What exactly happens during peritoneal dialysis?

Blood is cleaned: Special formulated fluid is filled in the peritoneal cavity in the belly which helps remove toxins and other waste products from the blood into this solution which is then drained.

Se below: The first part is a short surgical procedure to insert a tube the inside end is in the belly and a portion is outside. The outer part is connected to a machine which exchanges fluid into and out of your belly. While the fluid is in your belly waste products from blood are filtered through the peritoneum into thos fluid which is then discarded and fresh fluid inserted. This usually is done nigh.