Perioperative methemoglobinemia.
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.
Arrivabene Caruy
C A
CA
Department of Anesthesiology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), São Paulo, Brazil. cristinacaruy@hotmail.com
Cardoso
A R
AR
Cespedes Paes
F
F
Ramalho Costa
L
L
D003490:Cyanosis / Q000628:therapy; D006801:Humans; D008297:Male; D008708:Methemoglobinemia / Q000628:therapy*; D008875:Middle Aged; D010092:Oximetry; D019990:Perioperative Care; D016553:Purpura, Thrombocytopenic, Idiopathic / Q000601:surgery*; D013156:Splenectomy