Patent ID: 8187250

Claim:
A method of processing a substantially blood-free fluid derived from a peritoneal cavity of a person, comprising: separating the substantially blood-free fluid into a relatively protein-rich fluid and a relatively protein-free fluid such that a stream of the relatively protein-rich fluid averages at least 15% (by vol) of a stream of the substantially blood-free fluid over at least some period of time; processing the relatively protein-rich fluid with a sorbent having an at least substantially immobilized urease to produce a purified regenerated fluid, wherein the urease is immobilized with greater than Van der Waals forces; depositing at least some of the purified regenerated fluid back into the peritoneal cavity; and wherein at least 80% of the substantially blood-free fluid is re-circulated into the peritoneal cavity as the purified regenerated fluid over a period of 8 hours.