Patent ID: 8715221

Claim:
A wearable peritoneal dialysis system for a patient comprising: a volume of peritoneal dialysis solution that is infused into and moved out of the patient's peritoneal cavity, thereby removing from the patient uremic waste metabolites that have diffused into the peritoneal dialysis solution; a closed fluid system loop for circulating the peritoneal dialysis solution from the patient, throughout the system and back into the patient; at least one pump for infusing the peritoneal dialysis solution into the patient's peritoneal cavity and moving the peritoneal dialysis solution containing uremic waste metabolites out of the patient's peritoneal cavity and into the fluid system loop; and a replaceable cartridge in the fluid system loop for receiving the peritoneal dialysis solution containing uremic waste metabolites from the patient's peritoneal cavity and for regenerating the peritoneal dialysis solution, said replaceable cartridge having an urea removal layer that includes an ion-selective element comprised of hollow fibers coated with an ion-selective material that prevents calcium from being removed from the peritoneal dialysis solution, the peritoneal dialysis solution flowing through the hollow fibers in the closed fluid system loop.