Safety vent structure for extracorporeal circuit
First Claim
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1. An extracorporeal medical fluid circuit component, comprising:
- a vent assembly comprising;
a micro-porous membrane; and
a vent structure adjacent to the micro-porous membrane, the vent structure comprising;
a first porous layer; and
a second porous layer comprising porous material capable of swelling when moistened,wherein the first porous layer is disposed between the micro-porous membrane and the second porous layer and the first porous layer is less responsive to the presence of moisture than the second porous layer, andwherein the component is capable of being used in an extracorporeal medical fluid circuit.
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Abstract
A vent assembly is described for use in an extracorporeal fluid unit. A vent structure adjacent to a micro-porous membrane forms the assembly. The vent structure is porous, but expands when the vent structure becomes wet, thereby closing off the pores and inhibiting (e.g., preventing) fluid from flowing through the vent structure. The vent structure also protects the membrane from becoming wet, such as from condensation.
52 Citations
24 Claims
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1. An extracorporeal medical fluid circuit component, comprising:
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a vent assembly comprising; a micro-porous membrane; and a vent structure adjacent to the micro-porous membrane, the vent structure comprising; a first porous layer; and a second porous layer comprising porous material capable of swelling when moistened, wherein the first porous layer is disposed between the micro-porous membrane and the second porous layer and the first porous layer is less responsive to the presence of moisture than the second porous layer, and wherein the component is capable of being used in an extracorporeal medical fluid circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A dialysis system, comprising:
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a machine body; a pump on the machine body; a fluid circuitry connected to the pump, wherein the pump is configured to push fluid through the circuitry; a vent assembly in fluid communication with the fluid circuitry, the vent assembly comprising; a micro-porous membrane; and a vent structure adjacent to the micro-porous membrane, the vent structure comprising; a first porous layer; and a second porous layer comprising porous material capable of swelling when moistened, wherein the first porous layer is disposed between the micro-porous membrane and the second porous layer and the first porous layer is less responsive to the presence of moisture than the second porous layer. - View Dependent Claims (24)
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Specification