Comparing two drugs for improving outcome in a nose surgery

INTERVENTION: Intervention1: Dexmedetomidine: Dexmedetomidine iv infusion 0.4mcg/kg/hr from induction till the end of surgery Control Intervention1: Remifentanil: Remifentanil iv infusion 0.05mcg/kg/min from induction till the end of surgery CONDITION: Health Condition 1: O‐ Medical and Surgical PRIMARY OUTCOME: Quality of the surgical field in terms of Surgical Field Rating Scale of six points.Timepoint: Every 10 mins till the end of surgery. SECONDARY OUTCOME: Intraoperative hemodynamics i.e MAP and HR, and emergence agitation measured by Richmond Agitation‐Sedation ScaleTimepoint: Intraoperative hemodynamics will be assessed at preinduction, after infusion of study drug at incision, every 10 minutes post incision, and 10 minutes post infusion cessation, and emergence agitation will be assessed post extubation INCLUSION CRITERIA: Patients posted for elective Endoscopic Sinus Surgery under general anaesthesia, ASA Physical Status I and II, patients willing to provide written informed consent.