Septumless implantable treatment material device
First Claim
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1. An implantable access device comprising:
- A. a biocompatible housing having at least one entry port and at least one aperture with a passageway extending therebetween, said entry port being adapted to receive a filament for passage into said passageway, said housing further including and disposed in said passageway a valve assembly comprising a valve and a sealing element, said valve assembly adapted to be activated by said filament after passage of said filament through said entry port whereupon a seal, independent of activation of said valve, is created by said sealing element about said filament before said valve opens to allow access through said passageway, said aperture communicating with an internal substantially cylindrical reservoir in the housing, said reservoir being defined by a lateral surface extending about a central axis and a bottom surface;
B. an outlet extending through said housing along an outlet channel axis from a point on said lateral surface of said reservoir, andC. a filter assembly disposed in said reservoir, said filter assembly including a substantially cylindrical fluid permeable first wall interior to and spaced apart from said lateral surface of said reservoir, said first wall establishing a first annular chamber between said first wall and said lateral surface and a first reservoir chamber interior to said first wall, said first annular chamber and said first reservoir chamber being in fluid communication only through said first wall, and said outlet being in direct fluid communication with said first annular chamber.
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Abstract
A septumless implantable access device suitable for delivering a liquid medication to a site remote from the site of port implantation is disclosed, which contains a filter assembly for removing particulate material from fluid injected into the port. The filter assembly of the invention contains a first reservoir chamber having cutouts, recesses, and/or sharp corners in which particulate material may be trapped, and additionally having a first wall forming a filter barrier capable of 360° of fluid flow therethrough. The implantable access device may also include an infusion pump apparatus coupled to the access device.
152 Citations
18 Claims
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1. An implantable access device comprising:
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A. a biocompatible housing having at least one entry port and at least one aperture with a passageway extending therebetween, said entry port being adapted to receive a filament for passage into said passageway, said housing further including and disposed in said passageway a valve assembly comprising a valve and a sealing element, said valve assembly adapted to be activated by said filament after passage of said filament through said entry port whereupon a seal, independent of activation of said valve, is created by said sealing element about said filament before said valve opens to allow access through said passageway, said aperture communicating with an internal substantially cylindrical reservoir in the housing, said reservoir being defined by a lateral surface extending about a central axis and a bottom surface; B. an outlet extending through said housing along an outlet channel axis from a point on said lateral surface of said reservoir, and C. a filter assembly disposed in said reservoir, said filter assembly including a substantially cylindrical fluid permeable first wall interior to and spaced apart from said lateral surface of said reservoir, said first wall establishing a first annular chamber between said first wall and said lateral surface and a first reservoir chamber interior to said first wall, said first annular chamber and said first reservoir chamber being in fluid communication only through said first wall, and said outlet being in direct fluid communication with said first annular chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification