Successful extracorporeal life support in respiratory failure after copper sulphate ingestion.

A 44-year-old woman intentionally ingested a solution of copper sulphate. She had minimal intravascular haemolysis and methemoglobinaemia but developed acute respiratory distress syndrome (ARDS) 4 hours after acute copper sulphate poisoning. This required extracorporeal membrane oxygenation (ECMO) management in the intensive care unit. Subsequently, she improved clinically and was successfully weaned from ECMO. Acute copper sulphate poisoning can cause severe pulmonary toxicity even in the absence of other serious symptoms. Therefore, a physician treating acute copper sulphate poisoning should look out for respiratory symptoms even in the absence of other common symptoms. We suggest early initiation of venovenous ECMO in those with ARDS following copper sulphate poisoning.