Segmented saccular electrode catheter and ablation equipment comprising segmented saccular electrode catheter

Abstract

The present disclosure relates to an electrode catheter, the electrode catheter comprising: a bladder comprising at least three bladder sub-portions, the bladder sub-portions each having a contracted state and an expanded state, and wherein the at least three bladder sub-portions are capable of having expanded states of different degrees of expansion, respectively; at least three groups of electrode plates, wherein the at least three groups of electrode plates are associated with the at least three bag-shaped sub-parts; and the control part is configured to be used for controlling the expansion degree of the at least three bag-shaped sub-parts. According to the invention, the balloon is innovatively divided into a plurality of balloon-shaped sub-parts, and each balloon-shaped sub-part can have different expansion degrees, so that the finally formed ablation shape has variability, can be suitable for different target tissue shapes, and can be better attached, thereby realizing a better ablation effect.

Description

technical field [0001] The present disclosure relates to the field of medical equipment, and more specifically relates to a split-valve capsule electrode catheter and an ablation device including the split-valve capsule 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 ablat...

AI Technical Summary

Problems solved by technology

[0003] Radiofrequency ablation adopts point-by-point ablation, which requires a long operation time and requires a high level of catheter operation by the surgeon (such as a doctor). The patient will also experience discomfort due to the long time during the operation, and problems such as pulmonary vein stenosis are prone to occur after the operation.

In addition, radiofrequency ablation may disrupt the cardiac endothelial surface, activate the extrinsic coagulation cascade and lead to coking and thrombus formation, which in turn may lead to systemic thromboembolism

It can be seen that the application of RF energy to the target tissue can affect the non-target tissue, for example, the application of RF energy to the wall tissue of the atrium may cause damage to the digestive system or nervous system such as the esophagus

In addition, radiofrequency ablation may also cause tissue scarring, which further leads to embolism problems

However, cryoablation has a higher probability of phrenic nerve injury, and freezing of the epicardium near the coronary arteries may also lead to thrombosis and progressive coronary stenosis

[0004] At present, the main pulmonary vein ablation catheters are mostly single-point ablation catheters (radiofrequency) and balloon, basket-shaped or ring-shaped ablation catheters. The disadvantage is that the range of electric field generated by single-point ablation or ring-shaped ablation catheters is relatively small, which requires more surgical operations. High, and the operation is time-consuming

However, the shapes of the basket-shaped and balloon-shaped catheters are fixed, and they cannot be applied to pulmonary vein ablation with irregular shapes such as ellipse, and it is difficult for the electrodes to be completely attached.

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