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Knee surgery study reveals eye pressure changes from epidurals

NCT ID NCT07458321

Knowledge-focused Sponsor: Bursa City 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at 60 adults having total knee replacement to see if epidural anesthesia temporarily increases pressure inside the head, measured by ultrasound of the optic nerve sheath. Participants were randomly assigned to receive either epidural or spinal anesthesia. The goal was to understand how the volume of anesthetic affects the eye, not to treat any disease.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

60 people

The number who actually took part.

Started

Dec 2023

Finished

Apr 2024

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

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: aged 18-75 years with ASA I-III risk group who were scheduled for total knee replacement and volunteered to participate. Exclusion Criteria: Patients with contraindications to regional anesthesia, hypersensitivity to the drugs used, pregnancy, current or past ocular disease/operation history, orbital trauma, optic nerve pathology, glaucoma history; increased intracranial pressure, pseudotumor cerebri, coagulopathy and local infection; and those who refused to participate were excluded.

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As listed by the trial registrant

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

Intracranial pressure change Optic nerve sheath diameter measurement Total knee replacement

Contacts and locations

Locations

  • Bursa City Hospital

    Bursa, Merkez, Turkey (Türkiye)

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