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Rivista di Anestesia, Rianimazione, Terapia Antalgica e Terapia Intensiva
Minerva Anestesiologica 2007 June;73(6):377-9
Arrivabene Caruy C. A., Cardoso A. R., Cespedes Paes F., Ramalho Costa L.
Department of Anesthesiology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), São Paulo, Brazil
We report a case of a male patient who underwent splenectomy for idiopathic thrombocytopenic purpura. Oxygen saturation was 92% by pulse oximetry and cyanosis was apparent during the perioperative period. Methemoglobin (metHb) levels were 10.4%. After removal of the tracheal tube, intravenous methylene blue (1 mg/kg) was administered because of persistently low SpO2 levels (87%). During preanesthetic evaluation, the patient did not inform the anesthesiologist that he had been taking dapsone.