Four devices were compared in a simulated resuscitation scenario : ILMA ( Intavent Direct Ltd , Buckinghamshire , United Kingdom ) , Cobra PLA ( Engineered Medical Systems Inc , Indianapolis , IN ) , Supraglottic Airway Laryngopharyngeal Tube ( SALT ) ( ECOLAB , St. Paul , MN ) , and Air-Q ( Mercury Medical , Clearwater , FL ) .