NNCC CNN Certification Sample Questions

The NNCC Certified Nephrology Nurse Certification Sample Question Set on this page is designed to familiarize you with the actual NNCC CNN 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 Nephrology Nurse (CNN) 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 Nephrology registered nurses, registered nurses practicing across multiple nephrology areas, and related nursing roles working in settings such as Home dialysis programs, inpatient and critical-care nephrology settings, CKD and kidney transplant care 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 Nephrology Nurse exam, particularly in areas such as Kidney disease pathophysiology and complications, nephrology interventions and kidney replacement therapies, patient education and interdisciplinary clinical care. You can use these sample questions as a starting point, then progress to the NNCC CNN 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 CNN Sample Questions:

01. A 60-year-old patient with chronic kidney disease (CKD) stage 3 tells the nurse about using ibuprofen (Advil) two or three times weekly for chronic knee pain and a magnesium-containing antacid most evenings, adding that a friend recommended both and that anything sold without a prescription must be safe enough.
Which teaching point should the nurse address first?
a) Chronic knee pain should be evaluated so that a long-term plan for the joint can be established
b) Both products are available without a prescription yet can affect the kidneys, so each one should be discussed before it is used/
c) The anti-inflammatory drug reduces blood flow within the kidney and should be replaced with an analgesic that does not act on prostaglandins
d) Magnesium accumulates when kidney function is reduced, so the antacid should be changed to a different preparation

02. A nurse has finished teaching a patient with chronic kidney disease (CKD) stage 4 how to read food labels for sodium content.
Which method best evaluates whether the patient has learned the material?
a) Providing a printed handout and asking the patient to review it at home with a family member
b) Asking the patient to compare two food labels aloud and choose between them/
c) Asking the patient whether the information was clear, whether it was useful and whether any questions remain
d) Giving the patient a written quiz on sodium content to complete before the next visit

03. A patient in the seventh day of continuous kidney replacement therapy has become disoriented at night, pulls at the circuit lines, and does not recognize the unit. The family is distressed and asks whether the kidney failure has affected the brain permanently.
Which nursing action is most appropriate?
a) Reassure the family that the confusion is caused by the retained toxins and will clear as the therapy continues
b) Request sedation so that the patient does not pull at the lines, and limit visiting until the confusion settles
c) Explain that confusion of this kind is common in critical illness and usually settles, and review sleep, sedation and orientation with the team/
d) Explain that the brain has been affected by the illness, and that the extent will be known only on recovery

04. A peritoneal dialysis program has recorded a peritonitis rate that has risen over the past year. The program manager asks the nurse to lead the review.
Which first step is most likely to identify a modifiable cause?
a) Analyze each episode for the organism and the patient's technique/
b) Review the program's rate against published rates and against its own figures from previous years
c) Retrain every patient in the program in aseptic exchange technique over the coming quarter
d) Introduce a routine antibiotic prophylaxis protocol for all patients in the program

05. During a home visit the nurse notes that a patient's cat sleeps on the chair where the exchanges are performed, and that the patient has had two episodes of peritonitis in six months.
Which nursing action is most appropriate?
a) Advise the patient to rehome the cat, since keeping an animal is not compatible with this therapy
b) Check that the chair is washed before each exchange and that the supplies are laid on a clean towel
c) Arrange transfer to hemodialysis, since repeated peritonitis indicates the home is unsuitable for this therapy
d) Establish with the patient a place for exchanges the animal cannot enter, so that the tubing is never within its reach, and review the procedure/

06. Lena Okafor, 34 years old, has autosomal dominant polycystic kidney disease. Her father received a transplant in his fifties.
She asks the nurse why her kidney function is still reported as normal when imaging shows cysts in both kidneys.
Which explanation is most accurate?
a) Cysts enlarge for years while the remaining tissue compensates, so filtration falls late in the course/
b) Filtration is measured from a formula that cannot detect the changes this disease produces, and it underestimates them in young adults
c) Fluid inside the cysts is reabsorbed and returned to the circulation, so waste clearance continues
d) The cysts sit outside the filtering tissue and never involve nephrons, so filtration is not affected

07. The care partner of a home hemodialysis patient has performed every cannulation and every setup for two years. At this visit the care partner says, "Some weeks I dread the treatment days more than he does."
Which nursing action is most appropriate?
a) Find out what the care partner finds most difficult and discuss which tasks could be shared/
b) Suggest that the patient and care partner discuss whether home therapy remains the right choice
c) Commend the care partner's dedication and reinforce how much the patient depends on that support
d) Assess the care partner's technique and arrange a refresher session to build confidence with the tasks

08. The spouse of a patient on peritoneal dialysis has performed all the exchanges for eighteen months. At this visit the spouse appears exhausted, mentions having given up a part-time job, and says quietly, "I cannot leave the house anymore."
Which nursing action is most appropriate?
a) Suggest that the patient and spouse consider transferring to in-center hemodialysis, at least for a period of respite
b) Explore the spouse's situation and involve the social worker/
c) Reassure the spouse that the exchanges become easier with experience and commend the care provided
d) Assess the patient's ability to perform the exchanges independently and begin teaching to relieve the spouse

09. Anthony Reyes, 66 years old, began peritoneal dialysis three months ago and performs his own exchanges at home.
Mr. Reyes is now seen with redness and tenderness extending from the exit site along the line of the catheter toward the abdomen, and purulent drainage at the site. The effluent remains clear and he has no abdominal pain.
Systemic antibiotics have been prescribed. Which further step would the nurse most appropriately anticipate?
a) An increase in the number of daily exchanges, so that any organism entering the abdomen is washed out
b) Instillation of antibiotic into the abdomen with a prolonged dwell, so that the drug reaches the tunnel from within
c) Removal of the catheter if the infection does not resolve, since organisms persist around the buried cuff/
d) Application of a topical antimicrobial to the exit site alone, since the drainage identifies the skin as the source

10. A 3-year-old child with chronic kidney disease (CKD) stage 4 has crossed downward through two growth percentiles and refuses most oral feeds. The parents report mealtimes have become distressing and that the child vomits after being urged to eat. Nutritional intake is documented as well below the estimated requirement.
Which intervention should the nurse advocate for first?
a) Concentration of the child's usual formula so that the same volume delivers more calories
b) Restriction of dietary phosphorus and potassium to reduce the burden on the failing kidneys
c) Evaluation for supplemental enteral feeding so the requirement is met without contest at meals/
d) A structured behavioral feeding program delivered by the parents at each meal in the family home

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 CNN 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 Nephrology Nurse (CNN) sample questions, please let us know by emailing us at feedback@medicoexam.com