• J Clin Monit · Jul 1994

    Case Reports

    Chronic methemoglobinemia: improving hemoglobin saturation monitoring during anesthesia.

    • J Sprung, D L Bourke, C F Mackenzie, and P Thomas.
    • Anesthesiology Service, Baltimore Veterans Affairs Medical Center, MD.
    • J Clin Monit. 1994 Jul 1; 10 (4): 267-9.

    AbstractMethemoglobin interferes with the accuracy of pulse oximetry data. Methemoglobinemia is caused by many factors, both congenital and acquired. However, the increasing usage of dapsone, which converts hemoglobin to methemoglobin, is increasing the number of patients with methemoglobinemia. We present the case of a patient with dapsone-induced methemoglobinemia who was successfully treated with methylene blue, which converts methemoglobin back to hemoglobin.

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