critical care medicine
How To Insert an Esophageal Tracheal Double Lumen Tube (Combitube) or a King Laryngeal Tube
Relevant Anatomy for Combitube or King Laryngeal Tube Insertion
Aligning the ear with the sternal notch may help open the upper airway and establishes the best position to view the airway if endotracheal intubation becomes necessary. The degree of head elevation that best aligns the ear and sternal notch varies depending on the patient's age and body habitus. 