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Zapping the brain to quiet knee pain: new study tests two non-invasive techniques

NCT ID NCT02723929

Symptom relief Sponsor: Spaulding Rehabilitation Hospital 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 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested whether two types of gentle brain stimulation (tDCS and TUS) can reduce pain and improve daily function in people with chronic knee osteoarthritis. 64 adults with persistent knee pain received either real or sham stimulation. Researchers measured changes in pain levels and painkiller use to see if the active treatment worked better than placebo.

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

64 people

The number who actually took part.

Started

Sep 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 85 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: 1. Able to provide informed consent to participate in the study. 2. Subjects between 18-85 years old. 3. Diagnosis of chronic osteoarthritis with pain of either knee as self-reported. 4. Existing knee pain of at least 3 on a 0-10 VAS scale on average over the past 6 months. 5. Pain of at least 3 on a 0-10 VAS scale on average over the week prior to the first stimulation session. 6. Pain resistant to common analgesics and medications for chronic pain used as initial pain management such as Tylenol, Aspirin, Ibuprofen, Soma, Parafon Forte DCS, Zanaflex, and Codeine. 7. Having the ability to feel pain as self-reported. Exclusion Criteria: 1. Pregnancy or trying to become pregnant in the next 6 months. 2. History of alcohol or drug abuse within the past 6 months as self-reported 3. Contraindications to transcranial brain stimulation or TUS, i.e. implanted brain medical devices or implanted brain metallic devices. 4. Unstable medical conditions (e.g. uncontrolled diabetes, uncompensated cardiac issues, heart failure or chronic obstructive pulmonary disease). 5. Epilepsy. 6. Use of carbamazepine within the past 6 months as self-reported. 7. Suffering from severe depression (with a score of \>30 in the Beck Depression Inventory) 8. History of unexplained fainting spells as self-reported. 9. Head injury resulting in more than a momentary loss of consciousness 10. History of neurosurgery as self-reported.

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Conditions

The condition(s) this trial relates to.

Chronic Pain chronic pain syndrome osteoarthritis osteoarthritis, knee

As listed by the trial registrant

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

Chronic pain Osteoarthritis

Contacts and locations

Locations

  • Spaulding Rehabilitation Network Research Institute

    Charlestown, Massachusetts, 02129, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.