Laryngoscopy and tracheal intubation may cause hemodynamic changes, cartilage dislocation and sore throat and requires some levels of muscle relaxation which could interfere with nerve monitoring in cochlear implant surgery. On the other hand, LMA does not require muscle relaxation as deep as needed for tracheal tubes. It also might cause less hemodynamic changes in patients.
Objectives: comparing the effects and side effects of LMA and laryngeal tube for airway management in children candidate for cochlear implantation, concerning the airway pressure, arterial blood O2 saturation, end tidal CO2, cough, spasm, apnea, sore throat, vomiting and dysrhythmia.
Design: this study is a randomized, single-blinded, mono center clinical trial
Setting and Conduct: Patients divide randomly into two groups of LMA and Tracheal Tube. Anesthesia technique would be the same in both groups. During surgery, arterial O2 saturation, end-tidal CO2, airway pressure and pulse rate would be monitored in both groups and would be compared. Moreover, degreel of bleeding and surgeon's satisfaction of surgical field would be compared. In post operative period presence or absence of cough, spasm, apnea, vomiting, sore throat and dysrhythmia would be sought and compared too.
Patients and Criteria: Sixty deaf children between 3 to 17 years old in ASA classification I and II candidate for cochlear implant, Exclusion criteria would be upper respiratory tract infection and any findings accounting for difficult airway
Main outcome: arterial O2 saturation, end-tidal CO2, airway pressure, pulse rate, cough, spasm, apnea, sore throat, vomiting and dysrhythmia.