Occupational phosgene poisoning: a case report and review.

Phosgene is a highly toxic gas to which some workers may be occupationally exposed. This case report demonstrates the possibility of refrigeration workers suffering phosgene poisoning after heating certain chlorinated fluorocarbons ('freons'). The need to suspect phosgene exposure and observe such patients is emphasized, especially in view of the delay in clinical deterioration observed in some patients who subsequently develop adult respiratory distress syndrome.