NNCC CDN Certification Sample Questions

The NNCC Certified Dialysis Nurse Certification Sample Question Set on this page is designed to familiarize you with the actual NNCC CDN exam format and question types. These sample questions help you understand how questions are structured and what to expect on test day. While they provide a useful starting point, they represent only a limited preview of the real exam experience.

These sample questions are intended for evaluation and familiarization only. To understand exam style, pacing, and reasoning patterns more clearly, we recommend trying our online sample practice environment. If you are preparing for the NNCC Certified Dialysis Nurse (CDN) and want to assess your readiness more rigorously, structured, timed, scenario-based practice is recommended. This approach aligns with the cognitive demands and professional expectations typically associated with Dialysis registered nurses, nephrology registered nurses, dialysis nurse educators/supervisors working in settings such as In-center hemodialysis facilities, outpatient dialysis centers, dialysis units and related settings.

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The demo introduces core concepts, while full-length premium simulations provide deeper, scenario-based coverage that more closely reflects the actual cognitive demands of the NNCC Certified Dialysis Nurse exam, particularly in areas such as Hemodialysis patient care and complication management, dialysis technical principles and medication administration, patient education/infection control/interdisciplinary care. You can use these sample questions as a starting point, then progress to the NNCC CDN Certification Practice Exam for stronger readiness. Our premium simulations are designed to mirror real exam conditions, helping you refine reasoning, pacing, and decision-making before your official exam attempt.

NNCC CDN Sample Questions:

01. A new staff member asks why the external surfaces of the machine and the chair are disinfected after every patient rather than at the end of each shift.
Which explanation is most accurate?
a) Blood contamination of surfaces is frequently invisible, so every station is treated as contaminated
b) Regulatory surveys require a documented between-patient cleaning record
c) The internal fluid pathway is disinfected at the same time
d) The disinfectant loses its activity over a shift, so one application would not be enough

02. A patient with type 1 diabetes whose kidney function has declined to stage 5 has begun having hypoglycemic episodes on the same insulin doses she has taken for years.
Which explanation should the nurse give her?
a) Her appetite has fallen with uremia, so she is eating less than her doses assume
b) Her kidneys no longer produce glucose, so she has lost a source of circulating sugar
c) Failing kidneys clear insulin more slowly, so each dose lasts longer
d) Her insulin has become more potent because uremia increases receptor sensitivity

03. Bianca Ferraro, 34 years old, has ESRD from focal segmental glomerulosclerosis. She works full time and dialyzes on an evening shift through a right forearm AV fistula.
Levocarnitine (Carnitor) is newly prescribed intravenously for Ms. Ferraro.
The nurse should administer it:
a) before each treatment, so that its distribution is complete
b) after each treatment, since it is cleared by dialysis
c) into the dialysate, to cross the membrane
d) orally between treatments, since the intravenous route is reserved

04. Grace Abernathy, 78 years old, began in-center hemodialysis three weeks ago for ESRD secondary to hypertensive kidney disease. She lives alone, wears bifocals and a hearing aid, and tells the nurse she has never had to manage a medical condition before.
The nurse has taught Mrs. Abernathy how to check her new fistula for a thrill each morning.
Which approach best evaluates whether she has learned the skill?
a) Ask her to locate and describe the thrill on her own arm while the nurse observes
b) Ask her whether she feels confident checking the fistula, and offer to repeat the teaching
c) Give her a printed diagram and ask her to point out where she would place her fingers
d) Ask her to explain in her own words where the thrill is felt and what it should feel like

05. Junko Nakamura, 55 years old, has ESRD secondary to lupus nephritis and has dialyzed for six years. She takes calcium acetate (PhosLo) and reports that her serum phosphorus has been above target at every monthly review this year.
Ms. Nakamura reports aching in her hips and ribs, intense generalized itching that keeps her awake, and a wrist fracture after a minor fall.
These findings together are most consistent with:
a) amyloid deposition in the joints
b) chronic kidney disease–mineral and bone disorder
c) inadequate dialysis with retention of middle molecules and other solutes
d) peripheral neuropathy from accumulated uremic toxins

06. Tomas Reyes, 49 years old, has ESRD secondary to hypertensive nephrosclerosis and a history of coronary artery disease. He dialyzes through a left upper-arm AV graft.
Mr. Reyes asks why he feels less short of breath on the days after his treatments.
Which component of the dialysate accounts primarily for the correction of his metabolic acidosis?
a) Glucose, which supplies substrate for the metabolism of acid
b) Sodium, which sets the osmolality on the dialysate side
c) Calcium, which binds hydrogen ions as they cross the membrane
d) Bicarbonate, which diffuses into the blood down its gradient

07. Which kidney function is not replaced by hemodialysis?
a) Activation of vitamin D
b) Regulation of extracellular fluid or electrolyte balance
c) Removal of nitrogenous waste
d) Correction of metabolic acidosis

08. Within the first few minutes of a treatment with a new dialyzer, a patient becomes restless, reports a sense of impending doom and difficulty breathing, and develops flushing and urticaria over the chest and neck. Blood pressure is falling.
Which problem should the nurse suspect first?
a) Intradialytic hypotension from an ultrafiltration rate exceeding the plasma refilling rate
b) A pyrogenic reaction to bacterial products crossing the membrane from the dialysate
c) A severe hypersensitivity reaction to a component of the extracorporeal circuit
d) Disequilibrium from a rapid fall in the plasma urea concentration

09. Water used to make dialysate is treated far more thoroughly than drinking water primarily because:
a) municipal water is not treated to any medical standard
b) the patient's blood is exposed to a very large volume of it across a treatment
c) dialysate must be sterile, and municipal water carries organisms that would infect the patient
d) the machine's proportioning system requires water free of dissolved minerals to mix accurately

10. A blood leak alarm sounds. The nurse tests the dialysate outflow and confirms that blood is present, and the patient is alert with stable vital signs.
Which action is most appropriate?
a) Reduce the ultrafiltration rate to lower the transmembrane pressure and complete the prescribed time
b) Return the blood at a reduced pump speed, then change the dialyzer and resume with new bloodlines
c) Bypass the dialysate circuit and continue the treatment while the technician replaces the detector
d) top the pump and discard the circuit without returning its contents

Answers:

For full-length, timed, scenario-based practice aligned with the official exam framework - and to build pacing, consistency, and confidence - explore our Premium NNCC CDN Certification Practice Exam.

Note: These sample questions are not official exam questions and are intended only for familiarization and study purposes. If you find any typos or data entry errors in these NNCC Certified Dialysis Nurse (CDN) sample questions, please let us know by emailing us at feedback@medicoexam.com