Medicine A criterion for the diagnosis of acute respiratory distress syndrome is? A PaO2/FiO2 >400 mm Hg B PaO2/FiO2 <200 mm Hg C PaO2/Fi02 < 300 mm Hg D PCWP > 18 mm Hg 💡 Explanation A criterion for the diagnosis of acute respiratory distress syndrome is? ✓ Correct Answer: B. PaO2/FiO2 <200 mm Hg