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Belly fat vs. body mass index: which better predicts spine surgery risks?

NCT ID NCT07688265

Knowledge-focused Sponsor: Marmara University Pendik Training and Research Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 07, 2026 · Last updated Jul 08, 2026 · Updated 1 time

Summary

This study looks at how different types of obesity—central (belly fat) versus peripheral (fat elsewhere)—affect blood loss and complications during major lower back surgery. Researchers will measure pressure inside the abdomen and blood loss in 90 adults having lumbar spine surgery. The goal is to see if where fat is stored matters more than overall weight for surgical outcomes.

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 it works, this could help surgeons tailor care based on a patient's fat distribution, potentially reducing risks during spine surgery.
What could go wrong
This is a small observational study, so it can show links but not prove cause and effect. Results may not apply to all patients or surgeries.

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 90 people

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

Expected to start

Jun 2026

An estimate. Start dates often move.

Expected to finish

Jun 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 18-80 years with ASA physical status I-III scheduled for elective major lumbar spinal surgery (decompression and/or instrumentation) at Marmara University Pendik Training and Research Hospital and Asaf Ataseven Hospital, Istanbul, Turkey. Patients are classified by obesity phenotype based on BMI and waist-to-hip ratio. Patients with renal failure, coagulation disorders, anemia, pregnancy, prior lumbar surgery, or emergency procedures are excluded.

Ages

18 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: * Age 18-80 years * ASA Physical Status Classification I-III * Scheduled for elective major lumbar spinal surgery (canal stenosis decompression and/or instrumented fusion) * No prior lumbar spinal surgery * Written informed consent obtained Exclusion Criteria: * \- Pediatric patients (\<18 years) * Pregnancy * Emergency surgical procedures * Pre-existing renal failure * Coagulation disorder * Pre-existing anemia * Known drug allergy relevant to study medications * Inability to obtain written informed consent

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Conditions

The condition(s) this trial relates to.

Intra-Abdominal Hypertension lumbar disk degenerative disorder lumbar spinal stenosis Obesity obesity disorder spinal stenosis

As listed by the trial registrant

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

Intraabdominal hypertension Intraoperative blood loss Lumbar degenerative disease Lumbar spinal stenosis Obesity Perioperative complications

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.

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  2. A doctor treating you

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