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  • Title: Methemoglobinemia revisited: an important complication after transesophageal echocardiography.
    Author: Tsigrelis C, Weiner L.
    Journal: Eur J Echocardiogr; 2006 Dec; 7(6):470-2. PubMed ID: 16275102.
    Abstract:
    Methemoglobinemia induced by the use of benzocaine-containing topical anesthetics is a rare, but potentially lethal complication after transesophageal echocardiography (TEE). We report a patient who developed methemoglobinemia after TEE. A review of the literature was performed and the majority of cases of benzocaine-induced methemoglobinemia reported thus far have occurred in patients undergoing TEE, endotracheal intubation, esophagogastroduodenoscopy, and bronchoscopy. All of these procedures have become more frequent than before, and there is a need to reemphasize the potential problem and to reconsider the need for further use of topical anesthetics.
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