After weaning and extubation, a patient on a cool aerosol mask at 40% O2 develops moderate hypoxemia and hypercapnia, with a falling pH. Which of the following actions would you recommend at this time?
A. increase the nebulizer oxygen concentration to 60%
B. apply bi-level positive airway pressure via mask
C. administer 50 mEq IV sodium bicarbonate
D. re-intubate and apply volume control ventilation
Answer: B. apply bi-level positive airway pressure via mask
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