Certified Nephrology Nurse Certification (CNN) Practice Exam 2026 – Comprehensive All-in-One Study Guide for Exam Success!

In the management of advanced chronic kidney disease (CKD), it is crucial to address dietary modifications to help manage the disease's progression and mitigate complications. Limiting phosphorus intake is a recommended dietary intervention for patients with advanced CKD due to the kidneys' decreased ability to excrete phosphorus. High levels of phosphorus can lead to complications such as bone disease and cardiovascular issues, as the body can begin to extract calcium from the bones to maintain normal serum levels.

Phosphorus is prevalent in many foods, particularly in dairy products, processed foods, and some meats. Patients are often advised to avoid foods high in phosphorus and limit their overall phosphorus intake to prevent the buildup of phosphorus in the blood, which can lead to hyperphosphatemia. This dietary change can help preserve bone health and reduce the risk of cardiovascular problems associated with high phosphorus levels.

The other dietary options mentioned would not be appropriate for a patient with advanced CKD. For instance, increasing sodium intake can lead to fluid retention and hypertension, both of which are already concerns in CKD. A high protein diet can increase the burden on the kidneys and accelerate their decline, while decreasing fluid restriction could exacerbate fluid overload, especially in patients approaching end-stage renal disease. Thus, limiting phosphorus intake stands