Intraoperative Optic Nerve Sheath Diameter Changes After Laparoscopic Surgery

Kocaeli University

Status: Completed

Conditions: Optic Nerve Sheath Diameter; Intracranial Pressure Increase

Treatments: Other: Optic nerve sheath measurement

Study type: Interventional

Funder types: Other

Identifiers

NCT06209034

KÜ GOKAEK-2023/19.12

Details and patient eligibility

About

Laparoscopic surgery is a widely used alternative to open surgery; Advantages include reduced bleeding and pain intensity, shorter hospital stay, and improved cosmetic results.

Laparoscopic surgery involves the creation of a carbon dioxide (CO2) pneumoperitoneum to facilitate a clear surgical view, which can result in increased intracranial pressure (ICP).

Ultrasonographic measurement of optic nerve sheath diameter (ONSD) is a simple, non-invasive, yet reliable technique for ICP assessment.Ultrasonographic assessment of optic nerve sheath diameter (ONSD) has been proposed as a non-invasive measurement of intracranial pressure.

Full description

Ultrasonographic measurement of optic nerve sheath diameter (ONSD) is a simple, non-invasive, yet reliable technique for ICP assessment. Previous studies have demonstrated that ultrasonographic measurement of ONSD correlates with the degree of ICP and can detect intracranial hypertension in a variety of clinical settings.

It was planned to measure the optic nerve sheath throughout the surgery with the help of a linear ultrasound probe.

Ultrasonographically, in each measurement, the optic nerve sheath diameter (ONSD) was detected 3 mm behind the entry point of the optic nerve into the globe in both eyes. ONSD will be measured bilaterally 3 mm behind the papilla. It will be evaluated by transverse measurement for each optic nerve.

Enrollment: 55 patients

Sex: All

Ages: 18 to 75 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 18-75 aged patients
• American Society of Anesthesiologists Classification (ASA) I-II-III patients
• Patients undergoing laparoscopic surgery

Exclusion criteria

• American Society of Anesthesiologists Classification (ASA) IV-V patients
• Those with known ophthalmic disease
• Those with a history of ophthalmic surgery
• Those with any known neurological disorder
• History of intracranial hypertension
• Patients who will undergo open abdominal surgery

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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55 participants in 1 patient group

Optic nerve sheath measurement

Other group

Description:

Optic nerve sheath diameter (ONSD) was detected 3 mm behind the entry point of the optic nerve into the globe in both eyes in each ultrasonographic measurement. ONSD was measured bilaterally 3 mm posterior to the papilla. Transverse measurements were made for each optic nerve.

Treatment:

Other: Optic nerve sheath measurement