A. Preoperative Settings:
Patients will undergo standard pre-anesthetic assessment, including review of medical history, fasting status, and laboratory investigations. Eligibility will be confirmed based on inclusion and exclusion criteria. After obtaining informed consent, patients will be randomly assigned into two groups using a computer-generated randomization table and sealed envelopes.
B. Intraoperative and Postoperative Settings:
All patients will receive standardized general anesthesia with continuous monitoring. Following completion of surgery and while still under anesthesia, the study drug (either dexmedetomidine or labetalol) will be administered over 10 minutes. Extubation will be performed thereafter.
Hemodynamic parameters including arterial blood pressure and heart rate will be recorded at baseline, during drug administration, and at specific intervals post-extubation. Extubation quality will be assessed using a five-point scale, and sedation levels using the Richmond Agitation-Sedation Scale. Adverse events such as hypotension, bradycardia, or respiratory issues will be documented and managed as per protocol.
This structured approach aims to evaluate which agent provides better control of stress responses during emergence from anesthesia in hypertensive patients undergoing craniotomy.
