What Is the Interpretation of a Blood Gas That Shows

Multiple Choice

What is the interpretation of a blood gas that shows a pH of 7.44, a PaCO₂ of 50 mm Hg, a PaCO₂ of 48 mm Hg, and an [HCO₃^-] of 33 mEq/L in a patient with advanced COPD?

A) Uncompensated respiratory acidosis
B) Partially compensated respiratory alkalosis
C) Compensated metabolic alkalosis
D) Acute hyperventilation superimposed on chronic respiratory acidosis