The aim of our study was to evaluate the success rate of fiberoptic-guided endotracheal intubation through an Intubating Laryngeal Mask Airway ( ILMA ) , a Cobra Perilaryngeal Airway ( Cobra PLA ) , and a C-Trach Laryngeal Mask Airway ( C-Trach ) in patients whose necks are stabilized in a hard cervical collar .