The Laboratory Has Just Called with the Arterial Blood Gas

The laboratory has just called with the arterial blood gas (ABG) results on four patients. Which result is most important for the nurse to report immediately to the health care provider?

A) pH 7.34, PaO2 82 mm Hg, PaCO2 40 mm Hg, and O2 sat 97%
B) pH 7.35, PaO2 85 mm Hg, PaCO2 50 mm Hg, and O2 sat 95%
C) pH 7.46, PaO2 90 mm Hg, PaCO2 32 mm Hg, and O2 sat 98%
D) pH 7.31, PaO2 91 mm Hg, PaCO2 50 mm Hg, and O2 sat 96%