A nurse is educating a client about the different types of dialysis. The client asks which type of dialysis uses the peritoneal membrane as a filter. Which of the following responses by the nurse is accurate?
A “Hemodialysis uses the peritoneal membrane as a filter.”
B “Continuous ambulatory peritoneal dialysis (CAPD) uses the peritoneal membrane as a filter.”
C “Automated peritoneal dialysis (APD) uses the peritoneal membrane as a filter.”
D “Peritoneal dialysis does not use the peritoneal membrane as a filter.”
The correct answer and Explanation is :
The correct answer is B: “Continuous ambulatory peritoneal dialysis (CAPD) uses the peritoneal membrane as a filter.”
Explanation:
Dialysis is a medical treatment that helps filter waste products and excess fluid from the blood when the kidneys are not functioning properly. There are two main types of dialysis: hemodialysis and peritoneal dialysis.
Hemodialysis involves using a machine and an artificial filter (dialyzer) to remove waste products and excess fluids from the blood. In this method, blood is drawn out of the body, filtered through the dialyzer, and then returned to the body. Hemodialysis does not utilize the peritoneal membrane.
Peritoneal dialysis (PD), on the other hand, uses the body’s own peritoneal membrane, which lines the abdominal cavity, as a natural filter. In this process, a sterile solution called dialysate is introduced into the abdominal cavity through a catheter. Waste products and excess fluids diffuse from the blood vessels in the peritoneal membrane into the dialysate, which is then drained from the abdomen after a set period.
There are two main types of peritoneal dialysis:
- Continuous Ambulatory Peritoneal Dialysis (CAPD): This is a manual process where the patient performs exchanges of dialysate several times a day. The patient can carry out their daily activities while the dialysate is in the abdominal cavity.
- Automated Peritoneal Dialysis (APD): This type utilizes a machine called a cycler to perform exchanges, typically during the night while the patient sleeps.
Both CAPD and APD rely on the peritoneal membrane as the filter, making option B the accurate response. Understanding the distinction between these types of dialysis is crucial for educating patients about their treatment options and what to expect during the process.