A 62-Year-Old Man Was Admitted for a Suspected Myocardial Infarction

A 62-year-old man was admitted for a suspected myocardial infarction. Current ABG values on room air are as follows: PaO₂ = 56 mm Hg, PaCO₂ = 34 mm Hg, pH = 7.47, and HCO₃⁻ = 26 mEq/L. Which of the following is the most appropriate form of respiratory therapy for this patient?

A) Oxygen therapy
B) Noninvasive mechanical ventilation
C) He/O₂ therapy (80/20)
D) CPAP by mask

Correct Answer:

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