knee shows promise for amputees with low mobility

NCT ID NCT04799145

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

What the study statuses mean

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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 This study
The trial has finished. Results may not be published yet.
Stopped early
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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested a motorized, computer-controlled knee (Mobili Knee) in 6 people who had a leg amputation above the knee and used a prosthetic. Participants performed walking and balance tests with their usual knee and with the powered knee. The goal was to see if the powered knee improved mobility and balance during everyday activities.

What this could mean

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

Active substance
Motorized microprocessor-controlled prosthetic knee
What this could lead to
If it works, this could point toward a better prosthetic option for people with leg amputations who have limited mobility.
What could go wrong
This was a very small study with only 6 participants, so results may not apply to everyone. The device may not improve performance for all users.

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.

Participants

6 people

The number who actually took part.

Started

Feb 2021

Finished

Feb 2021

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: * 50Kg\< body weight \< 116Kg * Cognitive ability to understand all instructions and questionnaires in the study; * K1-K2 unilateral transfemoral amputees * Allows for 37mm knee center height to dome of pyramid alignment * Age ≥ 18 years * Willing and able to participate in the study and follow the protocol * Comfortable and stable socket fit (5 or over on the SFCS) Exclusion Criteria: * Users with cognitive impairment * Users aged \<18y * Bilateral amputees * Users with stump pain affecting their functional mobility * Users with socket problems * Users with co-morbidities in the contra-lateral limb, which significantly affect their functional mobility

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As listed by the trial registrant

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

Amputation Prosthesis user

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