PERSONAL HEMODIALYSIS SYSTEM
First Claim
10. A dialysis machine comprising:
- a dialysis instrument having a pump actuator and first and second valve actuators; and
a disposable cassette operable with the dialysis instrument, the disposable cassette including a pump portion operable with the pump actuator, first and second valve chambers operable with the first and second valve actuators, the first and second valve chambers communicating fluidly with each other, at least the first valve chamber communicating fluidly with a compliance chamber, the compliance chamber negating a first backpressure due to a pneumatic closing pressure used to close the first valve chamber to help to ensure the pneumatic pressure applied to the first valve chamber will close the first valve chamber against a second backpressure from an existing closure of the second valve chamber.
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0 Petitions
Accused Products
Abstract
A dialysis machine includes a dialysis instrument having a pump actuator and first and second valve actuators, and a disposable cassette operable with the dialysis instrument, the disposable cassette including a pump portion operable with the pump actuator, first and second valve chambers operable with the first and second valve actuators, the first and second valve chambers communicating fluidly with each other, at least the first valve chamber communicating fluidly with a compliance chamber, the compliance chamber negating a first backpressure due to a pneumatic closing pressure used to close the first valve chamber to help to ensure the pneumatic pressure applied to the first valve chamber will close the first valve chamber against a second backpressure from an existing closure of the second valve chamber.
286 Citations
28 Claims
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10. A dialysis machine comprising:
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a dialysis instrument having a pump actuator and first and second valve actuators; and a disposable cassette operable with the dialysis instrument, the disposable cassette including a pump portion operable with the pump actuator, first and second valve chambers operable with the first and second valve actuators, the first and second valve chambers communicating fluidly with each other, at least the first valve chamber communicating fluidly with a compliance chamber, the compliance chamber negating a first backpressure due to a pneumatic closing pressure used to close the first valve chamber to help to ensure the pneumatic pressure applied to the first valve chamber will close the first valve chamber against a second backpressure from an existing closure of the second valve chamber. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A dialysis machine comprising:
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a dialysis instrument having a pump actuator and first and second valve actuators; and a disposable cassette operable with the dialysis instrument, the disposable cassette including a pump portion operable with the pump actuator, first and second valve chambers operable with the first and second valve actuators, and a compliance chamber in fluid communication with the first and second valve chambers, the compliance chamber defined at least in part by a rigid wall of the cassette and a diaphragm located on an opposing side of the rigid wall from the first and second valve chamber. - View Dependent Claims (17, 18, 19, 20)
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21. A dialysis machine comprising:
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a dialysis instrument having a pump actuator and first and second valve actuators; and a disposable cassette operable with the dialysis instrument, the disposable cassette including a pump portion operable with the pump actuator, first and second valve chambers operable with the first and second valve actuators, and a compliance chamber in fluid communication with the first and second valve chambers, the compliance chamber defined by in part by a flexible membrane used to close at least one of the first and second valve chambers, the valve chambers each defining an aperture for fluid communication with the compliance chamber. - View Dependent Claims (22, 23, 24)
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25. A hemodialysis machine comprising:
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a blood circuit; a dialysate circuit; a dialyzer placed in communication with the blood circuit and the dialysate circuit; and a priming sequence in which dialysate is used to prime a first portion of the dialysate circuit and a physiologically compatible solution, other than dialysate, is used to prime a second portion of the dialysate circuit the dialyzer and the blood circuit. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 8, 9, 26, 27, 28)
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28-1. The hemodialysis machine of claim 25, which includes a volumetric balancing unit separating the first and second portions of the dialysate circuit.
Specification