Knee surgery pain relief: could a simple nerve block cut opioid use?
NCT ID NCT07589127
First seen Jun 25, 2026 · Last updated Aug 21, 2026 · Updated 2 times
Summary
This trial tests whether a genicular nerve block given before knee replacement surgery can reduce pain and the need for opioids. About 70 adults with knee osteoarthritis will receive either the nerve block or a placebo injection. Researchers will track pain levels, opioid use, and recovery for three months 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
- ropivacaine (local anesthetic)
- What this could lead to
- If it works, this could offer a simple way to reduce pain and opioid use after knee replacement surgery.
- What could go wrong
- This is a small, early-stage trial with only 70 participants, so results may not apply to everyone. The nerve block may not provide significant benefit over 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.
- 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 70 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2026
- Expected to finish
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Jun 2029
An estimate. End dates often move.
- Lead sponsor
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A government agency
The lead sponsor is a government body.
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 80 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: * Symptomatic knee OA grade II-IV according to the Kellgren-Lawrence classification system scheduled for primary total knee arthroplasty * American Society of Anesthesiologists (ASA) Physical Status grade I-III * Able to provide written informed consent * Able to undergo surgery under spinal anesthesia Exclusion Criteria: * Younger than 18 or older than 80 years * ASA physical status IV * Allergy to local anesthetics * Revision surgery * Chronic opioid use (\> 3 months) * Coagulopathy * Cognitive impairment * Inability to comply with study procedures * Patients scheduled for day care surgery.
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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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Nordmøre and Romsdal Hospital (SNR)
RECRUITINGHjelset, Møre og Romsdal, 6412, Norway
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