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Kit for medical use composed of a filter and a device for placing it in the vessel

  • US 5,649,953 A
  • Filed: 05/09/1995
  • Issued: 07/22/1997
  • Est. Priority Date: 09/28/1992
  • Status: Expired due to Term
First Claim
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1. A kit for medical use, comprising a filter adapted to be inserted into a vein, a flexible metal guide, a push-rod and an insertion tube, in whicha) the filter, which includes radially expandable elastic lugs each having a distal end and a proximal end, said distal ends of said lugs extending outwardly approximately in a shape of a conical corolla, said distal ends of said lugs are capable of being folded inwardly, said proximal ends of said lugs are joined at a head which has a small circular orifice of diameter D1 to receive said guide,b) the metal guide formed from a flexible wire has a cross-sectional diameter D2,c) the push-rod having a distal end is a hollow tube of internal diameter D3, and receives said guide therein,d) the insertion tube having a distal end is hollow and surrounds said push-rod, wherein said distal end of said lugs are capable of being folded inwardly and received in said distal end of said insertion tube;

  • said distal end of said insertion tube having a rigid cylindrical cap of internal diameter D4, said cap having an annular internal shoulder at a distal end, which is capable of acting as a stop for said distal end of the lugs of the filter, diameters of each component being such that D4>

    D3>

    D1>

    D2, such that when said distal ends of said lugs are folded back inside said cap, the distal end of said push rod bears against said head.

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