Endovascular electrolytically detachable wire and tip for the formation of thrombus in arteries veins aneurysms vascular malformations and arteriovenous fistulas
DCFirst Claim
1. A catheter wire for use in electrothrombosis in combination with a microcatheter comprising:
- a core wire having a main body and a distal portion, said distal portion being susceptible to electrolytic disintegration; and
a detachable coil for insertion within a body cavity, said detachable coil being coupled to said main body via said distal portion, being comprised of material not susceptible to electrolytic disintegration, and being prebiased to a spiral or helical shape such that on its advancement out of the distal end of a microcatheter and into a cavity it will change from being straight to its prebiased spiral or helical shape so that on the application of current to said detachable coil disposed in the cavity, electrothrombosis can be performed and at least one portion of said distal portion electrolytically disintegrated to detach said detachable coil from said main body.
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Abstract
An artery, vein, aneurysm, vascular malformation or arterial fistula is occluded through endovascular occlusion by the endovascular insertion of a platinum wire and/or tip into the vascular cavity. The vascular cavity is packed with the tip to obstruct blood flow or access of blood in the cavity such that the blood clots in the cavity and an occlusion if 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. The tip is then separated from the wire mechanically or by electrolytic separation of the tip from the wire. The wire and the microcatheter are thereafter removed leaving the tip embedded in the thrombus formed within the vascular cavity. Movement of wire in the microcatheter is more easily tracked by providing a radioopaque proximal marker on the microcatheter and a corresponding indicator marker on the wire. Electrothrombosis is facilitate by placing the ground electrode on the distal end of the microcatheter and flowing current between the microcatheter electrode and the tip.
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Citations
12 Claims
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1. A catheter wire for use in electrothrombosis in combination with a microcatheter comprising:
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a core wire having a main body and a distal portion, said distal portion being susceptible to electrolytic disintegration; and a detachable coil for insertion within a body cavity, said detachable coil being coupled to said main body via said distal portion, being comprised of material not susceptible to electrolytic disintegration, and being prebiased to a spiral or helical shape such that on its advancement out of the distal end of a microcatheter and into a cavity it will change from being straight to its prebiased spiral or helical shape so that on the application of current to said detachable coil disposed in the cavity, electrothrombosis can be performed and at least one portion of said distal portion electrolytically disintegrated to detach said detachable coil from said main body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification