Implantable infusion device
First Claim
1. An implantable infusion port for allowing the introduction of a flexible filament such as a catheter wire or optical fiber into a patient and being accessed using a needle which penetrates the patient'"'"'s skin with said filament being introduced into the port by said needle, comprising:
- housing means defining an enlarged generally funnel shaped entrance orifice, with the surface of said entrance orifice formed of a hard material to guide said needle contacting said orifice to a focus area,mounting means for fastening said port subcutaneously, an entrance passageway formed by said housing means extending from said focus area to a valve chamber and to an exit passageway communicating with a site within the patient,valve means within said valve chamber for permitting said filament to pass through said valve means while restricting the flow of fluids across said valve means when said filament is removed, andstop means within said entrance passageway between said focus area and said valve chamber for restricting the passage of said needle while permitting said flexible filament to pass through said entrance passageway and engage said valve means.
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0 Petitions
Accused Products
Abstract
An infusion port designed for the introduction of a catheter for fluid infusion or removal or other flexible filaments within a patient. The infusion port is buried subcutaneously and accessed using a needle which introduces the filament. The infusion port has means to prevent the introducing needle from being inserted past a certain point within the port whereas the introduced flexible element can be inserted beyond that point and is caused to be forced through an articulating valve. The valve of this disclosure features enhancements in its sealing ability and in some embodiments provides a differing level of frictional engagement with the filament upon insertion versus withdrawal. The infusion port of this invention also has design features which provide a relatively small distance between the surface of the skin and the position of the articulating catheter valve through which the introduced filament passes.
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Citations
39 Claims
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1. An implantable infusion port for allowing the introduction of a flexible filament such as a catheter wire or optical fiber into a patient and being accessed using a needle which penetrates the patient'"'"'s skin with said filament being introduced into the port by said needle, comprising:
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housing means defining an enlarged generally funnel shaped entrance orifice, with the surface of said entrance orifice formed of a hard material to guide said needle contacting said orifice to a focus area, mounting means for fastening said port subcutaneously, an entrance passageway formed by said housing means extending from said focus area to a valve chamber and to an exit passageway communicating with a site within the patient, valve means within said valve chamber for permitting said filament to pass through said valve means while restricting the flow of fluids across said valve means when said filament is removed, and stop means within said entrance passageway between said focus area and said valve chamber for restricting the passage of said needle while permitting said flexible filament to pass through said entrance passageway and engage said valve means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An implantable infusion port for allowing the introduction of a flexible filament such as a catheter wire or optical fiber into a patient and being accessed using a needle which penetrates the patient'"'"'s skin with said filament being introduced into the port by said needle, comprising:
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a housing having a generally funnel shaped entrance orifice having a focus area and defining a surface having a first included cone angle around the outer perimeter of said entrance orifice and defining a second included cone angle adjacent said focus area smaller than said first included cone angle, said surface of said entrance orifice being formed of a hard material enabling said needle upon contacting said entrance orifice to be guided toward said focus area, and means for mounting said port subcutaneously. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An implantable infusion port for allowing the introduction of a flexible filament such as a catheter wire or optical fiber into a patient and being accessed using a needle which penetrates the patient'"'"'s skin with said filament being introduced into the port by said needle, comprising:
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a housing defining a generally funnel shaped entrance orifice leading to a focus area, an entrance passageway formed by said housing extending from said focus area to a valve chamber and to an exit passageway communicating with a preselected site within the patient, a valve installed within said valve chamber for permitting the passage of said filament while resisting the flow of fluids across said valve when said filament is removed from said port, and said valve having at least two leaflet valve elements each having three or more leaves, with at least one ring valve element stacked against one of said leaflet valve elements. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An implantable infusion port for allowing the introduction of a flexible filament such as a catheter, wire or optical fiber into a patient and being accessed using a needle which penetrates the patient'"'"'s skin with said filament being introduced into the port by said needle, comprising:
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a housing having an entrance orifice for receiving said filament, and valve means for permitting said filament to pass through said housing but restricting the flow of fluids across said valve means when said filament is removed from said port, said valve means further for imposing greater friction on said filament upon removal of said filament from said port as compared with insertion of said filament. - View Dependent Claims (38)
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39. An implantable infusion port for allowing the introduction of a flexible filament such as a catheter wire or optical fiber into a patient and being accessed using a needle which penetrates the patient'"'"'s skin with said filament being introduced into the port by said needle, comprising:
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housing means defining an enlarged generally funnel shaped entrance orifice defining a central axis which intersects with a narrowed down focus area of said orifice, valve means within said housing for permitting said filament to pass through said valve means while restricting the flow of fluids across said valve means when said filament is removed, and mounting means for mounting said port subcutaneously, said mounting means defining a mounting plane, and wherein said entrance orifice central axis forms an acute angle with respect to said mounting plane for facilitating access to said port by said needle.
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Specification