Pulmonary edema following the relief of acute upper airway obstruction is unusual and unpredictable. The cause is usually attributed to pulmonary and hemodynamic changes resulting from high negative intrathoracic pressures during obstructed respiration. The incidence of this problem is not known. Why pulmonary edema develops in only certain patients is also unclear. We reviewed the records of 27 consecutive adult patients admitted and treated for acute upper airway obstruction. Three of 27 (11%) developed pulmonary edema. Age, sex, diagnosis, duration of obstruction, history of cardiopulmonary disease, and perioperative fluid administration were evaluated. No differences were noted between those who did and those who did not develop pulmonary edema. Pulmonary edema following acute upper airway obstruction appears to be more common than is generally appreciated, however, no specific factors seem related to its occurrence.
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