Heart surgery clotting boost? small study tests fluid removal trick
NCT ID NCT04031144
First seen Jun 25, 2026 · Last updated Jun 26, 2026 · Updated 1 time
Summary
This completed study looked at whether removing extra water from the blood just before taking patients off the heart-lung machine could improve blood clotting. It included 39 adults having heart valve surgery. The researchers measured changes in clot strength using a special blood test. The goal was to see if this simple step might reduce bleeding risks.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- ultrafiltration (procedure)
- What this could lead to
- If this technique improves clotting, it could help reduce bleeding and transfusion needs during heart surgery.
- What could go wrong
- This is a small, completed study with only 39 patients, so results may not apply to everyone. The effect on real-world outcomes like bleeding or transfusions was not directly measured.
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
-
39 people
The number who actually took part.
- Started
-
Jan 2020
- Finished
-
Oct 2023
- 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
-
19 months to 75 years
- Sex
-
Anyone
- Healthy volunteers
-
Accepted
You do not need to have the condition being studied to take part.
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: * patients undergoing elective cardiac surgery with cardiopulmonary bypass (CPB) * maximal clot formation (MCF) in ROTEM-EXTEM is reduced (\< 50.5 mm before applying ultrafiltration) Exclusion Criteria: * transfusion of packed RBC\> 3 units during CPB * total ultrafiltration volume \< 250 ml * hyperfibrinolysis (lysis% \> 10%) before applying ultrafiltration
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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.
Contacts and locations
Locations
-
Konkuk University Medical Center
Seoul, Seoul, 05030, South Korea
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Heart surgery recovery: can patients manage their own precautions?