IRCT2013011512134N1 IRCT 2013-01-20 Vice chancellor for research, Shahid Beheshti University of Medical Sciences , Loghman Hospital Is LMA applicable in cochlear implant? Comparing the effects and side effects of LMA and tracheal tube in children under general anesthesia for cochlear implantation. 2013-03-01 anticipated 60 Complete https://irct.ir/trial/12261 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Other, Other design features: Patients are not aware of the details of the study but they do not know which patient is in which group. On the other hand, patients are mostly small children who are not familiar with anesthetic process.So we believe that both the parents and patients are blind about the study. All the parents would sign the consent. 2-3 Condition 1: cochlear implant. Condition 2: Hearing Loss, Deafness. Intervention 1: Intervention group: airway management with Laryngeal Mask Airway (LMA) without laryngoscpy at induction. Intervention 2: Control group: airway management with tracheal tube after laryngoscopy with McGill blade at induction.