Medical fluid cassettes and related systems and methods
First Claim
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1. A medical fluid pumping system, comprising:
- a medical fluid pumping machine defining a cassette enclosure, the medical fluid pumping machine comprising a movable piston; and
a medical fluid cassette configured to be disposed within the cassette enclosure of the medical fluid pumping machine, the medical fluid cassette comprisinga base;
a membrane attached to the base, the membrane and a region of the base cooperating to define a fluid pump chamber, the cassette positionable within the cassette enclosure of the medical fluid pumping machine so that the membrane faces the piston and the membrane can be moved by the piston to decrease a volume of the fluid pump chamber; and
a member disposed within the fluid pump chamber and configured to apply an outward force to an inner surface of the membrane to increase the volume of the fluid pump chamber, the member comprising a first portion defining a recess configured to receive the piston.
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Abstract
A medical fluid delivery cassette configured for use with a medical fluid pumping system and related systems and methods. The medical fluid delivery cassette includes a base and a membrane that together define a fluid pump chamber. The medical fluid delivery cassette further includes a member configured to apply an outward force to an inner surface of the membrane.
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Citations
42 Claims
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1. A medical fluid pumping system, comprising:
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a medical fluid pumping machine defining a cassette enclosure, the medical fluid pumping machine comprising a movable piston; and a medical fluid cassette configured to be disposed within the cassette enclosure of the medical fluid pumping machine, the medical fluid cassette comprising a base; a membrane attached to the base, the membrane and a region of the base cooperating to define a fluid pump chamber, the cassette positionable within the cassette enclosure of the medical fluid pumping machine so that the membrane faces the piston and the membrane can be moved by the piston to decrease a volume of the fluid pump chamber; and a member disposed within the fluid pump chamber and configured to apply an outward force to an inner surface of the membrane to increase the volume of the fluid pump chamber, the member comprising a first portion defining a recess configured to receive the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A medical fluid cassette, comprising:
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a base; a membrane attached to the base, the membrane and a region of the base cooperating to define a fluid pump chamber; and a member disposed within the fluid pump chamber and configured to apply an outward force to an inner surface of the membrane to increase a volume of the fluid pump chamber, the member comprising a first portion defining a recess configured to receive a piston of a medical fluid pumping machine. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification