We reported a case of an abrupt hypotension and hypoxemia which lasted more than 60 min due to emboli of tumor at the orifice of the pulmonary artery during operation. Although the emboli were removed under the cardiopulmonary bypass (CPB) and later the patient regained good respiratory and hemodynamic conditions, he had a disturbance of consciousness after the operation. We began oxygen hyperbaric therapy (OHP) from the 6th postoperative day under spontaneous ventilation. His consciousness improved quickly after the beginning of OHP. We conclude that OHP and CPB might be useful to treat the postoperative disturbance of consciousness due to hypotension and hypoxemia during operation.

Akiyama, Enzan, Matsumoto, Yamazaki, Oota, Suzuki, , , (1993). [Postoperative disturbance of consciousness due to tumor emboli of the orifice of pulmonary artery]. Masui. The Japanese journal of anesthesiology, 1993 Nov;42(11):1692-5. https://www.ncbi.nlm.nih.gov/pubmed/8254883