Q1382. stridor, and rapidly turns cyanotic. His friend attempts the Heimlich maneuver unsuccessfully. On arrival of emergency services, attempts at endotracheal intubation fail, and oxygen saturation continues to fall rapidly. What is the most appropriate next step to secure the airway?

Q1456. revealed bronchial breath sounds. He is hemodynamically stable and not confused. On examination, his respiratory rate is 20/min and BP 110/70 mmHg. Lab reports show urea levels of 44 mg/dL. What is the next best step in the management of this patient?

Q1525. A patient undergoing surgery shows a sudden drop of end-tidal CO2 (ETCO2) to 15mmHg to 5mmHg capnography. What does this most likely indicate?