You are asked to see a 50-year-old man 2 hours after he underwent a laparotomy for gastric resection. Lab results are as follows:
pH
7.28 (7.35–7.45)
PaCO₂
60 mm Hg (35–40)
PaO₂
60 mm Hg (85–105) with 4 L/min via nasal prongs
Bicarbonate (HCO₃)
24 mmol/L (24–30)
Which one of the following is most consistent with this clinical presentation?
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