An 80-Year-Old Patient Breathing Room Air Has an ABG Analysis

An 80-year-old patient breathing room air has an ABG analysis. The nurse interprets which results as normal?

A) pH 7.38, arterial carbon dioxide (PaO₂) 82 mm Hg, PaCO₂ 40 mm Hg, and O₂ sat 92%
B) pH 7.32, PaO₂ 85 mm Hg, PaCO₂ 55 mm Hg, and O₂ sat 90%
C) pH 7.48, PaO₂ 90 mm Hg, PaCO₂ 31 mm Hg, and O₂ sat 98%
D) pH 7.52, PaO₂ 91 mm Hg, PaCO₂ 42 mm Hg, and O₂ sat 94%