PERITONEAL DIALYSIS SYSTEM
First Claim
1. A dialysate regeneration system for removing contaminants from spent dialysate comprising:
- a) a dialysate circulation flow path including;
i) a pump that pumps spent dialysate through the dialysate circulation flow path;
ii) a first cartridge adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet; and
iii) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet;
b) a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge; and
c) a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge.
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Accused Products
Abstract
A dialysate regeneration system for removing contaminants from spent dialysate according to this invention includes a dialysate circulation flow path including a pump that pumps spent dialysate through the dialysate circulation flow path, a first cartridge adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet, a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the spent dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet. Ancillary to the two cartridges, the dialysate regeneration system further includes a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge, and a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge.
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Citations
24 Claims
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1. A dialysate regeneration system for removing contaminants from spent dialysate comprising:
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a) a dialysate circulation flow path including; i) a pump that pumps spent dialysate through the dialysate circulation flow path; ii) a first cartridge adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet; and iii) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet; b) a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge; and c) a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A dialysate regeneration system for removing contaminants from spent peritoneal dialysate comprising:
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a) a dialysate circulation flow path including; i) a pump that pumps dialysate through the dialysate circulation flow path; ii) a first cartridge including an ultrafiltration membrane and adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet; and iii) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the spent dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet; b) a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage, the first cleaning stage including a mixture of activated carbon and zirconium oxide, to the first cleaning solution inlet of the first cartridge; and c) a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage, the second cleaning stage including immobilized urease and zirconium phosphate, to the second cleaning solution inlet of the second cartridge.
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19. A peritoneal dialysis and dialysate regeneration system comprising:
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a) a dialysate circulation flow path including; i) a first cartridge adapted to remove contaminants from spent dialysate, including a first cleaning solution outlet and a first cleaning solution inlet; ii) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the spent dialysate, and including a second cleaning solution outlet and a second cleaning solution inlet; and iii) a peritoneal dialysis cycler configured to transfer a predetermined quantity of dialysate into a peritoneal cavity of a patient, direct spent dialysate from the peritoneal cavity of the patient into the first cartridge and the second cartridge, and introduce regenerated dialysate into the peritoneal cavity of the patient; b) a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge; and c) a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge.
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20. A peritoneal dialysis system for treating a patient and removing contaminants from spent dialysate comprising:
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a) a dialysate circulation flow path including; i) a patient dialysate outlet from a peritoneal cavity of the patient; ii) a pump that pumps spent dialysate from the patient dialysate outlet through the dialysate circulation flow path; iii) a first cartridge adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet; iv) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the spent dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet; and v) a patient dialysate inlet back to the peritoneal cavity of the patient; b) a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge; and c) a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge.
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21. A method of removing contaminants from spent dialysate comprising:
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a) flowing dialysate through a dialysate circulation flow path including; i) a pump that pumps spent dialysate through the dialysate circulation flow path; ii) a first cartridge adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet; and iii) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the spent dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet; b) flowing first cleaning solution through a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge; and c) flowing second cleaning solution through a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge. - View Dependent Claims (22)
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23. A method of peritoneal dialysis and regenerating spent dialysate comprising:
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a) flowing dialysate through a dialysate circulation flow path including; i) a first cartridge adapted to remove contaminants from spent dialysate, including a first cleaning solution outlet and a first cleaning solution inlet; ii) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the spent dialysate, and including a second cleaning solution outlet and a second cleaning solution inlet; and iii) a peritoneal dialysis cycler configured to transfer a predetermined quantity of dialysate into a peritoneal cavity of a patient, direct spent dialysate from the peritoneal cavity of the patient into the first cartridge and the second cartridge, and introduce regenerated dialysate into the peritoneal cavity of the patient; b) flowing first cleaning solution through a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge; and c) flowing second cleaning solution through a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge.
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24. A method of treating a patient and removing contaminants from spent dialysate comprising:
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a) flowing dialysate through a dialysate circulation flow path including; i) a patient dialysate outlet from a peritoneal cavity of the patient; ii) a pump that pumps spent dialysate from the patient dialysate outlet through the dialysate circulation flow path; iii) a first cartridge adapted to remove contaminants from the spent dialysate, including a first cleaning solution inlet and a first cleaning solution outlet; iv) a second cartridge adapted to remove urea from the spent dialysate, the second cartridge including semi-permeable hollow fibers adapted for transport of urea across the walls of the semi-permeable hollow fibers and adapted to retain at least calcium, magnesium, and sodium ions in the dialysate, and including a second cleaning solution inlet and a second cleaning solution outlet; and v) a patient dialysate inlet back to the peritoneal cavity of the patient; b) flowing first cleaning solution through a first dialysate cleaning flow path including a pump that pumps first cleaning solution from the first cleaning solution outlet of the first cartridge through a first cleaning stage to the first cleaning solution inlet of the first cartridge; and c) flowing second cleaning solution through a second dialysate cleaning flow path including a pump that pumps second cleaning solution from the second cleaning solution outlet of the second cartridge through a second cleaning stage to the second cleaning solution inlet of the second cartridge.
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Specification