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New study aims to improve knee pain relief by testing better targeting methods

NCT ID NCT04472702

Symptom relief Sponsor: University of California, Davis 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests two ways to guide a treatment called cooled radiofrequency ablation for knee osteoarthritis pain. The treatment uses heat to calm nerves around the knee. Researchers want to see if using ultrasound is better than the standard X-ray method for targeting the right nerves. About 90 adults with knee pain that hasn't improved with other treatments will take part.

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 90 people

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

Started

Feb 2022

Expected to finish

May 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

35 to 99 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\) patients of either gender with primary knee OA of one or both knees fulfilling the diagnostic criteria for knee OA by the American College of Rheumatology, * 2\) Kellgren-Lawrence score of two to four, * 3\) reported NPRS pain intensity of at least four on most or all days of the past week * 4\) pain resistant to conventional treatments which may include but is not limited to medications (e.g. acetaminophen, oral or topical non-steroidal anti-inflammatory drugs, opioids), physical therapy, and intra-articular injections (e.g. corticosteroids, hyaluronic acid, platelet-rich-plasma) for at least 3 months. In the case of bilateral knee OA, the most symptomatic knee will be treated and studied. Exclusion Criteria: * 1\) age \<35 years, * 2\) non-English speaking patients, * 3\) body mass index greater than 40, * 4\) previous radiofrequency ablation procedure for the knee, * 5\) active systemic or local infections at the site of needle/cRFA probe placement, * 6\) previous knee joint replacement surgery, * 7\) autoimmune or inflammatory cause of knee arthritis such as rheumatoid or psoriatic arthritis, * 8\) non-ambulatory patients, * 9\) patients who are unable to provide their own consent (e.g. dementia), * 10\) unstable medical or psychiatric illness, * 11\) patients with pacemakers, spinal cord stimulators, deep brain stimulators, or similar devices, * 12\) patients seeking care as a part of workman's compensation or have litigation pending * 13\) a negative response to diagnostic geniculate nerve lidocaine injections.

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Conditions

The condition(s) this trial relates to.

osteoarthritis, knee

As listed by the trial registrant

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

Knee osteoarthritis

How to take part

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

  1. The places running it

    2 sites. 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

  • UC Davis Health

    NOT_YET_RECRUITING

    Sacramento, California, 95816, United States

  • University of Rochester

    RECRUITING

    Rochester, New York, 14627, United States

More trials for these conditions

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