Definition: a single- or double-lumen tube with an inflatable cuff at the distal end that, after being passed through the larynx and trachea, is positioned so that ventilation is restricted to one lung; a single-lumen tube is placed in the mainstem bronchus of the lung; a double-lumen tube is positioned at the tracheal carina to permit ventilation of either or both lungs.
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Examples: glitazone, GI cocktail, etc.