This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
In the suppo of the child with severe ARDS, appropriate goals for pH, oxygenation, and PCO2 include: 
Select and explain. 
A. pH 7.40; PaO2 90 mm Hg; PCO2 40 mm Hg, B. pH 7.50; PaO2 125 mm Hg; PCO2 25 mm Hg, C. pH 7.35; PaO2 100 mm Hg; PCO2 45 mm Hg, D. pH 7.25; PaO2 60 mm Hg; PCO2 60 mm Hg
D: pH 7.25; PaO2 60 mm Hg; PCO2 60 mm Hg
Answer: D: pH 7.25; PaO2 60 mm Hg; PCO2 60 mm Hg 
Explanation: This reflects the lung protection strategy with permissive hypercarbia. There is no need for hyperoxia, and PaO2 >90 mm Hg is a sign to reduce the FiO2 and thus potentially decrease the risk of oxygen toxicity.