In an endovascular electrolytically detachable wire and tip for

Details In an endovascular electrolytically detachable wire and tip for In an endovascular electrolytically detachable wire and tip for

1992-02-24

1994-10-11

Cohen, Lee S.

Surgery

Instruments

Electrical application

606 41, 606108, 606191, A61B 1738, A61B 1700

Patent

active

053542959

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.

REFERENCES:
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patent: 4735201 (1988-04-01), O'Reilly
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patent: 4820298 (1989-04-01), Leveen et al.
patent: 4994069 (1991-02-01), Ritchart et al.
patent: 5108407 (1992-04-01), Geremia et al.
patent: 5122136 (1992-06-01), Guglielmi et al.

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