Book excerpt: This fifth edition of the Nephrology Nursing CertificationReview Guide is a popular and valuable resource for nursesas they prepare to sit for the Nephrology Nursing CertificationCommission (NNCC) examinations.This guide can be used for boththe Certified Nephrology Nurse (CNN) and the Certified DialysisNurse (CDN) exams based on the blueprint from the NephrologyNursing Certification Commission (NNCC). This edition includesa rationale for each answer. When possible, a reference has been provided; if a reference was not available, the answer was basedon expert opinion. A section for the Advanced Practice Registered Nurse in Nephrology focused on pharmacologyand diagnosis is also included.