SPIRATION is defined as the inhalation of oropharyngeal or gastric contents into the larynx and lower respiratory tract. 1,2 Several pulmonary syndromes may occur after aspiration, depending on the amount and nature of the aspirated material, the frequency of aspiration, and the host's response to the aspirated material. 2 Aspiration pneu-monitis (Mendelson's syndrome) is a chemical injury caus...