ENDOVASCULAR ELECTROLYTICALLY DETACHABLE WIRE FOR THROMBUS FORMATION

摘要

An artery, vein, aneurysm, vascular malformation or arterial fistula is occluded through endovascular occlusion by the endovascular insertion of a platinum wire (56) and/or tip (53) into the vascular cavity. The vascular cavity is packed with the tip (58) to obstruct blood flow or access of blood in the cavity such that the blood clots in the cavity and an occlusion is formed. The tip may be elongate and flexible so that it packs the cavity by being folded upon itself a multiple number of times, or may pack the cavity by virtue of a filamentary or fuzzy structure of the tip (104). The tip is then separated from the wire mechanically or by electrolytic separation of the tip from the wire. The wire and the microcatheter (144) are thereafter removed leaving the tip embedded in the thrombus formed within the vascular cavity. Movement of wire in the microcatheter (144) is more easily tracked by providing a radiopaque proximal marker (110) on the microcatheter and corresponding indicator marker (112) on the wire. Electrothrombosis is facilitated by placing the ground electrode (114) on the distal end of the microcatheter and flowing current between the microcatheter electrode and the tip.