Non-invasive left atrial appendage occluder

Abstract

The application relates to the technical field of medical devices, in particular to a non-invasive left auricle occluder, which comprises an occlusion component, a waist connecting assembly and a fixing component, the occlusion component is connected with the fixing component through the waist connecting assembly; the occlusion component is a mesh cage structure woven by elastic braided wires; the fixing component is a hat-shaped structure with an internal cavity woven by elastic braided wires, the brim of the hat-shaped structure extends towards the outside and extends towards the inside after being bent. In the use process, under the backward pulling of the steel cable connecting assembly, the brim changes into a smooth hook-shaped structure without an obtuse angle, the hook is arranged on the auricle wall, the contact area with the auricle wall is increased, the resistance is increased, the non-invasive left auricle occluder is more stable and firm in fixation with the auricle wall, a non-injury instrument fixation mode is formed, and the elastic braided wires have excellent flexibility and shape adaptability and can be self-adapted to left auricles with different structures.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a non-invasive left atrial appendage occluder. Background Technology

[0002] Atrial fibrillation is a common arrhythmia, and its prevalence is increasing with the global aging population. Treatment options for stroke caused by atrial fibrillation include anticoagulation therapy, surgical closure or resection of the left atrial appendage, and interventional occlusion of the left atrial appendage. Currently, all left atrial appendage occluders on the market, regardless of whether they are plug-type, double-disc-type, or cap-type, are fixed primarily by anchor pins. However, they have the following drawbacks: (1) excessively deep anchor pins can easily lead to perforation of the left atrial appendage wall and cardiac tamponade; (2) poor compatibility with cauliflower-shaped and irregular shapes; (3) gaps due to shape mismatch, resulting in residual shunts after surgery; (4) anchor pins can irritate the left atrial appendage tissue, leading to abnormal endothelialization; (5) the rigidity of the nickel-titanium tube and the anchor pins are prone to fatigue fracture. Utility Model Content

[0003] The purpose of this application is to provide a non-invasive left atrial appendage occlusion device, which to some extent solves the technical problem of the urgent need to develop a new type of occlusion device using a non-point anchoring fixation method in the existing technology.

[0004] This application provides a non-invasive left atrial appendage occlusion device, comprising: a fixation component, a waist connection component, and an occlusion component; wherein, the occlusion component is connected to the fixation component through the waist connection component; the occlusion component is a hollow mesh structure woven from elastic braided yarns, and the fixation component is a hollow cap-shaped structure woven from elastic braided yarns with a brim, wherein the opening of the cap-shaped structure is disposed away from the occlusion component, and the brim of the cap-shaped structure extends outward and inward after bending.

[0005] In the above technical solution, the waist connection assembly further includes a first support member, a first clamping member, and a first fastening nut; wherein, the first support member includes a first limiting part and a first screw part connected to each other, the first clamping member and the first fastening nut are both sleeved on the first screw part, and the first clamping member is disposed against the first limiting part, and a plurality of first slots are provided on the side of the first clamping member away from the first limiting part; One end of the sealing member near the waist connecting assembly is disposed between the first clamping member and the first fastening nut; the first fastening nut is threadedly connected to the first screw portion, and the first fastening nut presses against the end of the waist connecting assembly near the fixing member.

[0006] In any of the above technical solutions, further, each of the first card slots is through-type along both sides perpendicular to its depth direction.

[0007] In any of the above technical solutions, the waist connection assembly further includes a second clamping member and a second fastening nut; wherein the second clamping member and the second fastening nut are both sleeved on the first screw portion, and the second clamping member abuts against the side of the first fastening nut away from the first clamping member, and the side of the second clamping member away from the first fastening nut is provided with a plurality of second slots; One end of the fixing member near the waist connecting assembly is disposed between the second clamping member and the second fastening nut; the second fastening nut is threadedly connected to the first screw portion, and the second fastening nut presses against the end of the fixing member near the waist connecting assembly.

[0008] In any of the above technical solutions, further, each of the second card slots is through-type on both sides along its depth direction.

[0009] In any of the above technical solutions, the non-invasive left atrial appendage occluder further includes a tail connection assembly, and the tail connection assembly is connected to the end of the occlusion member away from the waist connection assembly; the tail connection assembly has a connecting thread portion and is used for threaded connection with the steel cable connection assembly.

[0010] In any of the above technical solutions, the tail connection assembly further includes a second support member, a third clamping member, and a third fastening nut; wherein the second support member includes a second limiting part and a second screw part connected together; wherein the third clamping member and the third fastening nut are both sleeved on the second screw part, and the third clamping member is disposed close to the second limiting part, and a plurality of third slots are provided on the side of the third clamping member away from the second limiting part; The end of the sealing member away from the waist connecting assembly is disposed between the third clamping member and the third fastening nut; the third fastening nut is threadedly connected to the second screw portion, and the third fastening nut is used to clamp the end of the sealing member away from the waist connecting assembly.

[0011] In any of the above technical solutions, further, the third slot is through-type on both sides along its depth direction.

[0012] In any of the above technical solutions, the blocking member is further described as a disc-shaped mesh cage structure; the blocking member includes a first woven mesh section, a second woven mesh section, and a sidewall woven mesh section; wherein the fixing member, the waist connecting assembly, and the blocking member are arranged sequentially along a first preset direction; the first woven mesh section and the second woven mesh section are spaced apart along the first preset direction, and the first woven mesh section is located close to the waist connecting assembly; The sidewall woven mesh portion is connected between the first woven mesh portion and the second woven mesh portion; along the first preset direction, the projection of the first woven mesh portion falls into the projection of the second woven mesh portion, and a gap is formed between the outer contours of the two projections, so that the sidewall woven mesh portion is set in an inclined shape.

[0013] In any of the above technical solutions, both the first woven mesh portion and the second woven mesh portion are disc-shaped.

[0014] In any of the above technical solutions, the sealing component is further covered with a double-layer flow-blocking membrane.

[0015] In any of the above technical solutions, the fixing member is further covered with a double-layer flow-blocking membrane.

[0016] In any of the above technical solutions, the sealing component is further made of shape memory metal.

[0017] In any of the above technical solutions, the fixing component is further made of shape memory metal.

[0018] In any of the above technical solutions, the sealing member is further woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament.

[0019] In any of the above technical solutions, the fixing member is further woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament.

[0020] In any of the above technical solutions, the centerlines of the fixing member, the waist connecting assembly, and the sealing member coincide.

[0021] Compared with the prior art, the beneficial effects of this application are as follows: In the non-invasive left atrial appendage occluder provided in this application, the fixing component that cooperates with the atrial appendage wall is provided with a cap-shaped structure with a brim. As the entire non-invasive left atrial appendage occluder is pulled backward by the steel cable connecting assembly, the brim of the fixing component changes into a smooth hook-shaped structure without obtuse angles, hooking onto the atrial appendage wall, increasing the contact surface with the atrial appendage wall, and playing a role in increasing resistance. This makes the non-invasive left atrial appendage occluder more stable and firm in its fixation to the atrial appendage wall. It can be seen that the non-invasive left atrial appendage occluder forms a non-damaging device fixation method between itself and the atrial appendage wall. Moreover, the elastic braided wire has excellent flexibility and shape conformity, which can adapt to different shapes, sizes and uneven surfaces of the left atrial appendage, achieving a tighter and more seamless fit.

[0022] This non-invasive left atrial appendage occluder relies on the radial support force of the entire disc surface and the axial positioning capability of the flanged structure. This "surface contact" fixation method may have a greater advantage in long-term stability compared to "point contact" anchors. It can adapt to the periodic beating of the heart and the dynamic contraction and relaxation of the left atrial appendage itself, providing a dynamic and flexible fixation that is less prone to stability loss due to tissue remodeling or device displacement. Therefore, the non-invasive left atrial appendage occluder provided in this application is a fixation device that uses a self-expanding, flanged, and surface-adhesive fixation method, which can better adapt to the "irregular and multi-shaped" atrial appendage types (such as weather vane-shaped and cauliflower-shaped left atrial appendages). Moreover, the woven structure has stronger fatigue resistance and can withstand the mechanical impact of periodic cardiac contractions for a long time, reducing the risk of device deformation or breakage.

[0023] In addition, this non-invasive left atrial appendage occluder can adapt to the periodic pulsation of the heart and the dynamic contraction and relaxation of the left atrial appendage itself, providing a dynamic and flexible fixation that is not prone to decreased stability due to tissue remodeling or device displacement.

[0024] Furthermore, this non-invasive left atrial appendage occluder provides endothelial cells with a continuous, stable, unobstructed, and non-irritating "growth scaffold," allowing cells to quickly and evenly crawl from the periphery to the center to cover the endothelial cells. Moreover, due to the better conditions (non-invasive, low inflammation), the crawling and proliferation of endothelial cells are not hindered, which can significantly shorten the time required for the device to be completely covered. The uniformly woven mesh surface avoids "dead zones" and "obstacles," making the formed endothelial layer more reliable in terms of structural and functional occlusion, and with higher long-term safety.

[0025] In addition, the woven mesh has excellent flexibility, supporting safe multiple retrievals and repositioning. Doctors can more easily choose the optimal occlusion location to achieve perfect occlusion without worrying too much about damage caused by retrieval. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 Exploded view of the non-invasive left atrial appendage occluder provided in the embodiments of this application; Figure 2 An assembly diagram of the non-invasive left atrial appendage occluder provided in the embodiments of this application; Figure 3 Another assembly diagram of the non-invasive left atrial appendage occluder provided in the embodiments of this application; Figure 4 This is a structural schematic diagram of the fixing member provided in the embodiments of this application; Figure 5 An exploded view of the waist connection assembly provided in the embodiments of this application; Figure 6 An assembly diagram of the waist connection assembly provided in an embodiment of this application; Figure 7 Another assembly diagram of the non-invasive left atrial appendage occluder provided in the embodiments of this application; Figure 8 A schematic diagram of the initial assembly of the non-invasive left atrial appendage occluder with the atrial appendage provided in the embodiments of this application; Figure 9 A schematic diagram of the final assembly of the noninvasive left atrial appendage occluder with the atrial appendage provided in the embodiments of this application; Figure 10 for Figure 9 A magnified structural diagram at point A.

[0028] Figure label: 1-Fixing component, 11-Body, 12-Brim, 121-First brim, 122-Second brim, 123-Third brim, 13-Hook structure, 2-Waist connecting component, 21-First support component, 211-First limiting part, 212-First screw part, 22-First clamping component, 221-First slot, 23-First fastening nut, 24-Second clamping component, 241-Second slot, 25-Second fastening nut, 3-Sealing component, 31-First woven mesh part, 32-Second woven mesh part, 33-Side wall woven mesh part, 4-Tail connecting component, 5-Sewing thread, 6-Heart loop, a-First preset direction. Detailed Implementation

[0029] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0030] The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0031] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The following reference Figures 1 to 10 This application describes a non-invasive left atrial appendage occluder according to some embodiments.

[0035] See Figures 1 to 10As shown, an embodiment of this application provides a non-invasive left atrial appendage occlusion device, including: a fixation component 1, a waist connection component 2, and an occlusion component 3; wherein, the occlusion component 3 is connected to the fixation component 1 through the waist connection component 2; the occlusion component 3 is a hollow mesh structure woven from elastic braided yarns, and the fixation component 1 is a hollow cap-shaped structure woven from elastic braided yarns with a brim, wherein the opening of the cap-shaped structure is disposed away from the occlusion component 3, and the brim of the cap-shaped structure extends outward and inward after bending, that is, the cap-shaped structure includes a connected body 11. The hat brim 12 includes a first brim 121, a second brim 122, and a third brim 123 connected in sequence. The first brim 121 is connected to the body 11. The first brim 121 extends outward, the third brim 123 extends inward, and the second brim 122 is connected between the first brim 121 and the third brim 123. It should be noted that the brim is not limited to bending towards the waist connecting component 2 as described above, but can also bend in the opposite direction, that is, the brim can also bend away from the waist connecting component 2, depending on the actual needs.

[0036] Based on the structure described above, the usage process of the non-invasive left atrial appendage occluder provided in this application is roughly as follows: First, the connecting threaded part of the adapter component described below, such as the threaded hole, is tightly screwed together with the existing steel cable connecting component. Then, the delivery steel cable is pulled backward. During this process, the traction force will play a role, allowing the non-invasive left atrial appendage occluder to be smoothly placed inside the sheath. Then, the non-invasive left atrial appendage occluder is moved to the predetermined target position and a release operation is performed. During the release process, the cap of the fixing component 1 cooperates with the inner wall of the atrial appendage 6. As the entire non-invasive left atrial appendage occluder is pulled backward, the cap of the fixing component 1 forms a smooth hook-shaped structure 13 without obtuse angles, which hooks onto the inner wall of the atrial appendage 6, thereby forming a non-damaging device fixation method. The occlusion component 3 can fit tightly against the opening of the atrial appendage 6, thereby achieving the effect of secondary occlusion. After the release is completed, the steel cable is unscrewed counterclockwise, and then the delivery component is withdrawn from the human body to complete the entire release process. Of course, it is not limited to this, and the steps can be adjusted according to actual needs.

[0037] As can be seen, in the non-invasive left atrial appendage occluder provided in this application, the fixing component 1 that cooperates with the wall of the atrial appendage 6 is provided with a cap-shaped structure with a brim. As a result, when the steel cable connecting assembly pulls the entire non-invasive left atrial appendage occluder backward, the brim of the fixing component 1 changes into a smooth hook-shaped structure 13 without obtuse angles, which hooks onto the wall of the atrial appendage 6, increasing the contact surface with the inner wall of the atrial appendage 6 and increasing resistance. This makes the non-invasive left atrial appendage occluder more stable and firm in its fixation to the inner wall of the atrial appendage 6. It can be seen that the non-invasive left atrial appendage occluder forms a non-damaging device fixation method between itself and the inner wall of the atrial appendage 6. Moreover, the elastic braided yarn has excellent flexibility and shape conformity, which can adapt to different shapes, sizes and uneven surfaces of the left atrial appendage 6, achieving a tighter and more seamless fit.

[0038] This non-invasive left atrial appendage occluder relies on the radial support force of the entire disc surface and the axial positioning capability of the flanged structure. This "surface contact" fixation method may have a greater advantage in long-term stability compared to "point contact" anchors. It can adapt to the periodic beating of the heart and the dynamic contraction and relaxation of the left atrial appendage itself, providing a dynamic and flexible fixation that is less prone to stability loss due to tissue remodeling or device displacement. Therefore, the non-invasive left atrial appendage occluder provided in this application is a fixation device that uses a self-expanding, flanged, and surface-adhesive fixation method, which can better adapt to the "irregular and multi-shaped" atrial appendage types (such as weather vane-shaped and cauliflower-shaped left atrial appendages). Moreover, the woven structure has stronger fatigue resistance and can withstand the mechanical impact of periodic cardiac contractions for a long time, reducing the risk of device deformation or breakage.

[0039] In addition, this non-invasive left atrial appendage occluder can adapt to the periodic pulsation of the heart and the dynamic contraction and relaxation of the left atrial appendage itself, providing a dynamic and flexible fixation that is less prone to stability loss due to tissue remodeling or device displacement.

[0040] Furthermore, this non-invasive left atrial appendage occluder provides endothelial cells with a continuous, stable, unobstructed, and non-irritating "growth scaffold," allowing cells to quickly and evenly crawl from the periphery to the center to cover the endothelial cells. Moreover, due to the better conditions (non-invasive, low inflammation), the crawling and proliferation of endothelial cells are not hindered, which can significantly shorten the time required for the device to be completely covered. The uniformly woven mesh surface avoids "dead zones" and "obstacles," making the formed endothelial layer more reliable in terms of structural and functional occlusion, and with higher long-term safety.

[0041] In addition, the woven mesh has excellent flexibility, supporting safe multiple retrievals and repositioning. Doctors can more easily choose the optimal occlusion location to achieve perfect occlusion without worrying too much about damage caused by retrieval.

[0042] Furthermore, by setting three parameters—filament diameter, weaving density, and edging structure—the magnitude of self-expansion force and radial support force can be controlled. This ensures both the fixation strength during fitting and prevents excessive pressure on the left atrial appendage wall, providing a safer option, especially for patients with large, shallow openings or fragile tissues. It should be noted that the above-mentioned auricle 6 generally refers to the left auricle, but of course, it is not limited to this.

[0043] In this embodiment, preferably, as follows: Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the waist connection assembly 2 includes a first support member 21, a first clamping member 22, and a first fastening nut 23; wherein, the first support member 21 includes a first limiting part 211 and a first screw part 212 connected to each other, the first clamping member 22 and the first fastening nut 23 are both sleeved on the first screw part 212, and the first clamping member 22 is disposed against the first limiting part 211, and a plurality of first slots 221 are provided on the side of the first clamping member 22 away from the first limiting part 211; One end of the sealing member 3 near the waist connecting component 2 is disposed between the first pressing member 22 and the first fastening nut 23; the first fastening nut 23 is threadedly connected to the first screw part 212, and the first fastening nut 23 presses the end of the sealing member 3 near the fixing member 1. As can be seen from the structure described above, the elastic braided wire at the end of the sealing member 3 near the waist connecting component 2 can be installed between the first pressing member 22 and the first fastening nut 23. Then, by tightening the first fastening nut 23, the elastic braided wire at the end of the sealing member 3 away from the waist connecting component 2 is firmly pressed into the first slot 221 of the first pressing member 22, thereby tightening and fixing the elastic braided wire at the end of the sealing member 3 near the waist connecting component 2.

[0044] In this embodiment, preferably, as follows: Figure 5 As shown, both sides of any first slot 221 are through-type along the direction perpendicular to its depth, which makes it easier to snap the elastic braided wire of the end of the sealing member 3 near the waist connecting component 2 into the first slot 221. Of course, the first slot 221 is not limited to the structure with openings on both sides along the direction perpendicular to its depth, but can also be open on one side, or not open on the side, depending on the actual needs. In this embodiment, preferably, as follows: Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the waist connecting assembly 2 also includes a second clamping member 24 and a second fastening nut 25; wherein, the second clamping member 24 and the second fastening nut 25 are both sleeved on the first screw portion 212, and the second clamping member 24 abuts against the side of the first fastening nut 23 away from the first clamping member 22, and a plurality of second slots 241 are provided on the side of the second clamping member 24 away from the first fastening nut 23; One end of the fixing member 1 near the waist connecting component 2 is disposed between the second clamping member 24 and the second fastening nut 25; the second fastening nut 25 is threadedly connected to the first screw part 212, and the second fastening nut 25 presses the elastic braided wire of the fixing member 1 near the waist connecting component 2. As can be seen from the structure described above, the elastic braided wire at the end of the fixing member 1 near the waist connecting component 2 can be installed between the second pressing member 24 and the second fastening nut 25. Then, by tightening the second fastening nut 25, the elastic braided wire at the end of the fixing member 1 near the waist connecting component 2 can be firmly pressed into the second slot 241 of the second pressing member 24, thereby tightening and fixing the elastic braided wire at the end of the fixing member 1 near the waist connecting component 2.

[0045] In this embodiment, preferably, as follows: Figure 5 As shown, both sides of any second slot 241 are through-type along the direction perpendicular to its depth, which makes it easier to snap the elastic braided wire of the end of the sealing member 3 near the waist connecting component 2 into the second slot 241. Of course, the second slot 241 is not limited to the structure with openings on both sides along the direction perpendicular to its depth, but can also be open on one side, or not open on the side, depending on the actual needs. In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the non-invasive left atrial appendage occluder also includes a tail connection component 4, which is connected to the end of the occlusion member 3 away from the waist connection component 2; the tail connection component 4 has a connecting thread and is used to connect to the steel cable connection component threadedly. As can be seen from the structure described above, the tail connecting component 4 is used to achieve a threaded connection with the steel cable connecting component, which facilitates installation and disassembly. In particular, after the non-invasive left atrial appendage occluder is installed in place with the atrial appendage 6, the steel cable of the steel cable connecting component can be unscrewed counterclockwise to release the threaded connection with the tail connecting component 4. Then, the delivery component is withdrawn from the human body to complete the entire release process.

[0046] In this embodiment, preferably, the tail connection assembly 4 further includes a second support member, a third clamping member, and a third fastening nut (not shown in the figure); wherein, the second support member includes a second limiting part and a second screw part connected to each other; wherein, the third clamping member and the third fastening nut are both sleeved on the second screw part, and the third clamping member is disposed close to the second limiting part, and a plurality of third slots are provided on the side of the third clamping member away from the second limiting part; One end of the sealing member 3 away from the waist connecting component 2 is disposed between the third clamping member and the third fastening nut; the third fastening nut is threadedly connected to the second screw part, and the third fastening nut is used to clamp the end of the sealing member 3 away from the waist connecting component 2. As can be seen from the structure described above, when the tail connection assembly 4 provided in this application is used, the elastic braided wire at the end of the sealing member 3 away from the waist connection assembly 2 is first installed between the third pressing member and the third fastening nut. Then, by tightening the third fastening nut, the elastic braided wire at the end of the sealing member 3 away from the waist connection assembly 2 is pressed, thereby tightening and fixing the elastic braided wire at the end of the sealing member 3 away from the waist connection assembly 2.

[0047] Furthermore, preferably, the threaded connection part is a threaded hole, which facilitates the threaded connection with the steel cable connection assembly. Of course, it is not limited to this. The threaded connection part can also be a stud, and a corresponding connecting stud can be provided on the steel cable connection assembly. The specific choice depends on the actual needs. It should be noted that when the threaded connection part is a threaded hole, this threaded hole is provided on the limiting part and the screw part, or only on the limiting part. When the threaded connection part is a screw, it is provided on the side of the limiting part away from the screw part.

[0048] In this embodiment, preferably, both sides of any third slot are through-type (not shown in the figure) along the direction perpendicular to its depth. This makes it easier to snap the elastic braided wire of the end of the sealing member 3 away from the waist connecting component 2 into the third slot. Of course, the third slot is not limited to the structure with openings on both sides along the direction perpendicular to its depth. It can also be open on one side or not open on the side. The specific choice depends on the actual needs. In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the sealing component 3 is a disc-shaped mesh cage structure, which meets the sealing requirements and has a simple shape, making it easy to wind and form.

[0049] Further, preferably, the sealing member 3 includes a first woven mesh portion 31, a second woven mesh portion 32, and a sidewall woven mesh portion 33; wherein, the fixing member 1, the waist connecting component 2, and the sealing member 3 are arranged sequentially along a first preset direction a; the first woven mesh portion 31 and the second woven mesh portion 32 are arranged at intervals along the first preset direction a, and the first woven mesh portion 31 is arranged close to the waist connecting component 2; the sidewall woven mesh portion 33 is connected between the first woven mesh portion 31 and the second woven mesh portion 32; along the first preset direction a, the projection of the first woven mesh portion 31 falls into the projection of the second woven mesh portion 32, and a gap is formed between the outer contours of the two projections, so that the sidewall woven mesh portion 33 is arranged in an inclined shape. As can be seen from the structure described above, the part of the sealing component 3 near the waist connecting component 2 is designed as a small mesh, and the part of the sealing component 3 away from the waist connecting component 2 is designed as a large mesh, thereby achieving the inclined setting of the connection side between the two. In this way, the inclined structure can abut against the side wall of the mouth of the auricle 6, thereby achieving the effect of secondary sealing. Furthermore, preferably, both the first woven mesh portion 31 and the second woven mesh portion 32 are disc-shaped, with more regular shapes, making it easier to weave and form.

[0050] Furthermore, preferably, the first preset direction a is the height direction of the fixing member 1, i.e., the hat-shaped structure. In addition, it should be noted that preferably, the height direction of the fixing member 1, i.e., the hat-shaped structure, the height direction of the sealing member 3, the height direction of the waist connecting component 2, and the height direction of the tail connecting component 4 are all the same.

[0051] In this embodiment, preferably, the outer surface of the sealing member 3 is covered with a double-layer flow-blocking membrane (not shown in the figure), which serves to block the flow and prevent blood and other liquids from entering the interior of the auricle 6. Preferably, the double-layer flow-blocking membrane is sutured and fixed to the sealing member 3 by sutures 5.

[0052] In this embodiment, preferably, the outside of the fixing member 1 is covered with a double-layer flow-blocking membrane (not shown in the figure), which serves to block the flow and prevent blood and other liquids from entering the interior of the auricle 6. Preferably, the double-layer flow-blocking membrane is sutured and fixed to the fixing member 1 by suture 5. In this embodiment, preferably, the sealing component 3 is made of shape memory metal, which has shape memory and super elasticity. When external force is applied to the material, the shape memory metal can bend and retract quickly, and then quickly return to its original shape. These materials also have good corrosion resistance and high temperature resistance.

[0053] Furthermore, preferably, the material of the sealing component 3 can be a nickel-titanium alloy. Of course, it is not limited to this. The sealing component 3 can also be other types of shape memory metal materials, depending on the actual needs. In this embodiment, preferably, the fixing member 1 is made of shape memory metal, which has shape memory and super elasticity. When an external force is applied to the material, the shape memory metal can bend and retract quickly, and then quickly return to its original shape. These materials also have good corrosion resistance and high temperature resistance.

[0054] Furthermore, preferably, the material of the fixing component 1 can be nickel-titanium alloy. Of course, it is not limited to this. The sealing component 3 can also be other types of shape memory metal materials, depending on the actual needs. In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the sealing component 3 is woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament. In other words, the sealing component 3 is woven from a single elastic braided filament, resulting in a continuous, high-strength, and durable structure. However, it is not limited to this; multiple elastic braided filaments can also be woven together into a single elastic braided filament. Furthermore, it should be noted that the sealing component 3 can also be composed of several parts, each woven from different elastic braided filaments, and then these parts can be welded, heat-fused, or connected together using other methods.

[0055] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the fixing component 1 is woven from a single elastic braided thread, and each elastic braided thread includes at least one elastic braided thread. That is, the fixing component 1 is woven from a single elastic braided thread, resulting in a continuous, high-strength, and durable structure. However, it is not limited to this; multiple elastic braided threads can also be woven together into a single elastic braided thread. Furthermore, it should be noted that the fixing component 1 can also be composed of several parts, each woven from different elastic braided threads, and then these parts can be welded, heat-fused, or connected together using other methods. In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the centerlines of the fixing component 1, waist connecting component 2, sealing component 3 and tail connecting component 4 coincide, making the overall structure more coordinated and more firmly and stably matched with the auricle 6, avoiding problems such as tilting and loose fit.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A non-invasive left atrial appendage occlusion device, characterized in that, include: The device comprises a fixing member, a waist connecting assembly, and a sealing member; wherein the sealing member is connected to the fixing member via the waist connecting assembly; the sealing member is a hollow mesh structure woven from elastic braided yarns, and the fixing member is a hollow cap-shaped structure woven from elastic braided yarns with a brim, wherein the opening of the cap-shaped structure is disposed away from the sealing member, and the brim of the cap-shaped structure extends outward and then extends inward after bending.

2. The non-invasive left atrial appendage occlusion device according to claim 1, characterized in that, The waist connection assembly includes a first support member, a first clamping member, and a first fastening nut; wherein, the first support member includes a first limiting part and a first screw part connected to each other, the first clamping member and the first fastening nut are both sleeved on the first screw part, and the first clamping member is disposed against the first limiting part, and a plurality of first slots are provided on the side of the first clamping member away from the first limiting part. One end of the sealing member near the waist connecting assembly is disposed between the first clamping member and the first fastening nut; the first fastening nut is threadedly connected to the first screw portion, and the first fastening nut presses against the end of the waist connecting assembly near the fixing member.

3. The non-invasive left atrial appendage occlusion device according to claim 2, characterized in that, Both sides of any of the first card slots are through-type along a direction perpendicular to its depth direction.

4. The non-invasive left atrial appendage occlusion device according to claim 2, characterized in that, The waist connection assembly further includes a second clamping member and a second fastening nut; wherein the second clamping member and the second fastening nut are both sleeved on the first screw portion, and the second clamping member abuts against the side of the first fastening nut away from the first clamping member, and the side of the second clamping member away from the first fastening nut is provided with a plurality of second slots; One end of the fixing member near the waist connecting assembly is disposed between the second clamping member and the second fastening nut; the second fastening nut is threadedly connected to the first screw portion, and the second fastening nut presses against the end of the fixing member near the waist connecting assembly.

5. The non-invasive left atrial appendage occlusion device according to claim 4, characterized in that, Both sides of any of the second slots are through-holes along a direction perpendicular to its depth direction.

6. The non-invasive left atrial appendage occlusion device according to claim 1, characterized in that, The non-invasive left atrial appendage occluder also includes a tail connection assembly, which is connected to the end of the occlusion member away from the waist connection assembly; the tail connection assembly has a threaded portion and is used for threaded connection with the steel cable connection assembly.

7. The non-invasive left atrial appendage occlusion device according to claim 6, characterized in that, The tail connection assembly further includes a second support member, a third clamping member, and a third fastening nut; wherein, the second support member includes a second limiting part and a second screw part connected together; wherein, the third clamping member and the third fastening nut are both sleeved on the second screw part, and the third clamping member is disposed close to the second limiting part, and a plurality of third slots are provided on the side of the third clamping member away from the second limiting part; The end of the sealing member away from the waist connecting assembly is disposed between the third clamping member and the third fastening nut; the third fastening nut is threadedly connected to the second screw portion, and the third fastening nut is used to clamp the end of the sealing member away from the waist connecting assembly.

8. The non-invasive left atrial appendage occlusion device according to claim 7, characterized in that, Both sides of any of the third slots are through-type along a direction perpendicular to its depth direction.

9. The non-invasive left atrial appendage occlusion device according to claim 1, characterized in that, The sealing component is a disc-shaped mesh cage structure; the sealing component includes a first woven mesh section, a second woven mesh section, and a side wall woven mesh section; wherein, the fixing component, the waist connecting component, and the sealing component are arranged sequentially along a first preset direction; the first woven mesh section and the second woven mesh section are spaced apart along the first preset direction, and the first woven mesh section is arranged close to the waist connecting component; The sidewall woven mesh portion is connected between the first woven mesh portion and the second woven mesh portion; along the first preset direction, the projection of the first woven mesh portion falls into the projection of the second woven mesh portion, and a gap is formed between the outer contours of the two projections, so that the sidewall woven mesh portion is set in an inclined shape.

10. The non-invasive left atrial appendage occlusion device according to claim 9, characterized in that, Both the first woven mesh section and the second woven mesh section are disc-shaped.

11. The noninvasive left atrial appendage occlusion device according to any one of claims 1 to 10, characterized in that, The sealing component is externally covered with a double-layer flow-blocking membrane; and / or The fixing component is externally covered with a double-layer flow-blocking membrane; and / or The sealing component is made of shape memory metal; and / or The fixing component is made of shape memory metal; and / or The sealing member is woven from a single elastic braided filament, and each elastic braided filament comprises at least one elastic braided filament; and / or The fixing member is woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament; and / or The centerlines of the fixing member, the waist connecting assembly, and the sealing member coincide.

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