 In this study the investigators aim to test whether the air-QR creates an airway seal pressure that is similar to the LMA-ProSealTM, whether the position of the air-QR in relation to the vocal cords, as assessed by fiberoptic endoscopy, is similar to that of the LMA-ProSealTM and whether airway morbidity is similar between the air-QR and the LMA-ProSealTM. 