A nurse evaluates the following arterial blood gas and vital…

A nurse evaluates the following arterial blood gas and vital sign results for a client with chronic obstructive pulmonary disease (COPD):  Parameter Client Lab Results Normal Range pH 7.32 7.35 – 7.45 PaCO2 62 mm Hg 35 – 45 mm Hg PaO2 46 mm Hg 80 -100 mm Hg HCO3- 29 mEq/L 22 – 28 mEq/L Heart Rate 110 beats per minute 60 -100 beats per minute What action would the nurse take first?