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Implantable treatment material device

  • US 5,695,490 A
  • Filed: 06/07/1995
  • Issued: 12/09/1997
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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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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