Dialysis system with balance chamber prime and rinseback
First Claim
1. A dialysis system comprising:
- an extracorporeal circuit including a dialyzer;
a dialysis fluid circuit includinga first balance chamber,a second balance chamber,a fresh dialysis fluid pump in fluid communication with first and second fresh compartments of the first and second balance chambers, respectively, the first and second fresh compartments in fluid communication with a fresh dialysate fluid inlet of the dialyzer, anda spent dialysis fluid pump in fluid communication with first and second spent compartments of the first and second balance chambers, respectively, the spent dialysis fluid pump also in fluid communication with a spent dialysis fluid outlet of the dialyzer; and
wherein the system is configured to run(a) a priming sequence that uses at least one of the fresh and spent dialysis fluid pumps and the first and second balance chambers to pump dialysis fluid (i) through the dialysis fluid circuit and (ii) through the dialyzer and into the extracorporeal circuit, and(b) a bolus sequence in which spent dialysis fluid from the spent compartment of the first balance chamber is sent to the spent compartment of the second balance chamber to drive fresh dialysis fluid to the dialyzer through the fresh dialysis fluid inlet line without a corresponding amount of spent dialysis fluid being driven to a drain.
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Accused Products
Abstract
A dialysis system includes an extracorporeal circuit including a dialyzer; a dialysis fluid circuit including a first balance chamber, a second balance chamber, a fresh dialysis fluid pump in fluid communication with first and second fresh compartments of the first and second balance chambers, respectively, the first and second fresh compartments in fluid communication with a fresh dialysate fluid inlet of the dialyzer, and a spent dialysis fluid pump in fluid communication with first and second spent compartments of the first and second balance chambers, respectively, the spent dialysis fluid pump also in fluid communication with a spent dialysis fluid outlet of the dialyzer; and wherein the system is configured to run a priming sequence that uses (i) at least one of the fresh and spent dialysis fluid pumps and the first and second balance chambers to pump dialysis fluid through the dialysis fluid circuit and (ii) at least one of the fresh and spent dialysis fluid pumps to pump dialysis fluid through the dialyzer and into the extracorporeal circuit.
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Citations
15 Claims
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1. A dialysis system comprising:
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an extracorporeal circuit including a dialyzer; a dialysis fluid circuit including a first balance chamber, a second balance chamber, a fresh dialysis fluid pump in fluid communication with first and second fresh compartments of the first and second balance chambers, respectively, the first and second fresh compartments in fluid communication with a fresh dialysate fluid inlet of the dialyzer, and a spent dialysis fluid pump in fluid communication with first and second spent compartments of the first and second balance chambers, respectively, the spent dialysis fluid pump also in fluid communication with a spent dialysis fluid outlet of the dialyzer; and wherein the system is configured to run (a) a priming sequence that uses at least one of the fresh and spent dialysis fluid pumps and the first and second balance chambers to pump dialysis fluid (i) through the dialysis fluid circuit and (ii) through the dialyzer and into the extracorporeal circuit, and (b) a bolus sequence in which spent dialysis fluid from the spent compartment of the first balance chamber is sent to the spent compartment of the second balance chamber to drive fresh dialysis fluid to the dialyzer through the fresh dialysis fluid inlet line without a corresponding amount of spent dialysis fluid being driven to a drain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A dialysis system comprising:
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an extracorporeal circuit including a dialyzer; a dialysis fluid circuit including a first balance chamber, a second balance chamber, a fresh dialysis fluid pump in fluid communication with first and second fresh compartments of the first and second balance chambers, respectively, the first and second fresh compartments in fluid communication with a fresh dialysate fluid inlet of the dialyzer, and a spent dialysis fluid pump in fluid communication with first and second spent compartments of the first and second balance chambers, respectively, the spent dialysis fluid pump also in fluid communication with a spent dialysis fluid outlet of the dialyzer; and wherein the system is configured to run a bolus sequence in which spent dialysis fluid from the spent compartment of the first balance chamber is sent to the spent compartment of the second balance chamber to drive fresh dialysis fluid to the dialyzer through the fresh dialysis fluid inlet line without a corresponding amount of spent dialysis fluid being driven to a drain.
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Specification