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Oxygen test may help predict outcomes for babies with rare heart defect

NCT ID NCT03771534

Knowledge-focused Sponsor: The Hospital for Sick Children 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 extra oxygen to pregnant women can help doctors tell how well blood mixes in the hearts of unborn babies with a condition called transposition of the great arteries (TGA). Researchers used ultrasound and MRI to measure blood flow and heart structure in 34 fetuses. The goal was to improve diagnosis and predict which babies might have more complications after birth.

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

34 people

The number who actually took part.

Started

Sep 2018

Finished

Dec 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

18 years and older

Sex

Female participants only

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: * Fetus with simple TGA +/- small VSD * Intention of active postnatal management after birth Exclusion Criteria: * Fetus with complex form of TGA * Significant fetal arrhythmia * Major non-cardiac lesions * Maternal contraindications for fetal MRI

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Conditions

The condition(s) this trial relates to.

transposition of the great arteries

As listed by the trial registrant

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

Tga - transposition of great arteries

Contacts and locations

Locations

  • The Hospital For Sick Children

    Toronto, M5G1X8, Canada