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Heart surgery clotting boost? small study tests fluid removal trick

NCT ID NCT04031144

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 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

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.