DAVID JUYUP LEE, D.O.
Osteopathic Medicine at Vanowen St, Van Nuys, CA

2007017, Aug 2, 2007

Jan 30, 2007

11/700690

Martin Roberts - North Hills CA, US
David B.N. Lee - Encino CA, US

A61M 1/00

604 29

A peritoneal-based (“bloodless”) artificial kidney processes peritoneal fluid without need for additional fluids (“waterless”). Fluid is separated into a protein-rich stream and a protein-free stream. The protein-rich stream is regenerated using a sorbent assembly, and its protein composition can be modified by removal of selected protein(s) (“dialysate-pheresis”). It is then reconstituted with additives and returned into the peritoneal cavity, thereby reducing protein-loss and providing oncotic-pressure for ultrafiltration. The protein-free stream is used to produce free water, and an alkaline or acid fluid for optimization of the composition of the regenerated stream. The unused protein-free stream can be used to “reverse flush” the separator to maintain its patency and the excess discarded for fluid-balance regulation. Compared to prior art, immobilization of urease allows more protein rich fluid to be regenerated and re-circulated into the peritoneal cavity for toxin removal and allows practicable development of portable and wearable artificial kidneys.

2010021, Aug 26, 2010

May 4, 2010

12/773227

Martin Roberts - North Hills CA, US
David B.N. Lee - Encino CA, US

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA

A61M 1/28

604 29

A peritoneal-based (“bloodless”) artificial kidney processes peritoneal fluid without need for additional fluids (“waterless”). Fluid is separated into a protein-rich stream and a protein-free stream. The protein-rich stream is regenerated using a sorbent assembly, and its protein composition can be modified by removal of selected protein(s) (“dialysate-pheresis”). It is then reconstituted with additives and returned into the peritoneal cavity, thereby reducing protein-loss and providing oncotic-pressure for ultrafiltration. The protein-free stream is used to produce free water, and an alkaline or acid fluid for optimization of the composition of the regenerated stream. The unused protein-free stream can be used to “reverse flush” the separator to maintain its patency and the excess discarded for fluid-balance regulation. Compared to prior art, immobilization of urease allows more protein rich fluid to be regenerated and re-circulated into the peritoneal cavity for toxin removal and allows practicable development of portable and wearable artificial kidneys.

5944684, Aug 31, 1999

Jun 2, 1997

8/866972

Martin Roberts - North Hills CA
David Be-Nyi Lee - Encino CA

The Regents of the University of California - Oakland CA

A61M 3700

604 5

A wearable peritoneal dialysis device providing continuous removal of waste metabolites from the blood using a small volume (250-1000 mls) of protein-containing dialysate having an overall flow rate of about 2-3 liters per hour. The device may be worn in several places on the torso and limbs. Included are methods for peritoneal dialysis having improved efficiency, as well as methods for providing hormones, nutrients or therapeutic agents to a patient.