Implantable infusion device
First Claim
1. An implantable patient access device for permitting access to an implanted internal catheter using a needle and enabling the introduciton of a flexible filament such as an external catheter, wire or optical fiber, comprising:
- housing means defining a entrance orifice having a decreasing cross-sectional area and having a surface formed of a hard material for guiding said needle upon contacting said entrance orifice into a guide passageway within said housing means, said housing means further defining an exit orifice for attachment of said internal catheter,an articulating catheter valve within said housing means which normally remains closed to provide resistance to flow of fluids through said valve, yet opens when penetrated by said needle enabling said needle to communicate with said internal catheter wherein said guide passageway guides and orients said needle to strike said catheter valve at a predetermined area, andmounting means formed by said housing means for affixing said housing means subcutaneously.
2 Assignments
0 Petitions
Accused Products
Abstract
In infusion port for implantation within a patient for providing repeated access to specific tissue within a patient and communicating with the tissue by an internal implanted catheter. The infusion port in accordance with this invention includes a housing having a funnel shaped inlet orifice which terminates in a reduced diameter guide passageway. Installed within the housing is an articulating catheter valve such as a leaflet valve assembly. The housing communicates with an exit passageway which is attached to an internal outflow catheter coupling the infusion port to a specific tissue within the patient. In use, a needle is used to penetrate the patient'"'"'s skin and contacts the entrance orifice of the infusion port. The entrance orifice guides the needle point into alignment with and into the guide passageway. The guide passageway targets a small portion of the articulating catheter valve which can be in the form of a leaflet valve assembly. Once through the catheter valve, fluids may be infused into the patient through the needle or withdrawn from the patient. Alternatively, an external catheter or other filament can be placed in communication with the outflow catheter by feeding it in into the infusion port and into the implanted catheter after being introduced over a needle which is restricted from entering the implanted catheter.
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Citations
37 Claims
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1. An implantable patient access device for permitting access to an implanted internal catheter using a needle and enabling the introduciton of a flexible filament such as an external catheter, wire or optical fiber, comprising:
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housing means defining a entrance orifice having a decreasing cross-sectional area and having a surface formed of a hard material for guiding said needle upon contacting said entrance orifice into a guide passageway within said housing means, said housing means further defining an exit orifice for attachment of said internal catheter, an articulating catheter valve within said housing means which normally remains closed to provide resistance to flow of fluids through said valve, yet opens when penetrated by said needle enabling said needle to communicate with said internal catheter wherein said guide passageway guides and orients said needle to strike said catheter valve at a predetermined area, and mounting means formed by said housing means for affixing said housing means subcutaneously. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An implantable patient access device for communicating to a desired tissue site within the patient through an implanted internal catheter and accessible using a needle for enabling the introduction of a flexible filament such as an external catheter, wire or optical fiber, comprising:
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a housing defining a entrance orifice having a decreasing cross-sectional area and having a surface formed of a hard material for guiding said needle upon contacting said entrance orifice into a straight guide passageway within said housing, and defining an internal cavity communicating with said guide passageway and an exit orifice, a leaflet valve assembly positioned within said internal cavity and including at least two elastic disc elements stacked together, each of said disc elements having slits formed therethrough and defining a plurality of deflectable valve leaves, said disc elements stacked together such that said slits in each of said disc elements are not aligned with said slits of the adjacent of said disc elements, and mounting means formed by said housing for affixing said housing subcutaneously. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An implantable patient access device for infusion or withdrawal of a fluid through an implanted internal catheter communicating said device with a preselected site within the patient and accessible using a needle, comprising:
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housing means defining a entrance orifice having a decreasing cross-sectional area for guiding said needle into a guide passageway within said housing means, said housing means further defining an exit orifice for attachment of said internal catheter and an internal cavity, and a leaflet valve having at least two elastic disc elements stacked together within said housing internal cavity which normally remains closed to provide resistance to flow of fluids through said valve, yet opens when penetrated by said needle enabling said needle to communicate with said internal catheter wherein said guide passageway guides and orients said needle to strike said leaflet valve at a predetermined area, said internal cavity providing clearance for said valve leaves to deflect toward said exit orifice.
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29. An implantable patient access device for infusion or withdrawal of a fluid through an implanted internal catheter communicating said device with a preselected site within the patient and accessible using a needle, comprising:
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housing means defining a entrance orifice having a decreasing cross-sectional area for guiding said needle into a guide passageway within said housing means, said housing means further defining an exit orifice for attachment of said internal catheter and an internal cavity, and a leaflet valve having at least two elastic disc elements stacked together within said housing internal cavity which normally remains closed to provide resistance to flow of fluids through said valve, yet opens when penetrated by said needle enabling said needle to communicate with said internal catheter wherein said guide passgeway guides and orients said needle to strike said leaflet valve at a predetermined area and wherein said internal cavity providing clearance for said valve leaves to deflect toward said entrance orifice.
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30. An implantable patient access device for infusion for withdrawal of a fluid through an implanted internal catheter communicating said device with a preselected site within the patient and accessible using a needle, comprising:
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housing means defining a entrance orifice having a decreasing cross-sectional area for guiding said needle into a guide passageway within said housing, said housing means further defining an exit orifice for attachment of said internal catheter, said housing defining means to limit the amount of penetration of said needle in said housing while allowing more flexible filaments or catheters to be threaded entirely through said infusion device, and an articulating catheter valve within said housing means which normally remains closed to provide resistance to flow of fluids through said valve, yet opens when penetrated by said needle enabling said needle to communicate with said internal catheter wherein said guide passageway guides and orients said needle to strike said catheter valve at a predetermined area. - View Dependent Claims (31)
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32. An implantable patient access device communicating to a desired tissue site within the patient by an implanted internal catheter and accessible using a needle for enabling the infusion or withdrawal of fluid through the needle or through an introduced external catheter, comprising:
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a housing defining a entrance orifice having a decreasing cross-sectional area for guiding said needle into a straight guide passageway within said housing, and defining an internal cavity communicating with said guide passageway and an exit orifice, and a leaflet valve assembly positioned within said internal cavity and including at least two elastic disc elements stacked together, each of said disc elements having slits formed therethrough each defining a plurality of deflectable valve leaves, said disc elements stacked together such that said slits in each disc are not aligned with said slits of the adjacent of said discs and said housing internal cavity providing clearance for said valve leaves to deflect toward said exit orifice.
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33. An implantable patient access device communicating to a desired tissue site within the patient by an implanted internal catheter and accessibly using a needle for enabling the infusion or withdrawal of fluid through the needle or through an introduced external catheter, comprising:
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a housing defining a entrance orifice having a decreasing cross-sectional area for guiding said needle into a straight guide passageway within said housing, sand defining an internal cavity communicating with said guide passageway and an exit orifice, and a leaflet valve assembly positioned within said internal cavity and including at least two elastic disc elements stacked together, each of said disc elements having slits formed therethrough each defining a plurality of deflectable valve leaves, said disc elements stacked together such that said slits in each disc are not aligned with said slits of the adjacent of said discs, said housing assembly internal cavity providing clearance for said valve leaves to deflect toward said entrance orifice.
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34. An implantable patient access device communicating to a desired tissue site within the patient by an implanted internal catheter and accessible using a needle for enabling the infusion or withdrawal of fluid through the needle or through an introduced external catheter, comprising:
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a housing defining a entrance orifice having a decreasing cross-sectional area for guiding said needle into a straight guide passageway within said housing, and defining an internal cavity communicating with said guide passageway and an exit orifice, said housing defining means to limit the amount of penetration of said needle in said housing while allowing more flexible introduced filaments or catheters to be threaded entirely through said device, and a leaflet valve assembly positioned within said internal cavity and including at least two elastic disc elements stacked together, each of said disc elements stacked together such that said slits in each disc are not aligned with said slits of the adjacent of said discs. - View Dependent Claims (35, 36)
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37. An implantable patient access device for permitting access to an implanted internal catheter using a needle and enabling the introduction of a flexible filament such as an external catheter, wire or optical fiber comprising:
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housing means defining a entrance orifice having a decreasing cross-sectional area and having a surface formed of a hard material for guiding said needle upon contacting said entrance orifice toward a guide passageway within said housing, said housing means further defining an exit orifice for connection to said internal catheter, an articulating catheter valve within said housing means which normally remains closed to provide resistance to flow of fluids through said valve, yet opens for engagement with said filament enabling said filament to communicate with said internal catheter, and mounting means formed by said housing means for affixing said housing subcutaneously.
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Specification