Pulmonary vein PFA atrial fibrillation ablation catheter

Abstract

The invention discloses a pulmonary vein PFA atrial fibrillation ablation catheter which comprises an outer catheter, an inner catheter is sleeved with the outer catheter, a memory ablation needle set is arranged on the inner catheter, and the memory ablation needle set is composed of a plurality of memory ablation needles evenly arranged on the inner catheter in a circumferential mode. An ablation electrode is arranged in the middle of the upper surface of the memory ablation needle; the memory ablation needle is made of a memory alloy material. When the PFA ablation catheter is applied to pulmonary vein ablation, the memory ablation needle has very good flexibility and elasticity, and when the memory ablation needle set extends out of the outer end of the outer catheter to be opened, the memory ablation needle can be well matched with a pulmonary vein cavity in shape, so that the purpose that an ablation electrode is firmly attached to a myocardial wall is achieved; due to the arrangement of the width of the ablation electrode and the memory ablation needle, after the memory ablation needle is attached to the myocardial wall, the ablation electrode can be isolated from blood, a blood low-resistance path is cut off, and bubbles generated by electrolysis are prevented.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a pulmonary vein PFA atrial fibrillation ablation catheter. Background technique [0002] The existing pulmonary vein ablation catheters are generally petal-shaped ablation catheters and ring-shaped ablation catheters. These two shapes of ablation catheters have the problem that the electrodes and the myocardial wall are not tightly attached, and the ablation depth is prone to insufficient problems. At the same time, the ablation catheters of these two shapes The electrode of the catheter is exposed in the heart blood. During the ablation process, the blood flowing through the ablation electrode will generate a certain current, which will cause air bubbles in the atrium, resulting in gas embolism. [0003] Based on this, the present invention designs a pulmonary vein PFA atrial fibrillation ablation catheter. Contents of the invention [0004] The purpose of the presen...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a pulmonary vein PFA atrial fibrillation ablation catheter to solve the problem that the electrode and the myocardial wall are not tightly attached to the existing two shapes of the ablation catheter proposed in the background technology, and the problem of insufficient ablation depth is prone to occur. At the same time, the electrodes of these two shapes of ablation catheters are exposed in the heart blood. During the ablation process, the blood flowing through the ablation electrodes will generate a certain current, which will cause air bubbles in the atrium, resulting in the problem of gas embolism.

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