RT Book, Section A1 Pinyavat, Teeda A2 Houck, Philipp J. A2 Haché, Manon A2 Sun, Lena S. SR Print(0) ID 1105553659 T1 METHEMOGLOBINEMIA T2 Handbook of Pediatric Anesthesia YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 978-0-07-176935-8 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1105553659 RD 2024/04/20 AB A 4-year-old undergoes an uneventful esophagogastroduodenoscopy (EGD) but is noted to be cyanotic in the postanesthesia care unit 1 hour later. He appears agitated and tachypneic, and has perioral cyanosis. Despite being placed on 100% oxygen by face mask, his SaO2 is 86%. His lungs are clear, and his stat chest x-ray is normal. An arterial blood sample is chocolate-colored. PaO2 and calculated oxygen saturation are normal. Cetacaine spray (14% benzocaine, 2% butamben, 2% tetracaine) was used for topicalization.