• Surgical endoscopy · Jun 2000

    Case Reports

    Unexpected cyanosis in the surgical patient.

    • J S Lee, P A Mendez, and H O Douglass.
    • Department of Surgery, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY 14263, USA. jlee@prodigy.net
    • Surg Endosc. 2000 Jun 1;14(6):595.

    AbstractBenzocaine is a commonly used topical anesthetic present in many over-the-counter preparations. The development of methemoglobinemia, associated with the use of benzocaine, is potentially fatal. Methemoglobinemia remains unresponsive to the administration of oxygen alone and, in fact, results in greater tissue hypoxemia than the usual monitoring techniques indicate. We report two cases of benzocaine-induced methemoglobinemia occurring 3 months apart at the same institution. A brief discussion regarding methemoglobin is presented.

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