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?

pH: Calcium acetate is not directly related to changes in blood pH. Therefore, monitoring pH levels would not indicate the effectiveness of the medication for CKD. B) Calcium: Calcium levels may be affected by calcium acetate, but the primary goal of using calcium acetate in CKD is to reduce phosphate levels, not calcium levels. Therefore, monitoring calcium levels would not directly indicate the effectiveness of the medication. C) Potassium: Calcium acetate is not typically used to affect potassium levels. Monitoring potassium levels would not indicate the effectiveness of calcium acetate for CKD. D) Phosphate: This is the correct answer. Calcium acetate is a phosphate binder commonly used in CKD to help lower elevated phosphate levels. A decrease in phosphate levels in the blood would indicate that the medication is having the desired effect in controlling phosphate levels, which is important in managing CKD and preventing complications associated with hyperphosphatemia. Therefore, monitoring phosphate levels is essential to assess the effectiveness of calcium acetate therapy in CKD.