In this type of dialysis, the dialysis fulid is pumped for a time into the peritoneal cavity which is space around gut. This cavity is lined by peritoneum. Peritoneum contains blood vessels. When we place dialysis fluid in peritoneal cavity, waste materials from peritoneal blood vessels diffuse into the dialysis fluid, which then drained out. This type of dialysis can be performed at home, but must be done every day.