Certified Dialysis Nurse Review - CDN Practice Exam & Study Guide (35 Most Asked Questions)

Preparing for the Certified Dialysis Nurse (CDN) certification takes more than memorizing facts—it takes the ability to recognize complications fast, apply standards safely, and think like a dialysis nurse in real clinical scenarios. This review is built for RN/LPN dialysis staff, nephrology nurses, and CDN exam candidates who want a high-yield practice exam experience that strengthens test performance and day-to-day decision-making under pressure.

In this 35-question CDN practice exam and study guide, you’ll review core hemodialysis and peritoneal dialysis concepts that show up repeatedly on certification tests. The session drills vascular access assessment and troubleshooting, including what a palpable thrill means for AVF patency, how to respond to sudden loss of thrill suggesting access thrombosis, and why site rotation matters to prevent aneurysm formation. You’ll also sharpen your ability to identify high-risk intradialytic events such as first-use syndrome, dialysis disequilibrium syndrome, and air-embolism prevention practices, along with practical alarm troubleshooting like persistent high venous pressure and what it implies clinically.

You’ll reinforce the “why” behind dialysis prescriptions and safety standards by covering diffusion versus ultrafiltration, convection (solvent drag) for middle-molecule clearance, and the role of bicarbonate in correcting metabolic acidosis. The questions also walk through fluid management and dry weight logic, the most common causes of intradialytic hypotension and late-treatment muscle cramps, and emergency priorities for severe hyperkalemia. On the PD side, you’ll practice first-line troubleshooting for slow inflow, and you’ll learn why cloudy effluent is treated as peritonitis until proven otherwise. Infection prevention and water safety are emphasized as well, including strict aseptic technique to reduce CLABSI risk and why chlorine/chloramine or aluminum contamination can be dangerous for dialysis patients.

If you’re using this to study, treat it like a timed mini-exam, pause before each answer, and track the topics you miss so you can tighten your weak areas quickly. Subscribe for more dialysis certification practice tests and renal nursing review sessions, comment with the question numbers you want explained in more depth, and share this with a coworker or study partner preparing for the CDN exam.

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