 The purpose of this study is to evaluate a new supra-glottic airway device, the Disposable Laryngeal Tube Suction LTS-D; King Systems, Noblesville, IN. We propose to test its ease of insertion, position within the airway, patency of drain tube and anatomic sealing properties during spontaneous ventilation in anesthetized patients. The study device will be compared to the ProSeal Laryngeal Mask Airway PLMA, LMA North America Inc. and the Esophageal Tracheal Combitube ETC; Tyco HealthcareMallinckrodt Nellcor, Pleasanton, Calif. 