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Scientists hunt for blood doping clues in tiny transfusions

NCT ID NCT03889834

Knowledge-focused Sponsor: Assistance Publique - Hôpitaux de Paris 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether giving healthy volunteers a small amount of their own stored blood (200 ml) causes detectable changes in blood cells and particles. Researchers analyzed blood samples before and after transfusion to find markers that could reveal this type of doping in athletes. The study involved 28 healthy men aged 18-35 and did not aim to treat any disease.

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

28 people

The number who actually took part.

Started

Jan 2024

Finished

Apr 2026

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 35 years

Sex

Male participants only

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: * Male between 18 and 35 years old * Without health problem nor disease requiring regular medical treatment * Free from any intercurrent acute pathology over 7 days * Healthy volunteers who have regularly sport activity, able to have blood sample and is out-of-competition during the research * Subject who did not practice a competition (or exhaustive training ) 3 days before the blood sample and the autotransfusion * Affiliated to a social security regimen Exclusion Criteria: * Subject with contraindication for drawing blood * Subject with medical pathology contraindicating sport practice * Subject under treatments or drugs in the list of products prohibited for sports practice and competitions, in particular erythropoeitins and erythropoiesis-stimulating agents (updated list of World Anti-Doping Agency https://www.wada-ama.org/fr/liste-des-restrictions). * Subject with physical or mental disability or restriction of liberty that would prevent autotransfusion * Subject without a social security regimen * Subject under guardianship or curatorship * Subject participating in any Interventional study * Positive HIV and/or hepatitis serology * Discovery of a hematological disease

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As listed by the trial registrant

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

The focus is on the detection of the consequences of autologous blood transfusion in healthy volunteers

Contacts and locations

Locations

  • EFS de Versailles, centre de soins

    Chesnay, Île-de-France Region, 78150, France