IRCT2015011314333N28 IRCT 2015-01-31 Kermanshah University of Medical Sciences Comparison of sedation effects of sufentanil and midazolam with nitrous oxide in cataract surgery Comparation of sedation sufentanil and midazolam with nitrous oxide in patients of cataract surgery 2014-09-23 anticipated 100 Complete https://irct.ir/trial/13964 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. N/A cataract surgery. Intervention 1: The experiment group received a mixture of nitrous oxide (aspiration gas with oxygen made in Iran Darman Gaz) and oxygen company with ratio of %66 and %33 in Face mask with flow of 6 lit/min while it is fixed on the patient’s face. Extra gas and patient’s expiration were vacuumed through the mask which was linked to the air conditioning system. After 3 to 5 minutes after gas emission, operation is accomplished using regional anesthesia perry bulbar. Patients were examined for their blood pressure heart rate, vein blood oxygen saturation before the surgery, beginning the surgery and throughout the surgery every 5 minutes. They were also checked before transferring the patient to recovery room. Intervention 2: The experiment group received 5 Milligram of sufentanil (common treatment) (the injection of mic/ml made of Teharan Daroopakhsh company-Iran) and 1 milligram of IV midazolam 5 mg/ml (produced by Teharn daroopakhsh company-Iran) were indoctrinated with oxygen and air in ratio of %50 in a flow of 6 liters in minute in %50. Face with 100 to 500 milliliter liquid was used and patients went under operation using regional anesthesia perry bulbar. Then, patients were examined for their blood pressure heart rate, vein blood oxygen saturation before the surgery, beginning the surgery and throughout the surgery every 5 minutes. They were also checked before transferring the patient to recovery room.