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Embolus blood clot filter with floating filter basket

  • US 8,562,638 B2
  • Filed: 12/29/2006
  • Issued: 10/22/2013
  • Est. Priority Date: 12/30/2005
  • Status: Active Grant
First Claim
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1. A filter to be placed in a flow of blood through a blood vessel having a blood vessel wall, the filter comprising:

  • a) a first plurality of circumferentially spaced apart filter members defining a first filter having a first diameter, a plurality of the filter members of the first plurality being anchor members configured to anchor the first filter to the blood vessel wall;

    b) a second filter in the form of a basket positioned upstream from and connected to the first filter, the second filter including a second plurality of circumferentially spaced apart filter members defining a second diameter that is smaller than the first diameter; and

    c) the second diameter being maintained by a plurality of retainer members that prevent outward radial movement of the second plurality of filter members so that blood can flow around the basket, in between the basket and the vessel wall;

    wherein the plurality of retainer members extend to a diameter smaller than the first diameter.

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