Effect of Tourniquet Application on Optic Nerve Sheath Diameter

Zonguldak Bulent Ecevit University1 enrolled

Overview

The aim of the study to investigate the effect of tourniquet application on optic nerve sheath diameter (ONSD) and cerebral oxygenation during lower extremity surgery.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Intracranial Pressure Increase

Eligibility

Sex: ALLMin age: 18 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * ASA I-II risk group over the age of 18 * Operation planned under general anesthesia * Lower extremity surgery with a tourniquet * Agreeing to volunteer for research with an informed consent form Exclusion Criteria: * Emergency surgical procedures * neurological disease, carotid disease * Previous intracranial or ocular surgery * Neurological symptoms * cerebral edema, high IntraCranial Pressure * Presence of glaucoma * Body mass index (BMI)\> 35 * Uncontrolled hypertension * Diabetic retinopathy * anemia * coronary artery disease * peripheral artery disease

Locations (1)

Zonguldak Bülent Ecevit University Medicine Faculty

Zonguldak, Kozlu, Turkey (Türkiye)

Outcomes

Primary Outcomes

optic nerve diameter

measuring the change in optic nerve diameter

Time frame: during the surgery

regional cerebral oxgenation

measurement rSo2 by Near Infrared spectroscopy

Time frame: during the surgery

Data from ClinicalTrials.gov

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