DIALYSIS SYSTEMS AND METHODS INCLUDING CASSETTE WITH AIR REMOVAL
First Claim
1. A dialysis fluid cassette comprising:
- a rigid portion defining at least one valve chamber and a dialysis fluid pathway, the rigid portion including;
a plurality of walls,a dialysis fluid inlet,a dialysis fluid outlet, anda separation wall extending from a first one of the plurality of walls to a second one of the plurality of walls, the separation wall having a free edge, the separation wall and the plurality of walls constructed and arranged so as to force dialysis fluid to flow from the dialysis fluid inlet around the free edge of the separation wall to the dialysis fluid outlet and to allow a cross-sectional area of the dialysis fluid pathway defined in part by the separation wall to increase as the dialysis fluid flows along the separation wall, to slow the flow of the dialysis fluid, allowing buoyancy forces to remove air from the dialysis fluid.
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Accused Products
Abstract
In an embodiment, a dialysis fluid cassette is disclosed. The cassette includes a plurality of walls defining at least one valve chamber, a dialysis fluid inlet, a dialysis fluid outlet and a dialysis fluid pathway. The cassette further includes a baffle extending from a first one of the walls to an opposing second one of the walls. The baffle includes an end fixed to a third one of the plurality of walls and a free end. The fixed end separates the dialysis fluid inlet from the dialysis fluid outlet and the baffle and the plurality of walls are constructed and arranged such that the flow of dialysis fluid along the pathway defined in part by the baffle slows as the flow approaches the free end of the baffle.
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Citations
15 Claims
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1. A dialysis fluid cassette comprising:
a rigid portion defining at least one valve chamber and a dialysis fluid pathway, the rigid portion including; a plurality of walls, a dialysis fluid inlet, a dialysis fluid outlet, and a separation wall extending from a first one of the plurality of walls to a second one of the plurality of walls, the separation wall having a free edge, the separation wall and the plurality of walls constructed and arranged so as to force dialysis fluid to flow from the dialysis fluid inlet around the free edge of the separation wall to the dialysis fluid outlet and to allow a cross-sectional area of the dialysis fluid pathway defined in part by the separation wall to increase as the dialysis fluid flows along the separation wall, to slow the flow of the dialysis fluid, allowing buoyancy forces to remove air from the dialysis fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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12. A dialysis fluid cassette comprising:
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a plurality of walls defining at least one valve chamber, a dialysis fluid inlet, a dialysis fluid outlet and a dialysis fluid pathway; and a baffle extending from a first one of the walls to an opposing second one of the walls, the baffle including an end fixed to a third one of the plurality of walls and a free end, the fixed end separating the dialysis fluid inlet from the dialysis fluid outlet, the baffle and the plurality of walls constructed and arranged such that the flow of dialysis fluid along the pathway defined in part by the baffle slows as the flow approaches the free end of the baffle.
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13. A dialysis fluid cassette air separation method comprising:
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providing a plurality of walls defining a dialysis fluid inlet, a dialysis fluid outlet and a dialysis fluid pathway; providing a baffle extending from a first one of the walls to an opposing second one of the walls, the baffle including an end fixed to a third one of the plurality of walls and a free end; and flowing dialysis fluid along the dialysis fluid pathway past a free end of the baffle such that the flow of dialysis fluid along the pathway defined in part by the baffle slows as the flow approaches the free end of the baffle. - View Dependent Claims (11, 14, 15)
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Specification