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Can eye scans predict brain fog after surgery?
NCT ID NCT07264764
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looked at 50 adults having laparoscopic abdominal surgery to see if changes in the optic nerve sheath (the lining around the nerve connecting the eye to the brain) and brain oxygen levels could predict short-term memory or thinking problems after surgery. Researchers measured these using ultrasound and a forehead sensor. The goal was to better understand how the surgery's effects on pressure inside the belly might affect the brain.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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50 people
The number who actually took part.
- Started
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Jul 2020
- Finished
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May 2021
- Lead sponsor
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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
\- Aged 20-60 years, ASA I-III, all patients who will undergo upper abdominal surgery without any excluded criteria.
- Ages
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20 to 60 years
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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 20-60 years; * American Society of Anesthesiologists \[ASA\] I-III) * scheduled for elective laparoscopic abdominal surgery (e.g., cholecystectomy, appendectomy, hernia repair) under general anesthesia Exclusion Criteria: * pregnancy, * known neurological or ocular disease, * prior ocular surgery, * significant cardiovascular disease (moderate to severe), * chronic obstructive pulmonary disease (COPD), * conversion from laparoscopy to open laparo-tomy.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Duzce University Medicine School, Anesthesiology and Reanimation Department
Düzce, 81620, Turkey (Türkiye)
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Other studies related to the condition(s) this trial covers.
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