Surface ablation lead and ablation equipment

Abstract

The present disclosure relates to a surface ablation electrode catheter and an ablation device. The surface ablation electrode catheter includes: an outer tube for forming a accommodating cavity and an electrode arm portion including at least three electrode arms, respectively provided with electrodes for ablation and each electrode arm includes a first spline segment, a second spline segment, a third spline segment, and a fourth spline segment, wherein when at least a portion of each electrode arm is set In the accommodating cavity, it is in a line-like contracted state; and when at least a portion of each electrode arm is disposed outside the accommodating cavity, it is in an extended state, and at this time, the first and second spline segments are in the first and second spline segments. is within the face and the third spline segment and the fourth spline segment are not within the first face, wherein the first spline segment includes the electrode arms extending from the tip to the first face at the farthest distance from the tip The portion of the first point, the second spline segment includes the portion extending from the first point to the second point away from the first face.

Description

technical field [0001] The present disclosure relates to the field of medical devices, and more particularly, to a surface ablation electrode catheter and an ablation device. Background technique [0002] Atrial fibrillation (AF) is a common cardiac arrhythmia that affects the lives of more than 33 million people worldwide. Radiofrequency ablation and cryoablation are two common methods currently clinically used to treat arrhythmias such as atrial fibrillation. In both types of ablation, the damage must be sufficient to destroy the arrhythmic tissue or substantially interfere with or isolate abnormal electrical conduction within the myocardial tissue, while excessive ablation affects surrounding healthy tissue and neural tissue, but insufficient ablation does not Blocks abnormal electrical conduction. Therefore, it is crucial to generate suitable ablation regions. [0003] Radiofrequency ablation adopts point-by-point ablation, which requires a long operation time and a h...

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Problems solved by technology

[0005] However, at present, the main ablation electrode catheters are mostly single-point ablation and annular ablation catheters adapted to the shape of the pulmonary vein ostium, including spherical, cage, basket-shaped or ring-shaped electrode catheters. The disadvantages of these forms of electrode catheters are: single-point ablation or The range of the electric field generated by the ring-shaped ablation electrode catheter is too small, which requires high precision in the surgical operation, and the surgical operation is time-consuming; while the catheter designed for the shape of the pulmonary vein ostium can only be used for pulmonary vein ablation, and its treatment area and indications are relatively large. limitations

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