Fluid circuits, systems, and processes for extracorporeal blood processing
First Claim
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1. A fluid circuit for a blood treatment system, comprising;
- a blood filter or dialyzer with a blood circuit and a replacement fluid container with a replacement fluid circuit connected to said blood circuit for diluting blood;
said blood circuit communicating with a blood side of said blood filter or dialyzer and having at least one patient access port connected to said replacement fluid container to define a recirculating path;
a port on a non-blood side of said filter or dialyzer connectable to a source of replacement fluid;
said recirculating path being entirely hermetically isolated from an outside of said fluid circuit except by a flow path through a membrane of said filter or dialyzer from said non-blood side to said blood side such that replacement fluid may be added to said replacement fluid container through said filter or dialyzer membrane and stored therein and a flow through said recirculating path may be established without making any connections or disconnections breaking said hermetic seal.
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Abstract
A sterilized fluid management kit for use in renal replacement therapy isolates a replacement fluid container from touch contamination and provides for sterilization of replacement fluid by filtering using an installed filter that is hermetically connected to the replacement fluid container. A method is described where replacement fluid is automatically generated before treatment.
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Citations
15 Claims
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1. A fluid circuit for a blood treatment system, comprising;
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a blood filter or dialyzer with a blood circuit and a replacement fluid container with a replacement fluid circuit connected to said blood circuit for diluting blood; said blood circuit communicating with a blood side of said blood filter or dialyzer and having at least one patient access port connected to said replacement fluid container to define a recirculating path; a port on a non-blood side of said filter or dialyzer connectable to a source of replacement fluid; said recirculating path being entirely hermetically isolated from an outside of said fluid circuit except by a flow path through a membrane of said filter or dialyzer from said non-blood side to said blood side such that replacement fluid may be added to said replacement fluid container through said filter or dialyzer membrane and stored therein and a flow through said recirculating path may be established without making any connections or disconnections breaking said hermetic seal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A fluid circuit for a blood treatment system, comprising:
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a blood circuit connected to a sterile container by a replacement fluid circuit; a non-blood circuit; a blood filter or dialyzer connecting said blood circuit with said non-blood circuit; said blood filter or dialyzer having a membrane with a blood side and a non-blood side; said membrane blood side being in fluid communication with said blood circuit; said membrane non-blood side being in fluid communication with said non-blood circuit; said blood circuit including venous and arterial lines, each connected to said sterile container by releasable connectors configured for connection to a patient access device; said blood circuit, said non-blood circuit, said non-blood side of said blood filter or dialyzer, and said sterile container being entirely hermetically isolated from an outside of said fluid circuit except by a flow path through a membrane of said filter or dialyzer, permanently connected, and free of releasable connectors such that fluid may be added to an interior of said sterile container only through said membrane, through said venous and arterial lines only after a seal of said releasable connectors is broken; said releasable connectors being pre-connected when said fluid circuit is sterilized so that said sterile container may be filled by pumping fluid through said membrane without a possibility of touch contamination until a disconnection of said releasable connectors is made to connect said releasable connectors to a patient access.
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12. A fluid circuit for a blood treatment system, comprising:
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a blood circuit connected to a sterile container by a replacement fluid Circuit; a non-blood circuit; a blood filter or dialyzer connecting said blood circuit with said non-blood circuit; said blood filter or dialyzer having a membrane with a blood side and a non-blood side; said membrane blood side being in fluid communication with said blood circuit; said membrane non-blood side being in fluid communication with said non-blood circuit; said blood circuit including venous and arterial lines being releasably connected to said sterile container by at least one connector that is configured for connection to a patient access device; said blood circuit, said non-blood circuit, said non-blood side of said blood filter or dialyzer, and said sterile container being entirely hermetically isolated from an outside of said fluid circuit except by a flow path through a membrane of said filter or dialyzer, permanently connected, and free of releasable connectors such that fluid may be added to an interior of said sterile container only through said membrane, through said venous and arterial lines only after a seal of said at least one connector is broken; said at least one connector being pre-connected when said fluid circuit is sterilized so that sterile container may be filled by pumping fluid through said membrane without a possibility of touch contamination until a disconnection of said at least one connector is made to connect said at least one connector to a patient access. - View Dependent Claims (14)
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13. A fluid circuit, comprising:
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a dialyzer with a membrane having blood and dialysate sides separated by a membrane; said dialyzer being connected to a blood circuit on said blood side and a dialysate circuit on said dialysate side; a sterile container being connected to the blood circuit; at least one patient access port of the blood circuit connected to the sterile container to define by a replacement fluid circuit recirculating path, a port on a non-blood side of the dialyzer connectable to a source of dialysate; said recirculating path being entirely hermetically isolated from an outside of the fluid circuit except by a flow path through a membrane of the dialyzer from the non-blood side to the blood side such that dialysate fluid may be added to the sterile container only through said dialyzer membrane and stored therein; wherein a flow through the recirculating path may be established without making any connections or disconnections breaking the hermetic seal. - View Dependent Claims (15)
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Specification