Irrigated ablation catheter having magnetic tip for magnetic field control and guidance

a technology of magnetic field control and irrigated ablation, which is applied in the field of irrigated ablation catheters and electrode assemblies, can solve the problems of reducing the accuracy of monitoring and/or controlling the temperature of the ablation assembly, rendering accurate monitoring and control of the ablative process more difficult, and reducing so as to reduce the risk of coagulation and the associated problems, the electrode surface cooling is improved, and the temperature measurement of the electrode tip temperatur
US20080091193A1Inactive Publication Date: 2008-04-17ST JUDE MEDICAL ATRIAL FIBRILLATION DIV
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
ST JUDE MEDICAL ATRIAL FIBRILLATION DIV
Publication Date
2008-04-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

Embodiments of the present invention provide an irrigated ablation electrode assembly for use with an irrigated catheter device comprises at least one passageway for a fluid with an outlet disposed at an external surface of the electrode assembly; a permanent magnet; a shield separating the permanent magnet from the at least one passageway and from an exterior, the shield being substantially less oxidizable than the permanent magnet; and an electrode having an external electrode surface. A catheter guidance control and imaging system drives the permanent magnet to guide and control the catheter tip. In specific embodiments, the irrigation fluid flow paths through the electrode assembly are thermally insulated from the electrode and temperature sensor. The irrigation fluid is directed at target areas where coagulation is more likely to occur. One or more monitoring electrodes are provided for mapping or other monitoring functions.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation-in-part of U.S. patent application Ser. No. 11 / 948,362, filed on Nov. 30, 2007, which is a continuation-in-part of U.S. patent application Ser. No. 11 / 434,200, filed May 16, 2006, the entire disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTION

[0002] a. Field of the Invention

[0003] The present invention pertains generally to ablation catheters and electrode assemblies. More particularly, the present invention is directed toward ablation electrode assemblies for use in the human body having a magnetic tip for magnetic field control and guidance, a mechanism for irrigating targeted areas, and mapping characteristics.

[0004] b. Background Art

[0005] Electrophysiology catheters are used for an ever-growing number of procedures. For example, catheters are used for diagnostic, therapeutic, and ablative procedures, to name just a few examples. Typically, the catheter is manip...

Claims

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