Evaluation of Supraclavicular Brachial Plexus Blocks at Various Volumes: Impact on Optic Nerve Sheath Diameter

Inclusion Criteria: * Patients aged between 18 and 50, of both genders, with planned surgery on the finger, wrist, elbow joint, and distal region, and classified as ASA I-II, will be included in the study. In this study, patients will be informed about the anesthesia method and the tests to be conducted, and those who consent will be asked to sign an informed consent form as voluntary participants. Exclusion Criteria: * Patients who do not accept the procedures and tests * Those with diseases that may cause increased intracranial pressure * Patients with severe heart failure * Patients with second or third degree atrioventricular block * Patients with unstable angina history * Patients with COPD and chronic asthma * Patients with a history of myocardial infarction (MI) within the last 6 weeks * Patients with a heart rate below 50 beats/min * Patients with systolic blood pressure below 90 mmHg * Patients with liver failure * Patients with kidney failure * Patients for whom supraclavicular block anatomically cannot be performed * Those with neurological or psychological diseases that make it difficult to assess the tests * Patients allergic to any of the study drugs * Pregnant women