Zapping nerves before knee surgery may cut pain — trial puts it to the test
NCT ID NCT07727551
First seen Jul 27, 2026 · Last updated Jul 28, 2026 · Updated 1 time
Summary
This trial tests whether a nerve-blocking procedure called genicular nerve radiofrequency ablation, done two to six weeks before total knee replacement, can reduce postoperative pain and improve function. The study includes adults aged 18 to 60 who are scheduled for knee replacement and have certain risk factors like obesity, diabetes, or chronic pain. Participants are randomly assigned to receive the nerve block or not, and their pain and mobility are tracked after surgery.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- radiofrequency ablation of the genicular nerve
- What this could lead to
- If it works, this could offer a way to reduce pain and speed up recovery after knee replacement surgery.
- What could go wrong
- This is a small early-stage trial, so results may not apply to everyone. The procedure carries risks like nerve damage or infection.
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
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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
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About 44 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jun 2026
- Expected to finish
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Jun 2027
An estimate. End dates often move.
- Lead sponsor
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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
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18 to 60 years
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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 between 18 and 60 * Elective total knee arthroplasty * 2 to 6 weeks before the procedure AND either of: * BMI \> 35 * Diabetes under insulin * Anxiety disorder * Treated depressive disorder * Widespread pain disorder or central sensitisation disorder * Chronic pain at a different site * Catastrophising * Sleep disorder * preoperative EVA 7 or more * OKS 25 or less * WOMAC 50 or more * Previous total knee arthroplasty (contralateral) * Knee CRPS Exclusion Criteria: * Previous prosthetic surgery on the same knee (i.e. redo surgery, open reduction internal fixation, knee hemiarthroplasty) * Major psychiatric disorder (i.e. major depression, schizophrenia) * Patient refusal * Inability to communicate with the patient and obtain informed consent
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Iris South Hospitals
RECRUITINGBrussels, 1050, Belgium
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