When the nurse is analyzing the results of a patients arterial blood gases (ABGs), which finding indicates the need for most immediate action?
a. The arterial oxygen saturation (SaO2) is 92%.
b. The partial pressure of oxygen in arterial blood (PaO2) is 59 mm Hg.
c. The partial pressure of CO2 in arterial blood (PaCO2) is 31 mm Hg.
d. The bicarbonate level (HCO3) is 29 mEq/L.