Endovascular electrolytically detachable guidewire tip

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/14 (2006.01) A61B 17/12 (2006.01) A61B 17/00 (2006.01) A61B 18/12 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2055492

An artery, vein, aneurysm, vascular malformation or arterial fistula is occluded through endovascular electrothrombosis by the endovascular insertion of a platinum guidewire tip (30) into the vascular cavity followed by application of a positive current. The guidewire tip (30) is then separated from the guidewire by electrolytic separation of the tip from the guidewire (10). A portion (26) of the guidewire (10) connected between the tip (30) and the body of the guidewire (10) is comprised of stainless steed and exposed to the bloodstream so that upon continued application of a positive current to the exposed portion, the exposed portion is corroded away at least at one location and the tip (30) is separated from the body of guidewire (10). The guidewire (10) and the microcatheter are thereafter removed leaving the guidewire tip (30) embedded in the thrombus formed within the vascular cavity.

Une artère, une veine, un anéurisme, une malformation vasculaire ou une fistule artérielle peuvent être occluses au moyen de l'électrothrombose endovasculaire par l'insertion endovasculaire d'une extrémité de fil de guidage en platine (30) dans la cavité vasculaire, suivie de l'application d'une charge de courant positif. L'extrémité du fil de guidage (30) est alors séparée dudit fil par la séparation électrolytique de l'extrémité et du fil de guidage (10). Une partie (26) du fil (10), connectée entre l'extrémité (30) et le corps du fil de guidage (10) est composée d'acier inoxydable et exposée au flux sanguin de sorte que, sous l'application continue d'un courant positif à la partie exposée, celle-ci est corrodée en au moins un endroit, et l'extrémité (30) est alors séparée du corps du fil de guidage (10). Le fil de guidage (10) et le micro-cathéter sont ensuite enlevés, laissant l'extrémité du fil (30) implanté dans le thrombus formé à l'intérieur de la cavité vasculaire.

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