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Apparatus for removing blood clots from arteries and veins

  • US 5,102,415 A
  • Filed: 08/30/1990
  • Issued: 04/07/1992
  • Est. Priority Date: 09/06/1989
  • Status: Expired due to Term
First Claim
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1. An apparatus for removing blood clots from arteries and veins, comprising a first outer catheter, a second intermediate catheter for insertion through said first outer catheter, said second intermediate catheter having a distal tubular end, a third inner catheter for insertion through said second intermediate catheter, clot receptacle means secured to said end of said intermediate catheter, said clot receptacle means comprising an elastically yielding radially expandable tubular spring structure for receiving a blood clot, said tubular spring structure being made of elastical intermeshing elements in the form of spring wires or elastic monofilaments of synthetic materials, said tubular spring structure having a first fixed end diameter fitted and secured to said distal tubular end of said second intermediate catheter and a second diameter that is expandable and contractable along the length of said tubular spring structure when said intermeshing elements assume different angular positions relative to each other inside and outside said first outer catheter, and an inflatable balloon at a distal end of said third inner catheter for pulling a blood clot into said receptacle means when said receptacle means is radially expanded and said balloon is inflated.

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