Implantable treatment material device
First Claim
1. An implantable access device comprising:
- A. a biocompatible housing defining an internal open-faced, substantially cylindrical reservoir defined by a lateral surface extending about a central axis and a bottom surface;
B. a biocompatible, self-resealing, penetrable septum affixed to said housing and spanning the open face of said reservoir;
C. an outlet extending through said housing along an outlet channel axis from a point on said lateral surface of said reservoir, andD. 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 and underlying said septum, 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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Accused Products
Abstract
An 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. A filter assembly for insertion into an implantable treatment material device is also described.
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Citations
32 Claims
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1. An implantable access device comprising:
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A. a biocompatible housing defining an internal open-faced, substantially cylindrical reservoir defined by a lateral surface extending about a central axis and a bottom surface; B. a biocompatible, self-resealing, penetrable septum affixed to said housing and spanning the open face of said reservoir; C. an outlet extending through said housing along an outlet channel axis from a point on said lateral surface of said reservoir, and D. 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 and underlying said septum, 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, 19, 20, 21, 22, 23)
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24. A filter assembly for placement within a cylindrical reservoir of an implantable access device, said reservoir being defined by a cylindrical lateral surface having diameter D and extending along a reference axis, and at one end by a bottom surface transverse to said reference axis and at an end opposite said bottom surface by a self-sealing, penetrable septum spanning said reservoir, and having an outlet extending from said lateral surface, comprising:
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i. a substantially cylindrical fluid permeable first wall defining a first reservoir chamber interior thereto and having at least a portion with maximum transverse diameter less than D and ii. means for positioning said first wall within said reservoir whereby an annular chamber is established between said portion and said lateral surface of said reservoir, said chamber being contiguous within said outlet port, wherein the first wall is a mesh screen. - View Dependent Claims (25, 26, 27)
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28. A filter assembly for placement within a cylindrical reservoir of an implantable access device, said reservoir being defined by a cylindrical lateral surface having diameter D and extending along a reference axis, and at one end by a bottom surface transverse to said reference axis and at an end opposite said bottom surface by a self-sealing, penetrable septum spanning said reservoir, and having an outlet extending from said lateral surface, comprising:
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i. a substantially cylindrical fluid permeable first;
wall defining a first reservoir chamber interior thereto and having at least a portion with maximum transverse diameter less than D andii. means for positioning said first wall within said reservoir whereby an annular chamber is established between said portion and said lateral surface of said reservoir, said chamber being contiguous within said outlet port, and further including a substantially cylindrical fluid permeable second wall interior to and spaced apart from said first wall, said second wall establishing within said first reservoir chamber; i. a second annular chamber between said second wall and said first wall; and ii. a first reservoir sub-chamber interior to said second wall;
said sub-chamber being interior to said second wall and said second annular chamber being in fluid communication with said reservoir sub-chamber only through said second wall. - View Dependent Claims (29, 30, 31, 32)
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Specification