Toxicology USMLE Step 1 Practice Question
A 38-year-old woman undergoes peripheral nerve block before surgery. Minutes after injection, she develops circumoral numbness, tinnitus, and generalized seizures followed by ventricular arrhythmias. Vital signs show BP 88/52 mmHg, HR 142/min, RR 28/min. Serum glucose is normal. She denies prior seizure history. ECG demonstrates prolonged QRS duration. Accidental intravascular injection of which of the following local anesthetic most likely caused this toxidrome?
Answer choices
- AHeparin
- BIpratropium
- CFurosemide
- DLidocaine or bupivacaineCorrect answer
- ENitroprusside
- FRopivacaine
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