CompletedNot Applicable

A Prospective Observational Study on Factors Affecting Optic Nerve Sheath Diameter and Visual Acuity in Prone Spinal Surgery

Turkey (Türkiye)65 participantsStarted 2024-12-03

Plain-language summary

The prone position in spinal surgery can alter intracranial pressure and optic nerve sheath diameter (ONSD) and potentially lead to visual complications. This prospective observational study aimed to identify factors influencing ultrasonographic ONSD changes and visual acuity in patients undergoing spinal surgery.

Who can participate

Age range18 Years

SexALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

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)

What they're measuring

Change in ultrasonographic optic nerve sheath diameter (mm)

Timeframe: Baseline (preoperative, supine), after prone positioning (15 minutes after positioning), and at the end of surgery (intraoperative, before repositioning to supine).

Trial details

NCT IDNCT07395115

SponsorIstanbul University - Cerrahpasa

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2025-06-04

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