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Abstract
In this study also compared the influence of their use of postoperative pain and recovery time.Sixty adult patients undergoing middle ear surgery were included. Patients were randomly divided into three equal groups. Patients were assigned to receive magnesium sulphate, fentanyl or nitroglycerin and propranolol ASA physical status I, age group ranged from 18to60.We found that all drug groups had the ability to maintain hypotensive anesthesia and provide a fair surgical field the difference between the three drug groups is in the time at which the target mean arterial pressure was reached