Anesthesia on Optic Nerve Sheath Diameter

The Effect Of Minimal and High Flow Anesthesia on Optic Nerve Sheath Diameter in Laparotomic Gynecological Surgery

Different amounts of anesthetic gas can be used in the obstetric gynecological surgery operations to be performed with open method. Researchers aimed to compare the effect of gas changes on intraocular nerve diameter by ultrasonography.

A total of 80 patients who underwent laparotomic gynecological surgery were divided into two groups prospectively: high flow of 2 L/min and minimal flow of 0.5 L/min. Anesthesia was maintained with 50% oxygen-50% air at 2 L/min and desflurane at 1.1 MAC in Group 1 (n=40) and with 50% oxygen-50% air at 2 L/min and desflurane at 1.1 MAC in Group 2 (n=40). After 10-15 minutes, group 2 was administered minimal flow with 50-60% oxygen-40-50% air at 0.5 L/min and desflurane, and 10 minutes before the end of the surgery, the patients were switched to high flow with 50% oxygen-50% air at 2 L/min.

Inclusion Criteria:

• Aged 18-65 years
• ASA I-II
• Who underwent laparotomic gynecological surgery

Exclusion Criteria:

• Patients with obstructive pulmonary disease
• Patients with decompensated diabetes, those with a fasting period of more than 12 hours -Acute alcohol intoxication
• Chronic alcohol use
• Who refuse to participate in the study
• Who are not cooperative, do not speak Turkish
• Who had known eye disease (glaucoma, retinal detachment), had a previous history of eye surgery,
• Increased intracranial pressure findings (intracranial lesion, previous cerebrovascular diseases
• Body mass index of > 40kg/m2
• ASA > III