Clinical trial Recruiting at 1 site Observational Ages 18 and up

Understanding oxygen use and organ injury after heart surgery

Official title: Oxygen Consumption, Early Postoperative Hypoperfusion and Organ Injury After Cardio-pulmonary Bypass: a Prospective Observational Study

Run by Uppsala University Hospital · NCT06930443 · Data updated 2026-11-12

This study is trying to see how oxygen use after heart surgery affects organ health in adults to improve care after the operation.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment65 (estimated)
SponsorUppsala University Hospital
Academic / other
Locations1 site (Uppsala, Sweden)
StatusRecruiting
StartedMay 5, 2025
Main results expectedDecember 2025
Study endsFebruary 2026
Registry record updatedMay 11, 2025
Trial IDNCT06930443 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults over 18 years old scheduled for elective cardiac surgery requiring cardiopulmonary bypass.

Probably not a fit

Patients with severe anemia, high lactate levels before surgery, or those requiring intensive care 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 observational study aims to investigate the relationship between oxygen consumption, blood flow issues, and organ injury in patients undergoing cardiac surgery with cardiopulmonary bypass. It focuses on individuals over 18 years old and will measure oxygen consumption using indirect calorimetry in the early hours post-surgery. Researchers will also monitor lactate levels and assess signs of organ injury in the heart, kidneys, liver, brain, and gut. The study will include 65 participants and aims to provide insights into postoperative care.

Why it matters

Potential benefit: If successful, this study could improve postoperative care and outcomes for patients undergoing cardiac surgery.

How similar studies have gone: While similar studies have explored oxygen consumption and organ injury, this specific observational approach is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Elective cardiac surgery requiring cardiopulmonary bypass

Exclusion Criteria:

* Combined, redo or annuloplasty procedures
* Surgical procedures involving other vascular cannulation than standard direct, such as bicaval or femoral cannulation
* Preoperative hyperlactatemia (\>2mmol/L) or anaemia (Hb \<90 g/dL)
* Preoperative need for supplementary oxygen or ICU care
* Consent not obtainable.

Where it's running

  • Uppsala University Hospital
    Uppsala, Sweden, Sweden
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.