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Smart prosthetic foot mimics natural ankle twist for smoother walking

NCT ID NCT03532100

Knowledge-focused Sponsor: VA Office of Research and Development 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested a special prosthetic foot that can twist in a way similar to a natural ankle. Fourteen people with below-knee amputations walked in straight lines and circles while the foot's twisting was adjusted. Researchers measured how much force was put on the leg and asked participants which setting felt best. The goal was to find the ideal amount of twist to make walking more comfortable.

What this could mean

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

Active substance
Torsionally adaptive prosthetic foot
What this could lead to
If successful, this could lead to more comfortable and natural-feeling prosthetic feet that reduce twisting forces on the leg.
What could go wrong
This was a small, early-stage study with only 14 participants, so results may not apply to everyone. The device is still experimental and not yet available for prescription.

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

14 people

The number who actually took part.

Started

Apr 2018

Finished

Nov 2024

Lead sponsor

A government agency

The lead sponsor is a US federal agency other than the NIH.

Who can take part

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

Ages

18 to 70 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 transtibial amputation * Been fit with a prosthesis and used it for at least six months * Wear the prosthesis for four or more hours on an average day * Prescribed prosthesis can accommodate fitment of the study prosthetic components to be tested (determined at initial visit) Exclusion Criteria: * Improper fit and suspension with current prosthesis and one cannot be achieved with clinical resources (determined at initial visit) * Current skin irritation or injury on residual limb * Osteoarthritis, injury, or pain that interferes with walking ability * Currently incarcerated * Pregnant (determined via self-report) * Inadequate cognitive function or language proficiency to consent to participate

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As listed by the trial registrant

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

Lower extremity amputation

Contacts and locations

Locations

  • VA Puget Sound Health Care System Seattle Division, Seattle, WA

    Seattle, Washington, 98108-1532, United States

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