Patent foramen ovale occluder, patent foramen ovale occlusion system and method thereof

Abstract

The present invention discloses a patent foramen ovale occluder, a patent foramen ovale occlusion system and a method thereof. The first connecting part is connected with the second connecting part, so that the first occluding disc and the second occluding disc are installed on a conveying member, so that the first occluding disc and the second occluding disc can be smoothly placed in the right atrium and the left atrium; then the first occluding disc and the second occluding disc are squeezed to connect the first connecting member and the second connecting member, so that the first occluding disc and the second occluding disc are respectively installed in the right atrium and the left atrium smoothly, stably and safely in a rivet-free fixing manner, thereby facilitating the stable occlusion of the foramen ovale. At the same time, the first connecting member and the second connecting member are respectively located in the first accommodating cavity and the second accommodating cavity, effectively preventing the surface of the first occluding disc and the second occluding disc from causing damage to the surrounding tissues. In this way, the patent foramen ovale occluder can stably and safely occlude the foramen ovale.

Description

Technical Field

[0001] The present invention relates to the technical field of patent foramen ovale, and in particular to a patent foramen ovale occluder, a patent foramen ovale occluding system and a method thereof. Background Art

[0002] Patent ovale (PFO) mainly occurs during the development of young children. When the embryo develops to the 6th to 7th week, the atrial septum gives off two septa. The first septum is called the primary septum or the first septum, and the second septum is called the secondary septum or the second septum. The primary septum grows from the dorsal wall of the atrium midline in a semilunar shape, grows toward the atrioventricular canal and fuses with the endocardial cushion, leaving a small hole at the tail end of the atrioventricular septum, called the primary foramen. Before the primary foramen is closed, a hole is formed near the head end of the primary septum, called the secondary foramen, which is the normal channel for blood during the fetal period. At the same time, a sickle-shaped septum grows from the atrial wall on the right side of the first septum, called the secondary septum or the second septum. This septum does not continue to grow and stops halfway to separate the atria. The sickle-shaped depression is oval and is called the oval fossa. The primary septum and the secondary septum at the oval fossa fail to adhere and fuse, leaving a small gap called the oval foramen. After a newborn is born, the left atrial pressure increases, causing the left primary septum to adhere to the right secondary septum, resulting in functional closure, which is anatomically closed within 1 year. If the foramen ovale in a child over 3 years old still does not close, it is called patent foramen ovale.

[0003] In order to close the foramen ovale, the traditional treatment method usually uses a PFO occluder to occlude the foramen ovale. However, since the traditional PFO occluder is fixed with a rivet structure, and the rivet structure protrudes outside the occlusion disk, it is easy to touch the surrounding tissues during the occlusion process, causing damage to the surrounding tissues, thereby causing complications. Summary of the invention

[0004] Based on this, it is necessary to provide a patent foramen ovale occluder, a patent foramen ovale occlusion system and a method thereof, which can stably and safely occlude the foramen ovale.

[0005] The technical solution is as follows:

[0006] A patent foramen ovale occluder comprises: a first occluding disk, wherein the first occluding disk is provided with a first accommodating cavity and a socket, a first connecting piece is provided on the inner side wall of the first accommodating cavity, and a first channel connected to the socket is provided on the first connecting piece; and a second occluding disk, wherein the second occluding disk is connected to the first occluding disk and the second occluding disk is provided with a second accommodating cavity, a second connecting piece is provided on the inner side wall of the second accommodating cavity, and a second channel is provided on the second connecting piece, the second channel is used to insert a conveying piece through the socket and the first channel in sequence, a first connecting part is provided on the inner side wall of the second channel, and the first connecting part is used to be detachably connected to the second connecting part on the conveying piece; when the first occluding disk and the second occluding disk are squeezed, the first connecting piece is connected and matched with the second connecting piece.

[0007] The above-mentioned patent foramen ovale occluder is connected by the first connecting part and the second connecting part, so that the first occluding disc and the second occluding disc are installed on the conveying member, so that the first occluding disc and the second occluding disc can be smoothly placed in the right atrium and the left atrium; then by squeezing the first occluding disc and the second occluding disc, the first connecting member and the second connecting member are connected, so that the first occluding disc and the second occluding disc are stably installed in the right atrium and the left atrium, respectively, which is conducive to the stable occlusion of the foramen ovale. At the same time, the first connecting member and the second connecting member are respectively located in the first accommodating cavity and the second accommodating cavity, which effectively prevents the surface of the first occluding disc and the second occluding disc from causing damage to the surrounding tissues. In this way, the patent foramen ovale occluder can stably and safely occlude the foramen ovale.

[0008] In one embodiment, the first connecting member is provided with a first buckle portion, and the second connecting member is provided with a second buckle portion buckled with the first buckle portion.

[0009] In one embodiment, the first snap-on portion is a protrusion, the second snap-on portion is a groove, the protrusion is arranged on the inner side wall of the first channel, and the groove is arranged on the side of the second connecting member; or the first snap-on portion is a groove, the second snap-on portion is a protrusion, the groove is arranged on the side of the first connecting member, and the protrusion is arranged on the inner side wall of the second channel.

[0010] In one embodiment, the first connecting member is provided with a first thread, the second connecting member is provided with a second thread corresponding to the first thread, and a limiting member is provided on the inner side wall of the first channel, and the limiting member is used to cooperate with the limiting groove on the tightening member.

[0011] In one embodiment, the first blocking disk includes a first woven mesh and a first blocking membrane installed on the first woven mesh, the first woven mesh and the first blocking membrane enclose the first accommodating cavity, and the socket is arranged on the first woven mesh.

[0012] In one embodiment, the second occluding disk includes a second woven mesh and a second occluding membrane installed on the second woven mesh, and the second woven mesh and the second occluding membrane enclose the second accommodating cavity.

[0013] In one embodiment, an end of the second connecting member away from the second woven mesh is arranged to penetrate the second blocking membrane.

[0014] In one embodiment, the patent foramen ovale occluder further includes a third occluding membrane and a third woven mesh formed into a tubular shape, wherein the third occluding membrane is mounted on the inner wall of the third woven mesh, and the first occluding disk and the second occluding disk are connected via the third woven mesh.

[0015] A patent foramen ovale occlusion system comprises a conveying member, a loader, a sheath tube and the patent foramen ovale occluder described above, wherein the conveying member is provided with a second connection portion detachably connected to the first connection portion, the loader is used to load the patent foramen ovale occluder into the sheath tube, and the sheath tube is used to be inserted into the atrium.

[0016] The patent foramen ovale occlusion system described above can safely and smoothly deliver the patent foramen ovale occluder into the atrium through the conveyor, loader and sheath, and then pull back the conveyor to complete the placement, extrusion and connection of the first occluding disc and the second occluding disc in the atrium, thereby greatly facilitating the occlusion operation of the foramen ovale. At the same time, the patent foramen ovale occluder described above can stably and safely occlude the foramen ovale, thereby effectively avoiding the occurrence of complications after the occlusion of the foramen ovale.

[0017] A method for occluding a patent foramen ovale, using the above patent foramen ovale occlusion system, comprises the following steps: inserting the transmission member through the insertion port into the first channel and the second channel so that the first connection portion is connected to the second connection portion, and loading the transmission member connected with the patent foramen ovale occluder into the loader; after loading the transmission member, inserting the sheath tube through the loader, pushing the transmission member into the atrium, and making the first occluding disk located in the right atrium, and the second occluding disk located in the left atrium; pulling back the transmission member so that the first occluding disk and the second occluding disk are squeezed, and the first connection member is connected to the second connection member; after the first connection member is connected to the second connection member, disconnecting the first connection portion and the second connection portion, so that the transmission member is disconnected from the patent foramen ovale occluder, and withdrawing the sheath tube from the atrium.

[0018] The above-mentioned patent foramen ovale occlusion method adopts the above patent foramen ovale occlusion system to stably and safely occlude the foramen ovale. At the same time, the patent foramen ovale occlusion method makes it more convenient for operators to perform occlusion operations on the foramen ovale, greatly improving the occlusion efficiency and success rate of the foramen ovale. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A cross-sectional view of the structure of a patent foramen ovale occluder according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A magnified schematic diagram of the structure at the center circle A;

[0021] Figure 3 for Figure 1 A magnified schematic diagram of the structure at the middle circle B;

[0022] Figure 4 It is a cross-sectional view of the patent foramen ovale occluder structure after being fastened according to an embodiment of the present invention;

[0023] Figure 5 for Figure 4 A magnified schematic diagram of the structure at the center circle C;

[0024] Figure 6 It is a cross-sectional view of the structure of a patent foramen ovale occluder according to another embodiment of the present invention;

[0025] Figure 7 for Figure 6 A magnified schematic diagram of the structure at D in the middle circle;

[0026] Figure 8 for Figure 6 A magnified schematic diagram of the structure at the middle circle E;

[0027] Fig. 9 It is a cross-sectional view of the patent foramen ovale occluder structure after being screwed together according to another embodiment of the present invention;

[0028] Fig.10 for Fig. 9 A magnified schematic diagram of the structure at F in the middle circle;

[0029] Fig.11 A cross-sectional view of a patent foramen ovale occluder according to another embodiment of the present invention;

[0030] Fig.12 It is a schematic structural diagram of a patent foramen ovale occlusion system when the second occlusion disk is opened according to an embodiment of the present invention;

[0031] Fig.13It is a schematic structural diagram of a patent foramen ovale occlusion system when the first occluding disk and the second occluding disk are opened according to an embodiment of the present invention;

[0032] Fig.14 It is a schematic structural diagram of a patent foramen ovale occlusion system when squeezing a second occlusion disk according to an embodiment of the present invention;

[0033] Fig.15 It is a schematic structural diagram of a patent foramen ovale occlusion system when squeezing a first occluding disk and a second occluding disk according to an embodiment of the present invention;

[0034] Fig.16 for Fig.15 A magnified schematic diagram of the structure at the middle circle G;

[0035] Fig.17 It is a schematic structural diagram of a patent foramen ovale occlusion system when squeezing a first occluding disk and a second occluding disk according to another embodiment of the present invention;

[0036] Fig.18 for Fig.17 A magnified schematic diagram of the structure at H in the middle circle;

[0037] Fig.19 It is a partial structural schematic diagram of a tightening member according to an embodiment of the present invention;

[0038] Fig. 20 This is a schematic diagram of the structure of a first connecting member according to an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 100. Patent foramen ovale occluder, 110. First occluding disk, 111. First braided mesh, 1111. Socket, 112. First occluding membrane, 113. First accommodating cavity, 120. Second occluding disk, 121. Second braided mesh, 122. Second occluding membrane, 123. Second accommodating cavity, 130. Third braided mesh, 131. Third occluding membrane, 140. First connecting member, 141. First channel, 142. First buckle portion, 143. First thread, 144. Limiting member, 150. Second connecting member, 151. Second channel, 152. First connecting portion, 153. Second buckle portion, 154. Second thread, 200. Transmitting member, 210. Second connecting portion, 300. Loader, 400. Sheath, 500. Tightening member, 510. Limiting groove. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0045] In one embodiment, please refer to Figures 1 to 12 , a patent foramen ovale occluder 100, comprising: a first occluding disk 110 and a second occluding disk 120. The first occluding disk 110 is provided with a first accommodating cavity 113 and a socket 1111. The inner side wall of the first accommodating cavity 113 is provided with a first connecting member 140. The first connecting member 140 is provided with a first channel 141 connected to the socket 1111. The second occluding disk 120 is connected to the first occluding disk 110, and the second occluding disk 120 is provided with a first accommodating cavity 113 and a second accommodating cavity 123. A second connecting member 150 is provided on the inner side wall of the second accommodating cavity 123. The second connecting member 150 is provided with a second channel 151. The second channel 151 and the first channel 141 are used to insert a transmission member 200 through the socket 1111. A first connecting portion 152 is provided on the inner side wall of the second channel 151. The first connecting portion 152 is used to be detachably connected to the second connecting portion 210 on the transmission member 200. When the first sealing disk 110 and the second sealing disk 120 are squeezed, the first connecting member 140 and the second connecting member 150 are connected and matched.

[0046] The patent foramen ovale occluder 100 is connected to the second connecting portion 210 via the first connecting portion 152, so that the first occluding disc 110 and the second occluding disc 120 are mounted on the conveying member 200, so that the first occluding disc 110 and the second occluding disc 120 can be smoothly placed in the right atrium and the left atrium; and then the first occluding disc 110 and the second occluding disc 120 are squeezed to connect the first connecting member 140 and the second connecting member 150, so that the first occluding disc 110 and the second occluding disc 120 are stably installed in the right atrium and the left atrium, respectively. Therefore, this embodiment uses a clever structural design to enable the first occluding disc 110 and the second occluding disc 120 to be smoothly, stably and safely installed in the atrium by a rivet-free fixing method, thereby avoiding the traditional rivet structure remaining in the body and causing long-term complications, thereby stably occluding the foramen ovale. At the same time, the first connecting member 140 and the second connecting member 150 are respectively located in the first accommodating chamber 113 and the second accommodating chamber 123, which effectively prevents the first occluding disc 110 and the second occluding disc 120 from causing damage to the surrounding tissues. In this way, the foramen ovale is stably and safely blocked by the patent foramen ovale occluder 100. In addition, the first accommodating chamber 113 and the second accommodating chamber 123 are connected to each other, so that the transmission member 200 can pass from the first channel 141 to the second channel 151. Specifically in this embodiment, the first connecting member 140 and the second connecting member 150 are both degradable parts with good biocompatibility, which effectively avoids the occurrence of complications caused by remaining in the body, such as arrhythmia, valve damage, residual shunt, thrombosis and other long-term complications.

[0047] For further information, please refer to Figures 1 to 5 , a first buckle portion 142 is provided on the first connecting member 140. A second buckle portion 153 is provided on the second connecting member 150 to buckle with the first buckle portion 142. It can be seen that when the first occluding disc 110 and the second occluding disc 120 are located in the right atrium and the left atrium respectively, the first connecting member 140 is brought closer to the second connecting member 150 by squeezing the first occluding disc 110 and the second occluding disc 120, and the first connecting member 140 is tightly connected to the second connecting member 150 by buckling with the first buckle portion 142 and the second buckle portion 153, so that the patent foramen ovale occluder 100 can achieve stable occlusion of the foramen ovale by a rivet-free fixing method.

[0048] Furthermore, the first snap-on portion 142 is a protrusion. The second snap-on portion 153 is a groove. The protrusion is arranged on the inner side wall of the first channel 141. The groove is arranged on the side of the second connecting member 150. In this way, the first connecting member 140 and the second connecting member 150 are tightly connected by the cooperation between the protrusion and the groove. Alternatively, the first snap-on portion 142 is a groove. The second snap-on portion 153 is a protrusion. The groove is arranged on the side of the first connecting member 140. The protrusion is arranged on the inner side wall of the second channel 151.

[0049] In one embodiment, please refer to Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.19 and Fig. 20 , a first thread 143 is provided on the first connecting member 140. A second thread 154 corresponding to the first thread 143 is provided on the second connecting member 150. A limiting member 144 is provided on the inner side wall of the first channel 141. The limiting member 144 is used to cooperate with the limiting groove 510 on the tightening member 500. It can be seen that when the first occluding disk 110 and the second occluding disk 120 are squeezed, the first connecting member 140 moves closer to the second connecting member 150 and contacts the second connecting member 150. Then, through the limiting groove 510 on the tightening member 500, the limiting member 144 in the first channel 141 can be used to twist the tightening member 500 so that the first connecting member 140 and the second connecting member 150 are threadedly connected. In this way, the patent foramen ovale occluder 100 is stably installed in the atrium, so that the patent foramen ovale occluder 100 can achieve stable occlusion of the foramen ovale. Specifically in the embodiment, the first thread 143 is disposed on the inner side wall of the first channel 141, and the second thread 154 is disposed on the side of the second connector 150. Alternatively, the first thread 143 is disposed on the side of the first connector 140, and the second thread 154 is disposed on the inner side wall of the second channel 151.

[0050] In one embodiment, the first blocking disk 110 includes a first woven mesh 111 and a first blocking film 112 mounted on the first woven mesh 111 . The first woven mesh 111 and the first blocking film 112 enclose a first accommodating cavity 113 , and the socket 1111 is disposed on the first woven mesh 111 .

[0051] Optionally, the first woven mesh 111 and the first blocking film 112 are both degradable, and the materials of the first woven mesh 111 and the first blocking film 112 are polycarbonate, polyanhydride, polyglycolic acid, polylactic acid, polyhydroxybutyrate or other degradable materials.

[0052] Specifically, the materials of the first woven mesh 111 and the first occluding membrane 112 are both poly L-lactic acid (PLLA), so that the first occluding disk 110 is degradable as a whole and has good biocompatibility, thereby avoiding the occurrence of long-term complications caused by remaining in the human body.

[0053] In one embodiment, the second blocking disk 120 includes a second woven mesh 121 and a second blocking film 122 mounted on the second woven mesh 121. The second woven mesh 121 and the second blocking film 122 enclose a second accommodating cavity 123.

[0054] Optionally, the second woven mesh 121 and the second blocking film 122 are both degradable, and the materials of the second woven mesh 121 and the second blocking film 122 are both polycarbonate, polyanhydride, polyglycolic acid, polylactic acid, polyhydroxybutyrate or other degradable materials.

[0055] Specifically, the materials of the second woven mesh 121 and the second occluding membrane 122 are both poly-lactic acid (PLLA), so that the second occluding disk 120 is degradable as a whole and has good biocompatibility, thereby avoiding the occurrence of long-term complications caused by remaining in the human body.

[0056] For further information, please refer to Fig.11 , one end of the second connecting member 150 away from the second braided mesh 121 penetrates the second blocking film 122. It can be seen that when the second connecting portion 210 on the transmission member 200 is connected to the first connecting portion 152, since the second connecting member 150 penetrates the second blocking film 122, the transmission member 200 does not need to penetrate the second blocking film 122. In this way, the transmission member 200 is effectively prevented from damaging the second blocking film 122, which is beneficial to maintaining the integrity of the second blocking film 122, thereby facilitating the improvement of the occlusion success rate of the patent foramen ovale occluder 100.

[0057] In one embodiment, the patent foramen ovale occluder 100 further includes a third occluding membrane 131 and a third braided mesh 130 formed into a tubular shape. The third occluding membrane 131 is mounted on the inner side wall of the third braided mesh 130. The first occluding disc 110 and the second occluding disc 120 are connected through the third braided mesh 130. Among them, the first occluding disc 110, the third braided mesh 130 and the second occluding disc 120 of this embodiment are an integrated structure.

[0058] Optionally, the third woven mesh 130 and the third blocking film 131 are both degradable, and the materials of the third woven mesh 130 and the third blocking film 131 are both polycarbonate, polyanhydride, polyglycolic acid, polylactic acid, polyhydroxybutyrate or other degradable materials.

[0059] Specifically, the materials of the third woven mesh 130 and the third occluding film 131 are both poly L-lactic acid (PLLA), so that the third woven mesh 130 and the second occluding film 131 have good biocompatibility, avoiding the occurrence of long-term complications caused by remaining in the human body.

[0060] In one embodiment, please refer to Figures 12 to 20, a patent foramen ovale occlusion system, comprising a conveyor 200, a loader 300, a sheath tube 400 and a patent foramen ovale occluder 100 in any of the above embodiments. The conveyor 200 is provided with a second connection portion 210 detachably connected to the first connection portion 152. The loader 300 is used to load the patent foramen ovale occluder 100 into the sheath tube 400. The sheath tube 400 is used to be inserted into the atrium.

[0061] The above-mentioned patent foramen ovale occlusion system, through the transmission member 200, the loader 300 and the sheath 400, safely and smoothly delivers the patent foramen ovale occluder 100 into the atrium, and then pulls back the transmission member 200, so that the first occluding disk 110 and the second occluding disk 120 are placed, squeezed and connected in the atrium, thereby greatly facilitating the occlusion operation of the foramen ovale. At the same time, through the above-mentioned patent foramen ovale occluder 100, the foramen ovale is stably and safely blocked, thereby effectively avoiding the occurrence of complications after the occlusion of the foramen ovale. Specifically in the present embodiment, the transmission member 200 is a steel cable, and the first connecting portion 152 and the second connecting portion 210 are both threaded structures.

[0062] For further information, please refer to Fig.17 , Fig.18 , Fig.19 and Fig. 20 The patent foramen ovale occlusion system also includes a tightening member 500. The tightening member 500 is sleeved on the outside of the conveying member 200, and the tightening member 500 is used to be loaded into the sheath tube 400 through the loader 300. A limiting groove 510 is provided on the tightening member 500, and a limiting member 144 that cooperates with the limiting groove 510 is provided on the inner side wall of the first channel 141. When the conveying member 200 is pulled back, the first occluding disk 110 and the second occluding disk 120 are squeezed, and the first connecting member 140 and the second connecting member 150 are close to each other. At this time, the tightening member 500 is clamped on the first occluding disk 110 through the limiting groove 510 and the limiting member 144. The tightening member 500 is twisted so that the first connecting member 140 and the second connecting member 150 are threadedly connected, thereby achieving the fixation of the patent foramen ovale occluder 100.

[0063] In one embodiment, a method for occluding a patent foramen ovale is provided, using the patent foramen ovale occlusion system in the above embodiment, and comprising the following steps: inserting the transmission member 200 through the socket 1111 into the first channel 141 and the second channel 151, so that the first connection portion 152 is connected to the second connection portion 210, and loading the transmission member 200 connected with the patent foramen ovale occluder 100 into the loader 300. After the transmission member 200 is installed, the sheath 400 is inserted through the loader 300, and the transmission member 200 is pushed into the atrium, so that the first occluding disk 110 is located in the right atrium, and the second occluding disk 120 is located in the left atrium. By pulling back the transmission member 200, the first occluding disk 110 and the second occluding disk 120 are squeezed, and the first connecting member 140 is connected to the second connecting member 150. After the first connecting member 140 is connected to the second connecting member 150 , the first connecting portion 152 and the second connecting portion 210 are disconnected, so that the transmission member 200 is disconnected from the patent foramen ovale occluder 100 , and the sheath tube 400 is withdrawn from the atrium.

[0064] The above-mentioned patent foramen ovale occlusion method adopts the above patent foramen ovale occlusion system to stably and safely occlude the foramen ovale. At the same time, the patent foramen ovale occlusion method makes it more convenient for operators to perform occlusion operations on the foramen ovale, greatly improving the occlusion efficiency and success rate of the foramen ovale.

[0065] Specifically, the step of connecting the first connecting member 140 and the second connecting member 150 includes snap connection of the first connecting member 140 and the second connecting member 150, and thread connection of the first connecting member 140 and the second connecting member 150. The blocking process for connecting the first connecting member 140 and the second connecting member 150 by snap connection is as follows: using the sheath tube 400 as a resistance, pulling back the transmission member 200, so that the second blocking disk 120 is squeezed first, which can be referred to Fig.14 Then by pulling back the conveying member 200, the first blocking disk 110 is squeezed, which can be referred to Fig.15At this time, the first connecting member 140 is stuck on the second connecting member 150. Among them, since the second occluding disk 120 of this embodiment cannot automatically return to its shape before loading like the memory alloy, it will unfold into a "gourd" shape after the sheath 400 is pushed in. Therefore, it is necessary to pull back the conveying member 140 so that the second occluding disk 120 can be tightened and formed into the final state that fits the atrial wall. The occluding process for the first connecting member 140 and the second connecting member 150 to be connected in a threaded manner is as follows: using the sheath 400 as a resistance, pull back the conveying member 200 so that the second occluding disk 120 is squeezed first; then pull back the conveying member 200 so that the first occluding disk 110 is squeezed. At this time, the first connecting member 140 conflicts with the second connecting member 150. Similarly, since the first occluding disk 110 of this embodiment cannot automatically return to its shape before loading like the memory alloy, the sheath 400 is pushed in. After the tube 400 is opened, it will unfold into a shape like a "gourd". Therefore, the first occluding disk 110 can be tightened and formed into a final state that fits the atrial wall only after the transmission member 140 is pulled back; then, the tightening member 500 sleeved on the outside of the transmission member 200 is inserted into the sheath tube 400, and the tightening member 500 is clamped on the first connecting member 140 through the limiting groove 510 and the limiting member 144. The tightening member 500 is twisted to make the first connecting member 140 and the second connecting member 150 threadedly connected. Fig.18 .

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A patent foramen ovale occluder, characterized in that: include: A first blocking disk, wherein a first accommodating cavity and a socket are provided on the first blocking disk, a first connecting piece is provided on the inner side wall of the first accommodating cavity, and a first channel connected to the socket is provided on the first connecting piece; A second blocking disk, the second blocking disk is connected to the first blocking disk, and a second accommodating cavity is provided on the second blocking disk, the second accommodating cavity is communicated with the first accommodating cavity, a second connecting piece is provided on the inner side wall of the second accommodating cavity, a second channel is provided on the second connecting piece, the second channel is used to insert the transmission piece through the socket and the first channel in sequence, a first connecting part is provided on the inner side wall of the second channel, the first connecting part is used to be detachably connected to the second connecting part on the transmission piece; when the first blocking disk and the second blocking disk are squeezed, the first connecting piece is connected and matched with the second connecting piece; The first blocking disk includes a first braided mesh and a first blocking film installed on the first braided mesh, the first braided mesh and the first blocking film enclose the first accommodating cavity, and the socket is arranged on the first braided mesh; The second blocking disk includes a second braided mesh and a second blocking film installed on the second braided mesh, the second braided mesh and the second blocking film enclose the second accommodating cavity, and an end of the second connecting member away from the second braided mesh penetrates the second blocking film; The patent foramen ovale occluder also includes a third occluding membrane and a third woven mesh that is tubular, the third occluding membrane is mounted on the inner wall of the third woven mesh, and the first occluding disk and the second occluding disk are connected via the third woven mesh.

2. The patent foramen ovale occluder according to claim 1, characterized in that: The first connecting member is provided with a first buckle portion, and the second connecting member is provided with a second buckle portion buckled with the first buckle portion.

3. The patent foramen ovale occluder according to claim 2, characterized in that: The first snap-on portion is a protrusion, and the second snap-on portion is a groove, the protrusion is arranged on the inner side wall of the first channel, and the groove is arranged on the side of the second connecting member; or the first snap-on portion is a groove, and the second snap-on portion is a protrusion, the groove is arranged on the side of the first connecting member, and the protrusion is arranged on the inner side wall of the second channel.

4. The patent foramen ovale occluder according to claim 1, characterized in that: The first connecting member is provided with a first thread, the second connecting member is provided with a second thread corresponding to the first thread, and the inner side wall of the first channel is provided with a limiting member, and the limiting member is used to cooperate with the limiting groove on the tightening member.

5. A patent foramen ovale closure system, characterized in that: It comprises a conveying member, a loader, a sheath tube and the patent foramen ovale occluder according to any one of claims 1 to 4, wherein the conveying member is provided with a second connecting portion detachably connected to the first connecting portion, the loader is used to load the patent foramen ovale occluder into the sheath tube, and the sheath tube is used to be inserted into the atrium.

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