Ablation catheter device for circumferential pulmonary vein ablation

Abstract

The invention relates to medical instruments, in particular to an ablation catheter device for circumferential pulmonary vein ablation. An existing multi-electrode ablation catheter is poor in single-time ablation effect, needs to be matched with three-dimensional mapping to guide multi-time rotating ablation, and is troublesome in operation. The invention provides an ablation catheter device for circumferential pulmonary vein ablation which comprises a sheathing canal internally provided with a containing cavity and an electric ablation catheter arranged at the front end of the sheathing canal, the rear end of the sheathing canal is connected with a handle, the electric ablation catheter is a tube bundle composed of a plurality of electrode tubes capable of being elastically opened, each electrode tube comprises an insulating tube, a positive electrode and a negative electrode, the electrode tube is bent into a convex arc shape and is encircled into a sphere, the front end of the tube bundle is connected with a mapping stimulation catheter with an annular catheter, a stimulation electrode and a mapping electrode, each electrode is provided with an independent lead, the lead penetrates through the annular catheter, the tube bundle and the sheathing canal to be connected with the handle, and the rear end of the handle can be connected with an electric pulse generator and an electrophysiological stimulator. According to the invention, the pulmonary vein orifice is blocked through one-time ablation, no ablation dead zone is left, the recurrence rate is low, and the device is accurate, safe and effective when being used for treating atrial fibrillation.

Description

technical field [0001] The invention relates to a medical device, in particular to a circumpulmonary vein ablation catheter device. Background technique [0002] Minimally invasive ablation is often used to treat atrioventricular (node) reentry tachycardia, atrial flutter, atrial fibrillation tachyarrhythmia, atrial premature beats, and atrial and ventricular premature beats. The principle of ablation is to necrosis the myocardial tissue that induces and maintains arrhythmia through mechanical, physical, chemical and other methods, and forms a transmural and continuous permanent necrotic zone in the relevant myocardial tissue to be replaced by non-electrically active fibrous tissue. At present, radiofrequency current energy is commonly used for ablation. The electrode at the tip of the ablation catheter releases low-voltage high-frequency (30kHz-1.5MHz) radiofrequency energy. The temperature between 42°C and 50°C causes dehydration, denaturation, and necrosis of specific lo...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are aimed at the limited one-time ablation damage of the existing multi-electrode ablation catheter to the pulmonary vein ostium and the vestibule during myocardial ablation. For problems such as ablation and troublesome operation, the present invention provides a circumpulmonary vein ablation catheter device. The ablation catheter can thoroughly ablate the pulmonary vein ostium and the vestibule at one time, completely block the pulmonary vein ostium without leaving an ablation dead zone, and greatly reduce recurrence rate; further, the present invention can also detect and feed back cardiac electrophysiological signals during ablation, making the treatment of atrial fibrillation more accurate, safe and effective

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