The Optimal Dose of Mannitol for Intraoperative Brain Relaxation During the Operation of Aneurysmal Subarachnoid Hemorrhage

Exclusion Criteria

• •Patients who do not agree to the surgery.
• •Patients who have congestive heart failure and kidney insufficiency.
• •Patients who have pre-operative electrolyte imbalance.
• •Patients who did not take the frontotemporal pterygoid approach.
• •Patients with contraindications to mannitol due to low blood pressure.
• •Patients who have had more than 3 days from bleeding to surgery.
• •Patients with intracranial hematoma.
• •Patients with Hunt-Hess grades 4-5.
• •Patients who received intravenous mannitol within 6 hours before surgery.
• •Patients who underwent ventricle puncture and drainage surgery before surgery.