Systems for performing peritoneal dialysis

[Subject] Provide a system and a method for performing passage continuation style dialysis two or more times.[Means for Solution] Medical treatment fluid which it is connected to a patient via a catheter, and the present invention is provided with a fluid circuit which demarcates a fluid loop by that cause, and contains dialysing fluid, It is possible to remove Solute which flows in a patient's abdominal cavity, flows through along with the fluid loop, flows out of the abdominal cavity, circulates continuously, and contains moisture with a remedially effective superfluous quantity and a uremic toxin. In proportion to the amount of circulation of fluid in a fluid loop, the amount of supply and the amount of discharge of medical treatment fluid into a fluid loop can be adjusted so that control is possible, and medical treatment fluid can be discharged after passing two or more times along with a fluid loop.[Chosen drawing] Drawing 1