Certified Dialysis Nurse Practice Test 2025 – All-in-One Resource for Exam Success!

Hemodialysis is the correct answer because it specifically involves the use of a machine, known as a dialysis machine or artificial kidney, to filter waste products and excess fluid from the blood. During this process, blood is drawn from the patient's body, passed through the dialysis machine where it is cleansed, and then returned to the body. This method effectively removes toxins such as urea and creatinine, which accumulate in patients with kidney failure.

In contrast, peritoneal dialysis, including continuous ambulatory peritoneal dialysis, utilizes the peritoneal membrane inside the abdomen as a natural filter. This approach involves infusing a dialysate solution into the abdominal cavity, allowing waste products to diffuse out of the blood through the peritoneum, without the assistance of a machine for the filtering process. Apheresis, on the other hand, refers to a procedure in which blood is separated into its components, but it does not specifically focus on the removal of waste products in the same manner as hemodialysis does.