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New pump could make artificial limbs more comfortable

NCT ID NCT04230512

Symptom relief 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested a new hybrid pump that creates a vacuum to hold prosthetic limbs in place. Twelve people with leg amputations walked in a lab to see if the pump improved comfort and mobility. The goal was to verify the pump works during walking.

What this could mean

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

Active substance
Pump prototype
What this could lead to
If successful, this pump could make prosthetic limbs more comfortable and easier to use for people with amputations.
What could go wrong
This was a small, early lab study with only 12 participants, so results may not apply to everyone. The pump may not work as well in daily life.

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

12 people

The number who actually took part.

Started

Apr 2020

Finished

Mar 2026

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 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: * Ability to stand quietly and walk for 10 minutes continuously without an assistive device (e.g. cane or walker) and without undue fatigue or health risks * Pre-classified clinically to be at least a limited community ambulator of Medicare Functional Classification Level (K)2 * Residual limb in good health * At least six months experience with a definitive prosthesis that utilizes vacuum assisted suspension Exclusion Criteria: * Pathologies aside from amputation or taking medicine that would influence walking or balance * Poor prosthetic fit or poor residual limb sensation

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As listed by the trial registrant

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

Amputation

Contacts and locations

Locations

  • Jesse Brown VA Medical Center, Chicago, IL

    Chicago, Illinois, 60612, United States

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