A nurse reviews the arterial blood gas results of a client with a pH of 7.48, PaCO2 of 33 mm Hg, and HCO3 of 23 mEq/L. Which acid-base imbalance should the nurse identify, and what is the priority nursing intervention?

Metabolic acidosis: administer sodium bicarbonate to correct low bicarbonate levels.

Respiratory alkalosis: encourage the client to breathe into a paper bag to increase CO2 retention.

Metabolic alkalosis: monitor for hypokalemia and restrict bicarbonate intake.

Respiratory acidosis: assess airway patency and prepare to assist with ventilation if needed.