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New oxygen test could cut unnecessary blood transfusions after heart surgery

NCT ID NCT02761564

Disease control Sponsor: University Hospital, Montpellier Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether measuring oxygen levels in the blood (ScvO2) can help doctors decide when to give blood transfusions to anemic patients after heart surgery. 100 patients were randomly assigned to receive transfusions based on standard guidelines or only if their ScvO2 was low. The goal was to see if this approach reduces the number of transfusions without harming patients.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Red blood cell transfusion guided by ScvO2 measurement
What this could lead to
If successful, this approach could help doctors decide when to give blood transfusions after heart surgery, potentially reducing the number of transfusions and their risks.
What could go wrong
This is a small, early study with only 100 patients, so results may not apply to everyone. The ScvO2-guided strategy might not reduce transfusions or could miss patients who need blood.

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

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

100 people

The number who actually took part.

Started

Oct 2016

Finished

Oct 2018

Lead sponsor

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

18 to 100 years

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age over 18 years * Patients admitted to intensive care after heart surgery * Anemic patient (Hb \< 9 g/dL) * Patient with a central venous catheter in the territory SVC Exclusion Criteria: * Patient with acute bleeding defined as a postoperative bleeding over 1000 ml in 12 hours or the need for a recovery operation for hemostasis or the transfusion of blood units over 4 * Patient with severe sepsis or septic shock criteria defined by the Surviving Sepsis compaign

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Conditions

The condition(s) this trial relates to.

anemia follicular lymphoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Anemia (<9G/DL) requiring blood transfusion Bleeding graded as insignificant, mild, moderate of universal definition of perioperative bleeding Central venous catheter on the superior vena cava (to perform SCVO2 measure) Hemodynamic and respiratory stability Undergoing nonemergent cardiac surgery

Contacts and locations

Locations

  • UHMontpellier

    Montpellier, Montpellier, France