 The esophageal tracheal combitube ETC was first marketed in 1987 by Frass, Frenzer, and Zahler as an alternative airway to traditional endotracheal intubation. The combitube is a polyvinyl chloride double lumen supraglottic airway that can be placed blindly, quickly, and with minimal training. The device is available in two sizes, 37F for small adults 4-6 feet tall and 41F for larger adults up to 198 cm height. It is now widely used in Wisconsin for the pre-hospital airway management algorithm for trauma patients. 