Dialysis system with cassette based balance chambers and volumetric pumps
First Claim
1. A dialysis system comprising:
- a fresh dialysis fluid pump;
a used dialysis fluid pump; and
a dialysis fluid cassette including at least one wall that forms a rigid fresh fluid flow path in fluid communication with the fresh dialysis fluid pump and a rigid used fluid flow path in fluid communication with the used dialysis fluid pump, the dialysis fluid cassette carrying a balance chamber, the balance chamber including a first rigid portion, a second rigid portion, and a flexible sheet located between the first and second rigid portions, the flexible sheet dividing the balance chamber into (i) a fresh dialysis fluid compartment connected fluidly to the fresh dialysis fluid pump via the rigid fresh fluid flow path, wherein fresh dialysis fluid contacts the first rigid portion and a first side of the flexible sheet, and (ii) a used dialysis fluid compartment connected fluidly to the used dialysis fluid pump via the rigid used fluid flow path, wherein used dialysis fluid contacts the second rigid portion and a second side of the flexible sheet.
1 Assignment
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Accused Products
Abstract
A dialysis system includes a fresh dialysis fluid pump, a used dialysis fluid pump, a fresh fluid flow path, a used fluid flow path, and a dialysis fluid cassette carrying a balance chamber, the balance chamber including a first rigid portion, a second rigid portion, and a flexible sheet located between the first and second rigid portions, the flexible sheet dividing the balance chamber into (i) a fresh dialysis fluid compartment connected fluidly to the fresh dialysis fluid pump via the fresh fluid flow path, wherein fresh dialysis fluid contacts the first rigid portion and a first side of the flexible sheet, and (ii) a used dialysis fluid compartment connected fluidly to the used dialysis fluid pump via the used fluid flow path, wherein used dialysis fluid contacts the second rigid portion and a second side of the flexible sheet.
225 Citations
20 Claims
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1. A dialysis system comprising:
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a fresh dialysis fluid pump; a used dialysis fluid pump; and a dialysis fluid cassette including at least one wall that forms a rigid fresh fluid flow path in fluid communication with the fresh dialysis fluid pump and a rigid used fluid flow path in fluid communication with the used dialysis fluid pump, the dialysis fluid cassette carrying a balance chamber, the balance chamber including a first rigid portion, a second rigid portion, and a flexible sheet located between the first and second rigid portions, the flexible sheet dividing the balance chamber into (i) a fresh dialysis fluid compartment connected fluidly to the fresh dialysis fluid pump via the rigid fresh fluid flow path, wherein fresh dialysis fluid contacts the first rigid portion and a first side of the flexible sheet, and (ii) a used dialysis fluid compartment connected fluidly to the used dialysis fluid pump via the rigid used fluid flow path, wherein used dialysis fluid contacts the second rigid portion and a second side of the flexible sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A dialysis system comprising:
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a fresh dialysis fluid pump; a used dialysis fluid pump; and a dialysis fluid cassette including at least one wall that forms a first rigid fresh fluid flow path, a first rigid used fluid flow path, a second rigid fresh fluid flow path, and a second rigid used fluid flow a path, the dialysis fluid cassette carrying a first balance chamber including a first rigid portion, a second rigid portion, and a flexible sheet located between the first and second rigid portions, the flexible sheet dividing the first balance chamber into (i) a fresh dialysis fluid compartment connected fluidly to the fresh dialysis fluid pump via the first fresh fluid flow path, wherein fresh dialysis fluid contacts the first rigid portion and a first side of the flexible sheet, and (ii) a used dialysis fluid compartment connected fluidly to the used dialysis fluid pump via the first used fluid flow path, wherein used dialysis fluid contacts the second rigid portion and a second side of the flexible sheet, and a second balance chamber including a first rigid portion and a second rigid portion, and a flexible sheet located between the first and second rigid portions, the flexible sheet dividing the second balance chamber into (i) a fresh dialysis fluid compartment connected fluidly to the fresh dialysis fluid pump via the second fresh fluid flow path, wherein fresh dialysis fluid contacts the first rigid portion and a first side of the flexible sheet, and (ii) a used dialysis fluid compartment connected fluidly to the used dialysis fluid pump via the second used fluid flow path, wherein used dialysis fluid contacts the second rigid portion and a second side of the flexible sheet. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A dialysis system comprising:
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a dialysis fluid cassette including at least one wall that forms a rigid fresh dialysis fluid flow path and a rigid used dialysis fluid flow path, the dialysis fluid cassette carrying a first rigid portion and a second rigid portion defining a chamber with a flexible sheet located between the first rigid portion and the second rigid portion to form a fresh dialysis fluid compartment and a used dialysis fluid compartment; a fresh dialysis fluid membrane pump including a fluid receiving portion in fluid communication with the dialysis fluid cassette; and a used dialysis fluid membrane pump including a fluid receiving portion in fluid communication with the dialysis fluid cassette, wherein the fresh dialysis fluid membrane pump is in fluid communication with the fresh dialysis fluid compartment via the rigid fresh dialysis fluid flow path and the used dialysis fluid membrane pump is in fluid communication with the used dialysis fluid compartment via the rigid used dialysis fluid flow path, the fresh dialysis fluid membrane pump causing fresh dialysis fluid to contact the first rigid portion and a first side of the flexible sheet of the fresh dialysis fluid compartment, the used dialysis fluid membrane pump causing used dialysis fluid to contact the second rigid portion and a second side of the flexible sheet of the used dialysis fluid compartment. - View Dependent Claims (17, 18, 19, 20)
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Specification