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Embolization

  • US 8,012,454 B2
  • Filed: 08/29/2003
  • Issued: 09/06/2011
  • Est. Priority Date: 08/30/2002
  • Status: Active Grant
First Claim
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1. A particle, comprisinga polymeric matrix;

  • anda radiopaque material distributed in the polymeric matrix, wherein;

    the particle has a diameter of from about ten microns to about 3,000 microns,the particle has a center region with pores having a mean size of about 20 microns or more,the particle has a surface region with pores having a mean size of about one micron or less, andthe polymeric matrix comprises a cross-linked polymer.

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