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Vascular filter

  • US 6,443,972 B1
  • Filed: 07/10/2000
  • Issued: 09/03/2002
  • Est. Priority Date: 11/19/1997
  • Status: Expired due to Term
First Claim
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1. A vascular filter, which can be placed inside a blood vessel and which comprises:

  • in a radially compressed state, a tubular metal cylinder having a first and second integral cylindrical end collar at a proximal and distal end of the vascular filter;

    a plurality of ribs arranged in a preselected pattern and extending between the first and second end collar in a direction parallel to a longitudinal axis of the vascular filter;

    in radially expanded deployed state, the ribs tend to resiliently expand in radial directions, thereby causing the first and second end collars to move toward each other;

    each of the ribs tending to spread apart, such that the vascular filter defines a plurality of central parallel hexagon shapes arranged adjacently around a central circumference of the vascular filter, each of the ribs defining each hexagon shape extending in a plane parallel to the longitudinal axis of the vascular filter;

    the vascular filter further defining a first and second end filter portion connecting the central hexagons with the end collars, wherein the end filter portions each define a plurality of diamond shaped sections having four sides;

    each of the diamond shapes being formed by a first and second rib each forming a portion of a first and second of the central hexagon shapes, and by a first and second conical rib directly connecting an apex of the first and second of the central hexagon shapes with the end collars respectively;

    the conical ribs all extending along a first and second end cone;

    whereby the first and second filter sections enhance the effectiveness of the vascular filter.

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