Which therapy addresses metabolic acidosis in CKD?

Prepare thoroughly for the Genitourinary System Disorders Test. Explore flashcards and multiple choice questions with explanations. Enhance your readiness for the examination!

Multiple Choice

Which therapy addresses metabolic acidosis in CKD?

Metabolic acidosis in CKD stems from the kidney’s reduced ability to excrete acid and regenerate bicarbonate, so hydrogen ions accumulate and serum bicarbonate falls. Providing bicarbonate directly supplies the buffering capacity the kidneys can’t maintain, which neutralizes the excess acid and raises the pH toward normal. This is why bicarbonate therapy is the standard first-line treatment: it directly corrects the acid-base disturbance, helps preserve muscle and bone by reducing the need for bone to buffer acid, and can improve overall nutritional status. In practice, bicarbonate is given orally to bring serum bicarbonate into a normal or near-normal range (often roughly 22–26 mEq/L), with dosing adjusted based on lab values and patient tolerance. Watch for fluid overload or high sodium intake, since bicarbonate products add sodium. Why the other options aren’t the direct fix: restricting potassium helps with high potassium levels but doesn’t correct acidosis; phosphate binders target phosphate management, not acid-base balance; dialysis can correct acidosis by removing acids but is generally reserved for severe cases or when conservative measures fail, making bicarbonate therapy the appropriate initial approach for metabolic acidosis in CKD.

Metabolic acidosis in CKD stems from the kidney’s reduced ability to excrete acid and regenerate bicarbonate, so hydrogen ions accumulate and serum bicarbonate falls. Providing bicarbonate directly supplies the buffering capacity the kidneys can’t maintain, which neutralizes the excess acid and raises the pH toward normal. This is why bicarbonate therapy is the standard first-line treatment: it directly corrects the acid-base disturbance, helps preserve muscle and bone by reducing the need for bone to buffer acid, and can improve overall nutritional status.

In practice, bicarbonate is given orally to bring serum bicarbonate into a normal or near-normal range (often roughly 22–26 mEq/L), with dosing adjusted based on lab values and patient tolerance. Watch for fluid overload or high sodium intake, since bicarbonate products add sodium.

Why the other options aren’t the direct fix: restricting potassium helps with high potassium levels but doesn’t correct acidosis; phosphate binders target phosphate management, not acid-base balance; dialysis can correct acidosis by removing acids but is generally reserved for severe cases or when conservative measures fail, making bicarbonate therapy the appropriate initial approach for metabolic acidosis in CKD.

More practice questions