Detachable endovascular occlusion device activated by alternating electric current
First Claim
Patent Images
1. An apparatus for selectively providing endovascular occlusion in a patient comprising:
- a delivery wire guidablc 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 conductive coil,whereby a controllable occlusive apparatus efficacious and usable in small vessels is provided.
1 Assignment
0 Petitions
Accused Products
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 coil on the end of a microcatheter. A Guglielmi Detachable Coil (GDC) is preferably used in the combination with radio frequency energy to cause local heating at the coil. 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.
-
Citations
21 Claims
-
1. An apparatus for selectively providing endovascular occlusion in a patient comprising:
-
a delivery wire guidablc 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 conductive coil, whereby a controllable occlusive apparatus efficacious and usable in small vessels is provided. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An apparatus for creating an endovascular occlusion at a selectively occlusion site comprising:
-
a conductive delivery wire; a selectively disposable and detachable conductive coil coupled to said delivery wire and disposable by said delivery wire at or near said occlusion site; and an alternating current signal source electrically coupled to said delivery wire and coil for providing a source of heating energy at said coil, whereby said apparatus is a controllable occlusive device usable and efficacious in small vessels. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. A method of forming a vascular occlusion comprising:
-
providing a conductive delivery wire; disposing a conductive coil coupled to said delivery wire at or near a selected occlusion site; applying an alternating current to said coil to coagulate said occlusion site; determining whether a predetermined amount of electrocoagulation has occurred at said occlusion site; terminating said alternating current through said coil when said step of determining establishes that said predetermined electrocoagulation has occurred; and detaching said coil from said delivery wire to leave said coil at said occlusion site, whereby an occlusion is efficaciously provided in a small vessel. - View Dependent Claims (21)
-
Specification