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 Title: |
US5976131:
Detachable endovascular occlusion device activated by alternating electric current
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Guglielmi, Guido; Santa Monica, CA
Ji, Cheng; Los Angeles, CA
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| Assignee: |
The Regents of the University at California, Oakland, CA
other patents from UNIVERSITY OF CALIFORNIA, THE REGENTS OF (599425) (approx. 4,840)
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| Published / Filed: |
1999-11-02
/ 1996-06-18
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| Application Number: |
US1996000666804
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| IPC Code: |
IPC-7:
A61B 17/39;
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| U.S. Class: |
Current:
606/049;
606/032;
606/040;
Original:
606/049;
606/032;
606/040;
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| Field of Search: |
606/032,41,40,49
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| Priority Number: |
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| Abstract: |
An apparatus is provided for electrocoagulating blood and tissue at an occlusion site by means of application of an alternating signal or current through a detachable partially insulated coil on the end of a microcatheter. A Guglielmi Detachable Coil (GDC) is preferably used in the combination with damped radio frequency energy to cause local heating at the location of the coil but without local ohmicly heated tissue damage or hot spots. Damping of the radio frequency energy facilitates the avoidance of hot spots. Once carbonization of blood at the detachment zone of the GDC coil occurs, the impedance of the entire system increases. The impedance increase is detected to automatically turn off the alternating current and then to apply a direct current to electrolytically detach the GDC coil from the microcatheter.
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| Attorney, Agent or Firm: |
Dawes, Daniel L. ;
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| Primary / Asst. Examiners: |
Cohen, Lee;
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| INPADOC Legal Status: |
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| Parent Case: |
This application is a continuation-in-part of U.S. patent application Ser. No. 08/323,662, entitled DETACHABLE ENDOVASCULAR OCCLUSION DEVICE ACTIVATED BY ALTERNATING ELECTRIC CURRENT, filed Oct. 17,1994 which issued as U.S. Pat. No. 5,569,245, which was a continuation-in-part of application Ser. No. 08/311,508 filed Sep. 23, 1994, now U.S. Pat. No. 5,540,680, which in turn was a continuation of application of Ser. No. 07/840,211 filed Feb. 24, 1992 and issued as U.S. Pat. No. 5,354,295, which in turn was a continuation in part of 07/492,717 filed Mar. 13, 1990 which issued as U.S. Pat. No. 5,122,136.
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| Family: |
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First Claim:
Show all 26 claims |
We claim:
1. An apparatus for selectively providing endovascular occlusion in a patient comprising:
- a delivery wire guidable to or near an endovascular occlusion site;
- a detachable conductive coil temporarily and selectively coupled to said delivery wire; and
- an alternating current generator selectively coupled to said detachable coil for delivering damped RF power signals to said occlusion site,
- whereby a controllable occlusive apparatus efficacious and usable in small vessels is provided.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
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