Dexmedetomidine versus Lidocaine effect on Intracranial tension in Gynecologic Laparoscopy: Ultrasonic evaluation of optic nerve sheath diameter

INTERVENTION: dexmedetomidine Lidocaine CONDITION: ; Surgery ; Anaesthesia Anaesthesia Surgery PRIMARY OUTCOME: To evaluate and compare perioperative changes in optic nerve sheath diameter (ONSD) between patients receiving dexmedetomidine and those receiving intravenous lidocaine during gynecological laparoscopic surgery. SECONDARY OUTCOME: • To compare intraoperative heart rate (HR) between both groups. ; To compare intraoperative mean arterial pressure (MAP) ; To compare postoperative recovery characteristics, including time to achieve Modified Aldrete Score = 9. ; To compare postoperative headache severity using the Visual Analogue Scale (VAS). ; To compare the incidence and severity of postoperative nausea ; INCLUSION CRITERIA: Female patients undergoing laparoscopic gynecological surgeries Age between 18 ‐ 60 years. Body Mass Inde X< 35 kg/m2. American Society of Anesthesiologists: I‐II patients. Surgery duration more than 60 minutes