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Ultrasound of belly fat may reveal hidden breathing risks during surgery

NCT ID NCT07723690

Knowledge-focused Sponsor: Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 23, 2026 · Last updated Jul 24, 2026 · Updated 1 time

Summary

This study investigates whether the amount of abdominal subcutaneous fat, measured by ultrasound before surgery, is linked to lung mechanics during spine surgery performed face-down under general anesthesia. Researchers will also check if simple body measurements like waist circumference and neck size relate to breathing strain. The goal is to see if a quick ultrasound could help predict which patients might have stiffer lungs during the procedure.

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 is found, it could help anesthesiologists better predict and manage breathing difficulties during prone-position surgeries.
What could go wrong
This is an observational study, not a treatment trial. It only looks for associations, so it cannot prove cause and effect.

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 120 people

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

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Nov 2026

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 undergoing elective spinal surgery in the prone position under general anesthesia at a single tertiary care hospital.

Ages

18 to 65 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: Adults aged 18 years or older Elective spinal surgery General anesthesia Prone position ASA physical status I-III Body mass index 18.5-39.9 kg/m² Exclusion Criteria: Emergency surgery Pregnancy Severe restrictive or obstructive pulmonary disease Hemodynamic instability Body mass index \<18.5 or ≥40 kg/m² Incomplete study measurements

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As listed by the trial registrant

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

Respiratory mechanics

How to take part

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  1. 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 ↗

  2. A doctor treating you

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