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MULTI-LAYER FILTRATION DEVICE

  • US 20130046330A1
  • Filed: 08/17/2011
  • Published: 02/21/2013
  • Est. Priority Date: 08/17/2011
  • Status: Active Grant
First Claim
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1. A filter device assembly for capturing embolic particles in a body vessel, the device comprising:

  • a structure having a frame with a predetermined shape, and a distal and proximal portion;

    the frame being configured to move between an expanded state for engagement with the body vessel and a collapsed state for delivery and retrieval; and

    at least a first and second filter member, each filter member having a proximal part and a distal part, the proximal part circumferentially attached to the distal portion of the structure;

    the distal part of the first filter member closed such that the first filter member forms a first annulus chamber having porosity P1 and the distal part of the second filter member closed such that the second filter member forms a second annulus chamber having porosity P2;

    wherein the magnitude of the porosity for the first and second filter members follows the relationship P1>

    P2;

    wherein the first and second filter members are configured in the expanded state to allow blood to flow there through and to capture emboli in the annulus chambers.

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