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 plugging device and tissue defect plugging device

Technical Field

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

Background

The foramen ovale is a physiological pathway in the embryonic stage of the atrial septum of the heart. 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 to the left atrium. After birth, with the establishment of pulmonary circulation, the pressure in the left atrium increases, and the secondary septum and the primary septum approach each other and are cohered and fused to gradually form a permanent atrial septum. However, if some people still do not fuse, patent foramen ovale (PFO for short) is formed. In most cases, the pressure in the left atrium of the human heart is greater than in the right atrium, the PFO being in a closed state. In certain circumstances, the PFO tunnel may be pushed open so that the left and right atria form a passageway in front of each other. Emboli from the venous system, which may enter the systemic circulation through PFO channels, appear as strokes or Transient Ischemic Attacks (TIA) if the cerebral arterial system becomes embolized.

Patent foramen ovale is common, and a PFO (Perfluorooctane phosphate) occluder is implanted through a catheter intervention occlusion method. PFO occluders typically include two disc surfaces (defined as the left and right disc surfaces, respectively) and a thin waist connecting the two disc surfaces. Occluders are typically made from superelastic metallic materials such as: nickel titanium alloy. Can be compressed into an elongated strip form for delivery from outside the body to the interatrial site along a vascular pathway through a delivery catheter. After delivery to the desired location, the PFO stopper is released from the delivery catheter, restoring its original two-disc-waist configuration. The two disc surfaces are respectively attached to the left atrium side and the right atrium side, and the waist part is arranged in the PFO channel. Thereby leading the secondary septum and the primary septum to be close to and fused with each other. After the device is implanted, endothelium gradually grows, and finally the whole PFO occluder is wrapped to form complete occlusion.

In the traditional technology, two circular or other regular-shaped clamping discs of the PFO occluder are used for plugging holes at two ends of a foramen ovale so as to play a role in closing the foramen ovale and blocking blood flow. However, the foramen ovale is a flat and long tunnel formed by two unconnected interatrial compartments in a staggered and clamped manner, so when the traditional PFO occluder is used for closing the foramen ovale, the operation is very complicated; secondly, the double discs cannot be completely released after molding, and the flow cannot be completely choked, so that the plugging of the product is ineffective; thirdly, complications such as thrombosis are often likely to occur due to the relatively high metal implant.

SUMMERY OF THE UTILITY MODEL

The utility model provides a defective plugging device of tissue and defective plugging device of tissue to solve one or more technical problem among the prior art.

The technical scheme is as follows: a tissue defect occluder comprises an occluder body which is made of memory material;

the occluder body comprises a first clamping disc, a connecting piece and a second clamping disc, wherein the first clamping disc is connected with the second clamping disc through the connecting piece; when the occluder body is in an unfolded state, the first clamping disc and the second clamping disc are mutually attached and are positioned on the same plane, or a gap is formed between the first clamping disc and the second clamping disc;

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.

In one of the embodiments, the profile of the first clamping disk is star-shaped, petaloid, triangular or polygonal; the outline of the second clamping disc is in a star shape, a petal shape, a triangle shape or a polygon shape.

In one embodiment, the first clamping disc is wound by a first memory wire to form the outline of the first clamping disc, the connector is a second memory wire, and the second clamping disc is wound by a third memory wire to form the outline of the second clamping disc; 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 and the third memory wire are the same.

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

In one embodiment, when the occluder body is in an incomplete stretching state, the connecting piece and the first clamping disc and the second clamping disc are arranged at included angles respectively.

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

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

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

In one embodiment, barbs are arranged on the occluder body.

In one embodiment, at least two barbs are arranged on the first clamping disk at intervals; at least two barbs are arranged on the connecting piece at intervals; at least two barbs are arranged on the second clamping disc at intervals.

In one embodiment, the side surface of the first clamping disc facing the second clamping disc is provided with the barb, and the barb on the first clamping disc is obliquely arranged towards the end of the first clamping disc connected with the connecting piece;

the barb is arranged on the side surface, facing the first clamping disc, of the connecting piece, and the barb, facing the side surface of the first clamping disc, of the connecting piece is obliquely arranged towards one end, connected with the first clamping disc, of the connecting piece;

the barb is arranged on the side surface, facing the second clamping disc, of the connecting piece, and the barb on the side surface, facing the second clamping disc, of the connecting piece is obliquely arranged towards one end, connected with the second clamping disc, of the connecting piece;

the second presss from both sides tight dish the last towards be equipped with on the side that the first tight dish of clamp is equipped with the barb, just the second presss from both sides tight dish the barb orientation the second press from both sides tight dish with the one end slope that the connecting piece links to each other sets up.

A tissue defect occluding device, said tissue defect occluding device comprising said tissue defect occluder; the tissue defect plugging device further comprises a conveying device and a pushing assembly, and the plugging device body is connected with the pushing assembly and arranged inside the conveying device.

When the oval hole is closed, the occluder body is compressed and placed in the conveying device, the occluder body is conveyed into the right atrium through a blood vessel, the conveying device penetrates through the oval hole tunnel, and the conveying device releases the first clamping disc so that the first clamping disc is attached to the outer side of the first atrial septum of the left atrium; withdrawing the conveying device from the foramen ovale tunnel, keeping the first clamping disc of the occluder body still, and further releasing the connecting piece and placing the connecting piece in the foramen ovale tunnel; the delivery device is further withdrawn and the second clamping disk is released, causing the second clamping disk to abut against the outside of the septum secundum of the right atrium. Because the occluder body is made of memory materials, when the first clamping disc and the connecting piece are separated from each other, the connecting part between the first clamping disc and the connecting piece and the connecting part between the second clamping disc and the connecting piece generate torque for restoring the original shape. So, first press from both sides tight dish and second press from both sides tight dish through the moment of torsion production between with the connecting piece trend that is close to each other, and then make first room interval and second room interval between them close to each other and paste tightly, finally reach the purpose of closed oval hole, the shutoff effect is better, and the operation is comparatively simple simultaneously. In addition, as 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, less metal materials are implanted into a body, the metal implants in the body are reduced, the rejection reaction probability of thrombus generation and the like is reduced, and serious consequences such as stroke and the like caused by thrombus are avoided; secondly, metal ions, particularly nickel ions, released by the occluder are reduced, and the probability of canceration of cells is prevented from being increased; meanwhile, the volume of the tissue defect occluder is reduced, the volume of the conveying sheath is further reduced, the smoothness of the conveying sheath entering a human body is improved, and the harm of operation on the human body is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

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

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

fig. 3 is a schematic structural view of a tissue occluding device according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a tissue occluding device according to another embodiment of the present invention;

fig. 5 is a schematic structural view of a first clamping disk of the tissue occluding device according to an embodiment of the invention;

fig. 6 is a schematic structural view of a first clamping disk of a tissue occluding device according to another embodiment of the invention;

fig. 7 is a schematic structural view of a first clamping disk of a tissue occluding device according to another embodiment of the invention;

fig. 8 is a schematic view of a first clamping disk of a tissue occluding device according to another embodiment of the present invention;

fig. 9 is a schematic view of a first clamping disk of a tissue occluding device according to another embodiment of the present invention;

fig. 10 is a schematic structural view of a first clamping disk of a tissue occluding device according to another embodiment of the invention.

10. A stopper body; 11. a first clamping disk; 111. a first hollow-out opening; 112. a first notch; 12. a connecting member; 13. a second clamping disk; 131. a second hollowed-out opening; 132. a second notch; 20. a septum primum; 30. a second atrial septum; 40. a tunnel; 50. and barbs.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention 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. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In order to achieve a right flow blocking effect, a traditional PFO occluder usually uses metal wires, especially nickel titanium wires, to perform dense weaving to form an occluding disc so as to protect and fix a flow blocking membrane in the occluding disc. Therefore, a large number of metal implants are inevitably generated in the body, so that rejection reaction probability such as thrombus generation is greatly increased, and serious consequences such as stroke are further caused; meanwhile, the metal implant can release a large amount of metal ions, particularly nickel-titanium alloy, and the released free nickel ions can obviously increase the canceration probability of cells.

Based on this, referring to fig. 1, fig. 3 or fig. 4, fig. 1 shows a structural schematic diagram of an operating state of the tissue defect occluder according to an embodiment of the present invention, fig. 3 shows a structural schematic diagram of the tissue occluder according to an embodiment of the present invention, and fig. 4 shows a structural schematic diagram of the tissue occluder according to another embodiment of the present invention. The occluder body 10 shown in fig. 3 and 4 is in a state of incomplete extension, differing in the shape of the first clamping disk 11 and the second clamping disk 13. The utility model relates to a pair of defective plugging device of tissue, defective plugging device of tissue include the defective plugging device of tissue, and it is applicable to that the patent foramen ovale is sewed up, the blood vessel is sewed up, the atrial septal defect is sewed up, the ventricular septal defect is sewed up etc. and the defective plugging device of tissue includes plugging device body 10. The occluder body 10 is made of memory material. The stopper body 10 comprises a first clamping disc 11, a connecting piece 12 and a second clamping disc 13. The first clamping disk 11 is connected to the second clamping disk 13 by means of a connecting piece 12. When the occluder body 10 is in an extended state, the first clamping disk 11 and the second clamping disk 13 are mutually attached and positioned on the same plane, or a gap is formed between the first clamping disk 11 and the second clamping disk 13. A first hollowed-out opening 111 is formed on the disk surface of the first clamping disk 11, and a second hollowed-out opening 131 is formed on the disk surface of the second clamping disk 13.

When the above-mentioned tissue defect occluder is used for closing a foramen ovale, for example, the occluder body 10 is compressed and placed in a delivery device, the occluder body 10 is sent into the right atrium through a blood vessel, the delivery device is made to pass through a tunnel 40 of the foramen ovale, the delivery device releases the first clamping disk 11, and the first clamping disk 11 is made to stick to the outer side of the first atrial septum 20 of the left atrium; withdrawing the delivery device from the foramen ovale tunnel 40 while the first clamping disc 11 of the occluder body 10 remains stationary, thereby releasing the connecting member 12 and placing it in the foramen ovale tunnel 40; the delivery device is further withdrawn releasing the second clamping disc 13 such that the second clamping disc 13 is positioned against the outside of the septum secundum 30 of the right atrium. Wherein, because the occluder body 10 is made of memory material, when the first clamping disk 11 and the connecting piece 12, and the second clamping disk 13 and the connecting piece 12 are separated from each other, the connecting part between the first clamping disk 11 and the connecting piece 12, and the connecting part between the second clamping disk 13 and the connecting piece 12 generate torque for restoring the original shape. Therefore, the first clamping disc 11 and the second clamping disc 13 are close to each other through the torque between the first clamping disc and the connecting piece 12, the first chamber interval 20 and the second chamber interval 30 between the first clamping disc and the second clamping disc are close to each other and are attached tightly, the aim of sealing the foramen ovale is finally achieved, the sealing effect is good, and meanwhile, the operation is simple. In addition, as the first hollowed-out opening 111 is formed on the first clamping disc 11 and the second hollowed-out opening 131 is formed on the second clamping disc 13, the amount of metal materials implanted into a body is small, namely, the metal implants in the body are reduced, the rejection reaction probability of thrombus generation and the like is reduced, and serious consequences such as stroke and the like caused by thrombus are avoided; secondly, metal ions, especially nickel ions, released by the occluder are reduced, and the probability of canceration of cells is prevented from increasing; meanwhile, the volume of the tissue defect plugging device is reduced, the volume of the conveying sheath is further reduced, the smoothness of the conveying sheath entering a human body is improved, and the harm of operation to the human body is reduced.

Referring to fig. 3 to 10, in one embodiment, the first clamping disk 11 has a contour including, but not limited to, a star shape (as shown in fig. 5), a petal shape (as shown in fig. 3 and 6), a triangle shape (as shown in fig. 7), or a polygon shape (as shown in fig. 4, 8 to 10). Furthermore, the profile of the second clamping disk 13 is shaped like the first clamping disk 11, including but not limited to a star, a petal, a triangle or a polygon. Therefore, when the outline of the first clamping disk 11 and the outline of the second clamping disk 13 are designed to be regular shapes, the first clamping disk 11 and the second clamping disk 13 can be conveniently machined and molded, and the production efficiency is high.

It should be noted that the contour of the first clamping disk 11 can be flexibly set and arbitrarily adjusted according to the size and shape of the foramen ovale, and can be regular or irregular, as long as it can press the first atrial septum 20 when abutting against the outer sidewall of the first atrial septum 20; similarly, the contour of the second clamping disk 13 can be flexibly set and arbitrarily adjusted according to the size and shape of the oval hole, and can be regular or irregular, so long as the contour can play a role in compressing the second atrial septum 30 when abutting against the outer sidewall of the second atrial septum 30.

It should be noted that the contour shape of the first chuck plate 11 may be the same as or different from the contour shape of the second chuck plate 13, and is not limited herein.

Referring to FIG. 3 or FIG. 4, in one embodiment, the first clamping disk 11 is formed by winding the first memory wire. In addition, the connector 12 is a second memory wire. In addition, the second clamping disk 13 is formed by winding a third memory wire to form the contour thereof. The first memory wire, the second memory wire and the third memory wire are connected in sequence. Therefore, on one hand, in the process of producing and processing the first clamping disc 11, the first clamping disc 11 can be obtained by winding the first memory wire to form the contour, and meanwhile, the area enclosed by the first memory wire is equivalent to the first hollowed-out opening 111, so that the first clamping disc 11 can be produced and obtained relatively quickly; similarly, in the process of manufacturing the second clamping disc 13, the third memory wire is wound to form the contour thereof, and meanwhile, the area enclosed by the third memory wire is equivalent to the second hollowed-out hole 131, so that the second clamping disc 13 can be manufactured more quickly; on the other hand, the first clamping disk 11 and the second clamping disk 13 are made of memory wire materials, so that the number of the memory wire materials is very small, the metal materials implanted into a body is small, complications of thrombosis can be avoided, and adverse reactions are not easy to cause. In addition, the first clamping disk 11 formed by the first memory wire and the second clamping disk 13 formed by the third memory wire can provide enough pressing force to close the first room partition 20 and the second room partition 30 together under the connection of the connecting member 12. In addition, in the process of transporting the occluder body 10 to the operation position, the occluder body 10 can be conveniently stretched into a slender strip shape and placed in a sheath tube with smaller size specification.

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, circular, oval, triangular, polygonal and the like, and can be set according to actual requirements. In addition, the first memory wire, the second memory wire and the third memory wire can all adopt memory alloy or memory metal and the like.

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. Therefore, the same memory wire is adopted to respectively process and form the first clamping disc 11, the connecting piece 12 and the second clamping disc 13, the processing and forming speed is high, the production efficiency is high, the used material is less, and the damage to the body is extremely small. Of course, the first memory wire, the second memory wire and the third memory wire can be made of different materials according to actual requirements, and the specifically selected materials can be flexibly selected without limitation.

Further, referring to fig. 3 to 10, the profiles of the first clamping disk 11 and the second clamping disk 13 are both non-closed structures, in other words, the first notch 112 is disposed on the profile of the first clamping disk 11, and the second notch 132 is disposed on the profile of the second clamping disk 13. I.e. the first clamping disk 11 is straight, and the second clamping disk 13 is likewise straight. One end of a straight line formed by straightening the first clamping disc 11 is a free end, the other end of the straight line is connected with one end of a connecting piece 12, the other end of the connecting piece 12 is connected with one end of a straight line formed by straightening the second clamping disc 13, and the other end of the straight line formed by straightening the second clamping disc 13 is a free end. Therefore, the first clamping disc 11, the connecting piece 12 and the second clamping disc 13 which are sequentially connected can be synchronously processed and formed by adopting the same memory wire material, the processing and forming speed is high, the production efficiency is high, the material consumption is low, and the damage to the body is extremely small.

As an example, the second memory wire is specifically, for example, a linear wire, an S-shaped wire, an L-shaped wire, a W-shaped wire, a Z-shaped wire, etc., and the specific shape thereof is not limited herein as long as it can be placed in the tunnel 40 formed by the septum primum 20 and the septum secundum 30. As a specific example, the second memory wire adopts a linear wire body, so that the second memory wire can be conveniently placed in the tunnel 40 with a smaller size, and meanwhile, the length of the wire body is shorter, so that the metal material can be reduced as much as possible, and therefore, the complication of thrombosis can be avoided, namely, adverse reaction is not easily caused.

Of course, as an alternative, the first memory wire, the second memory wire and the third memory wire may be processed independently, and then combined to form an integrated structure by, for example, fusion bonding.

It should be noted that the first clamping plate 11 is not limited to be formed by using a memory wire material, and may also be, for example, a memory sheet, and a first hollow 111 is processed on the memory sheet; similarly, the second clamping plate 13 is not limited to be formed by a memory wire, and may also be a memory sheet, for example, and the second hollowed-out portion 131 is machined on the memory sheet.

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. Therefore, in the production process, the first clamping disc 11, the connecting piece 12 and the second clamping disc 13 are integrally machined and formed, and the production efficiency is high.

Referring to fig. 1 again, in one embodiment, when the occluder body 10 is in an incomplete extension state, the connecting member 12 is disposed at an angle to both the first clamping disk 11 and the second clamping disk 13. Thus, the angle formed by the first clamping disk 11 and the connecting member 12 can provide elastic pressing force to enable the first clamping disk 11 to clamp the first room interval 20, and the angle formed by the second clamping disk 13 and the connecting member 12 can provide elastic pressing force to enable the second clamping disk 13 to clamp the second room interval 30.

The incompletely stretched state means a state in which the occluder body 10 is stretched only to a certain extent and is not stretched to the limit position; when the occluder body 10 is stretched to the extreme position, i.e. the occluder body 10 is in the fully stretched state, the occluder body 10 will be stretched into an elongated shape.

As an example, the first clamping disk 11 is parallel to the second clamping disk 13 when the occluder body 10 is in an incompletely stretched state. In this way, the first clamping disk 11 and the second clamping disk 13 can move toward each other, and the first clamping disk 11 is parallel to the second clamping disk 13, so as to better clamp the first room partition 20 and the second room partition 30.

In one embodiment, the gap is defined as d (not shown), which is set to less than 1 mm. So, first tight dish 11 of clamp and the clearance d of second tight dish 13 of clamp are enough little, can make first room interval 20 and second room interval 30 be close to each other and paste closely, finally reach the purpose of sealed oval hole, and the shutoff effect is better.

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

In one embodiment, the occluding device body 10 is a memory alloy or memory metal. Therefore, the memory alloy or the memory metal is adopted, so that the damage to human tissues is small, and the memory alloy or the memory metal is durable, long in service life and low in cost. The memory alloy includes, but is not limited to, a titanium-nickel alloy, an aluminum alloy, a titanium alloy, and a nickel alloy, and may be selected according to actual requirements.

Referring to fig. 2, in one embodiment, barbs 50 are provided on the occluding device body 10. Thus, after the occluder body 10 is implanted in place, the barbs 50 are fixed on the atrial septum, so that the occluder body 10 can be stably mounted on the first atrial septum 20 and the second atrial septum 30 without easily separating from the first atrial septum 20 and the second atrial septum 30.

Referring to fig. 2, in one embodiment, the first clamping disk 11 has at least two barbs 50 spaced apart from each other. At least two barbs 50 are spaced apart on the connector 12. At least two barbs 50 are arranged at intervals on the second clamping disk 13. Thus, after the occluder body 10 is implanted in place, the barbs 50 are fixed on the atrial septum, so that the occluder body 10 can be stably mounted on the first atrial septum 20 and the second atrial septum 30 without easily separating 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 disk 11 facing the second clamping disk 13, and the barbs 50 on the first clamping disk 11 are inclined toward the end of the first clamping disk 11 connected to the connecting member 12. The side of the connecting element 12 facing the first clamping disk 11 is provided with barbs 50, and the barbs 50 on the connecting element 12 facing the side of the first clamping disk 11 are arranged obliquely towards the end of the connecting element 12 connected to the first clamping disk 11. Thus, after the occluder body 10 is arranged in the oval hole tunnel 40 to tightly attach and combine the first atrial septum 20 and the second atrial septum 30 together, the barbs 50 on the first clamping disk 11 are stably arranged on the first atrial septum 20 to prevent the first clamping disk 11 from falling off from the first atrial septum 20; similarly, the barbs 50 on the side of the connecting element 12 facing the first clamping disk 11 are firmly attached to the first atrial septum 20 to prevent the connecting element 12 from falling off the first atrial septum 20. In addition, the first compartment divider 20 is prevented from being separated outwardly from the first clamping disk 11 and the connecting member 12.

Referring to fig. 2, in one embodiment, barbs 50 are provided on the side of the connecting member 12 facing the second clamping disk 13, and the barbs 50 on the side of the connecting member 12 facing the second clamping disk 13 are inclined toward the end of the connecting member 12 connected to the second clamping disk 13. The second clamping disk 13 is provided with barbs 50 on its side facing the first clamping disk 11, and the barbs 50 on the second clamping disk 13 are arranged obliquely towards the end of the second clamping disk 13 that is connected to the connecting element 12. Thus, after the occluder body 10 is arranged in the oval hole tunnel 40 to tightly and closely combine the first chamber partition 20 and the second chamber partition 30, the barbs 50 on the second clamping disk 13 are stably arranged on the second chamber partition 30, so that the second clamping disk 13 is prevented from falling off from the second chamber partition 30; similarly, barbs 50 on the side of connecting element 12 facing second clamping disk 13 are securely attached to second compartment 30 to prevent connecting element 12 from falling out of second compartment 30. In addition, it is possible to prevent the second atrial septum 30 from being separated outward from between the second clamping disk 13 and the connecting member 12.

In one embodiment, the tissue defect occlusion device further comprises a delivery device (not shown) and a pusher assembly (not shown). The stopper body 10 is connected with the pushing component and is arranged inside the conveying device. Specifically, the delivery device is a sheath tube, a blood vessel is arranged through the sheath tube to establish a surgical channel, and the pushing assembly and the occluder body 10 are delivered to the vicinity of the foramen ovale. The pushing component is, for example, a steel cable, the plugging device body 10 is further provided with a threaded connection part connected with the second clamping disc 13, the steel cable is provided with a threaded hole matched with the threaded connection part, the threaded connection part is unlocked by rotating the steel cable, the first clamping disc 11, the connecting piece 12 and the second clamping disc 13 of the plugging device body 10 are gradually released to the outside of the sheath, and because the plugging device body 10 is made of 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 connection part between the first clamping disc 11 and the connecting piece 12, and the connection part between the second clamping disc 13 and the connecting piece 12 generate torque for restoring the original shape.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements 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 the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (13)

1. A tissue defect occluder is characterized by comprising an occluder body, wherein the occluder body is made of memory material;

the occluder body comprises a first clamping disc, a connecting piece and a second clamping disc, wherein the first clamping disc is connected with the second clamping disc through the connecting piece; when the occluder body is in an unfolded state, the first clamping disc and the second clamping disc are mutually attached and are positioned on the same plane, or a gap is formed between the first clamping disc and the second clamping disc;

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.

2. The tissue defect occluder of claim 1, wherein said first clamping disk is star-shaped, petal-shaped, triangular or polygonal in profile; the outline of the second clamping disc is in a star shape, a petal shape, a triangle shape or a polygon shape.

3. The tissue defect occluder of claim 1, wherein said first clamping disk is formed by winding a first memory wire into its contour, said connector is a second memory wire, and said second clamping disk is formed by winding a third memory wire into its contour; the first memory wire, the second memory wire and the third memory wire are connected in sequence.

4. The tissue defect occluder of claim 3, wherein said first memory wire, said second memory wire and said third memory wire are connected to form an integral structure; the first memory wire, the second memory wire and the third memory wire are the same.

5. The tissue defect occluder of claim 1, wherein the first clamping disk, the connector and the second clamping disk are combined to form a unitary structure.

6. The tissue defect occluder of claim 1, wherein said connecting members are angled with respect to said first clamping disk and said second clamping disk when said occluder body is in an incompletely stretched state.

7. The tissue defect occluder of claim 1, wherein said gap is defined as d, which is set to less than 1 mm.

8. The tissue defect occluder of claim 1, wherein said first clamping disk and said second clamping disk are stretched into an elongated strip shape when said occluder body is in a fully stretched state.

9. The tissue defect occluder of claim 1, wherein said occluder body is a memory alloy or a memory metal.

10. The tissue defect occluder of claim 1, wherein barbs are provided on said occluder body.

11. The tissue defect occluder of claim 10, wherein at least two of said barbs are spaced apart on said first clamping disk; at least two barbs are arranged on the connecting piece at intervals; at least two barbs are arranged on the second clamping disc at intervals.

12. The tissue defect occluder of claim 11, wherein said barbs on said first clamping disk are disposed on the side of said first clamping disk facing said second clamping disk, and wherein said barbs on said first clamping disk are disposed obliquely toward the end of said first clamping disk connected to said connecting member;

the barb is arranged on the side surface, facing the first clamping disc, of the connecting piece, and the barb, facing the side surface of the first clamping disc, of the connecting piece is obliquely arranged towards one end, connected with the first clamping disc, of the connecting piece;

the side surface of the connecting piece facing the second clamping disc is provided with the barb, and the barb on the connecting piece facing the side surface of the second clamping disc is obliquely arranged towards one end of the connecting piece connected with the second clamping disc;

the second presss from both sides tight dish the last towards be equipped with on the side that the first tight dish of clamp is equipped with the barb, just the second presss from both sides tight dish the barb orientation the second press from both sides tight dish with the one end slope that the connecting piece links to each other sets up.

13. A tissue defect closure device, characterized in that it comprises a tissue defect closure device according to any one of claims 1 to 12; the tissue defect plugging device further comprises a conveying device and a pushing assembly, and the plugging device body is connected with the pushing assembly and arranged inside the conveying device.

Images