Which dialysis method uses the lining of the peritoneal cavity to filter waste from the blood?

Which dialysis method uses the lining of the peritoneal cavity to filter waste from the blood?

• A. Hemodialysis
• B. Peritoneal dialysis
• C. Extracorporeal blood filtration
• D. Ultrafiltration

Answer: (B)

Peritoneal dialysis uses the lining of the peritoneal cavity as the filtering membrane. A dialysate solution is placed into the abdomen through a catheter. Waste products and excess fluid diffuse from the blood vessels in the peritoneum into the dialysate across this membrane, driven by concentration and osmotic gradients. After a dwell period, the dialysate is drained, taking the wastes with it. This internal filtering method is different from hemodialysis, which filters blood outside the body using an artificial membrane in a machine. Ultrafiltration refers to the fluid-removal aspect and is a mechanism within dialysis, not the method that uses the peritoneal lining itself. So, the described approach is peritoneal dialysis.

Peritoneal dialysis uses the lining of the peritoneal cavity as the filtering membrane. A dialysate solution is placed into the abdomen through a catheter. Waste products and excess fluid diffuse from the blood vessels in the peritoneum into the dialysate across this membrane, driven by concentration and osmotic gradients. After a dwell period, the dialysate is drained, taking the wastes with it. This internal filtering method is different from hemodialysis, which filters blood outside the body using an artificial membrane in a machine. Ultrafiltration refers to the fluid-removal aspect and is a mechanism within dialysis, not the method that uses the peritoneal lining itself. So, the described approach is peritoneal dialysis.