Plugging device

Abstract

The invention relates to the technical field of medical instruments, in particular to a plugging device which comprises an anchoring disc and a plugging disc, and a supporting net of the plugging disc is formed by weaving a plurality of left-handed supporting wires and a plurality of right-handed supporting wires; when the left-hand supporting wire is carried outside the right-hand supporting wire, the carrying cross point is a left-hand cross point, and when the right-hand supporting wire and the left-hand supporting wire are carried outside, the carrying cross point is a right-hand cross point; the left-handed cross points and the right-handed cross points are distributed at intervals in pairs; the sewing thread bypasses the carrying cross point, then extends into the inner cavity and penetrates through the plugging film, and the carrying cross point bypassed by the sewing thread is a sewing cross point; when the plugging disc is in a flattened state, a carrying cross point is arranged between every two adjacent sewing cross points. According to the invention, the closing and unfolding smoothness of the plugging disc is high.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an occluder. Background Art

[0002] Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia clinically, with an incidence of 0.5% to 1.3% in the general population. The primary hazard of AF is the promotion of thrombosis, which can lead to complications such as stroke and peripheral vascular embolism, significantly increasing disability and mortality. Medically, catheter-based occluders can be placed in the left atrial appendage (LAA) to prevent thrombosis caused by AF and prevent it from traveling to the brain and causing stroke.

[0003] An occluder typically includes an anchoring disc and an occluding disc connected to the anchoring disc. The anchoring disc is used to secure the occluder in the left atrial appendage, and the occluding disc is used to occlude the left atrial appendage. The occluding disc includes a support mesh and an occluding membrane mounted within the support mesh, which is sewn to the support mesh using sutures. In the prior art, the sutures bypass all grid intersections on the same circumference, resulting in a long suture length. During the process of inserting the occluder into the catheter (or sheath), the occluding membrane and sutures have many folded portions. Furthermore, the friction between the sutures and the support mesh is high, resulting in a large resistance to sheath retraction. When the occluder is extended and released from the catheter (or sheath), the occluder's expansion rebound force is low, which can easily lead to the occluder not being able to fully flatten. The occluder may also partially bulge, causing the upper and lower disc surfaces of the occluder to separate, affecting the occlusion procedure. More seriously, if the occluder bulges during implantation and release, the left atrial appendage cannot be completely occluded. Summary of the Invention

[0004] The embodiment of the present invention provides an occluder to solve the technical problems of the occluder in the prior art, such as instability in folding and unfolding.

[0005] An occluder provided in one embodiment of the present invention includes an occluder disk, wherein the occluder disk includes an occluder membrane, a suture, a support mesh, and a proximal end cap and a distal end cap mounted at opposite ends of the support mesh; Along the direction from the distal end seal to the proximal end seal, the support mesh includes a plurality of left-handed support wires and a plurality of right-handed support wires, and the left-handed support wires and the right-handed support wires are woven into a grid structure; When the left-handed supporting wire is carried on the outside of the right-handed supporting wire, the carrying intersection between the left-handed supporting wire and the right-handed supporting wire is a left-handed intersection; when the right-handed supporting wire is carried on the outside of the left-handed supporting wire, the carrying intersection between the right-handed supporting wire and the left-handed supporting wire is a right-handed intersection; along the direction of the same left-handed supporting wire or the right-handed supporting wire, the left-handed intersection and the right-handed intersection are spaced apart in pairs; The occluding membrane is installed in the inner cavity of the supporting mesh, and the suture passes around the carrying intersection and then extends into the inner cavity and passes through the occluding membrane. The carrying intersection around which the suture passes is named a sewing intersection; When the occlusion disc is in a flattened state, all the sewing intersections are located on at least one circumference, and on the same circumference, all the sewing intersections are evenly distributed, and there is at least one carrying intersection between two adjacent sewing intersections.

[0006] Optionally, along the extension line direction of the same left-handed supporting wire, the sewing intersection is located between the left-handed intersection and the right-handed intersection.

[0007] Optionally, the sewing intersection and the adjacent end carrying intersection are carried in different ways, and the adjacent end carrying intersection is a carrying intersection adjacent to the sewing intersection toward one end of the proximal end head.

[0008] Optionally, when the occlusion disc is in a flattened state, the support mesh has multiple circles of concentrically distributed carrying intersections, all of the sewn intersections are located on at least one circumference, and one circle of the sewn intersections is located on the outermost circle of carrying intersections.

[0009] Optionally, at least one connection group is provided on the occluding disk, each of the connection groups includes a plurality of connection parts located on the same circumference, and the suture is a continuous suture passing through the connection parts in sequence.

[0010] Optionally, on the same circumference, the distance between two adjacent connecting portions is equal.

[0011] Optionally, relative to the mounting intersection of the outermost circle of the sealing disk, the connecting portion is correspondingly arranged between the mounting intersections of the inner circle adjacent to the mounting intersection of the outermost circle.

[0012] Optionally, the sealing disk is further provided with a limit line, one end of the limit line is connected to the sealing membrane, and the other end of the limit line is connected to the proximal end seal or the distal end seal.

[0013] Optionally, on the same circumference, all the sewing intersections are left-hand intersections, and the adjacent end mounting intersections are right-hand intersections.

[0014] Optionally, the occluder further includes an anchoring plate connected to the distal head, the anchoring plate includes a flow-blocking membrane and a plurality of annularly spaced anchoring hooks, all of the anchoring hooks are connected to the distal head, and the flow-blocking membrane connects all the anchoring hooks.

[0015] In the present invention, the support net is a grid structure woven from multiple left-handed support wires and multiple right-handed support wires; the left-handed support wire is mounted on the outside of the right-handed support wire at a left-handed intersection, and the right-handed support wire is mounted on the outside of the left-handed support wire at a right-handed intersection, and the left-handed intersection and the right-handed intersection are spaced apart in pairs; one left-handed support wire is mounted on the outside of the two right-handed support wires and then extends into the inside of the two right-handed support wires, and then is mounted on the outside of the two right-handed support wires; similarly, one right-handed support wire is mounted on the outside of the two left-handed support wires and then extends into the inside of the two left-handed support wires, and then is mounted on the outside of the two left-handed support wires. The left-handed support wire does not need to bypass the right-handed support wires one by one, and the right-handed support wire does not need to bypass the left-handed support wires one by one. The left-handed support wire and the right-handed support wire have a larger bypass space, so that the structure of the support net is simple, the manufacturing cost is low, and it has good elasticity and ductility.

[0016] In addition, the suture passes around the carrying intersection and then extends into the inner cavity of the support mesh and passes through the occluding membrane. The carrying intersection around which the suture passes is named a sewing intersection. When the occluding disc is in a flattened state, all the sewing intersections are located on at least one circumference, and on the same circumference, all the sewing intersections are evenly distributed, and there is at least one carrying intersection between two adjacent sewing intersections. The suture is sewn to the occluding membrane using a skipping method. The length of the suture is relatively short. During the process of the occluding disc being retracted into the sheath or catheter, the suture will abut against the opening edge of the sheath or catheter. Since the portion of the suture exposed outside the supporting mesh is relatively small, the friction between the suture and the sheath or catheter is relatively small, thereby ensuring the smoothness of the occluding disc being retracted into the sheath or catheter. There are fewer overlaps between the suture and the supporting mesh, which reduces the friction between the suture and the supporting mesh, thereby reducing the resistance encountered by the supporting mesh during retraction and improving the smoothness of the retraction of the supporting mesh. The supporting mesh is used to sew the occluding membrane in a jump-grid manner, and the connection parts between the suture and the occluding membrane are relatively few, thereby facilitating the sewing of the occluding membrane into the inner cavity of the supporting mesh; and the distance between two adjacent connection parts between the suture and the occluding membrane is relatively large. When the occluding disk is in a retracted state, the area of the overlapping part of the occluding membrane is relatively large, thereby ensuring the stability of the occluding membrane when retracted into the supporting mesh and ensuring the smoothness of the occluding membrane when it is unfolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic structural diagram of an occluder provided in one embodiment of the present invention; Figure 2 This is a structural schematic diagram of the occluder provided by one embodiment of the present invention when the occluding disc is in a flattened state; Figure 3 This is a structural schematic diagram of the occluder provided by one embodiment of the present invention when the occluding disk is in a partially retracted state; Figure 4 This is a partial enlarged view of an occlusion disk of an occlusion device provided by one embodiment of the present invention in a partially retracted state; Figure 5 yes Figure 4 A partial enlarged view of a suture of an occluder disk sliding toward the proximal end cap is provided; Figure 6 This is a partial enlarged view of another occluding disk of the occluding device provided by one embodiment of the present invention in a partially retracted state; Figure 7 This is a partial enlarged view of another occlusion disk of the occlusion device provided by one embodiment of the present invention in a partially retracted state; Figure 8 This is a partial enlarged view of another occlusion disk of the occlusion device provided by one embodiment of the present invention in a partially retracted state; Figure 9 This is a partial enlarged view of another occlusion disk of the occlusion device provided by one embodiment of the present invention in a partially retracted state; Figure 10 is a schematic diagram of a left-hand intersection provided by an embodiment of the present invention; Figure 11 is a schematic diagram of a right-hand intersection provided by one embodiment of the present invention; Figure 12 is a schematic diagram of a blocking membrane provided by one embodiment of the present invention; Figure 13 is a schematic diagram of another blocking membrane provided by one embodiment of the present invention; Figure 14 It is a schematic structural diagram of an occluder disc partially retracted into a sheath tube according to an embodiment of the present invention.

[0019] The reference numerals in the specification are as follows: 1. Anchoring disc; 11. Blocking membrane; 12. Anchoring hook; 121. Anchor barb; 2. Sealing disc; 21. Sealing membrane; 211. Connecting part; 22. Suture; 23. Support mesh; 231. Left-handed supporting wire; 232. Right-handed supporting wire; 233. Left-handed intersection; 234. Right-handed intersection; 235. Sewing intersection; 24. Proximal end cap; 25. Distal end cap; 3. Push cable. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] like Figures 1 to 4 As shown, an occluder provided by one embodiment of the present invention is described using a left atrial appendage occluder as an example. In other embodiments, the occluder may be an occluder having a waist occluding structure, such as a patent foramen ovale occluder or an atrial septal occluder. The occluder of this embodiment includes an occluding disc 2, which includes an occluding membrane 21, a suture 22, a supporting mesh 23, and a proximal end cap 24 and a distal end cap 25 installed at opposite ends of the supporting mesh 23. Along the direction of the distal head 25 toward the proximal head 24, the support mesh 23 includes a plurality of left-handed support wires 231 and a plurality of right-handed support wires 232, and the left-handed support wires 231 and the right-handed support wires 232 are woven into a grid structure; it can be understood that the left-handed support wires 231 and the right-handed support wires 232 overlap each other, and memory shape alloy materials such as nickel-titanium wire can be used, and a disc-shaped structure is formed through heat treatment.

[0022] When the left-handed supporting wire 231 is carried on the outside of the right-handed supporting wire 232, the carrying intersection between the left-handed supporting wire 231 and the right-handed supporting wire 232 is a left-handed intersection 233; when the right-handed supporting wire 232 is carried on the outside of the left-handed supporting wire 231, the carrying intersection between the right-handed supporting wire 232 and the left-handed supporting wire 231 is a right-handed intersection 234; along the direction of the same left-handed supporting wire 231 or the right-handed supporting wire 232, the left-handed intersections 233 and the right-handed intersections 234 are spaced apart in pairs; it can be understood that the two left-handed intersections 233 form a group of left-handed intersections, and the two right-handed intersections 234 form a group of right-handed intersections, and the left-handed intersection groups and the right-handed intersection groups are each provided with a plurality and are spaced apart in sequence.

[0023] The occluding membrane 21 is installed in the inner cavity of the supporting net 23, and the suture 22 bypasses the carrying intersection and extends into the inner cavity and passes through the occluding membrane 21. The carrying intersection bypassed by the suture 22 is named as the sewing intersection 235; it can be understood that the suture 22 is carried on the outside of the sewing intersection 235, and the sutures 22 at both ends of the sewing intersection 235 extend into the inner cavity and pass through the occluding membrane 21; the sewing intersection 235 can be a left-handed intersection 233 or a right-handed intersection 234.

[0024] When the occlusion disk 2 is in a flattened state, all of the sewing intersections 235 are located on at least one circumference, and on the same circumference, all of the sewing intersections 235 are evenly distributed, and there is at least one carrying intersection between two adjacent sewing intersections 235. It can be understood that the occlusion disk 2 is in a flattened state, that is, the occlusion disk 2 is in a free state, and the occlusion disk 2 is released in the left atrial appendage. To further illustrate, the connection between the suture 22 and the occlusion disk 2 can be located on one circumference, or on at least two coaxially distributed circumferences.

[0025] In the present invention, the support net 23 is a grid structure woven by multiple left-handed support wires 231 and multiple right-handed support wires 232; the left-handed support wire 231 is mounted on the outside of the right-handed support wire 232 at a left-handed intersection 233, and the right-handed support wire 232 is mounted on the outside of the left-handed support wire 231 at a right-handed intersection 234, and the left-handed intersection 233 and the right-handed intersection 234 are spaced apart in pairs; one left-handed support wire 231 is mounted on the outside of the two right-handed support wires 232 and then extends into the inside of the two right-handed support wires 232, and then is mounted on the outside of the two right-handed support wires 232; similarly, one right-handed support wire 232 is mounted on the outside of the two left-handed support wires 231 and then extends into the inside of the two left-handed support wires 231, and then is mounted on the outside of the two left-handed support wires 231. The left-handed support wire 231 does not need to bypass the right-handed support wire 232 one by one, and the right-handed support wire 232 does not need to bypass the left-handed support wire 231 one by one. The left-handed support wire 231 and the right-handed support wire 232 have a large bypass space, so that the support net 23 has a simple structure, low manufacturing cost, and good elasticity and ductility.

[0026] In addition, the suture 22 passes around the carrying intersection and then extends into the inner cavity of the support mesh 23 and passes through the occluding membrane 21. The carrying intersection around which the suture 22 passes is named a sewing intersection 235. When the occluding disk 2 is in a flattened state, all the sewing intersections 235 are located on at least one circumference, and on the same circumference, all the sewing intersections 235 are evenly distributed, and there is at least one carrying intersection between two adjacent sewing intersections 235. The suture 22 is sewn to the occluding membrane 21 by a skipping method. The length of the suture 22 is relatively short. During the process of the occluding disk 2 being retracted into the sheath or catheter, the suture 22 will abut against the opening edge of the sheath or catheter. Since the portion of the suture 22 exposed outside the supporting mesh 23 is relatively small, the friction between the suture 22 and the sheath or catheter is relatively small, thereby ensuring the smoothness of the occluding disk 2 being retracted into the sheath or catheter. There are fewer overlaps between the sutures 22 and the support mesh 23, which reduces the friction between the sutures 22 and the support mesh 23, thereby reducing the resistance encountered during the retraction of the support mesh 23 and improving the smoothness of the retraction of the support mesh 23. The support mesh 23 is sewn with the occluding membrane 21 in a skipped manner, and the connection portions 211 between the sutures 22 and the occluding membrane 21 are fewer, which facilitates the sewing of the occluding membrane 21 into the inner cavity of the support mesh 23. The distance between two adjacent connection portions 211 between the sutures 22 and the occluding membrane 21 is large. When the occluding disc 2 is in the retracted state, the overlapping area of the occluding membrane 21 is large, ensuring the stability of the occluding membrane 21 when it is retracted within the support mesh 23 and ensuring the smoothness of the occluding membrane 21 when it is deployed.

[0027] In one embodiment, if Figure 1As shown, along the extension line direction of the same left-handed support wire 231, the sewing intersection 235 is located between the left-handed intersection 233 and the right-handed intersection 234, and the sewing intersection 235 is carried differently from the adjacent end carrying intersection. The adjacent end carrying intersection is the carrying intersection adjacent to the sewing intersection 235 toward one end of the proximal end head 24. It can be understood that the adjacent end carrying intersection is also a kind of carrying intersection; along the direction of the same left-handed support wire 231 or the right-handed support wire 232, the adjacent end carrying intersection is adjacent to the sewing intersection 235; specifically, when the sewing intersection 235 is the left-handed intersection 233, along the direction of the same left-handed support wire 231, the carrying intersection adjacent to the distal end head 25 of the sewing intersection 235 is the left-handed intersection 233, and the sewing intersection 235 is adjacent to the proximal end head 24. The adjacent loading intersection is a right-handed intersection 234 (that is, the adjacent end loading intersection is a right-handed intersection 234); when the sewing intersection 235 is a right-handed intersection 234, along the direction of the same left-handed supporting wire 231, the sewing intersection 235 toward the distal head 25 and the adjacent loading intersection is a right-handed intersection 234, and the sewing intersection 235 toward the proximal head 24 and the adjacent loading intersection is a left-handed intersection 233 (that is, the adjacent end loading intersection is a left-handed intersection 233).

[0028] Preferably, in this embodiment, the sewing intersection 235 of this embodiment is selected as the left-hand intersection 233, and its adjacent end carrying intersection is the right-hand intersection 234, and the right-hand support wire 232 at the adjacent end carrying intersection is carried on the outside of the left-hand support wire 231, and the right-hand support wire 232 protrudes from the surface of the left-hand support wire 231 to form a blocking portion, please refer to Figure 5 In the process of retracting the occluding disc 2 into the sheath or catheter, the suture 22 easily slides toward the proximal head 24. Since the sewing intersection 235 and the carrying intersection toward one end of the proximal head 24 are carried in different ways, the left-handed supporting wire 231 will extend from the outside of the supporting mesh 23 to the inside of the supporting mesh 23, and the adjacent end carrying intersection toward one end of the proximal head 24 will block the suture 22 from sliding toward a position farther away from the sewing intersection 235, so that the suture 22 can only slide a distance of one grid at most. When the occluding disc 2 is extended from the sheath or catheter, the suture 22 can only slide a distance of one grid at most, which limits the sliding displacement of the suture 22, ensures the smoothness of the occluding disc 2 when it is unfolded, and reduces the probability of local bulging of the occluding disc 2.

[0029] In one embodiment, if Figures 2 to 9As shown, when the occluder disc 2 is in a flattened state, the support mesh 23 has a plurality of concentrically distributed carrying intersections, all of the sewing intersections 235 are located on at least one circumference, and one circle of the sewing intersections 235 is located on the carrying intersections of the outermost circle. It can be understood that when all of the sewing intersections 235 are on the same circumference, all of the carrying intersections are located on the carrying intersections of the outermost circle, as shown in FIG. Figures 2 to 4 As shown, at this time, when the support net 23 changes from the folded state to the flattened state, the support net 23 exerts a large pulling force on the blocking film 21, so that the blocking film 21 can be smoothly flattened in the support net 23. Figure 6-Figure 9 As shown, when all the sewing intersections 235 are located on at least two concentrically distributed circles, and a group of the sewing intersections 235 in the outermost circle are located on the carrying intersections of the outermost circle, and one or more groups of the sewing intersections 235 in the inner circle are located on the carrying intersections of the outermost circle close to the proximal end 24, an occluding disk 2 is formed in which the sutures 22 jump through multiple grids to suture the occluding membrane 21; at this time, on the same circumference, the length of the sutures 22 is shorter, and in the process of the occluding disk 2 being retracted into the sheath or catheter, the sutures 22 will abut against the opening edge of the sheath or catheter. Since the portion of the sutures 22 exposed outside the supporting mesh 23 is small, the friction between the sutures 22 and the sheath or catheter is small, thereby ensuring the smoothness of the occluding disk 2 being retracted into the sheath or catheter. A single suture 22 is used to continuously sew the intersections 235 of the outermost and inner circles. The suture 22 and the support mesh 23 have fewer overlaps, reducing friction between them and thereby reducing resistance encountered during the retraction of the support mesh 23 and improving the smoothness of the retraction of the support mesh 23. The support mesh 23 is sewn with the occluding membrane 21 in a skipped pattern, resulting in fewer connection points 211 between the suture 22 and the occluding membrane 21, facilitating the sewing of the occluding membrane 21 within the inner cavity of the support mesh 23. Furthermore, the distance between adjacent connection points 211 between the suture 22 and the occluding membrane 21 is relatively large. When the occluding disc 2 is in the retracted state, the overlapping area of the occluding membrane 21 is relatively large, ensuring the stability of the occluding membrane 21 within the support mesh 23 and ensuring smooth deployment of the occluding membrane 21.

[0030] In one embodiment, if Figure 4 and Figure 6 ,as well as Figure 12 and Figure 13 As shown, the occluding disk 2 is provided with at least one connection group, each of which includes a plurality of connection portions 211 located on the same circumference, and the sutures 22 are continuous sutures 22 that pass through the connection portions 211 in sequence. Figure 12As shown in FIG, when there is only one connection group, all the connection parts 211 are located on the same circumference, so that the suture 22 can stretch the occluding membrane 21 from all sides, further ensuring the smoothness of the occluding membrane 21 being unfolded in the supporting net 23, and connecting the suture 22 to the occluding membrane 21 only through a single circle connection group can avoid curling of the occluding membrane 21; Figure 13 As shown, when there are at least two connecting portions 211 , and all the connecting portions 211 are located on at least two circumferences, all the connecting portions 211 constitute at least two concentrically distributed circumferences.

[0031] Specifically, if Figure 4 As shown, when the occluder disk 2 has only one connection group, one end of the suture 22 is carried from the outside on the sewing intersection 235 and then extends into the inner cavity of the support mesh 23 and passes through the connecting portion 211. The suture 22 then extends into the outside of the support mesh 23 and bypasses the next sewing intersection 235 and then extends into the inner cavity of the support mesh 23. The suture 22 passes through the next connecting portion 211 and extends into the outside of the support mesh 23. This cycle is repeated until the suture 22 bypasses the support mesh 23 once and is connected to the other end of the suture 22. At this time, all the sewing intersections 235 are located on the same circumference to form a spiral suture line.

[0032] like Figure 6 As shown, when the occluding disk 2 has only two connection groups, all the sewing intersections 235 form two concentrically distributed circles; one end of the suture 22 is mounted on a sewing intersection 235 of the outer circle from the outside and then extends into the inner cavity of the support mesh 23, the suture 22 passes through a connecting portion 211 of the outer circle of the occluding disk 2 and then extends into the outside of the support mesh 23, the suture 22 is then mounted on a sewing intersection 235 of the inner circle from the outside and then extends into the inner cavity of the support mesh 23, the suture 22 passes through a connecting portion 211 of the inner circle of the occluding membrane 21 and then extends into the support mesh 23. The outside of the occluding disk 2 is carried from the outside to the next sewing intersection 235 of the outer circle and then extends into the inner cavity of the support mesh 23. The suture 22 passes through the next connecting portion 211 of the outer circle of the occluding disk 2 and then extends into the outside of the support mesh 23. The suture 22 is then carried from the outside to the next sewing intersection 235 of the inner circle and then extends into the inner cavity of the support mesh 23. The suture 22 passes through the next connecting portion 211 of the inner circle of the occluding membrane 21 and then extends into the outside of the support mesh 23. This cycle is repeated until the suture 22 bypasses the support mesh 23 and is connected to the other end of the suture 22.

[0033] In one embodiment, if Figures 4 to 9As shown, on the same circumference, the distances between two adjacent connecting portions 211 are equal; the sutures 22 can evenly stretch the occluding membrane 21 from all sides, further ensuring the smoothness of the occluding membrane 21 being unfolded in the supporting net 23 .

[0034] In one embodiment, the sealing disk 2 is further provided with a limiting wire (not shown), one end of which is connected to the sealing membrane 21, and the other end of which is connected to the proximal end cap 24. Preferably, the end of the limiting wire, distal from the proximal end cap 24, is connected to the center of the sealing membrane 21. In this embodiment, during the retraction of the sealing disk 2, the limiting wire can pull the sealing membrane 21 toward one end of the proximal end cap 24, thereby allowing the sealing membrane 21 to be retracted within the support mesh 23 toward the proximal end cap 24.

[0035] In one embodiment, if Figure 4 As shown, on the same circumference, all the sewing intersections 235 are left-hand intersections 233, and the adjacent end carrying intersection is the right-hand intersection 234. It can be understood that toward one end of the distal end cap 25, the carrying intersection adjacent to the sewing intersection 235 is the left-hand intersection 233.

[0036] In one embodiment, if Figure 1 As shown, the occluder also includes an anchor plate 1, which is connected to the distal end cap 25. The anchor plate 1 includes a flow barrier 11 and a plurality of annularly spaced anchor hooks 12. All of the anchor hooks 12 are connected to the distal end cap 25, and the flow barrier 11 is connected to all of the anchor hooks 12. In this case, the occluder is a left atrial appendage occluder. It is understood that all of the anchor hooks 12 are in a bent state. Preferably, the distance between two adjacent anchor hooks 12 is equal. In this embodiment, the design of the multiple anchor hooks 12 facilitates the support and fixation of the occluder in the atrial appendage wall and facilitates the folding of the anchor plate 1 into a sheath or catheter. When the anchor plate 1 is extended from the sheath or catheter, all of the anchor hooks 12 can spread out from all sides, and the anchor spikes 121 will penetrate into the patient's left atrial appendage, thereby ensuring the stability of the occluder placed in the patient's left atrial appendage.

[0037] In one embodiment, if Figure 14 As shown, the occluder further includes a push cable 3, which is detachably connected to the proximal end cap 24. It is understandable that the push cable 3 and the proximal end cap 24 can be connected via a threaded structure, and the push cable 3 can push the occluder and place it in the patient's left atrial appendage.

[0038] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. An occluder, characterized in that: The occluding disk comprises an occluding membrane, sutures, a supporting net, and a proximal end cap and a distal end cap mounted at opposite ends of the supporting net; Along the direction from the distal end seal to the proximal end seal, the support mesh includes a plurality of left-handed support wires and a plurality of right-handed support wires, and the left-handed support wires and the right-handed support wires are woven into a grid structure; When the left-handed supporting wire is carried on the outside of the right-handed supporting wire, the carrying intersection between the left-handed supporting wire and the right-handed supporting wire is a left-handed intersection; when the right-handed supporting wire is carried on the outside of the left-handed supporting wire, the carrying intersection between the right-handed supporting wire and the left-handed supporting wire is a right-handed intersection; along the direction of the same left-handed supporting wire or the right-handed supporting wire, the left-handed intersection and the right-handed intersection are spaced apart in pairs; The occluding membrane is installed in the inner cavity of the supporting mesh, and the suture passes around the carrying intersection and then extends into the inner cavity and passes through the occluding membrane. The carrying intersection around which the suture passes is named a sewing intersection; When the occlusion disc is in a flattened state, all the sewing intersections are located on at least one circumference, and on the same circumference, all the sewing intersections are evenly distributed, and there is at least one carrying intersection between two adjacent sewing intersections.

2. The occluder according to claim 1, characterized in that: Along the extension line direction of the same left-handed supporting wire, the sewing intersection point is located between the left-handed intersection point and the right-handed intersection point.

3. The occluder according to claim 1, characterized in that: The sewing intersection is different from the adjacent end carrying intersection in a carrying manner. The adjacent end carrying intersection is a carrying intersection adjacent to the sewing intersection toward one end of the proximal end seal.

4. The occluder according to claim 1, characterized in that: When the occlusion disc is in a flattened state, the support mesh has multiple circles of concentrically distributed carrying intersections, all of the sewing intersections are located on at least one circumference, and one circle of the sewing intersections is located on the outermost circle of the carrying intersections.

5. The occluder according to claim 1, characterized in that: At least one connection group is provided on the occluding disk, and each of the connection groups includes a plurality of connection parts located on the same circumference, and the sutures are continuous sutures that pass through the connection parts in sequence.

6. The occluder according to claim 5, characterized in that: On the same circumference, the distances between two adjacent connecting portions are equal.

7. The occluder according to claim 5, characterized in that: With respect to the mounting intersections of the outermost circle of the occluding disk, the connecting portions are correspondingly arranged between the mounting intersections of the inner circle adjacent to the mounting intersections of the outermost circle.

8. The occluder according to claim 1, characterized in that The sealing disk is further provided with a limit line, one end of the limit line is connected to the sealing membrane, and the other end of the limit line is connected to the proximal end seal or the distal end seal.

9. The occluder according to claim 3, characterized in that: On the same circumference, all the sewing intersections are left-hand intersections, and the adjacent end carrying intersections are right-hand intersections.

10. The occluder according to claim 1, characterized in that: The occluder further includes an anchoring disc connected to the distal end cap. The anchoring disc includes a flow-blocking membrane and a plurality of annularly spaced anchoring hooks. All the anchoring hooks are connected to the distal end cap, and the flow-blocking membrane connects all the anchoring hooks.

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