Anti-falling left auricle plugging device

Abstract

The utility model relates to the technical field of left atrial appendage occluders, in particular to an anti-falling left atrial appendage occluder which comprises an arc-shaped occluding sleeve and a nickel-titanium wire fixedly connected with the occluding sleeve, the outer side of the occluding sleeve is fixedly connected with a plurality of positioning needles with the same size, the positioning needles are evenly arranged, and the nickel-titanium wire is fixedly connected with the outer side of the occluding sleeve. The outer side of the positioning needle is wound with sterile fiber cloth, the sterile fiber cloth is fixedly connected with the positioning needle, the positioning needle is arranged in the shape of a circular truncated cone with one narrow end and one wide end, and the relatively narrow end of the positioning needle is fixedly connected with an arc-shaped block. When the plugging sleeve is unfolded, the positioning needle can be driven to pierce towards the inner wall of the left auricle, the sterile fiber cloth is attached to the blood of the left auricle under the action of the positioning needle and finally adheres to the blood of the left auricle, and therefore falling prevention is achieved, and the left auricle plugging device can not easily fall off after positioning is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of left atrial appendage occluders, in particular to an anti-falling left atrial appendage occluder. Background Art

[0002] Left atrial appendage occlusion is a new treatment trend for preventing stroke in patients with atrial fibrillation. It can effectively reduce the mortality and disability rates of patients, and at the same time reduce the occurrence of bleeding complications. In patients with atrial fibrillation, more than 90% of thrombi are closely related to the left atrial appendage. The left atrial appendage occluder blocks the left atrial appendage to prevent the detachment of thrombi in the left atrial appendage during atrial fibrillation, thereby reducing the risk of long-term disability and death caused by thromboembolism in patients with atrial fibrillation. When the occluder is placed in the left atrial appendage of the human body by catheter intervention, due to the complex anatomical structure of the left atrial appendage of the human body, the device is required to reach the predetermined position accurately, and at the same time, it must be well adapted to the anatomical structure, mechanical requirements and hemodynamic requirements of the predetermined position, and the structure of the device must be well designed. The design is to cause only minor trauma to the human body. First, a puncture is made in the skin near the blood vessel, and a guide wire enters the blood vessel from the puncture port. Under the guidance of the guide wire, one end of the catheter reaches the predetermined position, and the other end remains outside the body. Then the occluder is delivered to the predetermined position using the catheter and a pusher. When performing this type of operation, a very small and flexible catheter is required. At the same time, the catheter and guide wire should be designed to have good visualization under X-rays. Once the catheter reaches the predetermined position, the guide wire is removed, and the occluder is guided to the end of the catheter through the channel established by the catheter using the pusher. When the occluder is completely exposed from the end of the catheter, the occluder should be disconnected from the pusher to release the device. After release, the occluder is positioned in an umbrella shape on the inner side of the left atrial appendage.

[0003] A nickel-titanium wire is set on the inner side of the occluding sleeve in a clamping manner, and the umbrella-shaped occluding sleeve fits the left atrial appendage. After a period of time after the operation, the endocardium will cover the occluder, thereby avoiding the formation of blood clots. However, since the left atrial appendage occluder is used on the inside of the human body, if it is accidentally detached, it will cause great harm to the human body. Therefore, to address the above problem, an anti-detachment left atrial appendage occluder is proposed. Utility Model Content

[0004] The purpose of the present invention is to provide an anti-falling left atrial appendage occluder to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A left atrial appendage occluder that prevents detachment comprises an arc-shaped occluding sleeve and a nickel-titanium wire fixedly connected to the occluding sleeve. A plurality of positioning needles of equal size are fixedly connected to the outer side of the occluding sleeve. The positioning needles are evenly arranged and the outer side of the positioning needles is wrapped with sterile fiber cloth, which is fixedly connected to the positioning needles.

[0007] Preferably, the positioning pin is arranged in the shape of a cone with one end being narrow and the other end being wide, and the relatively narrow end of the positioning pin is fixedly connected to an arc-shaped block.

[0008] Preferably, a bottom guide through-hole is provided at one end of the positioning needle that is in contact with the blocking sleeve, and the sterile fiber cloth passes through the bottom guide through-hole.

[0009] Preferably, a top guide through-hole is formed at one end of the positioning needle away from the blocking sleeve, and the sterile fiber cloth passes through the top guide through-hole.

[0010] Preferably, a positioning hole with an equal diameter is opened on the inner side of the positioning needle, and the sterile fiber cloth passes through the positioning hole.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] In the utility model, the structure composed of the positioning needle and the sterile fiber cloth is provided. When the occluding sleeve is unfolded, the positioning needle will be driven to pierce the inner wall of the left atrial appendage. Under the action of the positioning needle, the sterile fiber cloth will fit with the flesh and blood of the left atrial appendage and finally stick together, thereby achieving anti-falloff, making it difficult for the left atrial appendage occluder to fall off after positioning is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 Schematic diagram of the structure at A;

[0015] Figure 3 This is a schematic diagram of the positioning needle structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the half-section structure of the sterile fiber cloth of the utility model.

[0017] In the figure: 1. Sealing sleeve; 2. Nickel-titanium wire; 3. Positioning needle; 4. Bottom guide perforation; 5. Positioning hole; 6. Arc block; 7. Sterile fiber cloth; 8. Top guide perforation. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0021] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0022] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0023] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0024] See also Figure 1-4 , the utility model provides a technical solution:

[0025] A left atrial appendage occluder that prevents falling off comprises an arc-shaped occluding sleeve 1 and a nickel-titanium wire 2 fixedly connected to the occluding sleeve 1. A plurality of positioning needles 3 of equal size are fixedly connected to the outside of the occluding sleeve 1. The positioning needles 3 are evenly arranged. Sterile fiber cloth 7 is wrapped around the outside of the positioning needles 3, and the sterile fiber cloth 7 is fixedly connected to the positioning needles 3.

[0026] The positioning needle 3 is set in the form of a cone with one end narrow and the other end wide. The relatively narrow end of the positioning needle 3 is fixedly connected to an arc block 6. This setting increases the comfort of the positioning needle 3 piercing the inner wall of the left atrial appendage through the arc block 6; the end of the positioning needle 3 that is in contact with the blocking sleeve 1 is provided with a bottom guide perforation 4, and the sterile fiber cloth 7 passes through the bottom guide perforation 4. This setting allows the sterile fiber cloth 7 to be stably positioned at the bottom of the positioning needle 3 through the bottom guide perforation 4; the end of the positioning needle 3 away from the blocking sleeve 1 is provided with a top guide perforation 8, and the sterile fiber cloth 7 passes through the top guide perforation 8. This setting allows the sterile fiber cloth 7 to be stably positioned at the top of the positioning needle 3 through the top guide perforation 8; a positioning hole 5 of equal aperture is provided on the inner side of the positioning needle 3, and the sterile fiber cloth 7 passes through the positioning hole 5. This setting allows the sterile fiber cloth 7 to be stably positioned on the positioning needle 3 through the positioning hole 5.

[0027] Workflow: When the sterile fiber cloth 7 is fixedly wrapped around the outside of the positioning needle 3, the sterile fiber cloth 7 is first passed through the bottom guide perforation 4, then wrapped around the outside of the positioning needle 3 in order, then passed through all the positioning holes 5, and finally passed through the top guide perforation 8, so that the sterile fiber cloth 7 is stably positioned on the outside of the occluding sleeve 1. When the occluding sleeve 1 and the nickel-titanium wire 2 are removed from the catheter and then unfolded, the occluding sleeve 1 will drive the positioning needle 3 to pierce the inner wall of the left atrial appendage, and the arc-shaped block 6 acts on the inner wall of the left atrial appendage. Under the action of the positioning needle 3, the sterile fiber cloth 7 fits into the flesh and blood of the left atrial appendage, and finally sticks together, thereby achieving anti-falloff, so that the left atrial appendage occluder is not easy to fall off after the positioning is completed.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-dropout left atrial appendage occluder, comprising an arc-shaped occluding sleeve (1) and a nickel-titanium wire (2) fixedly connected to the occluding sleeve (1), characterized in that: A plurality of positioning needles (3) of equal size are fixedly connected to the outside of the blocking sleeve (1), and the positioning needles (3) are evenly arranged. Sterile fiber cloth (7) is wrapped around the outside of the positioning needles (3), and the sterile fiber cloth (7) is fixedly connected to the positioning needles (3).

2. The anti-dropout left atrial appendage occluder according to claim 1, characterized in that: The positioning needle (3) is arranged in the form of a truncated cone with one end being narrow and the other end being wide. The relatively narrow end of the positioning needle (3) is fixedly connected to an arc-shaped block (6).

3. The anti-dropout left atrial appendage occluder according to claim 1, characterized in that: A bottom guide through-hole (4) is provided at one end of the positioning needle (3) that is in contact with the blocking sleeve (1), and the sterile fiber cloth (7) passes through the bottom guide through-hole (4).

4. The anti-dropout left atrial appendage occluder according to claim 1, characterized in that: A top guide perforation (8) is provided at one end of the positioning needle (3) away from the blocking sleeve (1), and the sterile fiber cloth (7) passes through the top guide perforation (8).

5. The anti-dropout left atrial appendage occluder according to claim 1, characterized in that: A positioning hole (5) with an equal diameter is provided on the inner side of the positioning needle (3), and the sterile fiber cloth (7) passes through the positioning hole (5).

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