Left auricle plugging device and left auricle plugging system

Abstract

The utility model provides a left auricle plugging device and a left auricle plugging system. The left atrial appendage occluder comprises a fixed disc; a plugging disc; the universal joint assembly is connected with the fixing disc and the plugging disc so that the plugging disc can rotate in a universal mode relative to the fixing disc. The universal joint assembly comprises a limiting piece and a universal joint component, the limiting piece is provided with a containing cavity, a universal structure is arranged at the first end of the universal joint component, the universal structure is movably arranged in the containing cavity, and the universal structure and the limiting piece form a limiting stop. Wherein the limiting piece comprises a plurality of connecting sections, the connecting sections are sequentially welded end to end to define a containing cavity, and clamping structures matched with each other are arranged on the connecting end faces of every two adjacent connecting sections. The left atrial appendage plugging device solves the problem that in the prior art, a left atrial appendage plugging device is poor in applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, specifically, relate to a left auricle plugging device and left auricle plugging system. BACKGROUND

[0002] Atrial fibrillation is a common heart rate disorder symptom, and with the population aging trend, the prevalence of atrial fibrillation will also increase. The treatment of cerebral apoplexy caused by atrial fibrillation generally includes: anticoagulant therapy, surgical closure or resection of left auricle, and interventional occlusion of left auricle.

[0003] The left auricle plugging device on the market is generally divided into single inner plug and inner plug outer cover structure, the structure of single inner plug cannot effectively plug the left auricle mouth in the clinical process, residual leakage occurs, and residual cavity is not easy to endothelialize; the defects of the structure of the inner plug outer cover left auricle plugging device are that in the clinical process, the irregular left auricle will lead to the size of the left auricle plugging device and the left auricle not meeting the requirements, which not only leads to plugging failure, but also causes damage to the pulmonary vein and the mitral valve, and affects endothelialization. In addition, the existing left auricle plugging device product structure is all non-detachable and free assembly product structure, which cannot select the appropriate left auricle product of the patient according to the actual clinical demand, and cannot realize direction adjustment and height adjustment on this basis, greatly affecting the applicability of the left auricle plugging device.

[0004] As known from the above, the applicability of the left auricle plugging device in the prior art is poor. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a left auricle plugging device and a left auricle plugging system, to solve the problem of poor applicability of the left auricle plugging device in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a left auricle plugging device is provided, which comprises: a fixed disc; a plugging disc; a universal joint assembly, the universal joint assembly is connected with the fixed disc and the plugging disc respectively, so that the plugging disc rotates universally relative to the fixed disc; the universal joint assembly comprises a limiting piece and a universal joint component, the limiting piece has a containing cavity, the first end of the universal joint component has a universal structure, the universal structure is movably arranged in the containing cavity and forms a limiting stop with the limiting piece; wherein the limiting piece comprises a plurality of connecting segments, the plurality of connecting segments are sequentially welded at the head and tail to form the containing cavity, and the connecting end faces of the adjacent two connecting segments are provided with matched clamping structures.

[0007] Further, the clamping structure comprises a protruding rib and a groove, one of the protruding rib and the groove is arranged at the connecting end face of one of the adjacent two connecting segments, and the other connecting segment is provided with the other one of the protruding rib and the groove at the corresponding connecting end face.

[0008] Further, the end of the limiting member close to the universal joint member is provided with a radial inwardly extending stopper periphery, the stopper periphery limits the universal structure in the axial direction of the limiting member, the middle part of the stopper periphery is formed with a through hole for avoiding at least part of the universal joint member.

[0009] Further, the universal structure is a ball head structure, the diameter of the through hole is smaller than the diameter of the ball head structure.

[0010] Further, the universal joint member further comprises an intermediate transition part connected with the universal structure in sequence, the intermediate transition part is arranged in the through hole, and the cross-sectional area of the intermediate transition part is smaller than the cross-sectional circular area of the universal structure.

[0011] Further, the intermediate transition part is a waist-shaped structure gradually tapering from both ends to the middle, and the inner edge of the stopper periphery is matched with the shape of the intermediate transition part.

[0012] Further, the second end of the universal joint member has a connecting part, the connecting part is a cylindrical structure, one end of the sealing disc close to the fixing disc extends into the connecting part and is connected and fixed with the connecting part.

[0013] Further, one end of the sealing disc away from the fixing disc is provided with a connecting piece, the connecting piece has a threaded segment, and the threaded segment is used for being screwed with a conveying device of the left atrial appendage occlusion system.

[0014] Further, the fixing disc and / or the sealing disc is provided with at least one flow resistance film.

[0015] According to another aspect of the utility model, a left atrial appendage occlusion system is provided, which comprises the above-mentioned left atrial appendage occluder and a conveying device for conveying the left atrial appendage occluder, and the left atrial appendage occluder is detachably connected with the conveying device.

[0016] The technical scheme of the utility model discloses left auricle plugging ware including fixed disc, plugging disc and universal joint assembly, universal joint assembly is connected with fixed disc and plugging disc respectively to make plugging disc relative to fixed disc universal rotation, universal joint assembly includes stop piece and universal joint component, stop piece has accommodation cavity, and the first end of universal joint component has universal structure, and universal structure is movably arranged in the accommodation cavity and forms limit stop with stop piece, wherein, stop piece includes multiple connecting sections, and multiple connecting sections are sequentially welded to enclose the accommodation cavity, and the connecting end face of adjacent two connecting sections is provided with matched clamping structure, so that the fixed disc and plugging disc are assembled by the connection of universal joint assembly and cannot be disassembled to form integral plugging structure, and the fixed disc and plugging disc of suitable specification can be selected according to clinical actual demand before assembly, further, the plugging disc is relative to the fixed disc universal rotation through the universal connection of universal structure and stop piece, so that the direction and angle are adjusted according to the clinical actual demand, the left auricle plugging ware can be completely adapted to the patient, the applicability of left auricle plugging ware is greatly improved, and the problem of poor applicability of left auricle plugging ware in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain embodiments of the present application and not to limit the present application. In the drawings:

[0018] Figure 1 Fig. 1 shows a structure schematic diagram of the left auricle plugging ware in one specific embodiment of the utility model;

[0019] Figure 2 Fig. 4 shows an exploded view of the universal joint assembly in one specific embodiment of the utility model;

[0020] Figure 3 Fig. 5 shows a structure schematic diagram of the universal joint assembly in one specific embodiment of the utility model;

[0021] Figure 4 Fig. 6 shows a sectional view of the universal joint assembly in one specific embodiment of the utility model.

[0022] Wherein, the above-mentioned drawing includes the following sign:

[0023] 10. Fixed plate; 20. Sealing plate; 21. Steel sleeve; 30. Limiting component; 31. Receiving cavity; 32. Stop perimeter; 33. Connecting section; 34. Raised rib; 35. Groove; 40. Universal joint component; 41. Universal structure; 42. Intermediate transition part; 43. Connecting part; 50. Connecting piece; 60. Flow-blocking membrane. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] To address the poor applicability of existing left atrial appendage occluders, this invention provides a left atrial appendage occluder and a left atrial appendage occlusion system. The left atrial appendage occlusion system described below includes the left atrial appendage occluder described below.

[0029] like Figures 1 to 4 As shown, the left atrial appendage occlusion device includes a fixed plate 10, an occlusion plate 20, and a universal joint assembly. The universal joint assembly is connected to both the fixed plate 10 and the occlusion plate 20, allowing the occlusion plate 20 to rotate universally relative to the fixed plate 10. The universal joint assembly includes a limiting member 30 and a universal joint component 40. The limiting member 30 has a receiving cavity 31, and the first end of the universal joint component 40 has a universal structure 41, which is movably disposed within the receiving cavity 31 and forms a limiting stop with the limiting member 30. The limiting member 30 includes multiple connecting segments 33, which are welded end to end to form the receiving cavity 31. A matching snap-fit ​​structure is provided at the connecting end faces of adjacent connecting segments 33.

[0030] The left atrial appendage occluder comprises a fixing disc 10, an occlusion disc 20 and a universal joint assembly. The universal joint assembly is connected with the fixing disc 10 and the occlusion disc 20 respectively to enable the occlusion disc 20 to rotate universally relative to the fixing disc 10. The universal joint assembly comprises a limiting piece 30 and a universal joint member 40. The limiting piece 30 has a receiving cavity 31. The first end of the universal joint member 40 has a universal structure 41 which is movably arranged in the receiving cavity 31 and forms a limiting stop with the limiting piece 30. The limiting piece 30 comprises a plurality of connecting segments 33 which are sequentially welded to form the receiving cavity 31. The connecting end faces of the adjacent two connecting segments 33 are provided with matched clamping structures. Thus, the fixing disc 10 and the occlusion disc 20 are assembled by the universal joint assembly to form an integral occlusion structure which cannot be disassembled. Before assembly, the fixing disc 10 and the occlusion disc 20 of appropriate specifications can be selected according to the actual clinical needs. Further, the occlusion disc 20 rotates universally relative to the fixing disc 10 through the universal connection of the universal structure 41 and the limiting piece 30. Thus, the direction and angle are adjusted according to the actual clinical needs, so that the left atrial appendage occluder can be fully adapted to the patient, greatly improving the applicability of the left atrial appendage occluder. In addition, the clamping structure is arranged at the welding position of the limiting piece 30, so that the limiting piece 30 can be combined without using tooling, reducing the production cost. When welding, the phenomenon of extrusion or displacement caused by thermal expansion and cold contraction can be avoided due to the matching relationship, improving the service life of the limiting piece 30.

[0031] As shown in Figure 2 , the clamping structure comprises a protruding rib 34 and a groove 35. One of the protruding rib 34 and the groove 35 is arranged at the connecting end face of one of the adjacent two connecting segments 33, and the other of the protruding rib 34 and the groove 35 is arranged at the corresponding connecting end face of the other connecting segment 33. Specifically, in this embodiment, the limiting piece 30 is a cylindrical structure, and the middle part is the receiving cavity 31. The limiting piece 30 comprises two arc-shaped connecting segments 33. One connecting segment 33 has a protruding rib 34 and a groove 35 at both ends, and the other connecting segment 33 has a groove 35 and a protruding rib 34 at both ends, so that the two connecting segments 33 are matched in concave-convex manner, and then welded at the matching position of the connecting end face, as shown in Figure 3 , the dots in Figure 3 are welding points. Further, the number of the protruding rib 34 and the groove 35 at the connecting end face can be one or more, which can be selected according to actual needs.

[0032] In this embodiment, the size of the receiving cavity 31 is slightly larger than the universal structure 41, so that the universal structure 41 can be adjusted in rotation in the receiving cavity 31, and after the universal structure 41 is adjusted to the appropriate direction angle, it plays a limiting stop role for the universal structure, preventing the universal structure 41 from shaking greatly, and ensuring the accuracy and stability of the adjustment.

[0033] As shown in Figure 4 The end of the limiting member 30 close to the universal joint member 40 is provided with a radial inwardly extending stopper periphery 32, which limits the stopper universal structure in the axial direction of the limiting member 30. The middle part of the stopper periphery 32 is formed with a through hole for avoiding at least part of the universal joint member 40. In the embodiment, the end of the limiting member 30 away from the universal joint member 40 is used to connect and fix with the fixed disc 10. The stopper periphery 32 can be understood as being formed by opening a middle through hole at the end of the closed cylindrical limiting member 30 close to the universal joint member 40. The stopper periphery 32 can be a split structure, that is, the stopper periphery 32 is welded and fixed with the end of the limiting member 30 close to the universal joint member 40, or the stopper periphery 32 is an integral structure with the limiting member 30, and the stopper periphery 32 is formed by extending radially inwardly from the end of the limiting member 30 close to the universal joint member 40.

[0034] It can be understood that in the embodiment, when the plurality of connecting segments 33 are sequentially welded to enclose the universal structure 41 in the accommodating cavity 31, the universal structure 41 is limited and stopped by the stopper periphery 32 of the limiting member 30 and cannot be disassembled, that is, the blocking disc 20 and the fixed disc 10 are not disassembled after assembly to form an integral blocking structure, thereby ensuring the connection firmness of the entire left atrial appendage blocking device.

[0035] In the embodiment, the universal structure 41 is a ball head structure, and the diameter of the through hole is smaller than the diameter of the ball head structure. In this way, the ball head structure cannot pass through the through hole, preventing the limiting member 30 from being separated from the universal joint member 40 after assembly.

[0036] In the embodiment, the fixed disc 10 is provided with a barb, and the fixed disc 10 is fixed by connecting with the pectinate muscle through the barb.

[0037] In an alternative embodiment, the limiting member 30 and the fixed disc 10 are an integral structure. Through the above arrangement, the connection firmness between the fixed disc 10 and the limiting member 30 can be ensured, and the service life of the left atrial appendage blocking device is improved.

[0038] As shown in Figures 1 to 4 The second end of the universal joint member 40 has a connecting portion 43, which is a cylindrical structure, and the end of the blocking disc 20 close to the fixed disc 10 extends into the connecting portion 43 and is welded with the connecting portion 43. Specifically, the end of the connecting portion 43 away from the fixed disc 10 is an opening, and the end of the blocking disc 20 close to the fixed disc 10 has a steel sleeve 21, which extends into the connecting portion 43 and is connected and fixed with the cylindrical wall of the connecting portion 43. In the embodiment, the steel sleeve 21 can be connected and fixed with the connecting portion 43 by welding, bonding or interference fit press connection and the like.

[0039] Further, the length of the connecting portion 43 in the embodiment is adapted to the length of the steel sleeve 21, so as to cooperate with the size of the steel sleeve 21 to form an optimal welding point, avoiding that the bottom of the connecting portion 43 is out of the steel sleeve 21 to form a virtual welding, causing the sealing disc 20 to fall off.

[0040] As shown in Figure 2 and Figure 4 , the universal joint member 40 further comprises an intermediate transition portion 42 connected with the universal structure 41 in sequence, and the cross-sectional area of the intermediate transition portion 42 is smaller than that of the universal structure. That is, the universal structure 41, the intermediate transition portion 42 and the connecting portion 43 are connected in sequence. By providing the intermediate transition portion 42, universal adjustment between the limiting piece 30 and the universal structure 41, that is, between the fixing disc 10 and the sealing disc 20, can be achieved, so that the direction angle between the fixing disc 10 and the sealing disc 20 can be adaptively adjusted according to the different shapes of the left atrial appendage.

[0041] In the embodiment, as shown in Figure 4 , the intermediate transition portion 42 is a waist-shaped structure with a diameter gradually decreasing from both ends to the middle. The inner edge of the stopper periphery 32 is adapted to the shape of the intermediate transition portion 42. Specifically, both ends of the intermediate transition portion 42 are inwardly tapered in diameter by a ball head structure and the connecting portion 43, respectively. The stopper periphery 32 corresponds to the part of the intermediate transition portion 42 with the smallest middle diameter, and the peripheral side surface of this part is an arc surface connected with the ball head structure in sequence. Correspondingly, the cross section of the inner edge of the stopper periphery 32 is also a smooth arc. Since the stopper periphery 32 and the waist-shaped structure of the intermediate transition portion 42 have a corresponding motion relationship, the above arrangement is beneficial to better fit the stopper periphery 32 to the waist-shaped structure of the intermediate transition portion 42 during universal rotation, thereby maximizing the rotation adjustment angle and improving the adjustment flexibility.

[0042] Further, the part of the intermediate transition portion 42 inwardly tapered from one end of the connecting portion 43 is a trapezoidal structure, thereby increasing the overall thickness of the waist-shaped structure, enhancing the tensile strength of the universal joint member 40 and improving the service life.

[0043] In the embodiment, the minimum diameter of the cross section of the intermediate transition portion 42 is smaller than the hole diameter of the through hole. Through the above arrangement, the intermediate transition portion 42 has a certain space for movement at the through hole, so as to rotate with the universal structure 41 and realize universal adjustment.

[0044] In the embodiment, the universal joint member 40 is of an integral structure. Through the above arrangement, the connection firmness between the components of the universal joint member 40 can be ensured, and the service life is improved.

[0045] Of course, the universal joint member 40 can also not be a one-piece structure, specifically, the universal structure 41 and the intermediate transition portion 42 can be a one-piece structure, when assembled, the connecting segment 33 of the limiting piece 30 is welded first, then the universal structure 41 and the intermediate transition portion 42 are inserted into the accommodating cavity 31 of the limiting piece 30 from the end away from the blocking disc 20, wherein the intermediate transition portion 42 is inserted out of the through hole, and the universal structure 41 is accommodated in the accommodating cavity 31, then the intermediate transition portion 42 is connected and fixed with the connecting portion 43 by welding or the like, and the universal structure 41 is limited and stopped by the stopping peripheral edge 32, so that the limiting piece 30 and the universal joint member 40 cannot be disassembled after assembly.

[0046] As shown in Figure 1 The blocking disc 20 is provided with a connecting piece 50 away from the fixed disc 10, and the connecting piece 50 has a threaded segment for threaded connection with a delivery device of the left atrial appendage occlusion system.

[0047] In the embodiment, the cross section of the blocking disc 20 is a trapezoidal structure, and the diameter of the blocking disc 20 gradually decreases along the direction close to the fixed disc 10. Further, the fixed disc 10 and / or the blocking disc 20 is provided with at least one layer of flow resistance film 60. Specifically, the fixed disc 10 in the embodiment is provided with one layer of flow resistance film 60, and the blocking disc 20 is provided with two layers of flow resistance film 60, so that the blocking disc 20 can form stable fixation by its own radial support force at the left atrial appendage opening and form double-layer flow resistance protection. By arranging the flow resistance film 60, the outer disc of the blocking disc 20 and the left atrial appendage opening are flat and left heart conforming, and will not protrude at the left atrial appendage opening, reducing the risk of residual leakage, greatly improving the occlusion effect, and will not cause any impact on the left superior pulmonary vein and the mitral valve.

[0048] Specifically, in actual use, the blocking disc 20 is pulled by the fixed fixed disc 10 after being fixed, so that the blocking disc 20 conforms to the left atrial appendage, the diameter of the blocking disc 20 gradually decreases along the left atrial appendage, and the blocking disc 20 forms a bottle plug structure, the smaller diameter end of the bottle plug is close to the bottom of the left atrial appendage, and the larger diameter end is attached to the opening of the left atrial appendage.

[0049] Further, during the operation, with the development of one-stop ablation and occlusion, there will be edema at the left atrial appendage opening after ablation, and new residual leakage and residual cavity will be formed after the left atrial appendage occluder is implanted and the left atrial appendage opening is de-swollen. Since the left atrial appendage occluder with a trapezoidal angle design has a elastic mesh tube, it can conform to the left atrial appendage opening after de-swelling and will not form new residual cavity and residual leakage.

[0050] The utility model also provides a left atrial appendage occlusion system which comprises the left atrial appendage occluder and a delivery device for delivering the left atrial appendage occluder, and the left atrial appendage occluder is detachably connected with the delivery device.

[0051] In the embodiment, the delivery device comprises a delivery steel cable and a delivery sheath. The delivery steel cable is screwed with the connecting piece 50 of the left atrial appendage occluder. The left atrial appendage occluder is accommodated in the delivery sheath.

[0052] Specifically, the fixed disc 10 and the occlusion disc 20 have elasticity and can be retracted in the delivery sheath. After selecting the appropriate occlusion disc 20 and fixed disc 10 and connecting, the delivery sheath is delivered to the vicinity of the designated position. By operating the delivery steel cable, the left atrial appendage occluder is pushed out of the delivery sheath. The fixed disc 10 is first stretched out of the delivery sheath. The fixed disc 10 is made of a memory metal such as nickel-titanium alloy and restores to the original shape after being stretched out of the delivery sheath. At this time, the delivery steel cable is moved so that the fixed disc 10 is connected to the pectinate muscle of the left atrial appendage through the barb. Then the delivery steel cable is continuously moved so that the occlusion disc 20 is pushed out of the delivery sheath and restores to the original state, and the release of the left atrial appendage occluder is completed.

[0053] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: the left atrial appendage occluder comprises a fixed disc 10, an occlusion disc 20 and a universal joint assembly. The universal joint assembly is connected with the fixed disc 10 and the occlusion disc 20 respectively to enable the occlusion disc 20 to rotate in all directions relative to the fixed disc 10. The universal joint assembly comprises a limiting piece 30 and a universal joint member 40. The limiting piece 30 has a containing cavity 31. The first end of the universal joint member 40 has a universal structure 41 which is movably arranged in the containing cavity 31 and forms a limiting stop with the limiting piece 30. The limiting piece 30 comprises a plurality of connecting segments 33 which are sequentially welded to form the containing cavity 31. The connecting end faces of the adjacent two connecting segments 33 are provided with matched clamping structures. In this way, the fixed disc 10 and the occlusion disc 20 are assembled by the universal joint assembly to form an integral occlusion structure which cannot be disassembled. Before assembly, the appropriate fixed disc 10 and occlusion disc 20 can be selected according to the actual clinical needs. Further, the occlusion disc 20 rotates in all directions relative to the fixed disc 10 through the universal connection of the universal structure 41 and the limiting piece 30. Thus, the direction and angle can be adjusted according to the actual clinical needs, so that the left atrial appendage occluder can be completely adapted to the patient, greatly improving the applicability of the left atrial appendage occluder. In addition, the clamping structure is arranged at the welding position of the limiting piece 30, so that the limiting piece 30 can be combined without using tooling, reducing the production cost. When welding, the phenomenon of extrusion or displacement caused by thermal expansion and cold contraction can be avoided due to the matching relationship, improving the service life of the limiting piece 30.

[0054] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0055] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an either chronological or spatial relation. Rather, these terms can be used solely to distinguish a certain specific entity from another entity. It should be understood that the terms so used in the description are interchangeable under appropriate circumstances and embodiments of the application described herein are capable of operating in other sequences than described or illustrated herein.

[0056] The preferred embodiments of the present application have been described above with the aid of drawing figures, and are not limited to those embodiments; instead, they will include any changes that do not constitute departures from the spirit and scope of the present application.

Claims

1. A left atrial appendage occlusion device, characterized in that, include: Fixed disk (10); Sealing plate (20); Universal joint assembly, the universal joint assembly is connected to the fixed plate (10) and the sealing plate (20) respectively, so that the sealing plate (20) can rotate universally relative to the fixed plate (10); The universal joint assembly includes a limiting member (30) and a universal joint member (40). The limiting member (30) has a receiving cavity (31). The first end of the universal joint member (40) has a universal structure (41). The universal structure (41) is movably disposed in the receiving cavity (31) and forms a limiting stop with the limiting member (30). The limiting member (30) includes multiple connecting segments (33), which are welded together end to end to form the accommodating cavity (31). The connecting end faces of two adjacent connecting segments (33) are provided with a matching snap-fit ​​structure.

2. The left atrial appendage occlusion device according to claim 1, characterized in that, The snap-fit ​​structure includes a rib (34) and a groove (35). One of the ribs (34) and the groove (35) is provided at the connecting end face of one of the two adjacent connecting segments (33), and the other of the ribs (34) and the groove (35) is provided at the corresponding connecting end face of the other connecting segment (33).

3. The left atrial appendage occlusion device according to claim 1, characterized in that, The limiting member (30) is provided with a stop periphery (32) extending radially inward at the end near the universal joint member (40). The stop periphery (32) limits and stops the universal structure (41) along the axial direction of the limiting member (30). A through hole is formed in the middle of the stop periphery (32) to avoid at least a part of the universal joint member (40).

4. The left atrial appendage occlusion device according to claim 3, characterized in that, The universal structure (41) is a ball-head structure, and the diameter of the through hole is smaller than the diameter of the ball-head structure.

5. The left atrial appendage occlusion device according to claim 3, characterized in that, The universal joint component (40) also includes an intermediate transition portion (42) sequentially connected to the universal structure (41). The intermediate transition portion (42) passes through the through hole, and the cross-sectional area of ​​the intermediate transition portion (42) is smaller than the cross-sectional area of ​​the universal structure (41).

6. The left atrial appendage occlusion device according to claim 5, characterized in that, The intermediate transition section (42) is a waist-shaped structure that gradually narrows from both ends to the middle, and the inner edge of the stop perimeter (32) is adapted to the shape of the intermediate transition section (42).

7. The left atrial appendage occlusion device according to claim 1, characterized in that, The second end of the universal joint component (40) has a connecting part (43), which is a cylindrical structure. The end of the sealing disc (20) near the fixing disc (10) extends into the connecting part (43) and is connected and fixed to the connecting part (43).

8. The left atrial appendage occlusion device according to claim 1, characterized in that, The occlusion disc (20) is provided with a connector (50) at one end away from the fixed disc (10). The connector (50) has a threaded section for threaded connection with the delivery device of the left atrial appendage occlusion system.

9. The left atrial appendage occlusion device according to any one of claims 1 to 8, characterized in that, At least one layer of flow-blocking membrane (60) is provided on the fixed plate (10) and / or the sealing plate (20).

10. A left atrial appendage occlusion system, characterized in that, The invention includes a left atrial appendage occluder as described in any one of claims 1 to 9 and a delivery device for delivering the left atrial appendage occluder, wherein the left atrial appendage occluder is detachably connected to the delivery device.

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