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 and is placed on mechanical ventilation.Interpret the 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