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Bionic leg aims to restore natural walking for amputees

NCT ID NCT03204513

Disease control Sponsor: Shirley Ryan AbilityLab 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 This study
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests a powered knee-ankle prosthetic leg in 15 people with above-knee amputations. The device uses motors to help with walking and climbing. Researchers will measure endurance, walking patterns, and quality of life to see if the bionic leg improves everyday mobility and social interaction.

What this could mean

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

Active substance
Vanderbilt Powered Knee-Ankle Prosthesis (a powered prosthetic leg with motorized knee and ankle joints)
What this could lead to
If successful, this device could help people with above-knee amputations walk more easily and confidently in daily life.
What could go wrong
This is a small, early-stage trial with only 15 participants, so results may not apply to everyone. The device is complex and may not be suitable 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.

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

About 15 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2016

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Ages

18 to 80 years

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: * Unilateral transfemoral level limb loss or limb difference * K2/K3/K4 level ambulators * Required to use a microprocessor knee on their prosthesis Exclusion Criteria: * Over 250 lbs body weight * Inactive, physically unfit * Cognitive deficits or visual impairment that would impair their ability to give informed consent or to follow simple instructions during the experiments * Pregnant women * Co-morbidity that interferes with the study (e.g. stroke, pace maker placement, severe ischemia cardiac disease, etc.)

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As listed by the trial registrant

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

Transfemoral amputees

Contacts and locations

Locations

  • Shirley Ryan AbilityLab

    Chicago, Illinois, 60611, United States

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