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Brain waves may reveal pain before you wake up

NCT ID NCT06313320

Knowledge-focused Sponsor: University of Chile 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 57 adults having laparoscopic abdominal surgery to see if specific brain wave patterns during surgery are linked to how much pain they feel afterward. Researchers measured pain levels and painkiller use after surgery. The goal was to better understand pain, not to test a new 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

57 people

The number who actually took part.

Started

May 2024

Finished

Mar 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.

Who is studied

Adult patients schedule for elective abdominal surgery under general anesthesia.

Ages

18 to 60 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: * American Society of Anesthesiologist Performance Status I or II * Scheduled for elective laparoscopic abdominal surgery under General Anesthesia Exclusion Criteria: * Body Mass Index \> 35 kg/m2 * Past history or suspected difficult airway * Craniofacial malformations * Use of regional anesthesia technique during or after the surgery * Severe arrhythmia or use of a pacemaker device * Severe neuropsychiatric illness (Mayor depression, bipolar disorder, schizophrenia) * Regular use of psychoactive drugs * Any injury in the right hand * Past history of peripheral neuropathy * Diabetes Mellitus * Known lesion in the spinothalamic tract. * Analgesics used in the past 72 hours * Known allergy to propofol * Previous diagnosis of a condition associated with chronic pain (such as fibromyalgia, rheumatoid arthritis, osteoarthritis, migraine)

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Conditions

The condition(s) this trial relates to.

Nociceptive Pain Pain Pain, Postoperative

As listed by the trial registrant

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

Nociceptive pain Pain, postoperative

Contacts and locations

Locations

  • Centro de Investigacion Clinica Avanzada

    Santiago, Chile

  • Hospital Clinico de la Universidad de Chile

    Santiago, RM, 7563215, Chile

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