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Close vascularization implant material

  • US 5,741,330 A
  • Filed: 06/07/1995
  • Issued: 04/21/1998
  • Est. Priority Date: 10/31/1990
  • Status: Expired due to Term
First Claim
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1. A method for implanting a device into host tissue comprising the steps of:

  • (a) providing an implantable device;

    (b) surrounding at least a portion of the device with a wall comprising;

    (i) a second zone of semipermeable material which is impermeable to host immune cells; and

    (ii) a first zone of porous material outside of the second zone having a nominal pore size from about 0.6 to about 20 microns which comprises frames of elongated strands of material that are less than 5 microns in all but the longest dimension wherein said frames define apertures which interconnect to form three dimensional cavities which permit substantially all inflammatory cells migrating into the cavities to maintain a rounded morphology and wherein the first zone promotes vascularization adjacent but not substantially into the first zone upon implantation into the host tissue; and

    (c) embedding the wall within host tissue.

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