In peritoneal dialysis (PD), your blood is cleaned inside your body, not outside your body. The lining of your abdomen (the peritoneum) acts as a natural filter. A cleansing solution, called dialysate, flows into your abdomen (your belly) through a soft tube called a PD catheter. The PD catheter is placed during minor surgery. Wastes and extra fluid pass from your blood into the cleansing solution.
It is common that kidney failure patients treated with peritoneal dialysis complain of skin itching. As itchy skin not only affects these patients’ life quality but also reveals some severe underlying disorders, most of them urgently want to make clear why peritoneal dialysis causes itching and the effective treatment. http://www.kidney-cares.org/dialysis/1613.html