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The Combitube is a double‐lumen tube with a distal and a proximal balloon similar in design to the LT [52]. If the distal part is correctly positioned in the esophagus (the most common position), insufflation through the longer, blue‐colored lumen will deliver oxygen indirectly to the trachea through holes in the blue‐colored tube at the level of the vocal cords. If the distal part is positioned in the trachea, insufflation through the shorter, white‐colored tube will deliver oxygen directly to the trachea. Although once common, Combitubes are infrequently used in contemporary EMS practice due to associated complications, including oropharyngeal bleeding, esophageal perforation, and aspiration pneumonitis [53].

Other airway devices no longer used in contemporary prehospital EMS practice include the esophageal obturator airway, esophageal gastric tube airway, and pharyngotracheal lumen airway. Other SGAs currently available include the cuffed oropharyngeal airway and the Cobra perilaryngeal airway (Engineered Medical Systems, Indianapolis, Indiana), among others.

Figure 3.9 Laryngeal Mask Airway.