A Patient Has Coronary Artery Bypass Graft Surgery and Is

A patient has coronary artery bypass graft surgery and is transported to the surgical intensive care unit at noon.He is placed on mechanical ventilation.Interpret his initial arterial blood gas levels:
pH 7.31
PaCO₂ 48 mm Hg
Bicarbonate 22 mEq/L
PaO₂ 115 mm Hg
O₂ saturation 99%

A) Normal arterial blood gas levels with a high oxygen level
B) Partly compensated respiratory acidosis, normal oxygen
C) Uncompensated metabolic acidosis with high oxygen levels
D) Uncompensated respiratory acidosis; hyperoxygenated

Correct Answer:

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