Electrode assembly, ablation catheter and ablation system

Abstract

The invention provides an electrode assembly, an ablation catheter and an ablation system. The electrode assembly at least comprises a first electrode and a second electrode, wherein the second electrode is arranged farther away from target tissue relative to the first electrode and can be used for current shunting. The working state of the second electrode can be switched between a contraction state and an expansion state. The ablation system comprises a pulse ablation module, an ablation catheter and a control device. Part of the second electrode in the ablation catheter expands outwards, so that the second electrode can perform current shunting without generating a current electric field concentration effect, and the ablation catheter can be used in a pulsed electric field with higher voltage. In addition, due to the fact that the first electrode and the second electrode cooperate for ablation, the ablation depth of the ablation catheter at the target tissue can be increased. Meanwhile, according to the ablation system, the attaching degree of the ablation catheter and the target tissue is preferably obtained through the control device.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an electrode assembly, an ablation catheter and an ablation system. Background technique [0002] In the field of electrophysiological therapy, the use of ablation catheters to deliver energy and perform tissue ablation is a common means. After the head end (distal end) of the ablation catheter is inserted into the heart and reaches the corresponding treatment target position, the energy medium (such as radio frequency, ultrasound, pulse, etc.) is sent to the head end of the ablation catheter through the energy platform connected to the tail end (proximal end) of the ablation catheter The energy transmission electrode on the upper body, after the electrode is attached to the tissue, the energy is transmitted to the tissue, and the tissue is ablated at a point or a line. [0003] Currently common pulsed electric field ablation catheters use a combination of a conventional...

AI Technical Summary

Problems solved by technology

However, this ablation catheter is difficult to perform spot ablation on thick myocardial tissue

Because point ablation of thicker myocardial tissue requires the use of a pulsed ablation field with a higher voltage to reach a deeper ablation site, but in a high-voltage pulsed electric field, the edge of the ring electrode will form an electric field current concentration effect, resulting in arc exotherm. As a result, side effects such as carbonization, thrombus, and air bubbles will occur on the surface of myocardial tissue during the treatment process, which will limit the ablation effect of the ablation catheter or lead to ablation complications

In addition, traditional point ablation catheters cannot sense the closeness of the ablation catheter to the myocardial tissue, which often causes the ablation catheter to cause ineffective ablation.

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