The nurse is caring for a client with chronic obstructive pulmonary disease (COPD) anticipates which of the following arterial blood gases (ABG) findings?
1) pH, 7.40; PaO2 90 mmHg; CO₂ 39 Meq/L; HCO₃, 23 mEq/L
2) pH, 7.32; PaO2,85 mmHg; CO₂ 57 Meq/L; HCO₃, 26 mEq/L
3) pH, 7.47; PaO2 82 mmHg; CO₂ 30 Meq/L; HCO₃, 31 mEq/L
4) pH, 7.31; PaO2 95 mmHg; CO₂ 22 Meq/L; HCO₃, 19mEq/L