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):  Arterial Blood Gas Results  Vital Signs  pH = 7.32 PaCO2 = 62 mm Hg PaO2 = 46 mm Hg HCO3− = 28 mEq/L (28 mmol/L) Heart rate = 110 beats/min Respiratory rate = 12 breaths/min Blood pressure = 145/65 mm Hg Oxygen saturation = 76%  What action would the nurse take first?