Society for Pediatric Anesthesia
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A 12-year-old male with a large anterior mediastinal mass is scheduled for mediastinoscopy and biopsy. He has a cough but is otherwise asymptomatic.  Immediately after induction, his blood pressure and end-tidal CO₂ fall. He has no palpable pulse. Which of the following MOST likely contributed to the patient’s cardiac arrest?

A. Intravenous induction with propofol instead of inhalation induction with sevoflurane
B. Administration of rocuronium to a train of four (TOF) <0.70
C. Positional change from supine to left lateral decubitus
D. Application of Continuous Positive Airway Pressure (CPAP)

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