Figure 42-13 Insertion of the Combitube. A, The tongue and mandible are lifted with one hand, and the Combitube is inserted in the direction of the natural curvature of the pharynx with the other hand. The printed ring is aligned with the teeth. B, The pharyngeal cuff is inflated with 100 mL of air, and the distal cuff is inflated with 15 mL. C, Ventilation is begun through the longer no. 1 tube because placement is usually in the esophagus. D, If ventilation is absent and the stomach is being insufflated, begin ventilation through the no. 2 connecting tube. (Courtesy of Sheridan Catheter Corp., Argyle, NY.)