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Collapsible filter for introduction in a blood vessel of a patient

  • US 5,133,733 A
  • Filed: 10/31/1990
  • Issued: 07/28/1992
  • Est. Priority Date: 11/28/1989
  • Status: Expired due to Term
First Claim
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1. A collapsible filter for introduction into a blood vessel of a patient comprising a plurality of legs diverging from an apical hub and each of said plurality of legs having a reversely turned hook at their respective distal ends with respect to said hub, wherein each of said plurality of the legs comprise a central element, and two curved side elements extending on either side of the central element, wherein the curved side elements of each leg are formed from one piece of wire the ends of which are joined together at the apical hub, whereby the filter as a whole may be unfolded from a collapsed insertion condition in which the central elements and side elements of the legs form a narrow bundle for arrangement in a catheter like insertion instrument into a tulip like filter configuration with the side elements interposed between the central elements of the legs.

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