Double-loop electrode catheter and ablation device comprising same

Abstract

The present disclosure relates to an electrode catheter which comprises a front end support part configured as a front end free end of the electrode catheter; a rear end control part and the front end support part are respectively arranged at two ends of the electrode catheter; an inner tube extending at least between the front end support part and the rear end control part and configured to define a shape of the electrode catheter; an outer tube wraps the inner tube, and the distance between the far end of the outer tube and the far end of the inner tube is fixed; and an electrode arm part is arranged between the inner tube and the outer tube and comprises a first electrode arm and a second electrode arm, the far end of the first electrode arm and the far end of the second electrode arm are fixedly connected with the inner tube through the front end supporting part and extend between the front end supporting part and the rear end control part, the first part of the first electrode arm and the second part of the second electrode arm are suitable for being switched between a first linear state and a second annular state, and each of the first part and the second part comprises at least one electrode.

Description

technical field [0001] The present disclosure relates to the field of medical equipment, and more particularly relates to a double-coil electrode catheter and an ablation device including the double-coil electrode catheter. Background technique [0002] Atrial fibrillation (AF) is a common heart rhythm disorder that affects more than 33 million people worldwide. Radiofrequency ablation and cryoablation are two common methods currently used clinically to treat arrhythmias such as atrial fibrillation. The damage of these two kinds of ablation must be enough to destroy the arrhythmia tissue or substantially interfere or isolate the abnormal electrical conduction in the myocardial tissue, and excessive ablation will affect the surrounding healthy tissue and nerve tissue, but insufficient ablation will not achieve The effect of blocking abnormal electrical conduction. Therefore, it is crucial to generate a suitable ablation region. [0003] Radiofrequency ablation adopts point...

AI Technical Summary

Problems solved by technology

[0005] First of all, the single-ring electrode arm is not easy to locate and stick to, and its single size cannot be applied to pulmonary vein ostia of various shapes and sizes

In addition, the electrode arms are made of nickel-titanium alloy or stainless steel, and each electrode arm is about 1mm. Due to the different shapes and sizes of the pulmonary vein ostium, only a single expanded size electrode arm is easily deformed or cannot be easily deformed when it is attached to the pulmonary vein ostium. Good fit, and the fit angle is not easy to control

[0006] Secondly, the current balloon catheters need to be used with mapping electrode catheters to judge the isolation of pulmonary veins, and the operation cost is high

[0007] Furthermore, the simulated electric field effect is not ideal

Apply the corresponding voltage to the single-ring and flower-shaped electrode arm model for simulation, and the effect of the pulsed electric field is not ideal

Resulting ablation zone is poorly aligned in the pulmonary vein axis

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