IRCT20180416039326N5 IRCT 2018-10-29 Esfahan University of Medical Sciences Effect of atracurium on Laryngeal Mask Airway insertion phacoemulsification Comparative evaluation of the efficacy of three different doses of atracurium on Laryngeal Mask Airway insertion conditions in patients undergoing​ phacoemulsification surgery 2017-08-23 anticipated 120 Complete https://irct.ir/trial/33161 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: An independent researcher creates random assignment cards using random computer numbers. Based on randomized sequencing, patients are enrolled in the study in three groupsRandom allocation cards are kept in an inaccessible location, in the end of the study these cards will be accessible for data analyzer, Blinding description: Patients were unaware of the dosage of the drug, and also to prevent blindness, the drugs were prepared by an anesthetist who was not during the study in the same syringes and encoded and given to the presenter for injection. The data was also collected by the project manager who was unaware of the dose of injectable drugs. 1-2 Airway management by using laryngeal airway. Intervention 1: Intervention group: In this group after induction of anesthesia patients, receives atracurium at a dose of 0.2 mg/kg. Intervention 2: Intervention group: In this group after induction of anesthesia patients, receives atracurium at a dose of 0.4mg/kg. Intervention 3: Control group: In this group after induction of anesthesia patients, receives atracurium at a dose of 0.6 mg/kg. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is a plan to make this available