Endovascular electrolytically detachable guidewire tip for the electroformation of thrombus in arteries, veins, aneurysms, vascular malformations and arteriovenous fistulas
DCFirst Claim
1. A method for forming an occlusion within a vascular cavity having blood disposed therein comprising the steps of:
- endovascularly disposing a guidewire near an endovascular opening into said vascular cavity;
disposing a distal tip of said guidewire into said vascular cavity to form said occlusion within said vascular cavity about said distal tip; and
detaching said distal tip from said guidewire to leave said distal tip within said vascular cavity and said occlusion being formed within said vascular cavity,whereby said vascular cavity is occluded by said distal tip, and any thrombus formed by use of said tip.
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Accused Products
Abstract
An artery, vein, aneurysm, vascular malformation or arterial fistula is occluded through endovascular electrothrombosis by the endovascular insertion of a platinum guidewire tip into the vascular cavity followed by application of a positive current. The guidewire tip is then separated from the guidewire by electrolytic separation of the tip from the guidewire. A portion of the guidewire connected between the tip and the body of the guidewire is comprised of stainless steel 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 is separated from the body of the guidewire. The guidewire and the microcatheter are thereafter removed leaving the guidewire tip embedded in the thrombus formed within the vascular cavity.
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Citations
23 Claims
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1. A method for forming an occlusion within a vascular cavity having blood disposed therein comprising the steps of:
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endovascularly disposing a guidewire near an endovascular opening into said vascular cavity; disposing a distal tip of said guidewire into said vascular cavity to form said occlusion within said vascular cavity about said distal tip; and detaching said distal tip from said guidewire to leave said distal tip within said vascular cavity and said occlusion being formed within said vascular cavity, whereby said vascular cavity is occluded by said distal tip, and any thrombus formed by use of said tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A guidewire for use in formation of an occlusion within a vascular cavity used in combination with a microcatheter comprising:
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a core wire, said core wire having a distal portion susceptible to electrolytic distintegration in blood; and an elongate tip portion extending said core wire for a predetermined lineal extent adapted to form said occlusion in said vascular cavity and coupled to said distal portion of said core wire tip portion for endovascular insertion within a vascular cavity, said elongate tip portion not being susceptible to electrolytic disintegration in blood, whereby endovascular occlusion of said vascular cavity can be performed. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A guidewire for use in formation of an occlusion used in combination with a microcatheter comprising:
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a core wire, said core wire having a distal portion susceptible to electrolytic disintegration in blood; and an elongate tip portion extending said core wire for a predetermined lineal extent and coupled to said distal portion of said core wire, said tip portion for endovascular insertion within a vascular cavity, said elongate tip portion not being susceptible to electrolytic disintegration in blood, wherein said elongate tip portion is a long and substantially pliable segment and is comprised of a mental not susceptible to electrolytic disintegration within blood, and wherein said long and pliable segment is prebiased to form a helix when extended from said microcatheter, whereby endovascular occlusion of said vascular cavity can be performed. - View Dependent Claims (22, 23)
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Specification