Ablation catheter

Abstract

The ablation catheter comprises an inner tube, a middle tube, an outer tube and an ablation device, the inner tube, the middle tube and the outer tube are arranged in a sleeved mode, the ablation device comprises at least two electrode arms, and each electrode arm is provided with at least one electrode; the near end of the electrode arm is fixedly connected with the middle tube, and an electric wire communicated with the electrode is located between the middle tube and the outer tube; a support structure is arranged at the far end of the electrode arm; the supporting structure comprises a plurality of supporting arms, the far end of each electrode arm is connected with at least two supporting arms, and the other end of each supporting arm is fixedly connected with the inner tube; an included angle exists between each supporting arm and the electrode arm connected with the supporting arm, and at least one supporting arm and other supporting arms are located on the different sides of the plane formed by the electrode arm and the inner pipe. According to the ablation catheter, the far ends of the electrode arms and the inner tube are connected through the supporting structures, the distance between the adjacent electrode arms is kept stable, and safety and stability are improved.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to an ablation catheter. Background technique [0002] Atrial fibrillation (AF), a rapid heart rhythm disorder, increases in frequency with age, up to 10% of people over 75 years of age. During atrial fibrillation, the frequency of atrial excitation reaches 300-600 beats per minute, and the heartbeat frequency is often fast and irregular, not only much faster than normal heartbeat, but also irregular, and the atrium loses effective systolic function. The prevalence of atrial fibrillation is also closely related to diseases such as coronary heart disease, hypertension and heart failure. [0003] The number of procedures for the treatment of atrial fibrillation by catheter ablation has increased significantly in recent years. Catheter ablation refers to inserting a slender ablation catheter into the cardiac cavity through the femoral vein, and after atrial septal p...

AI Technical Summary

Problems solved by technology

However, the electrode arm made of memory alloy is also prone to unexpected deformation when subjected to external force, which will affect the function of the electrode arm

In particular, when two adjacent electrode arms are too close due to external force, the electrode spacing on the electrode arms will become too small, causing arcing and even a risk of short circuit

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