Nerve block may cut opioid use after heart bypass
NCT ID NCT07732465
First seen Jul 29, 2026 · Last updated Jul 30, 2026 · Updated 1 time
Summary
This trial tests whether a targeted nerve block, called an adductor canal block, can reduce leg pain after coronary artery bypass grafting (CABG) when a leg vein is used as a graft. About 120 adults scheduled for CABG will receive either the block with a numbing medication or a sham injection. Researchers will measure leg pain at rest over the first 24 hours and track total opioid use for 48 hours 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
- a nerve block injection with bupivacaine and dexmedetomidine
- What this could lead to
- If effective, this nerve block could offer a simple way to ease leg pain after heart bypass surgery and reduce reliance on opioid painkillers.
- What could go wrong
- This is a mid-stage trial with 120 participants, so results may not apply to all patients. The block carries small risks like infection or allergic reaction.
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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Phase 2/3
Runs two stages together: whether the treatment works, then large-scale confirmation.
- Participants
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About 120 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Aug 2026
An estimate. Start dates often move.
- Expected to finish
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Dec 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 110 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: * Planned CABG with unilateral or bilateral great saphenous vein (GSV) harvesting, without concomitant valve surgery * Age ≥ 18 years * Ability to understand the protocol and provide written informed consent * ASA physical status I-IV Exclusion Criteria: * Refusal to participate in the study or inability to provide written informed consent * Contraindication to adductor canal block (e.g., local infection, allergy to local anesthetics) * Pre-existing chronic pain associated with chronic use of analgesic medications other than acetaminophen * Pre-existing peripheral neuropathy affecting the leg * Participation in two other interventional studies at the Montreal Heart Institute * Endoscopic vein harvesting performed by the surgical team instead of open saphenectomy technique
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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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Montreal Heart Institute
Montreal, Quebec, H1T 1C8, Canada
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Can AI read heart scans to predict the next heart attack?
- Can a new drug cool the hidden inflammation that fuels heart disease?
- New CT scanner aims to cut unnecessary heart procedures
- Heart bypass surgeons test which vein layout keeps grafts open
- A soft patch that watches your heart beat in real time