The etiology of pulmonary edema in fresh water near-drowning.

Drowning is a significant cause of death in children and young adults. It is thought to result from the inhalation of either fresh or sea water resulting in lung damage and ventilation-perfusion mismatching. The clinical course, chest roentgenographs, serum electrolytes, alveolar-arterial oxygen gradient, and complete blood count of 10 fresh water drowning victims with pulmonary edema were recorded. Six responded dramatically clinically and radiographically within 24 hours, and most did not have significant alterations of their serum electrolyte levels, especially serum chloride. On the basis of the rapid clearing of the pulmonary edema and the lack of evidence of significant fluid aspiration, neurogenic pulmonary edema is postulated to have played a role in the development of the pulmonary edema in these patients.