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Brain oxygen watch during heart surgery may shield memory

NCT ID NCT04766554

Knowledge-focused Sponsor: Instituto Nacional de Cardiologia de Laranjeiras Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 continuously measuring oxygen levels in the brain during heart bypass surgery can reduce memory and thinking problems after the operation. 326 older adults (age 60+) having planned heart surgery took part. Researchers compared standard care to care guided by a brain oxygen monitor to see if it improved cognitive recovery.

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

326 people

The number who actually took part.

Started

May 2021

Finished

Aug 2024

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

60 years and older

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 60 or older * Elective coronary artery bypass graft surgery using cardiopulmonary bypass * Preoperative cognitive assessment by means of Mini-Mental State Examination (MMSE) test, greater than or equal to 24 * Signed informed consent Exclusion Criteria: * Patients with focal neurologic deficit * Carotid artery stenosis greater than 70% * Patients with pre-existing cognitive dysfunction * Patients with psychotic disorders * History of allergy to adhesive part of the electrode * History of craniofacial surgery

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Conditions

The condition(s) this trial relates to.

cognitive disorder Cognitive Dysfunction coronary artery disorder heart disorder

As listed by the trial registrant

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

Cardiac disease Cognitive dysfunction

Contacts and locations

Locations

  • Hospital São José

    Criciúma, Santa Catarina, Brazil

  • Instituto Nacional de Cardiologia

    Rio de Janeiro, Rio de Janeiro, Brazil

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