ATI Medsurg Proctored Final Exam Related

Review ATI Medsurg Proctored Final Exam related questions and content

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?

  • A. pH 7.25, HCO3- 19 mEq/L, PaCO2 30 mm Hg
  • B. pH 7.40, HCO3- 24 mEq/L, PaCO2 38 mm Hg
  • C. pH 7.45, HCO3- 28 mEq/L, PaCO2 40 mm Hg
  • D. pH 7.50, HCO3- 30 mEq/L, PaCO2 45 mm Hg
Correct Answer: A

Rationale: The correct answer is A (pH 7.25, HCO3- 19 mEq/L, PaCO2 30 mm Hg). In chronic kidney disease, the kidneys are unable to excrete acid effectively, leading to metabolic acidosis. The pH is low (acidotic) due to the accumulation of acids. The bicarbonate (HCO3-) is low (19 mEq/L) as the kidneys are unable to reabsorb and regenerate bicarbonate effectively. The PaCO2 is low (30 mm Hg) as the respiratory system compensates by increasing the respiratory rate to blow off carbon dioxide in an attempt to normalize the pH. Choices B, C, and D have pH values within normal range and do not reflect the expected acidosis in chronic kidney disease.