A nurse assesses a client with diabetes mellitus who is admitted with an acid-base imbalance. The client's arterial blood gas values are: PH 7.36 Pa02 98 mm Hg PaCO2 33 mm Hg HC03 18 mEq/L. Which compensatory mechanism does the nurse expect the client to exhibit?

A. Increased thirst and hunger: Thirst and hunger are more commonly associated with hyperglycemia in diabetes mellitus rather than as direct compensatory mechanisms for acid-base imbalances. While hyperglycemia may contribute to dehydration, it does not directly compensate for metabolic acidosis. B. Increased urinary output: Increased urinary output may occur with osmotic diuresis in uncontrolled diabetes, but it is not a primary compensatory mechanism for correcting metabolic acidosis. Urinary output changes are secondary and do not rapidly normalize pH. C. Increased rate and depth of respirations: The client’s ABG shows metabolic acidosis (pH 7.36, HCO3 18 mEq/L, PaCO2 33 mm Hg). The lungs compensate by increasing the rate and depth of respirations (Kussmaul respirations) to blow off CO2, which helps raise pH toward normal, reflecting a respiratory compensatory response. D. Increased release of acids from the kidneys: While the kidneys help regulate acid-base balance over hours to days by excreting hydrogen ions, in this case, the primary immediate compensation is respiratory. Renal compensation is slower and not the first-line response to metabolic acidosis.