A client with chronic kidney disease (CKD) is receiving calcium acetate 667 mg PO. A decrease in which blood value indicates to the nurse that the medication is having the desired effect?

A. Phosphate: Calcium acetate is used primarily to manage hyperphosphatemia in patients with chronic kidney disease (CKD). It works by binding to dietary phosphate in the gut, preventing its absorption, which helps lower phosphate levels in the blood. A decrease in phosphate levels indicates that the calcium acetate is effectively controlling phosphate levels. B. pH: While maintaining normal pH levels is important in CKD, calcium acetate does not directly affect blood pH. The primary role of calcium acetate is to manage phosphate levels rather than pH balance. C. Calcium: Calcium acetate is a phosphate binder and does not primarily target calcium levels. It can influence calcium levels indirectly, but a decrease in calcium is not the direct measure of the medication's effectiveness. Instead, monitoring phosphate levels is more indicative of the medication’s effectiveness. D. Potassium: Calcium acetate does not have a direct effect on potassium levels. It is specifically used to manage phosphate levels in CKD patients. Changes in potassium levels would not indicate the effectiveness of calcium acetate.