Background: This prospective, randomized, controlled trial compares the performance of the pediatric i-gel (Intersurgical Ltd., Wokingham, United Kingdom) with the Ambu AuraOnce laryngeal mask (Ambu A/S, Ballerup, Denmark) in anesthetized and ventilated children. Methods: With ethics committee approval and written informed consent, the authors included 208 children, aged 0 -17 yr, scheduled for elective day-surgery under general anesthesia. The primary outcome variable was oropharyngeal