Clinical trial Recruiting at 10 sites Phase 4 Interventional Ages 18 and up

Comparing two medications to prevent kidney injury after major surgery

Official title: Norepinephrine vs Phenylephrine as the First-line Vasopressor to Prevent Postoperative Acute Kidney Injury After Major Non-cardiac Surgery

Run by University of California, San Francisco · NCT06802224 · Data updated 2026-11-12

This study is testing which medication, norepinephrine or phenylephrine, works better to prevent kidney injury in adults having major surgery.

More Noncardiac Surgery trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment18000 (estimated)
SponsorUniversity of California, San Francisco
Academic / other
Locations10 sites (San Francisco, California and 9 other locations)
StatusRecruiting
StartedApril 1, 2025
Main results expectedJuly 2028
Study endsJuly 2028
Registry record updatedMay 26, 2026
Trial IDNCT06802224 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older undergoing major non-cardiac surgery lasting two hours or more who require intravenous vasopressors.

Probably not a fit

Patients undergoing cardiac surgery, organ transplantation, or those with severe pre-existing kidney conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to determine which vasopressor medication, norepinephrine or phenylephrine, is more effective in preventing acute kidney injury following major non-cardiac surgery. It employs a pragmatic, cluster-randomized, crossover design across multiple hospitals, where centers will alternate between using each medication based on the month. Data will be collected from routine clinical care without additional lab tests, focusing on the impact of these medications on patient outcomes during surgery. The study will involve patients aged 18 and older who require intravenous vasopressors during surgery lasting two hours or more.

Why it matters

Potential benefit: If successful, this study could lead to improved kidney health and recovery outcomes for patients undergoing major surgery.

How similar studies have gone: Other studies have explored the use of vasopressors in surgical settings, but this specific comparison of norepinephrine and phenylephrine is novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 18 years or older
* Surgery under general anesthesia with a surgery duration of 2 hours or more
* Received intravenous vasopressors during surgery

Exclusion Criteria:

* Cardiac surgery
* Extra-corporeal membrane oxygenation
* Organ transplantation
* Obstetric procedures
* Procedures on the kidney
* Outpatient procedures
* Already receiving NE or PE or inotropes before induction of anesthesia (at the time of anesthesia start)
* American Society of Anesthesiologists physical status classification 5 or 6
* Patient for whom a local protocol recommends a specific first line vasopressor
* Most recent documented estimated glomerular filtration rate (eGFR) \< 15 mL/min/1.73m\^2 or preoperative renal replacement therapy within 60 days before surgery
* Patients who do not have a preoperative creatinine value within 60 days before surgery
* Alive patients who do not have a postoperative creatinine value

Where it's running

  • University of California, San Francisco
    San Francisco, California, United States
    Recruiting
  • University of Maryland
    College Park, Maryland, United States
    Recruiting
  • University of Michigan
    Ann Arbor, Michigan, United States
    Recruiting
  • Henry Ford Health
    Detroit, Michigan, United States
    Recruiting
  • Duke University Medical Center
    Durham, North Carolina, United States
    Recruiting
  • Wake Forest University School of Medicine
    Winston-Salem, North Carolina, United States
    Recruiting
Show 4 more locations
  • UT Southwestern Medical Center
    Dallas, Texas, United States
    Recruiting
  • University of Virginia
    Charlottesville, Virginia, United States
    Recruiting
  • University of Washington
    Seattle, Washington, United States
    Recruiting
  • University Health Network
    Toronto, Ontario, Canada
    Recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.