Ablation catheter device with mapping function

Abstract

The invention relates to an ablation catheter device with a mapping function. The device comprises a handle, a wire, a pulse generation circuit, an operation control device, a metal valve, a first catheter and a flexible circuit, wherein the first catheter is located at the far end of the handle, the far end of the first catheter is movably connected with a second catheter, the second catheter and the first catheter are mutually nested, and a catheter head is arranged at the far end of the second catheter; the metal valve is sheet-shaped, one end of the metal valve is connected with the first catheter, the other end of the metal valve is connected with the second catheter, the flexible catheter comprises a non-conductive base material, and the non-conductive base material is fixed on the outer surface of the metal valve; a conductive layer is fixed on the outer surface of the non-conductive base material; and a non-conductive covering material partially covers the outer surface of the conductive layer, and the non-covered part of the conductive layer forms an electrode. The device has the advantages that the device can be well attached to endocardium tissue, ablation and mapping can be achieved, the ablation range and angle are reasonable, and operation is convenient.

Description

technical field [0001] The invention relates to a medical device, which belongs to the technical field of pulse ablation surgery, in particular to an ablation catheter device with a mapping function. Background technique [0002] Radiofrequency (RF) ablation and cryoablation are two commonly used clinical methods for the treatment of severe arrhythmias such as atrial fibrillation. The success of ablation mainly depends on whether the ablation range is continuous and sufficient. The injury must be sufficient to destroy the arrhythmogenic tissue or to sufficiently disrupt or isolate abnormal electrical conduction within the myocardial tissue. But excessive ablation will have an impact on surrounding healthy tissue and nerve tissue. Radiofrequency ablation can reach all cardiac anatomical locations, and is suitable for arrhythmias including atrial fibrillation, atrial flutter, atrial tachycardia, premature ventricular, and ventricular tachycardia originating from pulmonary ve...

AI Technical Summary

Problems solved by technology

That is, because the wire cannot be directly inserted into human tissue, the wire is covered with an expandable cover, and the electrode part is leaked to perform pulse ablation operation, but it has the following disadvantages: 1. The electrode on the balloon is bonded on the surface of the balloon. During the balloon inflation process, there will be deformation and uneven spacing, which will affect the effect of ablation

2. The shape of the balloon and the position of the electrodes are not effective in eliminating thrombus caused by atrial fibrillation

3. Glue is used to connect the balloon and the annular gap of the expandable cover. Since the balloon needs to be folded and inflated and there is a certain pressure, in this case, the glue is prone to fall off, glue leakage, and seam leakage.

However, in the actual use process, it is difficult to control the position of the shape during the switching process of this technology in the body. The rigidity of its material and structure is poor, and the orientation and angle of the electrode cannot be guaranteed. It is necessary to rotate the angle multiple times, and perform multiple ablation in a tentative manner to avoid incomplete ablation and omission of ablation

In addition, this technology also has the following disadvantages: 1. During the operation, due to the complex situation in the heart and blood vessels, the state of several electrodes formed by this technology is uncertain, and it is difficult to perform effective and precise ablation, so it can only be rotated repeatedly Change the angle and position, so the effect of ablation is greatly reduced

2. Due to the continuous contraction and relaxation of the heart, the related large blood vessels are also constantly beating due to the influx of blood. The surface tissue cannot effectively adapt to the circular vascular tissue such as the vena cava. The petal structure and the cylindrical electrode design will be affected in the practical state, further reducing the ablation effect

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