Extracorporeal Membrane Oxygenation in Acute Respiratory Distress Syndrome Caused by Anhydrous Ammonia Burns: Two Case Reports.

Acute anhydrous ammonia burns are relatively rare but lethal and often occur as a mass occupational incident worldwide. Anhydrous ammonia mainly leads to severe inhalation injury and skin/mucosa wound because of its high water solubility and strong alkalinity. Acute respiratory distress syndrome (ARDS) induced by inhalation injury is the main cause of death. Extracorporeal membrane oxygenation (ECMO), also known as extracorporeal life support, has been recommended as the salvage treatment for severe ARDS based on low-level evidence. However, the application of ECMO in ammonia burns is still limited. Here, we presented two cases of anhydrous ammonia burn patients, one 62-year-old man with 15% total body surface area (TBSA) and one 47-year-old man with 27% TBSA, accompanying severe inhalation injury. They both developed severe ARDS and started vv ECMO on 3, 6, and 15 days after injury, respectively. ECMO lasted 118, 247, and 72 h, respectively. All ECMO were successfully weaned off although only one patient survived. Meanwhile, one patient had the coagulopathy complication of ECMO, mainly bleeding, deep vein thrombosis, and hemolysis. In conclusion, this report provided evidence for use of ECMO as supportive care in ammonia burn patients with severe ARDS.