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Eye-Opening study: watching pupils and eyelids to prevent awareness during surgery

NCT ID NCT07199049

Knowledge-focused Sponsor: Başakşehir Çam & Sakura City Hospital Source: ClinicalTrials.gov ↗

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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 Results may not be published yet.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
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First seen Jun 27, 2026 · Last updated Jul 23, 2026 · Updated 2 times

Summary

This study watches eye reflexes, eye movements, and pupil size in 60 adults having planned abdominal surgery under general anesthesia. The goal is to see if these simple eye signs can help doctors know how deep the anesthesia is and spot when a patient might be waking up during surgery. Researchers will compare these signs with standard brain monitoring to find a non-invasive way to prevent intraoperative awareness.

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

125 people

The number who actually took part.

Started

Dec 2025

Finished

Jul 2026

Lead sponsor

A government agency

The lead sponsor is a government body.

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 aged 18-65 years, ASA physical status I-III, undergoing elective abdominal surgery under general anesthesia at Başakşehir Çam and Sakura City Hospital will be included. Eligible patients must have the eye area uncovered and in a position suitable for observation, with surgery expected to last 1-3 hours. Both male and female patients will be enrolled. Head, neck, and eye surgeries or cases requiring full draping of the eye area will be excluded.

Ages

18 to 65 years

Sex

Anyone

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: * The study will include patients aged 18-65 who will undergo elective abdominal surgery (e.g., cholecystectomy/gastrectomy/colorectal surgery/prostatectomy/hysterectomy, etc.) under general anesthesia, with a planned duration of 1-3 hours. * Patients whose eye area is left uncovered and who are in a position suitable for observation * Patients who have signed the informed consent form * Patients with an ASA score of I-III Exclusion Criteria: * Patients undergoing surgical procedures in the head, neck, or face region (e.g., ENT, eye, jaw surgery, neurosurgery, thyroid/parathyroid) * Patients whose eye area must be completely covered with a sterile drape * Patients with an ASA score of IV or higher * Individuals with neurological disorders and impaired pupil response, patients who have previously undergone eye trauma or surgery and cannot undergo pupil evaluation * Patients who are unable to communicate and cannot provide informed consent * Emergency surgeries (e.g., appendectomy/ileus/gastrointestinal perforation/cesarean section/gunshot wounds/stab wounds/multiple trauma/traffic accidents, etc.) * Individuals who have previously been included in this study (to prevent repeated inclusion)

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Conditions

The condition(s) this trial relates to.

Intraoperative Awareness

As listed by the trial registrant

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

Eye movements General anesthesia Intraoperative awareness

Contacts and locations

Locations

  • Başakşehir Çam and Sakura City Hospital

    Başakşehir, Istanbul, 34480, Turkey (Türkiye)

More trials for these conditions

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