A traction-acting external support for restoring valve competence to veins that include venous valves become slackened and so incompetent, to be implanted about a vein along the length of the vein;
- the vein including a posterior and an anterior wall;
- which external support is comprised of, in combination:
- two arcuate frame shells, having longitudinal sides, in an elastically flexible elongated material;
- said frame shells respectively being a posterior or deep frame shell and an anterior or superficial frame shell;
- said posterior frame shell being comprised of two branches of said elongated material penetratingly shaped for an easy insertion of said posterior frame shell behind the posterior wall of a vein, through two paths prepared by the surgeon;
- said two penetratingly shaped branches of said elongated material of said posterior frame shell being a proximal and a distal narrow bend of the elongated material, having apices shaped as eyelets;
- said proximal and distal narrow bends of said posterior frame shell being centrally and continuously connected with each other by a large, central bend;
- said anterior frame shell having the same structure as said posterior frame shell, with a proximal bend with an eyelet;
- a distal bend with an eyelet, and a central bend, but said proximal and distal bends not having to be shaped penetratingly;
- said two frame shells being conformed to be juxtaposed to each other about a vein by their longitudinal sides, turning their concavities to each other, to assemble the support defining an ellipse shaped tunnel to receive the vein thereinto;
- said two frame shells being integral with each other, being connected to each other by hinge by a longitudinal side thereof;
- the external support having a proximal section formed by proximal branches, a proximal branch of said posterior frame shell which is arcuate with its concavity outwards, and a proximal branch of said anterior frame shell which is arcuate with its convexity outwards, so that the external support, once assembled from said frame shells, has an inclined mouth, which can conform itself to the confluence of two veins;
- each frame shell including a respective traction side including longitudinal rectilinear side traction branch;
- said two frame shells having a respective longitudinal side of their ellipse shape adapted to constitute said traction side;
- said traction sides being adapted to be engaged to the vein by opposite valve intercommissural walls by means of surgical sutures to dilate the intercommissural diameter of the vein by traction, so as to absorb the slackening of an incompetent venous valve by extending its cusps.