A heart occluder

Abstract

This invention belongs to the field of medical device technology, and in particular to a cardiac occluder, comprising an occluder plug and a fixation seat. A biofilm is fixed to the outer surface of the occluder plug. A fixation seat is fixed at the center of one side of the occluder plug. Several fixing blocks are fixed around the outer perimeter of the fixation seat. Several support rods are arranged around the outer perimeter of the fixation seat on one side of the occluder plug. The support rods are elastically connected to the fixing blocks by springs. The support rods are rotatably connected to the occluder plug by a rotating shaft. A connecting seat is fixed at the center of one side of the fixation seat. The connecting seat includes a connecting plate and a connecting column. The connecting plate and the connecting column are fixedly connected. The support rods facilitate the compression and fixation between the inserted occluder and the left atrial appendage, ensuring stable and firm fixation that is not easily dislodged. The connecting column and connecting plate enable dual fixation of the delivery sheath through both locking and screwing methods, resulting in a stable and firm connection that is easy to install and remove. The occlusion effect is good, and the occlusion capacity is strong.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a cardiac occluder. Background Technology

[0002] Atrial fibrillation (AF) is the most common type of arrhythmia in clinical practice. The most significant danger of AF is the formation of thrombi in the left atrium. Once thrombi detach, they can trigger complications such as acute myocardial infarction, stroke, and peripheral vascular embolism, increasing disability and mortality rates. Currently, over 90% of thrombi in non-valvular AF patients originate from the left atrial appendage. Therefore, closing or occluding the left atrial appendage can significantly reduce thrombus formation and thromboembolic complications. The left atrial appendage is the anterior, right-lateral part of the left atrium. This part has no clear boundary with the main atrium; the atrial wall is smooth, while the inner wall of the atrial appendage is not smooth due to its well-developed pectinate muscles. In recent years, minimally invasive left atrial appendage occlusion has emerged. However, due to the varying anatomical morphology of the left atrial appendage, it is prone to residual blood during and after the procedure, failing to achieve the desired occlusion effect. Furthermore, the occluder is not always securely fixed and is prone to detachment, increasing the complexity of the procedure. Therefore, how to better occlude the left atrial appendage has become an urgent problem to be solved in the medical field.

[0003] The structure of a cardiac occluder mainly includes a front-end occlusion structure and a rear-end fixation structure. Currently, cardiac occluders still have the following problems in use: the size and shape of the left atrial appendage vary, making it difficult to insert the occluder into the cavity inside the left atrial appendage; the occluder lacks a good external support structure, and the occluder is only fixed to the left atrial appendage by the relative pressure applied by the left atrial appendage muscle layer, which is not secure enough; the occluder is delivered to the opening of the left atrial appendage through a medical delivery sheath, and the connection between the delivery sheath and the occluder is not stable enough, making it easy for the occluder to fall off during delivery. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a cardiac occluder that is convenient to use and provides stable occlusion.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cardiac occluder, comprising an occluder plug and a fixation seat, wherein a biofilm is fixed to the outer surface of the occluder plug, a fixation seat is fixed at the center of one side of the occluder plug, a plurality of fixing blocks are fixed around the outer periphery of the fixation seat, and a plurality of support rods are provided around the outer periphery of the fixation seat on one side of the occluder plug, the support rods are elastically connected to the fixing blocks by springs, and the support rods are rotatably connected to the occluder plug by a rotating shaft, and a connecting seat is fixed at the center of one side of the fixation seat, the connecting seat comprising a connecting plate and a connecting column, the connecting plate and the connecting column being fixedly connected.

[0006] As a preferred technical solution of the cardiac occluder of the present invention, both the occluder and the biomembrane are arc-shaped structures, both the fixing seat and the connecting seat are circular structures, a locking block is fixed on one side of the connecting plate and the connecting column, and a rotating block is fixed on the other side of the connecting plate and the connecting column. The inner surface of the locking block is provided with a locking groove, and the inner surface of the rotating block is provided with a rotating groove.

[0007] As a preferred technical solution of the cardiac occluder of the present invention, one end of the support rod is a square structure and the other end of the support rod is an arc-shaped structure. The support rods are arranged in a circular array around the outside of the fixing seat. A support block is fixed on one side of the fixing seat. The support block is an arc-shaped structure. Both the support rod and the support block are inclined.

[0008] As a preferred embodiment of the cardiac occluder of the present invention, the locking block and the rotating block are fixed together, and the locking groove and the rotating groove are connected internally.

[0009] As a preferred embodiment of the cardiac occluder of the present invention, one end of the spring is fixedly connected to the support rod, and the other end of the spring is fixedly connected to the fixing block.

[0010] As a preferred embodiment of the cardiac occluder of the present invention, the rotating shaft is fixedly connected to the occluder plug.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: A novel cardiac occluder is designed to occlude the left atrial appendage. It has strong occlusion ability, good sealing effect, stable connection, and firm fixation. The occluder has an arc-shaped occlusion plug at its front end, with a biofilm on its surface. A fixing seat and a connecting seat are located at the center of the tail end of the occluder. Several support rods are connected to the outer periphery of the fixing seat on one side of the occlusion plug via spring elastic connection and rotating shaft. The connecting seat includes a connecting column and a connecting plate. The arc-shaped occlusion plug facilitates smooth insertion of the occluder into the cavity inside the left atrial appendage, making operation simple and convenient. The biofilm increases the sealing between the occluder and the left atrial appendage, resulting in a good seal. The support rods facilitate the compression and fixation between the inserted occluder and the left atrial appendage, ensuring stable and firm fixation and preventing detachment. The connecting column and connecting plate enable dual fixation of the delivery sheath through locking and screwing, ensuring a stable and firm connection and convenient installation and disassembly. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the structure in the contracted state in this invention; Figure 3 This is a schematic diagram of the natural state rear view structure in this invention; Figure 4 for Figure 1 Enlarged structural diagram at point B in the diagram; Figure 5 for Figure 2 Enlarged structural diagram at point C; Figure 6 for Figure 3 Enlarged structural diagram at point D in the diagram; Figure 7 This is a schematic diagram showing the cross-sectional view of the connection between the connecting seat and the internal connection of the conveying sheath A in this invention; Figure 8 This is a schematic diagram of the structure before sealing in this invention; Figure 9 This is a schematic diagram of the sealing structure in this invention; Figure 10 This is a schematic diagram of the structure after sealing in this invention; In the diagram: 1. Sealing plug; 2. Biofilm; 3. Fixing seat; 4. Connecting seat; 5. Support rod; 6. Connecting plate; 7. Connecting column; 8. Rotating shaft; 9. Support block; 10. Spring; 11. Fixing block; 12. Slot; 13. Rotating slot; 14. Slot; 15. Rotating block. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0014] Please see Figure 1-10 The present invention provides the following technical solution: a cardiac occluder, comprising an occluder 1 and a fixation seat 3. A biofilm 2 is fixed on the outer surface of the occluder 1. A fixation seat 3 is fixed at the center of one side of the occluder 1. Several fixing blocks 11 are fixed around the outer periphery of the fixation seat 3. Several support rods 5 are arranged around the outer periphery of the fixation seat 3 on one side of the occluder 1. The support rods 5 are elastically connected to the fixing blocks 11 by springs 10. The support rods 5 are rotatably connected to the occluder 1 by a rotating shaft 8. A connecting seat 4 is fixed at the center of one side of the fixation seat 3. The connecting seat 4 includes a connecting plate 6 and a connecting post 7. The connecting plate 6 and the connecting post 7 are fixedly connected. In this embodiment... Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 and Figure 10The term A in the middle refers to the delivery sheath A. The use of delivery sheath A can be referred to as XC1015 medical delivery sheath A. The arc-shaped sealing plug 1 facilitates the smooth insertion of the occluder into the cavity inside the left atrial appendage, making the operation simple and convenient. The biomembrane 2 increases the sealing between the occluder and the left atrial appendage, resulting in a good seal. The support rod 5 facilitates the compression and fixation between the inserted occluder and the left atrial appendage, ensuring a stable and secure fixation that is not easy to fall off. The connecting column 6 and the connecting plate 7 enable dual fixation of delivery sheath A through locking and screwing, ensuring a stable and secure connection and convenient installation and removal.

[0015] Specifically, both the sealing plug 1 and the biomembrane 2 are arc-shaped structures, while both the fixing seat 3 and the connecting seat 4 are circular structures. A locking block 14 is fixed to one side of both the connecting plate 6 and the connecting column 7, and a rotating block 15 is fixed to the other side of both. The inner surface of the locking block 14 has a locking groove 12, and the inner surface of the rotating block 15 has a rotating groove 13. In this embodiment, the sealing plug 1 is a titanium alloy hemispherical structure, facilitating insertion into the left atrial appendage cavity. The biomembrane 2 is a TPU biofilm, which prevents blood seepage and increases its sealing performance. The fixing seat 3 is a titanium alloy circular structure, used for the elastic support of the strut 5 and the connecting seat 4. The connection is fixed, and the connecting seat 4 is a circular structure of titanium alloy, which is used to connect the conveying sheath A and the sealing plug 1 to facilitate the conveying of the sealing plug 1. The connecting seat 4 includes an outer annular connecting plate 6 and an inner cylindrical connecting column 7. The connecting plate 6 is used for the outer fitting and fixing of the conveying sheath A, and the connecting column 7 is used for the inner fitting and fixing of the conveying sheath A. Both the connecting plate 6 and the connecting column 7 include a front end locking block 14 and a rear end rotating block 15. The locking blocks 14 form a locking groove 12, and the rotating blocks 15 form a rotating groove 13, which facilitates the double fixing of the conveying sheath A by locking and rotating. The connection is stable and easy to install and remove.

[0016] Specifically, one end of the support rod 5 has a square structure, and the other end has an arc-shaped structure. The support rods 5 are arranged in a circular array around the outside of the fixing base 3. A support block 9 is fixed on one side of the fixing base 3. The support block 9 has an arc-shaped structure. Both the support rod 5 and the support block 9 are inclined. In this embodiment, the support rod 5 is made of titanium alloy and the support block 9 is made of PET material, so that the support block 9 fits comfortably with the left atrial appendage. The support rod 5 can be elastically rotated by the spring 10 and the rotating shaft 8. The support rod 5 is subjected to the elastic force of the spring 10 and rotates through the rotating shaft 8. The support rod 5 expands outward, and the muscle layer of the left atrial appendage contracts, applying a certain pressure to the support rod 5, thereby further fixing the sealing plug 1 and preventing the sealing plug 1 from falling out.

[0017] Specifically, the locking block 14 is fixed to the rotating block 15, and the locking groove 12 and the rotating groove 13 are internally connected.

[0018] Specifically, one end of the spring 10 is fixedly connected to the support rod 5, and the other end of the spring 10 is fixedly connected to the fixing block 11. In this embodiment, the fixing block 11 is a titanium alloy cylindrical structure, and the connection surface with the spring 10 is a planar structure, which facilitates the linear extension and retraction of the spring 10. The rotating shaft 8 and the spring 10 are both made of alloy material.

[0019] Specifically, the rotating shaft 8 is fixedly connected to the sealing plug 1.

[0020] The working principle and usage process of this invention: In use, the delivery sheath A is connected to the connecting seat 4 of the occluder. The delivery sheath A is inserted into the slot 12, where it engages with the slot. The delivery sheath A is then rotated further into the rotating groove 13, where it engages with the groove, thus doubly securing the delivery sheath A. The occluder is then delivered to the left atrial appendage through the delivery sheath A along the incision, and then the left atrial appendage is occluded. Figure 8 , Figure 9 and Figure 10 As shown, the occluder 1 enters the cavity inside the left atrial appendage. The left atrial appendage muscle layer contracts, applying a certain pressure to the occluder 1, thereby fixing it in place. Simultaneously, it is sealed by the biomembrane 2 to prevent blood from flowing back into the left atrium. During the insertion of the occluder 1, the support rod 5 is subjected to the elastic force of the spring 10 and rotates through the rotating shaft 8. The support rod 5 expands outward, and the left atrial appendage muscle layer contracts, applying a certain pressure to the support rod 5, thereby further fixing the occluder 1 and preventing it from falling out. After the occlusion is completed, the delivery sheath A is rotated, and the delivery sheath A is unscrewed from the slot 12. The delivery sheath A is pulled out of the slot 12. The delivery sheath A is disassembled by first screwing it in and then pulling it out. The delivery sheath A is installed by first inserting it and then screwing it in.

[0021] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cardiac occluder, characterized in that: The device includes a sealing plug (1) and a fixing seat (3). A biofilm (2) is fixed on the outer surface of the sealing plug (1). A fixing seat (3) is fixed at the center of one side of the sealing plug (1). Several fixing blocks (11) are fixed around the outside of the fixing seat (3). Several support rods (5) are set around the outside of the fixing seat (3) on one side of the sealing plug (1). The support rods (5) are elastically connected to the fixing blocks (11) by springs (10). The support rods (5) are rotatably connected to the sealing plug (1) by a rotating shaft (8). A connecting seat (4) is fixed at the center of one side of the fixing seat (3). The connecting seat (4) includes a connecting plate (6) and a connecting column (7). The connecting plate (6) and the connecting column (7) are fixedly connected. Both the sealing block (1) and the biofilm (2) are arc-shaped structures. Both the fixing seat (3) and the connecting seat (4) are circular structures. One side of the connecting plate (6) and the connecting column (7) is fixed with a locking block (14). The other side of the connecting plate (6) and the connecting column (7) is fixed with a rotating block (15). The inner surface of the locking block (14) is provided with a locking groove (12), and the inner surface of the rotating block (15) is provided with a rotating groove (13). One end of the support rod (5) is a square structure, and the other end of the support rod (5) is an arc-shaped structure. The support rod (5) is arranged in a ring array around the outside of the fixing seat (3). One side of the fixing seat (3) is fixed with a support block (9). The support block (9) is an arc-shaped structure. Both the support rod (5) and the support block (9) are inclined.

2. A cardiac occluder according to claim 1, characterized in that: The locking block (14) is fixed to the rotating block (15), and the locking groove (12) and the rotating groove (13) are connected internally.

3. A cardiac occluder according to claim 1, characterized in that: One end of the spring (10) is fixedly connected to the support rod (5), and the other end of the spring (10) is fixedly connected to the fixing block (11).

4. A cardiac occluder according to claim 1, characterized in that: The rotating shaft (8) is fixedly connected to the sealing plug (1).

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