Figure 49-38 Technique for providing unilateral bronchopulmonary lavage. A left clear plastic double-lumen endotracheal tube allows ventilation to the left lung during lavage of the right lung (and vice versa). Normal saline is infused and drained by gravity; clamps on the connection tubes determine the direction of fluid flow. (See the text for details.) (From Benumof JL: Anesthesia for Thoracic Surgery. Philadelphia, WB Saunders, 1987.)