IRCT20140223N115938 IRCT 2014-02-23 Shiraze University of Medical Sciences ،Researh Blood loss in Rhinoplasty surgery A comparison of Remifentanil and Labetalol infusion on intraoperative bleeding during Rhinoplasty surgery 2014-02-20 anticipated 60 Complete https://irct.ir/trial/15047 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. N/A q00-q99. Intervention 1: After being anesthetized patients before surgical incision a group of 30 patients drug Labetalol with dose /4-3 mg/ kg/hr beginning to the end of the operation with a 50 cc syringe infusion pump operation will start. Mean Arterial Pressure (MAP) is in the range of 55-65 mm/Hg .In this area we have to see how much bleeding. Intervention 2: After being anesthetized patients before surgical incision a group of 30 patients drug Remifentanil with dose /1-3 mic/kg/min beginning to the end of the operation with a 50cc syringe infusion pump operation will start. Mean Arterial Pressure( MAP) is in the range of 55-65 mm/Hg .In the area we have to see how much bleeding.