CN112137675A - Left ventricle plugging device and using method - Google Patents

Abstract

In order to solve the problem that the left atrial appendage occluder is not tightly occluded in the prior art, the present invention proposes a left ventricular occluder and a method for using it, comprising: a occlusion disc, a connecting part and a fixed disc; wherein, the occlusion disc It is used to block the mouth of the left atrial appendage; the fixed disk is connected to the inner wall of the left atrial appendage, and the blocking disk is fixed on the mouth of the left atrial appendage; the connecting part is arranged between the fixed disk and the blocking disk, and is used to The fixing disc and the blocking disc are connected as a whole; the outer ring of the blocking disc is provided with a suction cup part for adsorbing the mouth of the left atrial appendage, which is used to fix the blocking disc on the mouth of the left atrial appendage to prevent residual leakage Small. The invention solves the problem that the left atrial appendage occluder in the prior art is not tightly occluded, and has the advantages of simple structure and good occlusion effect.

Description

A left ventricular occluder and method of use

technical field

The invention relates to the technical field of left atrial appendage occlusion, in particular to a left ventricular occluder and a method for using the same.

Background technique

Atrial fibrillation (AF) is one of the most common clinical arrhythmias, and there are currently about 8 million patients with atrial fibrillation in China. The main hazard of atrial fibrillation is the accumulation of blood in the atrium, which is easy to form thrombus. After the thrombus falls off, it can lead to complications such as stroke and peripheral vascular embolism, which significantly increases the morbidity and mortality. Stroke is the most common and most dangerous complication of atrial fibrillation. Anticoagulation therapy is currently the standard method to prevent stroke complications in atrial fibrillation. However, anticoagulation therapy has limitations such as high bleeding risk and poor medication compliance. Therefore, it is of great significance to find more effective and safe measures to prevent atrial fibrillation and stroke. Studies have shown that in atrial fibrillation, 60% of patients with rheumatic heart disease atrial fibrillation have cardiogenic thrombus from the left atrial appendage, and more than 90% of patients with non-valvular atrial fibrillation have thrombosis in the left atrial appendage. Therefore, intervention in the left atrial appendage to prevent thromboembolism in patients with atrial fibrillation, especially stroke, has important theoretical basis and clinical significance. The left atrial appendage occluder can prevent atrial fibrillation and stroke, and is suitable for patients with atrial fibrillation who are at high risk of stroke, contraindicated in anticoagulation, high bleeding risk, or unwilling to take anticoagulants for a long time.

The left atrial appendage is the remnant of the original left atrium during the embryonic period. It has a narrow, long and curved shape. There are abundant pectoral muscles inside to form trabeculae. The gaps between the pectoral muscles form many holes, and the internal structure is very complex. Clinically, there are generally four main LAA shapes, namely "chicken wing-like", "cactus-like", "wind vane-like" and "cauliflower-like". In addition to these four main LAA shapes, there are very few LAA shapes with multi-chamber bottoms that are encountered clinically. The size, shape, and internal structure of the left atrial appendage vary greatly among individuals, which brings great challenges to the design of the left atrial appendage occluder.

At present, the left atrial appendage occluder on the market is mainly divided into two types: inner plug and outer occlusion. Internal plugging of the left atrial appendage occluder refers to inserting a device into the left atrial appendage to block the left atrial appendage, and external blocking refers to the occlusion disc covering the mouth of the left atrial appendage to block the left atrial appendage.

Many left atrial appendage occluders have the main limitations: when the instrument is inserted into the left atrial appendage, because the shape of the left atrial appendage is very irregular and the deformability of the instrument is limited, it cannot completely block the left atrial appendage orifice, and there are residual leakage occurs.

SUMMARY OF THE INVENTION

In order to solve the problem that the left atrial appendage occluder is not tightly occluded in the prior art, the present invention provides a left ventricular occluder and a method for using it, which can effectively solve the above technical problems.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a left ventricular occluder, which is characterized in that: comprising:

The occluding disc is used to block the mouth of the left atrial appendage;

The fixing plate is connected with the inner wall of the left atrial appendage, and the blocking plate is fixed at the mouth of the left atrial appendage;

a connecting part, arranged between the fixed disk and the blocking disk, and used for connecting the fixed disk and the blocking disk as a whole;

The outer ring of the blocking disc is provided with a suction cup part for adsorbing the mouth of the left atrial appendage, and is used for fixing the blocking disc on the mouth of the left atrial appendage to prevent small residual leakage.

The fixed plate includes:

The fixed part is detachably connected with the connecting part;

a hook portion, disposed at one end of the fixing portion away from the connecting portion;

The hook portion is used for connecting with the inner side wall of the left atrial appendage to prevent the blocking disc from being loosely blocked.

The hook portion includes:

The extension rod is bent towards the medial wall of the left atrial appendage;

The anti-releasing hook is arranged at the end of the extension rod away from the connecting part, and is used for contacting with the inner wall of the left atrial appendage and preventing slipping.

The anti-decoupling is a bulge or a diamond-shaped frame facing the inner wall of the left atrial appendage.

The hook portion includes:

The extension rod is bent towards the medial wall of the left atrial appendage;

The anti-decoupling is arranged at the end of the extension rod away from the connecting part, and is used for contacting with the inner wall of the left atrial appendage to prevent the blocking disc from being loosely blocked;

The tensioning mechanism is arranged on the extension rod, and is used for providing the extension rod with a force to move in the direction of the inner wall of the left atrial appendage.

The tensioning mechanism includes:

a tension rod, one end is hinged with the extension rod, and the other end is arranged through the blocking disc;

An adjustment bolt is connected to the end of the tension rod passing through the blocking disc.

A method of using a left ventricular occluder, comprising:

Putting the fixed disk into the left atrial appendage, and using the self-expansion property of the fixed disk to contact the inner wall of the left atrial appendage;

The fixing disc is in contact with the inner wall of the left atrial appendage to prevent slippage, and the sealing disc is fixed at the mouth of the left atrial appendage to play a blocking role; the suction cup is used to closely contact the tissue of the mouth of the left atrial appendage to prevent residual leakage. Small.

The beneficial effects of the present invention are as follows: in the present invention, a suction cup part for adsorbing the mouth of the left atrial appendage is arranged on the outer ring of the blocking disk, and the blocking disk is fixed on the mouth of the left atrial appendage, thereby preventing small residual leakage; further , Use the tensioning mechanism to firmly fix the blocking disc in the left atrial appendage to prevent loosening. The invention solves the problem that the left atrial appendage occluder in the prior art is not tightly occluded, and has the advantages of simple structure and good occlusion effect.

Description of drawings

FIG. 1 is an embodiment of the present invention.

FIG. 2 is an enlarged view of E in FIG. 1 .

FIG. 3 is an embodiment at F in FIG. 1 .

FIG. 4 is another embodiment at F in FIG. 1 .

FIG. 5 is another embodiment of the present invention.

FIG. 6 is a left side view of FIG. 5 .

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

Embodiment 1: As shown in Figures 1 to 4, a left ventricular occluder includes: a blocking disc 1, a connecting portion 2 and a fixing disc 3; wherein, the blocking disc 1 is used to block the left atrial appendage orifice The fixed disc 3 is connected with the left atrial appendage inner wall, and the blocking disc 1 is fixed at the mouth of the left atrial appendage; 3 is connected with the blocking disk 1 as a whole; the outer ring of the blocking disk 1 is provided with a suction cup part 4 for adsorbing the mouth of the left atrial appendage, for fixing the blocking disk 1 on the mouth of the left atrial appendage to prevent Small residual leakage.

It should be clarified that the suction cup part 4 can preferentially use medical rubber, which is relatively soft and is not prone to rejection reactions. At the same time, because the structure of the suction cup part 4 is very easy to absorb with the tissue of the mouth of the left atrial appendage, the occlusion disk 1 is prevented from being sucked tightly.

The fixing plate 3 includes: a fixing portion 301 and a hook portion 302; wherein, the fixing portion 301 is detachably connected with the connecting portion 2; The hook portion 302 is used to connect with the inner side wall of the left atrial appendage, so as to prevent the blocking disc 1 from being loosely blocked.

Preferably, the fixing plate 3 uses a self-expanding nickel-titanium alloy frame as a stent, and the stent is covered with a film.

The hook portion 302 includes: an extension rod 3021 and an anti-detachment hook 3022;

Wherein, the extension rod 3021 is bent toward the inner side wall of the left atrial appendage; the anti-detachment hook 3022 is provided at the end of the extension rod 3021 away from the connecting part 2, for contacting with the inner side wall of the left atrial appendage and preventing slipping; preferably, the anti-detachment hook 3022 It is a bulge or diamond-shaped frame facing the inner wall of the left atrial appendage.

The connecting part 2 includes a spring 201, a flexible rod 202 and a nut 203; wherein, one end of the flexible rod 202 is connected to the fixing part 301, and the other end passes through the blocking disk 1 and is fixed on the blocking disk 1 through the nut 203. Through the joint action of the nut 203, the extension rod 3021 and the spring 201, the distance between the fixed disk 3 and the blocking disk 1 can be adjusted within a certain range, so that the hook portion 302 can be firmly connected to the tissue of the inner wall of the left atrial appendage.

Specific embodiment II: as shown in Figures 5-6, the hook portion 302 includes: an extension rod 3021, an anti-releasing hook 3022 and a tensioning mechanism; wherein, the extension rod 3021 is bent toward the inner wall of the left atrial appendage;

The anti-detachment hook 3022 is arranged on the end of the extension rod 3021 away from the connecting part 2, and is used for contacting the inner wall of the left atrial appendage to prevent the blocking disc 1 from being loosely blocked; the tensioning mechanism is arranged on the extension rod 3021. , which is used to provide the extension rod 3021 with a force to move in the direction of the inner wall of the left atrial appendage.

The tensioning mechanism includes: a tensioning rod 3023 and an adjustment bolt 3024; wherein, one end of the tensioning rod 3023 is hinged with the extension rod 3021, and the other end is set through the blocking plate 1; The end of the tension rod 3023 of the blocking disc 1 is connected, and by adjusting the length of the tension rod 3023, the contact angle between the extension rod 3021 and the inner wall of the left atrial appendage is adjusted, and then the hook portion 302 is raised. Hold on tight.

When using the occluder described in specific embodiments I and II, it includes:

The fixed disk 3 is put into the left atrial appendage, and the self-expansion property of the fixed disk 3 is utilized to contact the inner wall of the left atrial appendage;

Through the contact between the fixing plate 3 and the inner wall of the left atrial appendage and preventing slippage, the sealing plate 1 is fixed at the mouth of the left atrial appendage, and the function of sealing is achieved.

The suction cup part 4 is in close contact with the tissue at the mouth of the left atrial appendage to prevent small residual leakage.

It needs to be clarified that the technologies not described in this paper are all existing technologies.

It should be clarified that the directional descriptions described in this article are all based on FIG. 1 or FIG. 5 .

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily change or replace them, all belonging to the scope of the present invention. within the protection scope of the present invention. Therefore, the protection scope of the present invention is described in accordance with the protection scope of the claims.

Claims (8)

1. a left ventricular occluder, is characterized in that: comprise: The occluding disc is used to block the mouth of the left atrial appendage; The fixing plate is connected with the inner wall of the left atrial appendage, and the blocking plate is fixed at the mouth of the left atrial appendage; a connecting part, arranged between the fixed disk and the blocking disk, and used for connecting the fixed disk and the blocking disk as a whole; The outer ring of the blocking disc is provided with a suction cup part for adsorbing the mouth of the left atrial appendage, and is used for fixing the blocking disc on the mouth of the left atrial appendage to prevent small residual leakage. 2. The left ventricular occluder according to claim 1, wherein the fixed disc comprises: The fixed part is detachably connected with the connecting part; a hook portion, disposed at one end of the fixing portion away from the connecting portion; The hook portion is used for connecting with the inner side wall of the left atrial appendage to prevent the blocking disc from being loosely blocked. 3. The left ventricular occluder according to claim 2, wherein the hook portion comprises: The extension rod is bent towards the medial wall of the left atrial appendage; The anti-releasing hook is arranged at the end of the extension rod away from the connecting part, and is used for contacting with the inner wall of the left atrial appendage and preventing slipping. 4 . The left ventricular occluder according to claim 3 , wherein the anti-decoupling hook is a bulge or a diamond-shaped frame facing the inner wall of the left atrial appendage. 5 . 5. The left ventricular occluder according to claim 2, wherein the hook portion comprises: The extension rod is bent towards the medial wall of the left atrial appendage; The anti-decoupling is arranged at the end of the extension rod away from the connecting part, and is used for contacting with the inner wall of the left atrial appendage to prevent the blocking disc from being loosely blocked; The tensioning mechanism is arranged on the extension rod, and is used for providing the extension rod with a force to move in the direction of the inner wall of the left atrial appendage. 6. The left ventricular occluder according to claim 5, wherein the tensioning mechanism comprises: a tension rod, one end is hinged with the extension rod, and the other end is arranged through the blocking disc; An adjustment bolt is connected to the end of the tension rod passing through the blocking disc. 7 . The left ventricular occluder according to claim 5 , wherein the hook portion is covered with an extension rod as a skeleton. 8 . 8. The use method of a left ventricular occluder according to claim 1, characterized in that, comprising: Putting the fixed disk into the left atrial appendage, and using the self-expansion property of the fixed disk to contact the inner wall of the left atrial appendage; Through the contact between the fixing disc and the inner wall of the left atrial appendage and preventing slippage, the sealing disc is fixed at the mouth of the left atrial appendage, and the sealing effect is achieved. The suction cup part is in close contact with the tissue of the mouth of the left atrial appendage to prevent small residual leakage.

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