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Spine surgery position may swell optic nerve, study finds

NCT ID NCT07395115

Knowledge-focused Sponsor: Istanbul University - Cerrahpasa 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study observed 65 adults undergoing spine surgery while lying face-down (prone position). Researchers measured changes in optic nerve sheath diameter using ultrasound and checked vision before and after surgery. The goal was to identify factors that might lead to vision changes, but no treatment was tested.

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 successful, this could help doctors understand how to prevent rare vision problems after spine surgery.
What could go wrong
This was a small, observational study with no intervention, so it cannot prove any treatment works. Results may not apply to all patients.

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

65 people

The number who actually took part.

Started

Dec 2024

Finished

Jun 2025

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 scheduled for elective spine surgery requiring prone positioning at a university hospital setting.

Ages

18 years and older

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 years * Scheduled to undergo elective spine surgery in the prone position * American Society of Anesthesiologists (ASA) physical status I-III * Preoperative visual acuity measurable using a Snellen chart Exclusion Criteria: * Preexisting ophthalmologic diseases affecting optic nerve or visual acuity (e.g., glaucoma, optic neuropathy, diabetic retinopathy) * Previous eye trauma or history of orbital surgery * Inability to obtain reliable ultrasonographic ONSD measurements (e.g., orbital deformity, ocular infection)

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As listed by the trial registrant

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

Prone position Spinal surgery

Contacts and locations

Locations

  • Istanbul University - Cerrahpaşa, Cerrahpaşa Faculty of Medicine Hospital

    Istanbul, Turkey (Türkiye)

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