The Nurse in the Emergency Department Receives Arterial Blood Gas

The nurse in the emergency department receives arterial blood gas results for four recently admitted patients with obstructive pulmonary disease. The results for which patient will require the most rapid action by the nurse?

A) pH 7.28, PaCO₂ 50 mm Hg, and PaO₂ 58 mm Hg
B) pH 7.48, PaCO₂ 30 mm Hg, and PaO₂ 65 mm Hg
C) pH 7.34, PaCO₂ 33 mm Hg, and PaO₂ 80 mm Hg
D) pH 7.31, PaCO₂ 58 mm Hg, and PaO₂ 64 mm Hg