Radiofrequency ablation catheter for performing pulmonary nerve ablation

Abstract

The invention discloses a radiofrequency ablation catheter for performing pulmonary nerve ablation. The radiofrequency ablation catheter comprises a catheter body, a traction wire penetrates through the catheter body, the far end part of the catheter body is an annular section, the annular section can deform under the action of the traction wire, a deformation restraining sleeve si further fixedlyarranged in the catheter body in a penetrating mode, the traction wire is movably arranged in the deformation restraining sleeve in a penetrating mode, and the far ends of the traction wire and the annular section are relatively fixed; and the deformation restraining sleeve at least extends to the near end side of the annular section from the far end of the catheter body, a rigidity D1, located on the near end side of the annular section, of the deformation restraining sleeve is larger than a rigidity D2, located on the annular section, of the deformation restraining sleeve, a deformation restraining pipe is used for adjusting deformation generated when the catheter body is acted by the traction wire, and the deformation restraining pipe defines a penetrating-guiding channel. According tothe technical scheme, different rigidities are provided at different positions through the deformation restraining pipe, so that the deformation degree of each part is accurately controlled in the far-end part deformation process, a basis is provided for a stable and reliable treatment process and treatment effect, and the operation feeling is improved.

Description

technical field [0001] The present application relates to the field of medical equipment, in particular to a radiofrequency ablation catheter 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. 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 effect. This method has completed a feasibility cli...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing technology, the remote control accuracy of the radiofrequency ablation catheter is insufficient, and there is room for improvement

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