Certified Nephrology Nurse Certification (CNN) Practice Exam

Continuous Cycler Peritoneal Dialysis (CCPD), also known as automated peritoneal dialysis, typically involves multiple cycles of dialysis performed overnight while the patient is sleeping. This method utilizes a machine called a cycler that administers and drains dialysate fluid at set intervals throughout the night, optimizing the dialysis process.

The correct answer indicates that CCPD generally consists of 3-6 cycles per night. This range allows for an effective exchange of dialysate, ensuring that adequate clearance of toxins and excess fluid occurs while minimizing the time and burden on the patient during waking hours. These cycles typically include a fill, dwell, and drain phase, each of which plays a critical role in the dialysis process. During the dwell phase, toxins, electrolytes, and excess fluids are exchanged through the peritoneal membrane, allowing the patient to benefit from the dialysis treatment.

The number of cycles may vary based on the individual's needs, the volume of dialysate used, and specific treatment protocols, but the 3-6 cycle range is a common standard in practice to achieve effective dialysis while balancing the patient's comfort and lifestyle. This effective approach is especially advantageous for patients requiring flexibility and who may have varying schedules during the day.