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Brain waves vs. stress hormones: what surgery reveals

NCT ID NCT06228729

Knowledge-focused Sponsor: Seoul National University Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 how brain activity (measured by EEG) and stress hormones change when patients are intubated and when surgery begins. 52 adults having open abdominal surgery took part. The goal was simply to observe and understand these changes, not to test a treatment.

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.

Participants

52 people

The number who actually took part.

Started

Apr 2025

Finished

Nov 2025

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.

Who is studied

Adult patients undergoing open abdominal surgery and endotracheal intubation under general anesthesia

Ages

20 to 80 years

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: * 1\) Patients scheduled to undergo open abdominal surgery under general anesthesia with endotracheal intubation. * 2\) Patients requiring invasive blood pressure monitoring during surgery Exclusion Criteria: * 1\) Patients transferred to the intensive care unit after surgery * 2\) Surgery duration of less than one hour * 3\) Patients with neurological underlying conditions * 4\) Patients on chronic use of psychotropic medications and opioid drugs * 5\) Emergency surgery

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Conditions

The condition(s) this trial relates to.

Surgical Wound

As listed by the trial registrant

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

Abdominal surgery Electroencephalogram Endotracheal intubation Surgical incision

Contacts and locations

Locations

  • Seoul National University Hospital

    Seoul, 03080, South Korea

More trials for these conditions

Other studies related to the condition(s) this trial covers.