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?

Choice A reason: Calcium acetate is not used to lower potassium levels. Potassium levels in the blood are typically managed through dietary restrictions, medications like potassium binders, and dialysis in patients with CKD. The normal range for blood potassium levels is 3.5 to 5.2 mEq/L for adults. Choice B reason: Calcium acetate can increase calcium levels in the blood, not decrease them. It is important to monitor calcium levels to avoid hypercalcemia, which can lead to complications such as vascular calcification and cardiac issues. The normal range for blood calcium levels is 8.6 to 10.2 mg/dL. Choice C reason: Calcium acetate is used to lower phosphate levels in patients with CKD. It works by binding to dietary phosphate in the intestines, forming insoluble calcium phosphate that is excreted in the stool. This helps prevent hyperphosphatemia, a common issue in CKD patients. The normal range for blood phosphate levels is 2.5 to 4.5 mg/dL. Choice D reason: Calcium acetate does not directly affect blood pH levels. Blood pH is regulated by the kidneys and lungs, and the normal range is 7.35 to 7.45. While CKD can affect acid-base balance, calcium acetate’s primary role is to manage phosphate levels.