A 63-year-old patient with COPD is seen in the pulmonary cli…
A 63-year-old patient with COPD is seen in the pulmonary clinic for a routine appointment. The analysis results of an ABG sample drawn while the patient is breathing air are: pH 7.40 PCO2 57 mm Hg PO2 42 mm Hg HCO3- 35 mEq/L BE +8 mEq/L SO2 (calc) 77% Which of the following is the most appropriate NEXT step?