Radiofrequency ablation catheter for implementing pulmonary nerve ablation, and radiofrequency ablation system

Abstract

The invention discloses a radiofrequency ablation catheter for implementing pulmonary nerve ablation, and a radiofrequency ablation system. The radiofrequency ablation catheter comprises a core tube assembly and a plurality of electrodes installed on the core tube assembly, the core tube assembly comprises a core tube, the far end part of the core tube is an expansion part, the expansion part hasa loading state and an expansion state which are opposite to each other, the expansion part in the expansion state is in a closed or open ring shape, and the electrodes are arranged on the expansion part at intervals; and a conveying channel is further arranged in the core tube assembly, one end of the conveying channel is used for being connected with a cooling medium conveying device, and the other end of the conveying channel extends to the expansion part and is independently provided with an output port for each electrode. The arrangement of the expansion part makes the core tube assemblyrealize stable, convenient and accurate ablation operation on respiratory tracts with different positions and shapes, and the operation efficiency and the treatment effect are improved.

Description

technical field [0001] The present application relates to the field of interventional therapy, in particular to a radiofrequency ablation catheter and a radiofrequency ablation system for performing pulmonary nerve ablation. Background technique [0002] Chronic Obstructive Pulmonary Disease (COPD) is the most common disease of the respiratory system. In our country, according to the existing epidemiological survey evidence, the prevalence of COPD among adults over 40 years old is 10%. %about. [0003] At present, COPD mainly relies on drug treatment, and anticholinergic drugs are used to specifically block M receptors, causing airway smooth muscle relaxation, airway relaxation and mucus secretion reduction, thereby reducing airway obstruction and relieving symptoms of COPD patients. Therapeutic ablation (Targeted Lung Denervatiom, TLD) lung denervation therapy ablation targets the parasympathetic nerve, blocking its innervation, so as to achieve permanent anticholinergic e...

AI Technical Summary

Problems solved by technology

[0007] The inventors found that in the related art, most of the loop catheters are electrophysiological mapping catheters, and most of the ablation catheters are unipolar ablation, so multiple ablations are required during the treatment process, so that the ablation forms a closed loop, and the operation process is cumbersome and complicated. Treatment effect is difficult to control

If the degree of ablation is insufficient, the ablation point is not easy to form a closed loop, and it is difficult to effectively block; if the degree of ablation is too high, the damage is too great, which is not good for the patient's recovery process

[0008] At the same time, the internal lumen diameter of the breathing circuit will gradually become smaller with the deepening of the intervention, while the shape of the ablation electrode in the related technology is relatively fixed, which is not well adaptable to the target tissues of different arrangements, and the ablation position is prone to be too high, resulting in excessive ablation. More nerve inactivation, greater impact on patients

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