Method and apparatus for endovascular thermal thrombosis and thermal cancer treatment
First Claim
1. An endovascular device for use within a vascular system comprising:
- at least one delivery wire having a first resistance; and
at least one detachable heating coil having a second resistance coupled to said delivery wire, said first resistance being less than said second resistance, wherein said delivery wire and heating coil are both electrically insulated to permit endovascular disposition of said delivery wire and heating coil into said vascular system for the purpose of delivering heat to a fluid within said vascular system at a predetermined location, substantially all of said heat being generated by electrical current flowing flowing within said heating coil rather than within said delivery wire,whereby endovascular thermal treatment is provided within said vascular system.
1 Assignment
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Accused Products
Abstract
A trombus is generated in an aneurysm, arteriovenous malformation or fistula by means of a catheter having an insulated heating coil coupled to an insulated delivery wire. In one embodiment, two delivery wires are coupled to heating coils to provide a closed circuit. The heating coils may be in the form of a double helix or a single helix in combination with a straight heating coil. The heating coils may be electrolytically or mechanically detached therefrom. Alternatively, a single insulated heating coil may be attached to a single insulated delivery wire with a uninsulated coil attached to the tip of the insulated heating coil. The electrical circuit is then made through the heating coil and non-insulated electrode coil into the vascular system and to a body electrode. A catheter may also be used for heating blood within the vascular system which is directly flowed into a tumoral mass for the purposes of thermal treatment of cancer.
214 Citations
19 Claims
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1. An endovascular device for use within a vascular system comprising:
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at least one delivery wire having a first resistance; and at least one detachable heating coil having a second resistance coupled to said delivery wire, said first resistance being less than said second resistance, wherein said delivery wire and heating coil are both electrically insulated to permit endovascular disposition of said delivery wire and heating coil into said vascular system for the purpose of delivering heat to a fluid within said vascular system at a predetermined location, substantially all of said heat being generated by electrical current flowing flowing within said heating coil rather than within said delivery wire, whereby endovascular thermal treatment is provided within said vascular system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for forming a thrombus at a predetermined location within a vascular system comprising:
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disposing a microcatheter within said vascular system at said predetermined location; disposing from said microcatheter at said predetermined location at least one insulated heating coil, said insulated heating coil being electrically coupled to an insulated delivery wire included within said microcatheter and extending exteriorly to said vascular system; applying electrical current through said delivery wire to said heating coil to heat fluid within said vascular system at said predetermined location to thermally form a thrombus thereat; and detaching said delivery wire from said heating coil; and withdrawing said microcatheter and delivery wire from said vascular system, whereby thermal formation of a thrombus within said vascular system is selectively formed. - View Dependent Claims (17, 18, 19)
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Specification