Apparatus and method for engrafting a blood vessel

  • US 5,591,195 A
  • Filed: 10/30/1995
  • Issued: 01/07/1997
  • Est. Priority Date: 10/30/1995
  • Status: Expired due to Term
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First Claim
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1. An apparatus for engrafting a blood vessel comprising:

  • a hollow tubular graft of a preselected cross section having a proximal end, a distal end, and a middle portion; and

    said hollow tubular graft being capable of substantially deforming so as to conform to an interior surface of said blood vessel;

    a compressible and expandable proximal spring perpendicularly located at said proximal end of said hollow tubular graft, and said proximal spring being capable of deforming so as to conform tothe interior surface of said blood vessel;

    said proximal spring containing sufficient outward force to exert continuous force againstand inner wall of said blood vessel;

    said proximal spring being comprised of nitinol;

    a compressible and expandable distal spring perpendicularlylocated at said distal end of said hollow tubular graft, and said distal spring being capable of deforming so as to conform to the interior surface of said blood vessel;

    said distal spring containing sufficient outward force to exert continuous force against the inner wall of said blood vessel;

    said distal spring being comprised of nitinol;

    at least one flexible connecting bars for maintaining physical communication between said proximal and distal springs;

    said at least one connecting bars being comprised of nitinol;

    a graft material;

    said graft material encasing said proximal spring, said distal spring, and said at least one connecting bars;

    said graft material being distensible at said distal and said proximal ends to facilitate expansion of said proximal and distal springs.

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