Systems and methods for performing peritoneal dialysis
First Claim
1. A system for providing dialysis comprising:
- a patient fluid loop including a first pump and multiple patient lumens;
a second fluid loop including a second pump and a medical fluid regenerator;
a membrane device in fluid contact with and separating the patient fluid loop and the second fluid loop, the membrane device allowing at least one selected component of the fluid in the patient fluid loop to transfer to the second fluid loop;
the second loop being closed except for the transfer of the selected component via the membrane device; and
a controller that operates the first and second pumps to recirculate fluid in the patient loop and the second loop.
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Accused Products
Abstract
In a peritoneal dialysis embodiment of the present invention, spent dialysate from the patient'"'"'s peritoneal cavity passes, along a patient loop, through a dialyzer having a membrane that separates waste components from the spent dialysate, wherein the patient loop returns fresh dialysate to the patient'"'"'s peritoneal cavity. The waste components are carried away in a second regeneration loop to a regeneration unit or sorbent cartridge, which absorbs the waste components. The regeneration unit removes undesirable components in the dialysate that were removed from the patient loop by the dialyzer, for example, excess water (ultrafiltrate or UF), toxins and metabolic wastes. Desirable components can be added to the dialysate by the system, such as glucose and electrolytes. The additives assist in maintaining the proper osmotic gradients in the patient to perform dialysis and provide the necessary compounds to the patient.
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Citations
61 Claims
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1. A system for providing dialysis comprising:
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a patient fluid loop including a first pump and multiple patient lumens;
a second fluid loop including a second pump and a medical fluid regenerator;
a membrane device in fluid contact with and separating the patient fluid loop and the second fluid loop, the membrane device allowing at least one selected component of the fluid in the patient fluid loop to transfer to the second fluid loop;
the second loop being closed except for the transfer of the selected component via the membrane device; and
a controller that operates the first and second pumps to recirculate fluid in the patient loop and the second loop. - 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)
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27. A disposable dialysis cassette comprising:
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a flexible membrane covering a patient pump chamber and a regeneration pump chamber;
means for fluidly connecting the patient pump chamber to a closed loop patient fluid path; and
means for fluidly connecting the regeneration pump chamber to a closed loop regeneration fluid path, wherein the patient path fluidly communicates with the regeneration path via a dialyzer. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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35. A dialysis therapy device for use with a disposable cassette, the device comprising:
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a housing having a portion that receives the disposable cassette;
a patient pump actuator in the housing that pumps fluid through a patient path defined at least in part by the disposable cassette; and
a regeneration pump actuator in the housing that pumps fluid through a regeneration path defined at least in part by the disposable cassette. - View Dependent Claims (36, 37, 38, 39)
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40. A method of moving fluid in a dialysis system comprising the steps of:
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continuously recirculating a first fluid through a patient loop;
continuously recirculating a second fluid through a regeneration loop;
transferring at least one waste component from the patient loop to the regeneration loop through a device shared by both loops, the loops being closed except for said transfer through said device; and
removing the at least one waste component from the regeneration loop. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A method of moving fluid in a peritoneal dialysis system comprising the steps of:
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continuously recirculating dialysate through a container in a patient loop;
continuously recirculating dialysate through the container in a regeneration loop; and
continuously moving at least one waste component from the patient loop to the regeneration loop through the container shared by both loops, the loops being closed except for the transfer through the container. - View Dependent Claims (52)
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53. A method of performing continuous flow peritoneal dialysis comprising the steps of:
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continuously recirculating dialysate fluid through a closed patient loop;
continuously recirculating regeneration fluid through a closed regeneration loop;
passing the dialysate fluid and the regeneration fluid past opposite sides of a dialyzer membrane; and
regenerating the regeneration fluid after the regeneration fluid exits the dialyzer. - View Dependent Claims (54, 55, 56)
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57. A method of performing continuous flow dialysis comprising the steps of:
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performing continuous flow peritoneal dialysis with a closed loop dialysis device at a first point in time; and
performing continuous flow hemodialysis via the same closed loop dialysis device at a second point in time. - View Dependent Claims (58, 59, 60, 61)
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Specification