Clinical Comparison of the Airway Devices

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 Healthcare/Mallinckrodt Nellcor, Pleasanton, Calif).