CN217186237U - Tissue defect plugging device and tissue defect plugging device - Google Patents

Abstract

The utility model relates to a defective plugging device of tissue and defective plugging device of tissue. The tissue defect occluder comprises an occluder body. The stopper body comprises a first clamping disc, a connecting piece and a second clamping disc. When the occluder body is in an unfolding state, the first clamping disc and the second clamping disc are mutually attached and are positioned on the same plane. A first hollowed-out opening is formed in the disc surface of the first clamping disc, and a second hollowed-out opening is formed in the disc surface of the second clamping disc. The first clamping plate and the second clamping plate are close to each other through the torque between the first clamping plate and the connecting piece, so that the first chamber interval and the second chamber interval between the first clamping plate and the second clamping plate are close to each other and are attached tightly, the aim of sealing the oval hole is finally achieved, and the plugging effect is good. In addition, because the first hollow-out opening is formed on the first clamping disc, and the second hollow-out opening is formed on the second clamping disc, the metal material implanted into the body is less, so that the complication of thrombosis can be avoided, and adverse reaction is not easy to cause.

Description

Tissue defect occlusion device and tissue defect occluder

technical field

The utility model relates to the technical field of medical suturing instruments, in particular to a tissue defect sealing device and a tissue defect sealing device.

Background technique

The foramen ovale is a physiological channel in the cardiac atrial septum in the embryonic stage. The fetus has no pulmonary circulation, and oxygenated blood from the umbilical cord flows from the right atrium of the fetus through the foramen ovale into the left atrium. After birth, with the establishment of pulmonary circulation, the pressure of the left atrium increases, and the secondary septum and the primary septum approach each other, adhere and fuse, and gradually form a permanent atrial septum. However, there are still some people who do not fuse, and form a patent foramen ovale (referred to as PFO). In most cases, the pressure in the left atrium of the human heart is greater than that in the right atrium, and the PFO is closed. In some specific cases, the PFO channel can be pushed open so that the right and left atria are preceded by access. The emboli from the venous system may enter the systemic circulation through the PFO channel. If the cerebral arterial system is embolized, it will manifest as stroke or transient ischemic attack (TIA).

A common, transcatheter closure method for patent foramen ovale is the implantation of a PFO occluder. A PFO occluder usually consists of two discs (defined as left disc and right disc respectively) and a thin waist connecting the two discs. Occluders are usually made of superelastic metallic materials such as Nitinol. It can be compressed into a slender strip, and delivered to the atrial septum from the outside of the body along the vascular path through a delivery catheter. After delivery to the designated location, the PFO occluder is released from the delivery catheter and returns to its original two-disk, one-waist form. The two disc surfaces are attached to the left and right atrial sides respectively, and the waist is placed in the PFO channel. So that the secondary septum and the primary septum are close to each other and merge. After the device is implanted, the endothelium will gradually grow, eventually wrapping the entire PFO occluder to form a complete occlusion.

In the traditional technology, two circular or other regular-shaped clamping discs of the PFO occluder are used to block the holes at both ends of the foramen ovale, so as to close the foramen ovale and block blood flow. However, the foramen ovale is a flat and narrow tunnel formed by the dislocation of two unconnected atrial septa, so when the traditional PFO occluder is used to close the foramen ovale, first, the surgical operation is very complicated; second, It is also because the double disc cannot be completely released after molding, and the flow cannot be completely blocked, resulting in the failure of product sealing; 3. Due to the high metal implant, complications such as thrombosis are often prone to occur.

Utility model content

The utility model provides a tissue defect sealing device and a tissue defect sealing device to solve one or more technical problems in the prior art.

Its technical scheme is as follows: a tissue defect occluder, wherein the tissue defect occluder comprises an occluder body, and the occluder body is a memory material;

The occluder body includes a first clamping disc, a connecting piece and a second clamping disc, the first clamping disc is connected with the second clamping disc through the connecting piece; when the occluder is When the body is in a stretched state, the first clamping disc and the second clamping disc are attached to each other and are on the same plane, or a gap is provided between the first clamping disc and the second clamping disc;

A first hollow opening is formed on the disk surface of the first clamping disk, and a second hollow opening is formed on the disk surface of the second clamping disk.

In one embodiment, the outline of the first clamping disk is in a star shape, a petal shape, a triangle or a polygon; the outline of the second clamping disk is in a star shape, a petal shape, a triangle or a polygon.

In one embodiment, the first clamping disc is wound with a first memory wire to form its outline, the connecting member is a second memory wire, and the second clamping disc is formed by a third memory wire The outline is formed by winding; the first memory wire, the second memory wire and the third memory wire are connected in sequence.

In one embodiment, the first memory wire, the second memory wire and the third memory wire are connected to form an integrated structure; the first memory wire, the second memory wire The material and the third memory wire are the same kind of wire.

In one embodiment, the first clamping plate, the connecting member and the second clamping plate are combined to form an integrated structure.

In one embodiment, when the occluder body is in an incompletely stretched state, the connecting members are respectively arranged at an included angle with the first clamping plate and the second clamping plate.

In one of the embodiments, the gap is defined as d, which is set to be less than 1 mm.

In one embodiment, when the occluder body is in a fully stretched state, the first clamping disc and the second clamping disc are stretched into an elongated strip shape.

In one embodiment, the occluder body is memory alloy or memory metal.

In one embodiment, the occluder body is provided with barbs.

In one embodiment, at least two of the barbs are arranged at intervals on the first clamping disc; at least two barbs are arranged at intervals on the connecting member; the second clamping disc At least two of the barbs are arranged at an upper interval.

In one embodiment, the barbs are provided on the side of the first clamping disc facing the second clamping disc, and the barbs on the first clamping disc face the One end of the first clamping plate connected to the connecting piece is inclined and arranged;

The barb is provided on the side of the connecting piece facing the first clamping plate, and the barb on the side of the connecting piece facing the first clamping plate faces the connecting piece one end connected with the first clamping plate is inclined;

The barb is provided on the side of the connecting piece facing the second clamping disc, and the barb on the side of the connecting piece facing the second clamping disc faces the connecting piece one end connected with the second clamping plate is inclined;

The barb is provided on the side of the second clamping disc facing the first clamping disc, and the barb on the second clamping disc faces the second clamping disc and the barb. The connecting ends of the connecting pieces are arranged obliquely.

A tissue defect sealing device, the tissue defect sealing device comprises the tissue defect sealing device; the tissue defect sealing device further comprises a conveying device and a pushing assembly, the sealing device body and the pushing The components are connected and arranged inside the conveying device.

The above-mentioned tissue defect occlusion device and tissue defect occluder, when for example the foramen ovale is closed, the occluder body is compressed and placed in the delivery device, and the occluder body is sent to the right atrium through the blood vessel, so that the The delivery device passes through the foramen ovale tunnel, and the delivery device releases the first clamping disc, so that the first clamping disc is attached to the outside of the first interatrial septum of the left atrium; the delivery device is withdrawn from the foramen ovale tunnel, and the occluder The first clamping disc of the body remains stationary, and then the connecting piece is released and placed in the tunnel of the foramen ovale; the conveying device is further withdrawn, and the second clamping disc is released, so that the second clamping disc is closely attached to the second clamping disc of the right atrium. Outside the second room septum. Wherein, since the body of the occluder is a memory material, when the first clamping disc and the connecting piece and the second clamping disc and the connecting piece are separated from each other, the connecting part between the first clamping disc and the connecting piece, as well as the first clamping disc and the connecting piece, and the The connection between the two clamping discs and the connecting piece generates a torque to restore the original shape. In this way, the first clamping disc and the second clamping disc have a tendency to approach each other through the torque between the connecting pieces, so that the first interatrial septum and the second interatrial septum are close to each other, and finally a closed oval is achieved. The purpose of the hole, the sealing effect is better, and the surgical operation is relatively simple. In addition, because the first clamping disc is formed with a first hollow opening, and the second clamping disc is formed with a second hollow opening, so that less metal material is implanted in the body, metal implants in the body are reduced, and thrombus formation is reduced. It can reduce the probability of abnormal reaction and avoid serious consequences such as stroke caused by thrombosis; secondly, reduce the metal ions released by the occluder, especially nickel ions, to avoid increasing the probability of cancerous cells; at the same time, reduce the volume of the tissue defect occluder, Further, the volume of the delivery sheath is reduced, the smoothness of the delivery sheath entering the human body is improved, and the injury to the human body caused by the operation is reduced.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments of the present invention and descriptions thereof are used to explain the present invention and do not constitute an improper limitation of the present invention.

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic structural diagram of a working state of a tissue defect occluder according to an embodiment of the present invention;

2 is a schematic structural diagram of a working state of a tissue defect occluder according to another embodiment of the present invention;

3 is a schematic structural diagram of a tissue occluder according to an embodiment of the present invention;

4 is a schematic structural diagram of a tissue occluder according to another embodiment of the present invention;

5 is a schematic structural diagram of a first clamping disc of a tissue occluder according to an embodiment of the present invention;

6 is a schematic structural diagram of a first clamping disc of a tissue occluder according to another embodiment of the present invention;

7 is a schematic structural diagram of a first clamping disc of a tissue occluder according to another embodiment of the present invention;

8 is a schematic structural diagram of a first clamping disc of a tissue occluder according to another embodiment of the present invention;

9 is a schematic structural diagram of a first clamping disc of a tissue occluder according to another embodiment of the present invention;

10 is a schematic structural diagram of a first clamping disc of a tissue occluder according to another embodiment of the present invention.

10. The body of the occluder; 11. The first clamping plate; 111. The first hollow port; 112, the first notch; 12, the connecting piece; 13, the second clamping plate; The second gap; 20, the first interatrial septum; 30, the second interatrial septum; 40, the tunnel; 50, the barb.

Detailed ways

In order to make the above objects, features and advantages of the present utility model more clearly understood, the specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not subject to the specific embodiments disclosed below. limit.

In order to achieve the correct flow blocking effect, the traditional PFO occluder usually uses metal wires, especially nickel-titanium wires, to be densely woven to form a blocking disk to protect and fix the blocking film located in the blocking disk. In this way, there will inevitably be a large number of metal implants in the body, which will greatly increase the probability of rejection reactions such as thrombosis, and then lead to serious consequences such as stroke; at the same time, metal implants will release a large amount of metal ions, especially nickel-titanium. Alloy, the free nickel ions released can significantly increase the cancerous probability of cells.

Based on this, please refer to FIG. 1 , FIG. 3 or FIG. 4 , FIG. 1 shows a schematic view of the working state structure of the tissue defect occluder according to an embodiment of the present invention, and FIG. 3 shows a tissue sealer according to an embodiment of the present invention. Schematic diagram of the structure of the occluder, FIG. 4 shows a schematic diagram of the structure of the tissue occluder according to another embodiment of the present invention. Both the occluder body 10 shown in FIG. 3 and FIG. 4 are in an incompletely stretched state, and the difference is that the shapes of the first clamping disc 11 and the second clamping disc 13 are different. An embodiment of the present utility model provides a tissue defect sealing device. The tissue defect sealing device includes a tissue defect sealing device, which is suitable for patent foramen ovale suturing, blood vessel suturing, atrial septal defect suturing, and ventricular septal defect suturing Etc., a tissue defect occluder includes an occluder body 10 . The occluder body 10 is a memory material. The occluder body 10 includes a first clamping disc 11 , a connecting piece 12 and a second clamping disc 13 . The first clamping disc 11 is connected to the second clamping disc 13 via the connecting piece 12 . When the occluder body 10 is in the stretched state, the first clamping disc 11 and the second clamping disc 13 are attached to each other and are on the same plane, or there is a gap between the first clamping disc 11 and the second clamping disc 13 . A first hollow opening 111 is formed on the plate surface of the first clamping plate 11 , and a second hollow opening 131 is formed on the plate surface of the second clamping plate 13 .

For the above-mentioned tissue defect occluder, for example, when the foramen ovale is closed, the occluder body 10 is compressed and placed in the delivery device, the occluder body 10 is sent to the right atrium through the blood vessel, and the delivery device is passed through. In the foramen ovale tunnel 40, the delivery device releases the first clamping disc 11, so that the first clamping disc 11 is attached to the outside of the first interatrial septum 20 of the left atrium; the delivery device is withdrawn from the foramen ovale tunnel 40 and blocked The first clamping plate 11 of the device body 10 remains stationary, and then the connecting piece 12 is released and placed in the oval foramen tunnel 40; the conveying device is further withdrawn, and the second clamping plate 13 is released, so that the second clamping plate 13 is immediately lateral to the second interatrial septum 30 of the right atrium. Wherein, since the occluder body 10 is a memory material, when the first clamping disc 11 and the connecting piece 12 and the second clamping disc 13 and the connecting piece 12 are separated from each other, the first clamping disc 11 and the connecting piece 12 are separated from each other. The connecting portion between the two, and the connecting portion between the second clamping plate 13 and the connecting piece 12 generate a torque to restore the original shape. In this way, the first clamping plate 11 and the second clamping plate 13 tend to approach each other by the torque between the first clamping plate 11 and the second clamping plate 13, so that the first interatrial septum 20 and the second interatrial septum 30 between them are in close contact with each other, Finally, the purpose of sealing the foramen ovale is achieved, the sealing effect is good, and the surgical operation is relatively simple. In addition, since the first clamping plate 11 is formed with the first hollow opening 111, and the second clamping plate 13 is formed with the second hollow opening 131, the metal material implanted in the body is less, that is, the metal implant in the body is reduced, Reduce the probability of rejection reactions such as thrombosis, and avoid serious consequences such as stroke caused by thrombosis; secondly, reduce the metal ions released by the occluder, especially nickel ions, to avoid increasing the probability of cancerous cells; at the same time, it reduces tissue defects. The volume of the occluder is reduced, thereby reducing the volume of the delivery sheath, improving the smoothness of the delivery sheath entering the human body, and reducing the injury to the human body caused by the surgical operation.

Referring to FIGS. 3 to 10 , in one embodiment, the outline of the first clamping plate 11 includes, but is not limited to, a star shape (as shown in FIG. 5 ), a petal shape (as shown in FIGS. 3 and 6 ), Triangular (as shown in Figure 7) or polygon (as shown in Figures 4, 8 to 10). In addition, the contour of the second clamping disk 13 is similar in shape and structure to the first clamping disk 11 , including but not limited to being star-shaped, petal-shaped, triangular or polygonal. In this way, when the contours of the first clamping plate 11 and the second clamping plate 13 are designed to be regular shapes, the processing and forming of the first clamping plate 11 and the second clamping plate 13 can be facilitated, and the production efficiency is high.

It should be noted that the contour of the first clamping plate 11 can be flexibly set and adjusted arbitrarily according to the size and shape of the oval hole, and can be a regular shape or an irregular shape, as long as it is in conflict with the first chamber. When the outer side wall of the spacer 20, can play the effect of pressing the first atrial spacer 20; Similarly, the contour of the second clamping plate 13 can be flexibly set and adjusted according to the size and shape of the oval foramen, and can It is a regular shape or an irregular shape, as long as it can compress the second atrial septum 30 when it is in contact with the outer wall of the second atrial septum 30 .

In addition, it should be noted that the contour shape of the first clamping plate 11 may be the same as or different from the contour shape of the second clamping plate 13, which is not limited herein.

Referring to FIG. 3 or FIG. 4 , in one embodiment, the first clamping disc 11 is wound around the first memory wire to form its outline. In addition, the connecting member 12 is a second memory wire. In addition, the contour of the second clamping disc 13 is formed by the winding of the third memory wire. The first memory wire, the second memory wire and the third memory wire are connected in sequence. In this way, on the one hand, in the process of producing and processing the first clamping plate 11 , it can be obtained by winding the first memory wire to form its outline, and the area enclosed by the first memory wire is equivalent to the first hollow opening 111 . , that is, the first clamping plate 11 can be produced relatively quickly; in the same way, in the process of producing and processing the second clamping plate 13, it can be obtained by winding the third memory wire to form its outline, and at the same time the third memory wire can be obtained. The area enclosed by the wire is equivalent to the second hollow opening 131, that is, the second clamping disc 13 can be produced relatively quickly; on the other hand, the first clamping disc 11 and the second clamping disc 13 are both made of memory wire The material used is very small, so that less metal material is implanted in the body, which can avoid the complications of thrombosis, that is, it is not easy to cause adverse reactions. In addition, the first clamping disc 11 obtained by forming the first memory wire and the second clamping disc 13 obtained by forming the third memory wire can provide a sufficiently large compression under the connection of the connecting piece 12. force to close the first atrial septum 20 and the second atrial septum 30 together. In addition, when the occluder body 10 needs to be transported to the surgical site, the occluder body 10 can be easily stretched into an elongated shape and placed in a sheath tube with a smaller size.

It should be noted that the radial cross-sections of the first memory wire, the second memory wire, and the third memory wire include but are not limited to circles, ellipses, triangles, polygons, etc., and can be set according to actual needs . In addition, the first memory wire material, the second memory wire material, and the third memory wire material can all specifically adopt memory alloy or memory metal, etc.

In one embodiment, the first memory wire, the second memory wire and the third memory wire are connected to form an integrated structure. The first memory wire, the second memory wire and the third memory wire are the same kind of wire. In this way, using the same memory wire to form the first clamping plate 11, the connecting piece 12 and the second clamping plate 13 respectively, the processing and forming speed is faster, the production efficiency is higher, and the number of materials used is less, which is extremely harmful to the body. Small. Of course, the first memory wire, the second memory wire, and the third memory wire can also be made of different materials according to actual needs for integral processing, and the specific materials can be flexibly selected, which is not limited here.

Further, referring to FIGS. 3 to 10 , the outlines of the first clamping plate 11 and the second clamping plate 13 are both non-closed structures. In other words, the outline of the first clamping plate 11 is provided with a first The notch 112 and the outline of the second clamping plate 13 are both provided with a second notch 132 . That is, when the first clamping plate 11 is straightened, it forms a straight line, and when the second clamping plate 13 is straightened, it forms a straight line. One end of the straight line formed by the straightening of the first clamping plate 11 is a free end, the other end is connected to one end of the connecting piece 12, and the other end of the connecting piece 12 is connected to one end of the straight line formed by the straightening of the second clamping plate 13, and the second clamping plate 13 is straightened. The other end of the straight line formed by straightening the disk 13 is the free end. In this way, the first clamping disc 11, the connecting piece 12 and the second clamping disc 13, which are connected in sequence, can be simultaneously processed and formed using the same memory wire. The processing and forming speed is faster, the production efficiency is higher, and the number of materials used is less. , the damage to the body is minimal.

As an example, the second memory wire is, for example, a straight wire, an S-shaped wire, an L-shaped wire, a W-shaped wire, a Z-shaped wire, etc., and its specific shape is not limited here, as long as it can be placed It can be in the tunnel 40 formed by the first interatrial septum 20 and the second interatrial septum 30 . As a specific example, the second memory wire adopts a straight wire body, which can be easily placed in the tunnel 40 with a smaller size, and at the same time, the length of the wire body is short, and the metal material can be reduced as much as possible, thereby avoiding the formation of thrombosis. Complications, that is, less likely to cause adverse reactions.

Of course, as an optional solution, the first memory wire, the second memory wire, and the third memory wire can also be processed independently, and then combined to form an integrated structure by, for example, fusion connection.

It should be noted that, the first clamping plate 11 is not limited to being formed by using memory wires, but can also be, for example, a memory sheet, and the first hollow opening 111 is processed on the memory sheet; similarly, the second clamping plate 13 is not limited to being formed by using a memory wire material, for example, it can also be a memory sheet material, and the second hollow opening 131 is processed on the memory sheet material.

Referring to FIG. 1 again, in one embodiment, the first clamping plate 11 , the connecting member 12 and the second clamping plate 13 are combined to form an integrated structure. In this way, in the production process, the first clamping plate 11 , the connecting piece 12 and the second clamping plate 13 are integrally processed and formed, and the production efficiency is high.

Referring to FIG. 1 again, in one embodiment, when the occluder body 10 is not fully stretched, the connecting member 12 and the first clamping plate 11 and the second clamping plate 13 are respectively arranged at an included angle. In this way, the angle formed by the first clamping disc 11 and the connecting piece 12 can provide an elastic pressing force to make the first clamping disc 11 clamp the first interatrial septum 20 , and the second clamping disc 13 and the connecting piece 12 are in contact with each other. The formed angle can provide elastic pressing force to make the second clamping disc 13 clamp the second atrial septum 30 .

It should be noted that the incompletely stretched state refers to the state in which the occluder body 10 is only stretched to a certain extent, but is not stretched to the limit position; when the occluder body 10 is stretched to the limit position When the occluder body 10 is in the fully stretched state, the occluder body 10 will be stretched into an elongated shape at this time.

As an example, the first clamping disc 11 is parallel to the second clamping disc 13 when the occluder body 10 is in a partially stretched state. In this way, both the first clamping plate 11 and the second clamping plate 13 can run toward each other, and since the first clamping plate 11 is parallel to the second clamping plate 13, the first clamping plate 11 can be better clamped. The first atrial septum 20 and the second atrial septum 30 .

In one embodiment, the gap is defined as d (not shown), and d is set to be less than 1 mm. In this way, the gap d between the first clamping disc 11 and the second clamping disc 13 is small enough to make the first interatrial septum 20 and the second interatrial septum 30 close to each other, and finally achieve the purpose of closing the foramen ovale, blocking the The effect is better.

In one embodiment, when the occluder body 10 is in a fully stretched state, the first clamping disc 11 and the second clamping disc 13 are stretched into an elongated shape. In this way, when the occluder body 10 needs to be transported to the surgical site, the occluder body 10 can be stretched into a slender shape and placed in a sheath tube with a smaller size, through the sheath tube to pass through the blood vessel Delivery into the right atrium to the site of the tissue defect.

In one embodiment, the occluder body 10 is a memory alloy or memory metal. In this way, the use of memory alloys or memory metals has less damage to human tissue, and the memory alloys or memory metals are durable, have a longer service life, and lower costs. The memory alloys include but are not limited to titanium-nickel alloys, aluminum alloys, titanium alloys, and nickel alloys, which can be selected according to actual needs.

Referring to FIG. 2 , in one embodiment, the occluder body 10 is provided with barbs 50 . In this way, after the occluder body 10 is implanted in place, the barbs 50 are fixed on the interatrial septum, so that the occluder body 10 can be stably installed on the first atrial septum 20 and the second atrial septum 30, It will not easily escape from the first atrial septum 20 and the second atrial septum 30 .

Referring to FIG. 2 , in one embodiment, at least two barbs 50 are arranged on the first clamping plate 11 at intervals. At least two barbs 50 are arranged on the connecting piece 12 at intervals. At least two barbs 50 are arranged at intervals on the second clamping disc 13 . In this way, after the occluder body 10 is implanted in place, the barbs 50 are fixed on the interatrial septum, so that the occluder body 10 can be stably installed on the first atrial septum 20 and the second atrial septum 30, It will not easily escape from the first atrial septum 20 and the second atrial septum 30 .

Referring to FIG. 2 , in one embodiment, barbs 50 are provided on the side of the first clamping plate 11 facing the second clamping plate 13 , and the barbs 50 on the first clamping plate 11 face the first clamping plate 11 . One end of the clamping plate 11 connected with the connecting piece 12 is arranged obliquely. The side of the connecting piece 12 facing the first clamping disc 11 is provided with barbs 50 , and the barbs 50 on the side of the connecting piece 12 facing the first clamping disc 11 face the connecting piece 12 and the first clamping disc 11 . The connected end is set at an incline. In this way, after the occluder body 10 is installed in the foramen ovale tunnel 40 and the first atrial septum 20 and the second atrial septum 30 are closely combined together, the barbs 50 on the first clamping plate 11 are firmly installed Set on the first inter-atrial septum 20 to prevent the first clamping disc 11 from falling off the first inter-atrial septum 20; similarly, the barbs 50 on the side of the connecting piece 12 facing the first clamping disc 11 are firmly installed on the On the first interatrial septum 20 , the connector 12 can be prevented from falling off from the first interatrial septum 20 . In addition, the first interatrial septum 20 can also be prevented from being detached from both the first clamping plate 11 and the connecting member 12 to the outside.

Referring to FIG. 2 , in one embodiment, barbs 50 are provided on the side of the connecting piece 12 facing the second clamping disc 13 , and the barbs 50 on the side of the connecting piece 12 facing the second clamping disc 13 are provided. The end of the connecting piece 12 which is connected with the second clamping plate 13 is obliquely arranged. Barbs 50 are provided on the side of the second clamping plate 13 facing the first clamping plate 11 , and the barbs 50 on the second clamping plate 13 face the end of the second clamping plate 13 that is connected to the connecting member 12 . Tilt setting. In this way, after the occluder body 10 is installed in the foramen ovale tunnel 40 and the first atrial septum 20 and the second atrial septum 30 are closely combined together, the barbs 50 on the second clamping disc 13 are firmly installed Set on the second inter-atrial septum 30 to prevent the second clamping disc 13 from falling off the second inter-atrial septum 30; similarly, the barbs 50 on the side of the connecting piece 12 facing the second clamping disc 13 are firmly installed on the second inter-atrial septum 30. On the second atrial septum 30 , the connecting piece 12 can be prevented from falling off from the second atrial septum 30 . In addition, the second interatrial septum 30 can also be prevented from being detached from both the second clamping plate 13 and the connecting member 12 to the outside.

In one embodiment, the tissue defect closure device further includes a delivery device (not shown in the figure) and a push assembly (not shown in the figure). The occluder body 10 is connected with the push assembly and is arranged inside the delivery device. Specifically, the delivery device is a sheath, and a blood vessel is pierced through the sheath to establish a surgical channel, and the pusher assembly and the occluder body 10 are delivered to the vicinity of the foramen ovale. The push assembly is, for example, a steel cable. The occluder body 10 is also provided with a threaded connection portion connected to the second clamping disc 13. The steel cable is provided with a threaded hole adapted to the threaded connection portion. The connection part is unlocked, and the first clamping disc 11, the connecting piece 12 and the second clamping disc 13 of the occluder body 10 are gradually released to the outside of the sheath tube. Since the occluder body 10 is a memory material, when the first clamp When the tightening plate 11 and the connecting piece 12 and the second tightening plate 13 and the connecting piece 12 are separated from each other, the connecting part between the first tightening plate 11 and the connecting piece 12, and the second tightening plate 13 and the connecting piece 12 The connection between them generates a torque to restore the original shape.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features It is considered to be the range described in this specification.

The above examples only represent several embodiments of the present invention, and the descriptions thereof are more specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated A device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connected, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction between the two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Claims (13)

1. A tissue defect occluder, characterized in that the tissue defect occluder comprises an occluder body, and the occluder body is a memory material; The occluder body includes a first clamping disc, a connecting piece and a second clamping disc, the first clamping disc is connected with the second clamping disc through the connecting piece; when the occluder is When the body is in a stretched state, the first clamping disc and the second clamping disc are attached to each other and are on the same plane, or a gap is provided between the first clamping disc and the second clamping disc; A first hollow opening is formed on the disk surface of the first clamping disk, and a second hollow opening is formed on the disk surface of the second clamping disk. 2 . The tissue defect occluder according to claim 1 , wherein the outline of the first clamping disc is in the shape of a star, a petal, a triangle or a polygon; the outline of the second clamping disc is in the shape of a star. 3 . shape, petal, triangle or polygon. 3 . The tissue defect occluder according to claim 1 , wherein the first clamping disc is wound around a first memory wire to form its outline, and the connecting piece is a second memory wire, so the The outline of the second clamping plate is formed by winding the third memory wire; the first memory wire, the second memory wire and the third memory wire are connected in sequence. 4 . The tissue defect occluder according to claim 3 , wherein the first memory wire, the second memory wire and the third memory wire are connected to form an integrated structure; the The first memory wire, the second memory wire and the third memory wire are of the same kind. 5 . The tissue defect occluder according to claim 1 , wherein the first clamping plate, the connecting member and the second clamping plate are combined to form an integrated structure. 6 . 6 . The tissue defect occluder according to claim 1 , wherein when the occluder body is in an incompletely stretched state, the connecting member is respectively connected to the first clamping disc, the The second clamping discs are all arranged at an included angle. 7. The tissue defect occluder according to claim 1, wherein the gap is defined as d, and d is set to be less than 1 mm. 8 . The tissue defect occluder according to claim 1 , wherein when the occluder body is in a fully stretched state, the first clamping disc and the second clamping disc are pulled. 9 . Stretch into a slender shape. 9 . The tissue defect occluder according to claim 1 , wherein the occluder body is a memory alloy or a memory metal. 10 . 10 . The tissue defect occluder according to claim 1 , wherein the occluder body is provided with barbs. 11 . 11 . The tissue defect occluder according to claim 10 , wherein at least two of the barbs are arranged at intervals on the first clamping disc; and at least two barbs are arranged at intervals on the connecting piece. 12 . the barbs; at least two of the barbs are arranged at intervals on the second clamping disc. 12. The tissue defect occluder according to claim 11, wherein the barb is provided on the side of the first clamping disc facing the second clamping disc, and the first clamping disc is provided with the barb. The barbs on a clamping plate are inclined toward the end of the first clamping plate connected with the connecting piece; The barb is provided on the side of the connecting piece facing the first clamping plate, and the barb on the side of the connecting piece facing the first clamping plate faces the connecting piece one end connected with the first clamping plate is inclined; The barb is provided on the side of the connecting piece facing the second clamping disc, and the barb on the side of the connecting piece facing the second clamping disc faces the connecting piece one end connected with the second clamping plate is inclined; The barb is provided on the side of the second clamping disc facing the first clamping disc, and the barb on the second clamping disc faces the second clamping disc and the barb. The connecting ends of the connecting pieces are arranged obliquely. 13. A tissue defect occluding device, wherein the tissue defect occluding device comprises the tissue defect occluding device according to any one of claims 1 to 12; the tissue defect occluding device further comprises a delivery The device is connected with a pushing assembly, and the occluder body is connected with the pushing assembly and is arranged inside the conveying device.

Images