• Am J Emerg Med · Sep 1992

    Review Case Reports

    Methemoglobinemia secondary to automobile exhaust fumes.

    • R F Laney and R S Hoffman.
    • Department of Emergency Medicine, Morristown Memorial Hospital, NJ.
    • Am J Emerg Med. 1992 Sep 1; 10 (5): 426-8.

    AbstractMethemoglobinemia is an uncommon cause of cyanosis. A 28-year-old male presented to the emergency department cyanotic and short of breath after exposure to noxious automobile fumes. He did not improve with the administration of 100% oxygen therapy. The initial arterial blood gas with cooximetry was: pH of 7.38, PaCO2 of 43 mm Hg, PaO2 of 118 mm Hg, measured oxygen saturation of 70%, and a methemoglobin level of 24.8%. Methylene blue was given (2 mg/kg intravenously) and the patient's symptoms resolved. On the following day he was discharged home without complication. A comprehensive review of the literature revealed no reported cases of methemoglobinemia secondary to accidental exposure to exhaust fumes.

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