[Pulmonary edema due to venous air embolism during craniotomy: a case report].

We present a 35-year-old healthy male patient who developed pulmonary edema (PE) probably due to venous air embolism during craniotomy in the semi-sitting position for arteriovenous malformation (AVM). Anesthesia was maintained with oxygen, nitrous oxide, propofol and fentanyl. During craniotomy, end-tidal carbon dioxide pressure decreased suddenly from 26 to 9 mmHg.