Ablation catheter

Abstract

The invention discloses an ablation catheter which comprises a catheter body and a head electrode. The near end of the head electrode is connected with the far end of the tube body. The outer surface of the head electrode serves as a binding face attached to the target tissue area. And the outer surface is one of a spherical surface, a spherical crown surface and an arc surface. The head electrode is used for transferring ablation energy to the target tissue area for ablation. Due to the fact that the outer surface of the head electrode is the spherical surface or the spherical crown surface or the arc surface, when the ablation catheter is attached to a target tissue area, the head of the ablation catheter can achieve attachment of the head electrode to the target tissue area in any direction, and therefore energy can be accurately and intensively applied to the target tissue area instead of being applied to blood. The target tissue area is ablated more thoroughly, and the ablation effect is better.

Description

technical field [0001] The present application relates to the technical field of medical devices, and in particular, to an ablation catheter. Background technique [0002] Tissue ablation is commonly used to treat various cardiac arrhythmias, including atrial fibrillation. At present, the main ablation method on the market is radiofrequency ablation. Radiofrequency ablation therapy is to release radiofrequency current to generate thermal energy to ablate the lesion, causing coagulation necrosis of the endocardium and subendocardial myocardium, blocking the reentrant loop or eliminating the lesion. Radiofrequency ablation is non-selective, damages surrounding tissues, increases postoperative complications, and has a high recurrence rate. If the energy is low, it will not penetrate the wall. If the energy is high, it is easy to damage other tissues around the myocardium, and it is also easy to produce gas explosion and scab. And it depends on the contact force of the catheter...

AI Technical Summary

Problems solved by technology

[0004] Although pulse ablation does not have high requirements for abutment, in fact, when the ablation is better, the ablation effect is better. Most of the ablation catheter ablation electrodes in the prior art are ring-shaped electrodes, and the heart is beating, so it is difficult to ensure that the ablation catheter is vertically attached. Depending on the myocardial tissue, it is easy to cause the tissue to be ablated incompletely, and it is impossible to realize the contact between the electrode and the tissue at any position during the entire ablation process, and it is impossible to ensure that the ablation energy field concentrates on the target tissue area, which affects the ablation effect

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