Heart electric pulse partition balloon catheter device

Abstract

The invention relates to a heart electric pulse zoning balloon catheter device which comprises a pipeline, the pipeline is composed of an inner tube and an outer tube which are of a nested structure, the device further comprises an ablation component, the ablation component is arranged at the far end of the pipeline, a main body of the ablation component is an expandable spherical balloon body, and the balloon body is provided with a balloon opening. The expandable spherical bag body is connected with the far end of the outer tube in a sealed mode, a flexible circuit is distributed on the outer surface of the expandable spherical bag body in the circumferential direction, the small bag is located at the front end of the expandable spherical bag body, the small bag and the expandable spherical bag body are arranged in an integrated mode or a split mode, and the flexible circuit is connected with the expandable spherical bag body in a sealed mode. And the shape and the size of the small balloon are matched with those of a cavity of an ablation part. The device has the advantages of being reasonable in structural design, easy to position and maintain the posture of a working part, capable of guaranteeing the ablation intensity and the ablation area and capable of being well attached to heart inner wall tissue and blood vessels.

Description

technical field [0001] The invention relates to a medical instrument, belonging to the technical field of pulse ablation surgery, in particular to a cardiac electrical pulse partition balloon catheter device. Background technique [0002] Radiofrequency (RF) ablation and cryoablation are two commonly used clinical methods for the treatment of arrhythmias such as severe atrial fibrillation. The success of ablation mainly depends on whether the ablation scope is continuous and sufficient. The damage must be sufficient to destroy the arrhythmogenic tissue or adequately interfere or isolate abnormal electrical conduction within the myocardial tissue. Excessive ablation, however, will have an impact on surrounding healthy tissue as well as neural tissue. Radiofrequency ablation can reach all cardiac anatomical structures, and is suitable for atrial fibrillation, atrial flutter, atrial tachycardia, premature ventricular tachycardia, ventricular tachycardia and other arrhythmias ...

AI Technical Summary

Problems solved by technology

[0005] This patent has the following disadvantages: 1. The expandable cover film 52 is encapsulated in the cover film 50. When it is in a collapsed state, its diameter is relatively large, and it is difficult to enter the larger Thin organs and additional damage when entering and exiting the patient's organs

2. The electrodes on the balloon are bonded to the surface of the balloon. During the inflation process of the balloon, deformation and uneven spacing will occur, which will affect the effect of ablation

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

4. Because of its spherical structure, positioning is difficult, and it is also difficult to adjust the posture of the balloon, so it is difficult to fit the organ to be ablated during the actual operation, resulting in poor ablation effect

5. 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

3. In order to ensure the ablation effect, the electrode will be relatively large. At this time, the diameter of the contracted state is also relatively thick. It is troublesome to intervene in the human body, and even cause injury

It also has the following disadvantages or deficiencies: 1. The working part of the electrode is relatively narrow, the ablation area and strength are limited, and a better ablation effect cannot be achieved, and the effective utilization rate of the entire device is low

2. It is difficult to effectively fit the curved surface tissue such as the posterior wall of the left atrium, let alone the circular vascular tissue such as the vena cava. The petal-shaped structure and the cylindrical electrode design will be affected in the practical state, further reducing the Ablation effect

3. There is basically no support between the electrodes. During the expansion process, deformation and uneven spacing will occur, which will affect the ablation effect

However, the widths of the flexible electrode and the flexible substrate in this existing solution are constant, and the electrode width must be kept wider (≥1mm), so the flexible substrate needs to be wider, and the catheter needs to pass through a narrow sheath tube (generally, the diameter of the sheath tube is ≤15F, 5mm), then the number of circumferential electrodes will be severely limited when designing a catheter with a larger diameter (≥20mm) balloon, and because the flexible base material and the outer surface of the balloon are Adhesive fixation, but also reserve space for the glue to bond the balloon pins, further restricting the flexible base material on the outer surface of the balloon and the number of electrodes in the circumferential direction, resulting in the ablation area being uneven in the circumferential direction due to insufficient circumferential electrodes. Continuous, which affects the success rate of ablation and increases the number of ablation times and operation difficulty

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