Dialysis systems and methods including cassette with fluid heating and air removal
First Claim
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1. A dialysis fluid system comprising:
- a dialysis instrument including a pump actuator and a fluid heater; and
a dialysis fluid cassette including a rigid portion and a flexible sheet cooperating to form a pumping section for operation with the pump actuator, the dialysis fluid cassette further including a heating section for operation with the fluid heater, the heating section includinga dialysis fluid inlet,a dialysis fluid outlet, anda dialysis fluid heating area located between the fluid inlet and the fluid outlet, andan air vent opening located above the fluid outlet when the dialysis fluid cassette is loaded into the dialysis instrument.
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Abstract
A dialysis fluid system includes an instrument including a pump actuator and a fluid heater, and a dialysis fluid cassette. The dialysis fluid cassette includes a rigid portion defining a pumping section for operation with the pump actuator and a heating section for operation with the fluid heater. The heating section includes a dialysis fluid inlet, a dialysis fluid outlet, and a dialysis fluid heating area located between the fluid inlet and the fluid outlet, the heating section further includes an air separation chamber for collecting air separated from the dialysis fluid.
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Citations
22 Claims
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1. A dialysis fluid system comprising:
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a dialysis instrument including a pump actuator and a fluid heater; and a dialysis fluid cassette including a rigid portion and a flexible sheet cooperating to form a pumping section for operation with the pump actuator, the dialysis fluid cassette further including a heating section for operation with the fluid heater, the heating section including a dialysis fluid inlet, a dialysis fluid outlet, and a dialysis fluid heating area located between the fluid inlet and the fluid outlet, and an air vent opening located above the fluid outlet when the dialysis fluid cassette is loaded into the dialysis instrument. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A dialysis fluid system comprising:
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a dialysis instrument including a pump actuator and a fluid heater; and a dialysis fluid cassette including a rigid portion and a flexible sheet cooperating to form a pumping section for operation with the pump actuator, the dialysis fluid cassette further including a heating section for operation with the fluid heater, the heating section including a dialysis fluid inlet, a dialysis fluid outlet, and a dialysis fluid heating area located between the fluid inlet and the fluid outlet, the heating section further including an air separation chamber for collecting air separated from the dialysis fluid. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A dialysis fluid heating method comprising:
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flexing a sheet of a dialysis fluid cassette to pump a dialysis fluid through a dialysis fluid air separation chamber of the dialysis fluid cassette; using buoyancy forces to remove air from the dialysis fluid pumped through the air separation chamber; and heating the dialysis fluid pumped through the air separation chamber. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A dialysis fluid system comprising:
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a dialysis instrument including a pump actuator and a fluid heater; and a dialysis fluid cassette including a rigid portion having a pumping section for operation with the pump actuator and a heating section for operation with the fluid heater, the heating section including a dialysis fluid inlet, a dialysis fluid outlet, and a dialysis fluid heating area located between the fluid inlet and the fluid outlet, an air vent opening located above the fluid outlet when the dialysis fluid cassette is loaded into the dialysis instrument, and a plurality of baffles configured to increase heat transfer.
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Specification