Vena cava filter delivery system

  • US 5,681,347 A
  • Filed: 05/23/1995
  • Issued: 10/28/1997
  • Est. Priority Date: 05/23/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for delivery of self-expanding vena cava filter having a radially extending penetrating portion, said method comprising the steps of:

  • A) positioning an impervious, relatively short segment in a distal section of a radially flexible, axially stiff elongated tube,B) positioning the vena cava filter in the distal section of the tube with the segment interposed between the penetrating portions of the filter and the tube;

    C) urging the distal section of the tube to a delivery site with a distal end of the tube positioned proximate the delivery site such that during said step of urging the distal section the distal end of the tube remains relatively radially flexible therealong with the segment overlying the penetrating portions; and

    D) urging the filter distally with respect to said tube to move the filter through an aperture in the distal end of the tube and thereby to deploy the filter at the delivery site.

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