Adaptive atrial appendage morphology spring occluder

Abstract

This application relates to the field of medical device technology, and in particular to a spring occluder with an adaptive atrial appendage shape, comprising: a spherical elastic support, a connecting assembly, and a mesh elastic occluder; wherein, the spherical elastic support is connected to the mesh elastic occluder via the connecting assembly, and the spherical elastic support is a spherical structure formed by spirally winding elastic braided wires, while the mesh elastic occluder is a hollow mesh cage structure woven from elastic braided wires. This application provides a novel spring occluder with an adaptive atrial appendage shape, which adopts an irregularly shaped variable spring structure to adapt to different atrial appendage shapes, providing good stability, rather than using the existing anchor fixation method, thereby greatly reducing the risk of cardiac injury such as pericardial effusion and cardiac tamponade. Moreover, because this device can adapt to different atrial appendage structures, it reduces the setting of device specifications, reduces the time for doctors to select devices, and reduces the risk of misdiagnosis and device replacement.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a spring occluder that adapts to the shape of the atrial appendage. Background Technology

[0002] In recent years, advancements in catheter-based minimally invasive interventional therapy have enabled the treatment of some structural heart diseases to approach the efficacy of traditional surgery, while reducing surgical trauma, accelerating patient recovery, and lowering the difficulty and time of the procedure. Therefore, left atrial appendage occlusion has emerged as a method to prevent stroke caused by atrial fibrillation. This procedure uses catheter technology to enter through the femoral artery, pass through the interatrial septum to reach the left atrium, and release an occluder to block the thrombus from entering the bloodstream, thereby achieving the therapeutic goal. Post-operatively, patients only require short-term anticoagulation therapy, which can be discontinued once the occluder integrates with the vascular endothelium; lifelong anticoagulation is not necessary. Therefore, left atrial appendage occlusion is widely accepted due to its minimal invasiveness, high safety, and good efficacy.

[0003] There are currently two main types of left atrial appendage occluders on the market: plug-type and disc-type. However, the fixation structure of the existing plug-type and disc-type left atrial appendage occluders has the risk of excessively penetrating the thin wall of the left atrial appendage, which may lead to complications such as pericardial effusion and cardiac tamponade. Moreover, there are significant differences in the shape of the left atrial appendage between individuals, and the existing occluders cannot adapt to different shapes of atrial appendage structures. Furthermore, the current occluder specifications are simplified, which makes the selection process heavily reliant on the doctor's experience, increasing the difficulty of device selection and the risk of changing device specifications. Utility Model Content

[0004] The purpose of this application is to provide a spring occluder that adapts to the shape of the left atrial appendage, which to some extent solves the problem that the fixation structure of the plug-type and disc-type left atrial appendage occluders in the prior art is prone to excessive penetration of the thin wall of the left atrial appendage, which may lead to complications such as pericardial effusion and cardiac tamponade. Moreover, the shape of the left atrial appendage varies significantly between individuals, and the existing occluders cannot adapt to different shapes of atrial appendage structures, which leads to difficulties in selection and increases the difficulty of device selection and the risk of changing device specifications.

[0005] This application provides a spring occluder with an adaptive atrial appendage morphology, comprising: a spherical elastic support, a connecting assembly, and a mesh elastic occluder; wherein, the spherical elastic support is connected to the mesh elastic occluder through the connecting assembly, and the spherical elastic support is a structure in which elastic braided filaments are spirally wound into a spherical shape, and the mesh elastic occluder is a hollow mesh cage structure woven from elastic braided filaments.

[0006] In the above technical solution, the end of the spherical elastic support that is away from the connecting component is the far end, and the far end is a smooth sphere without sharp edges.

[0007] In any of the above technical solutions, the distal end is further formed into a smooth sphere without sharp edges by welding.

[0008] In any of the above technical solutions, the connecting component further includes a first connecting member and a second connecting member; wherein the second connecting member forms an auxiliary mounting groove, the end of the spherical elastic support near the connecting component is a proximal end, and the proximal end is wrapped around the outside of the first connecting member and inserted into the auxiliary mounting groove.

[0009] In any of the above technical solutions, the proximal end of the spherical elastic support is further connected to the first connecting member and the second connecting member by welding.

[0010] In any of the above technical solutions, the mesh elastic sealing member is further described as a disc-shaped mesh cage structure; the mesh elastic sealing member includes a first woven mesh section, a second woven mesh section, and a sidewall woven mesh section; wherein, the spherical elastic support member, the connecting component, and the mesh elastic sealing member are sequentially arranged 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 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.

[0011] In any of the above technical solutions, both the first woven mesh portion and the second woven mesh portion are disc-shaped.

[0012] In any of the above technical solutions, the adaptive atrial appendage morphology spring occluder further includes an adapter component, and the adapter component is connected to the end of the mesh elastic occluder that is away from the connecting component; the adapter component has a connecting thread portion and is used for threaded connection with the steel cable connecting component.

[0013] In any of the above technical solutions, the adapter assembly further includes a support member, a locking member, and a nut; wherein the support member includes a limiting part and a screw part connected to each other; wherein the locking member and the nut are both sleeved on the screw part, and the locking member is disposed close to the limiting part; The end of the mesh elastic sealing member away from the connecting assembly is disposed between the wire clamping member and the limiting part or between the wire clamping member and the nut, and the end of the wire clamping member near the mesh elastic sealing member away from the connecting assembly is provided with multiple slots. The nut is threadedly connected to the screw portion, and the nut is pressed onto the side of the wire clamping member away from the limiting portion or onto the end of the mesh elastic sealing member away from the connecting assembly, so as to tighten the end of the mesh elastic sealing member away from the connecting assembly; the connecting thread portion is formed on the limiting portion or simultaneously on the limiting portion and the screw portion.

[0014] In any of the above technical solutions, further, each of the card slots is through-type along both sides perpendicular to its depth direction.

[0015] In any of the above technical solutions, the connecting threaded portion is further described as a threaded hole.

[0016] In any of the above technical solutions, the connecting component is further provided with a second mounting groove, one end of the mesh elastic sealing member near the connecting component is inserted into the second mounting groove, and the mesh elastic sealing member is connected to the connecting component by forging or welding.

[0017] In any of the above technical solutions, the mesh elastic sealing member is further connected to the connecting assembly by welding.

[0018] In any of the above technical solutions, the tail end of the spherical elastic support is further connected to the mesh elastic sealing member through the connecting assembly.

[0019] In any of the above technical solutions, the spherical elastic support is further made of shape memory metal.

[0020] In any of the above technical solutions, the mesh elastic sealing element is further made of shape memory metal material.

[0021] In any of the above technical solutions, the spherical elastic support is further woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament.

[0022] In any of the above technical solutions, the mesh elastic sealing member is further woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament.

[0023] In any of the above technical solutions, the spherical elastic support is further covered with a flow-blocking membrane.

[0024] In any of the above technical solutions, the mesh elastic sealing member is further covered with a flow-blocking membrane.

[0025] In any of the above technical solutions, the centerlines of the spherical elastic support, the connecting assembly, and the mesh elastic sealing member coincide.

[0026] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a novel adaptive atrial appendage morphology spring occluder, which adopts an irregular variable spring structure to adapt to different atrial appendage shapes and has good stability, instead of using the existing anchor fixation method. This greatly reduces the risk of cardiac injury such as pericardial effusion and cardiac tamponade. Moreover, because this device can adapt to different atrial appendage structures, it reduces the setting of device specifications, reduces the time for doctors to select the device, and reduces the risk of misdiagnosis and device replacement. Attached Figure Description 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 A schematic diagram of the adaptive atrial appendage morphology spring occluder provided in an embodiment of this application; Figure 2 Another structural schematic diagram of the adaptive atrial appendage morphology spring occluder provided in an embodiment of this application; Figure 3 A schematic diagram of the assembly of the proximal end of the spherical elastic support member and the connecting assembly provided in the embodiments of this application; Figure 4 An exploded view of the adapter component provided in the embodiments of this application; Figure 5 An assembly diagram of the adaptive atrial appendage morphology spring occluder and sheath provided in an embodiment of this application; Figure 6 An assembly diagram of the adaptive atrial appendage morphology spring occluder and the atrial appendage provided in the embodiments of this application; Figure 7 Another assembly diagram of the adaptive atrial appendage morphology spring occluder and atrial appendage provided in the embodiments of this application.

[0028] Figure label: 1-Spherical elastic support, 11-Distal end, 12-Proximal end, 2-Connecting assembly, 3-Mesh elastic sealing component, 31-First braided mesh section, 32-Second braided mesh section, 33-Side wall braided mesh section, 4-Transfer assembly, 41-Supporting component, 411-Limiting part, 412-Screw part, 42-Wire clamping component, 421-Slot, 43-Nut, 5-Steel cable connecting assembly, 6-Sheath tube, 7-Heart ear, 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 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 7 This application describes a spring occluder with an adaptive atrial appendage morphology according to some embodiments.

[0035] See Figures 1 to 7As shown, an embodiment of this application provides a spring occluder with an adaptive atrial appendage morphology, comprising: a spherical elastic support 1, a connecting assembly 2, and a mesh elastic occluder 3; wherein, the spherical elastic support 1 is connected to the mesh elastic occluder 3 through the connecting assembly 2, and the spherical elastic support 1 is a structure in which elastic braided wire is spirally wound into a spherical shape, and the mesh elastic occluder 3 is a hollow mesh cage structure woven from elastic braided wire.

[0036] Based on the structure described above, the usage process of the adaptive atrial appendage morphology spring occluder provided in this application is roughly as follows: First, the threaded portion of the adapter assembly 4 (described below), such as the threaded hole, needs to be tightly screwed together with the existing steel cable connection assembly 5. After completing this assembly step, the next operation is to pull the delivery steel cable backward. During this process, the traction force will be applied, allowing the spring occluder, which adapts to the shape of the auricle 7, to be smoothly placed inside the sheath tube 6, just as... Figure 5 As shown; At this position, we can observe that the structure of the mesh elastic occluder 3 near the connecting component 2 is elliptical, while the spherical elastic support 1 is monofilamentous. This spring occluder, which adapts to the shape of the atrial appendage, is then moved to the predetermined target position and released. The distal end 11 of the spherical elastic support 1 is released first; its smooth surface design ensures that no damage is caused to the interior of the atrial appendage 7 during release. Subsequently, the spherical elastic support 1 is released gradually. Due to its unique shape, resembling rings of varying sizes, it can naturally expand during release, thus adjusting its size according to the specific shape of the atrial appendage 7, such as the left atrial appendage, to achieve a closer fit to the inner wall of the pectinate muscle. This makes it suitable for various atrial appendage 7 structures, including single-lobed and multi-lobed left atrial appendages, reducing the need for specialized equipment and enhancing its adaptability. Figure 6 and Figure 7 This was shown in more detail in the middle; We then gradually released the mesh elastic occluder 3 near the proximal end 12. After release, we ensured that it could fit tightly against the mouth of the auricle 7, thereby achieving a secondary occlusion effect. Figure 6 and Figure 7 The process was demonstrated in more detail. After release, the steel cable was unspinned counterclockwise, and then the delivery component was removed from the body to complete the 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, this application provides a novel adaptive atrial appendage morphology spring occluder, which adopts an irregular variable spring structure to adapt to different atrial appendage shapes and has good stability, rather than using the existing anchor fixation method. This greatly reduces the risk of cardiac injury such as pericardial effusion and cardiac tamponade. Moreover, since this device can adapt to different atrial appendage structures, it reduces the setting of device specifications, reduces the time for doctors to select the device, and reduces the risk of misdiagnosis and device replacement.

[0038] In this embodiment, preferably, as follows: Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the end of the spherical elastic support 1 that is away from the connecting component 2 is the distal end 11, and the distal end 11 is a smooth sphere without sharp edges. As can be seen from the structure described above, the distal end 11 of the spherical elastic support 1 is made of a smooth sphere without sharp edges, ensuring that it will not cause stimulation or damage to the auricle 7 during delivery and release.

[0039] In this embodiment, preferably, the distal end 11 is formed into a smooth, edgeless sphere by welding methods such as laser welding, argon arc welding, or plasma welding. This method is simple, convenient, and has high production efficiency. It should be noted that the method is not limited to welding; other methods can be selected according to actual needs. In this embodiment, preferably, as follows: Figure 3 As shown, the connecting component 2 includes a first connecting member and a second connecting member; wherein, the second connecting member forms an auxiliary mounting groove, and the end of the spherical elastic support 1 near the connecting component 2 is a proximal end 12, and the proximal end 12 is wrapped around the outside of the first connecting member and inserted into the auxiliary mounting groove. As can be seen from the structure described above, the proximal end 12 of the spherical elastic support 1 is first wrapped around the outside of the first connecting member, and the wrapped overall structure is inserted into the auxiliary mounting groove, thereby realizing the connection between the connecting component 2 and the spherical elastic support 1.

[0040] In this embodiment, preferably, the proximal end 12 of the spherical elastic support 1 is connected to the first connecting member and the second connecting member by welding, such as laser welding, argon arc welding, or plasma welding, to ensure a tight connection between the proximal end 12 of the spherical elastic support 1 and the connecting assembly 2, thereby preventing the risk of detachment. This method is simple and convenient to operate, and helps improve production efficiency. Of course, this is not the only option; other connection methods can also be used, depending on actual needs. In this embodiment, preferably, as follows: Figure 2 As shown, the mesh elastic sealing component 3 has a disc-shaped mesh cage structure, which meets the sealing requirements and has a simple shape, making it easy to wind and form.

[0041] Furthermore, preferably, the mesh elastic 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 spherical elastic support member 1, the connecting component 2, and the mesh elastic 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 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 set in an inclined shape. As can be seen from the structure described above, the part of the mesh elastic sealing member 3 near the spherical elastic support member 1 is designed as a small mesh, and the part of the mesh elastic sealing member 3 away from the spherical elastic support member 1 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 7, thereby achieving the effect of secondary sealing.

[0042] Furthermore, preferably, both the first woven mesh portion 31 and the second woven mesh portion 32 are disc-shaped to meet the usage requirements, and the shape of the mesh elastic sealing member 3 is regular, which facilitates weaving and forming and helps to improve production efficiency. Furthermore, preferably, the first preset direction a is the height direction of the spherical elastic support 1. In addition, it should be noted that preferably, the height directions of the spherical elastic support 1, the mesh elastic sealing member 3, the connecting component 2, and the adapter component 4 are all the same.

[0043] In this embodiment, preferably, the spherical elastic support 1 and the mesh elastic sealing member 3 are made of shape memory metal. As can be seen from the structure described above, the spherical elastic support 1 and the mesh elastic sealing component 3 are made of shape memory metal material, 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.

[0044] Furthermore, preferably, the spherical elastic support 1 and the mesh elastic sealing component 3 can be made of nickel-titanium alloy. Of course, it is not limited to this. The spherical elastic support 1 and the mesh elastic sealing component 3 can also be made of other types of shape memory metal materials, depending on the actual needs. In this embodiment, preferably, as follows: Figure 2 and Figure 4As shown, the adaptive auricle-shaped spring occluder also includes an adapter 4, which is connected to the end of the mesh elastic occluder 3 away from the connecting component 2; the adapter 4 has a connecting thread and is used to connect to the cable connecting component 5 by thread. As can be seen from the structure described above, the adapter component 4 is used to achieve a threaded connection with the steel cable connection component 5, which facilitates installation and disassembly. In particular, after the spring occluder of this adaptive aorta shape is installed in place with the aorta 7, the steel cable of the steel cable connection component 5 is unscrewed counterclockwise to release the threaded connection with the adapter component 4. Then the delivery component is withdrawn from the human body to complete the entire release process.

[0045] In this embodiment, preferably, as follows: Figure 4 As shown, the adapter assembly 4 includes a support member 41, a locking member 42, and a nut 43; wherein, the support member 41 includes a limiting part 411 and a screw part 412 connected to each other; wherein, the locking member 42 and the nut 43 are both sleeved on the screw part 412, and the locking member 42 is disposed close to the limiting part 411. The end of the mesh elastic sealing member 3 away from the connecting component 2 is disposed between the wire clamping member 42 and the limiting part 411 or between the wire clamping member 42 and the nut 43, and the end of the wire clamping member 42 near the mesh elastic sealing member 3 away from the connecting component 2 is provided with multiple slots 421. Nut 43 is threadedly connected to the screw portion, and nut 43 is pressed on the side of the wire clamping member 42 away from the limiting portion 411 or on the end of the mesh elastic sealing member 3 away from the connecting component 2, so as to tighten the end of the mesh elastic sealing member 3 away from the connecting component 2; the connecting thread portion is formed on the limiting portion 411 or simultaneously formed on the limiting portion 411 and the screw portion 412.

[0046] As can be seen from the structure described above, when the adapter component 4 provided in this application is used, the elastic braided wire at the end of the mesh elastic sealing member 3 away from the connecting component 2 is first installed between the wire clamping component 42 and the limiting component. Then, by tightening the nut 43, the elastic braided wire at the end of the mesh elastic sealing member 3 away from the connecting component 2 is pressed, thereby tightening and fixing the elastic braided wire at the end of the mesh elastic sealing member 3 away from the connecting component 2.

[0047] Furthermore, preferably, the connecting threaded part is a threaded hole, which facilitates the connecting threaded connection with the steel cable connecting assembly 5. Of course, it is not limited to this. The connecting threaded part can also be a stud, and a corresponding connecting stud can be provided on the steel cable connecting assembly 5. The specific choice depends on the actual needs. It should be noted that when the connecting threaded part is a threaded hole, this threaded hole is provided on the limiting part 411 and the screw part 412, or only on the limiting part 411. When the connecting threaded part is a screw part, it is provided on the side of the limiting part 411 away from the screw part 412.

[0048] In this embodiment, preferably, as follows: Figure 4 As shown, both sides of any slot 421 are through-type along the direction perpendicular to its depth, which makes it easier to snap the elastic braided wire at the end of the mesh elastic sealing member 3 into the slot 421. Of course, the slot 421 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.

[0049] In this embodiment, preferably, the connecting component 2 is formed with a second mounting groove, and one end of the mesh elastic sealing member 3 near the connecting component 2 is inserted into the second mounting groove (not shown in the figure).

[0050] As can be seen from the structure described above, the end of the mesh elastic sealing member 3 near the connecting component 2 is inserted into the second mounting groove, thus playing a role in connection and fixation.

[0051] Furthermore, preferably, the mesh elastic sealing element 3 and the connecting component 2 are connected by forging or welding, such as laser welding, argon arc welding, plasma welding, etc., to ensure that the converging bundle at the end of the mesh elastic sealing element 3 is tightly connected to the connecting component 2, thereby preventing the risk of detachment.

[0052] In this embodiment, preferably, the mesh elastic sealing element 3 and the connecting component 2 are connected by welding, such as laser welding, argon arc welding, or plasma welding, to ensure a tight connection between the mesh elastic sealing element 3 and the connecting component 2, thereby preventing the risk of detachment. This method is simple and convenient to operate, and helps improve production efficiency. Of course, this is not the only option; other connection methods can be used, depending on actual needs.

[0053] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the tail end of the spherical elastic support 1 is connected to the mesh elastic sealing member 3 via the connecting component 2. That is, the tail end of the spirally wound elastic braided yarn is connected to the mesh elastic sealing member 3, which facilitates the closing operation. In particular, the tail end can be inserted into the first mounting groove of the connecting component 2, and there are no excessive requirements for the tail end. Of course, it is not limited to this. In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the spherical elastic support 1 is woven from a single elastic braided filament, and each elastic braided filament comprises one elastic braided filament. In other words, the spherical elastic support 1 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 from a single elastic braided filament. Furthermore, it should be noted that the spherical elastic support 1 can also be composed of several parts, each woven from different elastic braided filaments, which can then be welded, heat-fused, or connected together using other methods.

[0054] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the mesh elastic 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 mesh elastic 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; it can also be woven from multiple elastic braided filaments joined together. Furthermore, it should be noted that the mesh elastic 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, the spherical elastic support 1 is covered with a flow-blocking membrane (not shown in the figure) to block the flow and prevent blood and other liquids from entering the interior of the auricle 7. Preferably, the flow-blocking membrane is sewn onto the spherical elastic support 1 by sutures.

[0056] In this embodiment, preferably, the mesh elastic sealing member 3 is covered with a flow-blocking membrane (not shown in the figure) to block the flow and prevent blood and other liquids from entering the interior of the auricle 7. Preferably, the flow-blocking membrane is sewn onto the mesh elastic sealing member 3 by sutures.

[0057] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the centerlines of the spherical elastic support 1, connecting component 2, mesh elastic sealing component 3, and adapter component 4 coincide, resulting in a more harmonious overall structure and a more secure and stable fit with the left atrial appendage 7, avoiding issues such as tilting or loose fit. Furthermore, it should be noted that the aforementioned left atrial appendage 7 generally refers to the left atrial appendage, but is not limited to this.

[0058] 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 spring occluder that adapts to the shape of the atrial appendage, characterized in that, include: A spherical elastic support, a connecting assembly, and a mesh elastic sealing element; wherein the spherical elastic support is connected to the mesh elastic sealing element through the connecting assembly, and the spherical elastic support is a structure in which elastic braided filaments are spirally wound into a spherical shape, and the mesh elastic sealing element is a hollow mesh cage structure woven from elastic braided filaments.

2. The adaptive atrial appendage morphology spring occluder according to claim 1, characterized in that, The end of the spherical elastic support that is away from the connecting component is the distal end, and the distal end is a smooth sphere without sharp edges.

3. The adaptive atrial appendage morphology spring occluder according to claim 2, characterized in that, The distal end is formed into a smooth sphere without sharp edges by welding.

4. The adaptive atrial appendage morphology spring occluder according to claim 1, characterized in that, The connecting assembly includes a first connecting member and a second connecting member; wherein the second connecting member has an auxiliary mounting groove, the end of the spherical elastic support near the connecting assembly is a proximal end, and the proximal end is wrapped around the outside of the first connecting member and inserted into the auxiliary mounting groove.

5. The adaptive atrial appendage morphology spring occluder according to claim 4, characterized in that, The proximal end of the spherical elastic support is connected to the first connecting member and the second connecting member by welding.

6. The adaptive atrial appendage morphology spring occluder according to claim 1, characterized in that, The mesh elastic sealing member is a disc-shaped mesh cage structure; the mesh elastic sealing member includes a first woven mesh section, a second woven mesh section, and a sidewall woven mesh section; wherein, the spherical elastic support member, the connecting component, and the mesh elastic sealing 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 arranged close to the 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.

7. The adaptive atrial appendage morphology spring occluder according to claim 6, characterized in that, Both the first woven mesh section and the second woven mesh section are disc-shaped.

8. The adaptive atrial appendage morphology spring occluder according to claim 1, characterized in that, The adaptive atrial appendage morphology spring occluder further includes an adapter assembly, which is connected to the end of the mesh elastic occluder that is away from the connecting assembly; the adapter assembly has a connecting thread and is used for threaded connection with the cable connecting assembly.

9. The adaptive atrial appendage morphology spring occluder according to claim 8, characterized in that, The adapter assembly includes a support member, a locking member, and a nut; wherein the support member includes a limiting part and a screw part connected together; wherein the locking member and the nut are both sleeved on the screw part, and the locking member is disposed close to the limiting part; The end of the mesh elastic sealing member away from the connecting assembly is disposed between the wire clamping member and the limiting part or between the wire clamping member and the nut, and the end of the wire clamping member near the mesh elastic sealing member away from the connecting assembly is provided with multiple slots. The nut is threadedly connected to the screw portion, and the nut is pressed onto the side of the wire clamping member away from the limiting portion or onto the end of the mesh elastic sealing member away from the connecting assembly, so as to tighten the end of the mesh elastic sealing member away from the connecting assembly; the connecting thread portion is formed on the limiting portion or simultaneously on the limiting portion and the screw portion.

10. The adaptive atrial appendage morphology spring occluder according to claim 9, characterized in that, Each of the aforementioned slots is through-type on both sides along a direction perpendicular to its depth direction; and / or The connecting threaded part is a threaded hole.

11. The adaptive atrial appendage morphology spring occluder according to any one of claims 1 to 10, characterized in that, The connecting assembly has a second mounting groove, and one end of the mesh elastic sealing member near the connecting assembly is inserted into the second mounting groove. The mesh elastic sealing member is connected to the connecting assembly by forging or welding. The mesh elastic sealing element is connected to the connecting assembly by welding; and / or The tail end of the spherical elastic support is connected to the mesh elastic sealing member via the connecting assembly; and / or The spherical elastic support is made of shape memory metal; and / or The mesh elastic sealing element is made of shape memory metal material; and / or The spherical elastic support is woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament; and / or The mesh-like elastic sealing element is woven from a single elastic braided filament, and each elastic braided filament includes at least one elastic braided filament; and / or The spherical elastic support is externally covered with a flow-blocking membrane; and / or The mesh-like elastic sealing element is externally covered with a flow-blocking membrane; and / or The centerlines of the spherical elastic support, the connecting assembly, and the mesh elastic sealing member coincide.

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