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Face-Down surgery: does breathing mechanics affect brain oxygen?

NCT ID NCT07862257

Knowledge-focused Sponsor: Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Oct 07, 2026 · Last updated Oct 09, 2026 · Updated 2 times

Summary

Researchers are observing 100 adults having elective lumbar disc surgery to see whether changes in breathing mechanics during prone positioning relate to brain oxygen levels. Patients receive routine anesthesia and are placed face-down for surgery. The team records ventilator readings and uses near-infrared sensors on the forehead to track brain oxygen before, during, and after prone positioning. No treatments or anesthesia plans are altered for the study.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If a link emerges between breathing mechanics and brain oxygen during prone surgery, anesthesiologists could refine ventilator settings to protect the brain in patients who need this position.
What could go wrong
This observational study cannot prove cause and effect, and it involves a single surgery type in 100 adults. Findings may not apply to other surgeries, positions, or patients with different health profiles.

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

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 2026

Expected to finish

Jan 2027

An estimate. End dates often move.

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 aged 18-75 years undergoing elective lumbar disc herniation surgery in the prone position under general anesthesia at Sancaktepe Şehit Prof. Dr. İlhan Varank Training and Research Hospital.

Ages

18 to 75 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: * Age 18-75 years * Written informed consent * Scheduled for elective lumbar disc herniation surgery * ASA physical status I-III * Volume-controlled ventilation Exclusion Criteria: * History of increased intracranial pressure * Conditions preventing placement of cerebral NIRS probes * Development of severe intraoperative complications * Significant hemodynamic instability * Known cerebrovascular disease or severe carotid artery disease * Hemoglobin \<10 g/dL or anticipated major bleeding * Severe heart failure (EF \<40%) * Advanced COPD or restrictive lung disease * Orthopedic or neurological conditions preventing tolerance of the prone position

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Conditions

The condition(s) this trial relates to.

Intervertebral Disc Displacement lumbar disk disease

As listed by the trial registrant

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

Cerebral oxygenation Lumbar disc herniation Respiratory mechanics

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

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Contacts and locations

Locations

  • Sancaktepe Sehit Prof. Dr. Ilhan Varank Training and Research Hospital

    RECRUITING

    Istanbul, Istanbul, 34000, Turkey (Türkiye)

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