Medicine Which one of the following distinguishes ARDS (acute/adult respiratory distress syndrome) from cardiogenic pulmonary oedema ? A Normal PaO2 B Normal pulmonary arterial pressure C Normal arterial-alveolar gradient D Normal PaCO2 💡 Explanation Which one of the following distinguishes ARDS (acute/adult respiratory distress syndrome) from cardiogenic pulmonary oedema ? ✓ Correct Answer: B. Normal pulmonary arterial pressure