Wearable kidney
First Claim
1. 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.
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Accused Products
Abstract
The present invention relates to a wearable peritoneal dialysis system and a replaceable cartridge in the wearable peritoneal dialysis system that regenerates the peritoneal dialysis solution without removing essential ions from the solution and, consequently, the patient. The invention also relates to methods of removing uremic waste metabolites from a patient using the wearable peritoneal dialysis system. A source of one or more enzymes that degrades uremic waste metabolites can be administered orally in conjunction with use of the wearable peritoneal dialysis system such that the load of toxins needing to be eliminated by the wearable peritoneal dialysis system is reduced. The wearable peritoneal dialysis system is meant to operate continuously or semi-continuously, its components small and light enough that it can be comfortably worn by a patient constantly, without burden.
51 Citations
38 Claims
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1. A wearable peritoneal dialysis system for a patient comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. In a wearable peritoneal dialysis system for a patient having
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, and 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, the improvement comprising 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.
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34. A replaceable cartridge for regenerating peritoneal dialysis solution comprising:
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a purification layer for removing heavy metals, oxidants and other uremic waste metabolites from said peritoneal dialysis solution; a 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; and an ion-exchange layer for removing phosphate and sulfate from said peritoneal dialysis solution. - View Dependent Claims (35)
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36. A method for the removal of uremic waste metabolites from a patient using a wearable peritoneal dialysis system comprising:
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providing a volume of peritoneal dialysis solution; pumping the peritoneal dialysis solution into the peritoneal cavity of the patient through an access port, allowing the patient'"'"'s uremic waste metabolites to diffuse across the peritoneal membrane into the peritoneal dialysis solution; pumping the peritoneal dialysis solution containing uremic waste metabolites out of the patient and into the system; regenerating the peritoneal dialysis solution containing uremic waste metabolites using a 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; and returning the regenerated peritoneal dialysis solution to the patient'"'"'s peritoneal cavity. - View Dependent Claims (37)
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38. A wearable peritoneal dialysis system for a dialysis patient comprising:
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a dialysis solution loop for circulating a peritoneal dialysis solution into the peritoneal cavity of the patient and from the patient'"'"'s peritoneal cavity through the system and back into the patient; a replaceable cartridge in the dialysis solution 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 reduces calcium removal from the peritoneal dialysis solution in the replaceable cartridge, the peritoneal dialysis solution flowing through the hollow fibers in the dialysis solution loop; and at least one pump for infusing regenerated peritoneal dialysis solution into the patient'"'"'s peritoneal cavity and removing the peritoneal dialysis solution containing uremic waste metabolites from the patient'"'"'s peritoneal cavity and circulating it through the replaceable cartridge and back to the patient'"'"'s peritoneal cavity.
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Specification