Which of the following is not a potential hazard of intermittent positive-pressure breathing?

The initial blast wave associated with an incendiary explosion is likely to cause:

A) lacerations and abrasions. B) compression injury to ears, lungs, and hollow air-filled organs. C) sudden death. D) burns.

While caring for a critically injured patient at the scene of a motor vehicle crash, an emergency physician bystander stops at the scene to assist. Which of the following procedures performed by the physician would require the physician to accompany the patient to the hospital in the ambulance?

A) ECG interpretation B) A pericardiocentesis C) Orotracheal intubation D) Intraosseous cannulation