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Shock to the system: electrical zaps may help stroke patients stay on their feet

NCT ID NCT04957355

Symptom relief Sponsor: University of Illinois at Chicago Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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 Results may not be published yet.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
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This status has not been confirmed recently, so it may be out of date.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 is testing whether a device that sends small electrical pulses to leg muscles can help people with chronic stroke improve their balance and walking. Twenty participants will be exposed to slip- and trip-like disturbances on a treadmill, with and without the stimulation. The goal is to see if the stimulation can reduce falls and improve gait in different environments.

What this could mean

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

Active substance
neuromuscular electrical stimulation (NMES) device
What this could lead to
If it works, this could point toward a new way to help stroke survivors improve their balance and reduce falls.
What could go wrong
This is a very small, early study with only 20 people. It is testing immediate effects, not long-term benefits, and may not lead to a practical treatment.

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 20 people

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

Started

May 2021

Expected to finish

Nov 2027

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 90 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: Age group: 18-90 years. 1. Presence of hemiparesis. 2. Onset of stroke (\> 6 months). 3. Ability to walk independently with or without an assistive device for at least 300 ft. 4. Can understand and communicate in English. 5. Cognitively and behaviorally capable of complying with the regimen (Montreal Cognitive Assessment \> 25/30). Exclusion Criteria: Subjects will not proceed with the test if any of the following occurs at baseline measurement: 1) HR \> 85% of age-predicted maximal heart rate (HRmax) (HRmax = 220 - age), 2) systolic blood pressure (SBP) \> 165 mmHg and/or diastolic blood pressure (DBP) \> 110 mmHg during rest, or 3) oxygen saturation (measured by pulse oximeter) \< 95% during rest. 1. Body weight more than 250 lbs. 2. Any neurological condition other than stroke. 3. Any cardiopulmonary, musculoskeletal, or systemic diagnosis. 4. Recent major surgery (\< 6 months) or hospitalization (\< 3 months). 5. Deep venous thrombosis. 6. Antecedent of cancer. 7. Peripheral nerve injury or neuropathy in the affected limb with motor disability. 8. Spasticity (Ashworth scale \> 2). 9. Uncontrolled high blood pressure/angina. 10. Skin condition not tolerant with FES therapy. 11. Uncontrolled seizure disorder. 12. Botox treatment within the last 5 months. 13. History of epilepsy. 14. Pacemaker users. Excluded or Vulnerable Populations Non-English speaking populations will be excluded as the consent procedures and instructions will be in English.

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Conditions

The condition(s) this trial relates to.

stroke disorder

As listed by the trial registrant

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

Chronic stroke

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University of Illinois at Chicago

    RECRUITING

    Chicago, Illinois, 60612, United States

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