The Nurse Finds a Patient Admitted with Asthma and Pneumonia

The nurse finds a patient admitted with asthma and pneumonia restless, anxious, complaining of increasing difficulty breathing, and stridor. Because of suspected status asthmaticus, an arterial blood gas is ordered. Which result requires an immediate intervention?

A) pH 7.30
B) PaCO₂ 48 mm Hg
C) PaO₂ 50 mm Hg
D) SpO₂ 88%