• J Am Soc Echocardiogr · Nov 1996

    Case Reports

    Toxic methemoglobinemia after topical anesthesia for transesophageal echocardiography.

    • S E Grauer and G D Giraud.
    • Department of Medicine, Oregon Health Sciences University, Portland, USA.
    • J Am Soc Echocardiogr. 1996 Nov 1;9(6):874-6.

    AbstractTopical benzocaine spray is an anesthetic agent that is commonly used during transesophageal echocardiography (TEE). This agent is believed to be relatively safe because of very low systemic absorption. We report a case of toxic methemoglobinemia induced by benzocaine use for pharyngeal anesthesia during TEE. Physicians who perform TEE and use benzocaine or other topical anesthetics need to be familiar with this potential complication and have the necessary treatment readily available.

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