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Radio-frequency ablation and direct current electroporation catheters

a technology of direct current and electroporation catheter, which is applied in the field of radiofrequency ablation catheters, can solve the problems of difficult to keep adequate contact between electrodes and tissue for a sufficient length of time, affecting the quality of life of the patient,

Inactive Publication Date: 2019-11-21
ST JUDE MEDICAL CARDILOGY DIV INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a flexible catheter with a high-density array of electrodes that can be used for both electrophysiology mapping and ablation. The catheter has a planar array or a basket design and includes a plurality of struts or splines that detect and ablate tissue. The catheter also has temperature sensors and ablation controller circuitry that control power delivery to each electrode based on temperature information. The technical effects of this patent include improved accuracy in detecting and abating abnormal electrophysiological characteristics in tissue, which can lead to improved clinical outcomes.

Problems solved by technology

When conducting an ablation therapy on myocardial tissue, the beating of the heart, especially if erratic or irregular, makes it difficult to keep adequate contact between electrodes and tissue for a sufficient length of time.
These problems are exacerbated on contoured, irregular, or trabeculated surfaces.
If the contact between the electrodes and the tissue cannot be sufficiently maintained, quality lesions are unlikely to result.

Method used

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  • Radio-frequency ablation and direct current electroporation catheters
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  • Radio-frequency ablation and direct current electroporation catheters

Examples

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Embodiment Construction

[0024]Aspects of the present disclosure are directed to flexible catheters for both electrophysiology mapping and ablation using a high-density array of electrodes. These catheters may be used to detect electrophysiological characteristics of tissue in contact with the electrodes, and conduct monopolar and / or bipolar ablations of the tissue. In particular, the instant disclosure relates to both planar and basket-type end effectors coupled to a distal end of a catheter shaft.

[0025]To conduct an electrophysiology mapping of a cardiac muscle, pacing is conducted. During the pacing procedure, adjacent electrodes are assigned to bipole pairings, and each bipole pair samples the electrical characteristics of the tissue between the pair. The resulting electrical signals are received and processed by controller circuitry. The controller circuitry develops an electrophysiology mapping by associating the signal samples from each bipole pair with a location of the tissue sampled by the bipole ...

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Abstract

Aspects of the present disclosure are directed to flexible catheters for both electrophysiology mapping and ablation using a high-density array of electrodes. These catheters may be used to detect electrophysiological characteristics of tissue in contact with the electrodes, and conduct monopolar and bipolar ablations of the tissue.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of U.S. provisional application No. 62 / 674,314, filed 21 May 2018, which is hereby incorporated by reference as though fully set forth herein.BACKGROUND[0002]a. Field[0003]The instant disclosure relates to radio-frequency ablation catheters for treating myocardial tissue within a cardiac muscle, for example. In particular, the instant disclosure relates to basket and planar array catheters including a plurality of electrodes positioned in a high-density array.[0004]b. Background Art[0005]Catheters have been used for cardiac medical procedures for many years. Catheters can be used, for example, to diagnose and treat cardiac arrhythmias, while positioned at a specific location within a body that is otherwise inaccessible without a more invasive procedure.[0006]Conventional ablation catheters may include, for example, a plurality of adjacent ring electrodes encircling the longitudinal axis of a basket cathe...

Claims

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Application Information

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IPC IPC(8): A61B18/14A61B5/042A61B5/00
CPCA61B2018/00267A61B2018/00613A61B2018/00839A61B2018/1405A61B2018/1467A61B5/0422A61B2018/00351A61B5/044A61B5/6858A61B18/1492A61B2562/0209A61B2018/00577A61B2017/00867A61B2018/0016A61B2018/00357A61B2018/00363A61B2505/05A61B2562/0271A61B5/4848A61B5/6859A61B5/01A61B2018/00797A61B2017/00092A61B2017/00101A61B2017/00243A61B2017/00053A61B2034/2051A61B2034/2053A61N1/056A61B5/287A61B5/361
Inventor SUTERMEISTER, DEREK C.TEGG, TROY T.GONZALEZ, SALOME A.
Owner ST JUDE MEDICAL CARDILOGY DIV INC
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