A nurse is reviewing the arterial blood gas values of a client who has chronic kidney disease. Which of the following sets of values should the nurse expect?

Choice A reason: The arterial blood gas values pH 7.25, HCO3- 19 mEq/L, and PaCO2 30 mm Hg are indicative of metabolic acidosis, which is commonly seen in chronic kidney disease (CKD). In CKD, the kidneys lose their ability to excrete hydrogen ions and retain bicarbonate, leading to a decrease in blood pH (acidosis) and a reduction in bicarbonate (HCO3-). The PaCO2 value is slightly lower as a compensatory mechanism by the lungs to help balance the pH.Choice B reason: The values pH 7.30, HCO3- 26 mEq/L, and PaCO2 50 mm Hg suggest a state of respiratory acidosis with partial metabolic compensation. This is not typically expected in chronic kidney disease. Respiratory acidosis occurs when there is hypoventilation, leading to an accumulation of carbon dioxide (CO2) in the blood. The bicarbonate (HCO3-) level is within the normal range, indicating that it is not the primary disorder in this context.Choice C reason: The values pH 7.50, HCO3- 20 mEq/L, and PaCO2 32 mm Hg are consistent with respiratory alkalosis, where the pH is elevated due to hyperventilation leading to a loss of CO2. This condition is not typically associated with chronic kidney disease. The bicarbonate level is slightly below normal but not enough to indicate a significant metabolic disorder.Choice D reason: The values pH 7.55, HCO3- 30 mEq/L, and PaCO2 31 mm Hg indicate metabolic alkalosis, which is characterized by an elevated pH and increased bicarbonate. This condition can occur due to excessive loss of acids (e.g., vomiting) or an increase in bicarbonate but is not typically expected in chronic kidney disease.