CN210990532U - Left auricle plugging device - Google Patents

Abstract

The utility model provides a left auricle plugging device, including the cover plate, coupling mechanism and packing post, coupling mechanism includes the near-end connecting piece fixed mutually with the cover plate, with pack the fixed distal end connecting piece of post mutually, link firmly the intermediate junction piece between near-end connecting piece and distal end connecting piece, and be located the elastic element of intermediate junction piece, the intermediate junction piece has at least two sections linkage segments along the axial joint, and form the annular adjustment tank in two adjacent linkage segments joint departments, the annular adjustment tank makes to have between two adjacent linkage segments and forms the axial clearance between two adjacent linkage segments along the axial, and form the circumference clearance between two adjacent linkage segments along circumference. The middle connecting piece has certain flexibility and axial flexibility, so that the angle and the axial distance between the cover plate and the filling column can be adjusted, the left auricle occluder can adapt to left auricle inner cavities with different shapes, the occurrence of residual shunt is reduced, and an ideal occlusion effect is realized.

Description

Left auricle plugging device

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a left atrial appendage occluder.

Background

Atrial fibrillation (atrial fibrillation) is the most common sustained arrhythmia and patients with atrial fibrillation have five times the risk of stroke compared to the average person. In china, stroke is the leading cause of death and also the leading cause of disease burden; stroke caused by atrial fibrillation is generally more severe in clinical manifestation, higher in death rate and easier to relapse.

Non-valvular atrial fibrillation is a high-grade type of atrial fibrillation. Whereas in non-valvular atrial fibrillation more than 90% of the thrombus formation is associated with the left atrial appendage. The left atrial appendage is the remnant of the original left atrium during the embryonic period, and is in a long, narrow and curved tubular shape with a narrow apex and rich pectinate muscles and trabeculae therein. During atrial fibrillation, the entrance of the left auricle is obviously widened, effective regular contraction is lost, and the inward movement of the auricle wall is difficult to cause sufficient emptying of the left auricle, so that blood is deposited on the left auricle to form the pathological basis of thrombus. The morphological characteristics of the left atrial appendage make the blood flow swirl and slow down, and is also a condition for promoting thrombosis.

By plugging the left atrial appendage, the formation of thrombus in the left atrial appendage during atrial fibrillation is prevented, thereby reducing the risk of long-term disability or death caused by thromboembolism in patients with atrial fibrillation. Various technical devices have been developed and used for plugging the left atrial appendage, and the minimally invasive interventional operation of implanting the left atrial appendage plugging device through a catheter has the advantages of small wound, no need of thoracotomy and extracorporeal circulation, short treatment period and quick response.

Generally, the left atrial appendage occluder comprises a cover plate (also called a covering part) arranged at the proximal end and a filling column (also called an anchoring part) arranged at the distal end, wherein a plurality of thorn-shaped elements for anchoring are arranged at the periphery of the filling column, the cover plate and the filling column are woven by elastic metal wires, or the anchoring part can be carved by an elastic metal tube.

Further, in the existing left atrial appendage occluder, the intermediate gathering point for connecting the covering sheet and the plugging column is a rigid element, and although the angle and the axial distance between the covering sheet and the plugging column can be adjusted by the deformation of the woven net, the influence of the preset coaxial state still exists between the covering sheet and the plugging column. In actual clinical application, because individual difference, every patient's left auricle internal structure form is different, when carrying out the shutoff art to the crooked left auricle of structure, the cover plate with pack easily to form the contained angle between the post, the cover plate all fastens at rigid structure's middle rendezvous point with the support holder or the elastic metal silk that packs the post, when the cover plate with pack the post formation contained angle, middle rendezvous point makes the metal mesh deflection of both increase to the tractive between them, reduce the coverage performance of near-end cover plate to the left auricle mouth, thereby make the blood between left atrium and the left auricle can not totally separate, produce remaining reposition of redundant personnel, the shutoff effect of direct influence left auricle.

Further, for the left auricle with a large implantation depth, the length between the cover plate and the filling column is not enough, and the cover plate can not cover the mouth of the left auricle due to the fact that part of the cover plate is pulled into the auricle, so that the plugging effect is influenced.

Furthermore, the left atrial appendage wall is a relatively fragile human body structure, the thorn-shaped element can damage the left atrial appendage wall due to various reasons, once the left atrial appendage wall is punctured, serious complications such as pericardial tamponade, pericardial effusion and delayed pericardial effusion can be formed, the safety and effectiveness of the left atrial appendage occluder are reduced, and the life safety of a patient is threatened.

Disclosure of Invention

In view of the above shortcomings of the prior art, an object of the present invention is to provide a left atrial appendage occluder, which has adjustability of the angle and the axial distance between the cover plate and the plugging post, can ensure the covering performance of the cover plate, and can also reduce the serious complications of left atrial appendage occlusion.

In order to achieve the purpose, the utility model provides a left atrial appendage occluder, include along the axial consecutive cover plate, coupling mechanism and pack the post, coupling mechanism includes the near-end connecting piece of fixing mutually with the cover plate, with pack the post fixed distal end connecting piece mutually, link firmly the intermediate junction piece between near-end connecting piece and distal end connecting piece, and be located the elastic element of intermediate junction piece, the both ends of elastic element are fixed in near-end connecting piece and distal end connecting piece respectively, and are in the non-compression state, the intermediate junction piece has at least two sections along the linkage segment of axial joint, and form the annular adjustment tank at two sections adjacent linkage segment joint department, the annular adjustment tank makes have between two sections adjacent linkage segments along the axial between two sections adjacent linkage segments axial clearance, and along the circumference clearance that the circumference formed between two sections adjacent linkage segments, axial clearance is 0.1 ~ 0.3mm, axial clearance and circumference clearance make cover plate and pack the contained angle α between the post 0~20 axial clearance and pack the circumference clearance make the axial clearance and pack the flexible volume of 0.9 ~ 0.3mm of axial distance between the post.

Further, when the length of the intermediate link is minimized, the elastic member is in a free state.

Further, the annular adjusting groove is formed by engraving the intermediate connecting piece.

Further, in two adjacent linkage segments, one section linkage segment is equipped with the joint lug that several circumference distributes in annular adjustment tank department, and another section linkage segment is equipped with several circumference and distributes in annular adjustment tank department and with the joint groove of several joint lug one-to-one adaptation, axial gap and circumference clearance form between the cell wall of joint lug and joint groove.

Further, the clamping protruding part and the clamping groove are in a T shape, or a partial circle shape, or a partial oval shape.

Further, a first blood flow blocking film and a barb are circumferentially arranged on the outer peripheral side of the packing column, the barb is provided with a root part connected with the packing column, and the first blood flow blocking film is arranged on the root part of the barb.

Further, the first blood flow blocking film is a polyester fiber film, and the polyester fiber film covers the thorn root parts of the barbs in a hot melting or hot spraying mode.

Further, the first blood flow barrier membrane is a medical suture attached to the barbed root portion of the barb in a tightly intertwined manner.

Further, the barb is kept away from the one end of packing the post for the free end, the barb is provided with thorn bellying between free end and thorn root portion.

Furthermore, barbs are circumferentially arranged on the outer peripheral side of the filling column, and a circle of second blood flow blocking film fixed on the inner peripheral surface of the filling column and a circle of third blood flow blocking film fixed on the outer peripheral surface of the filling column are arranged at the barbs of the filling column.

As mentioned above, the utility model relates to a left atrial appendage occluder has following beneficial effect:

the utility model relates to an among the left auricle occluder, adjacent two sections linkage segments can be crooked relatively and flexible through axial clearance and circumference clearance between the two in the intermediate junction spare, thereby make the intermediate junction spare have certain bendability and axial scalability, finally make the cover plate and fill angle and axial distance between the post and all have the adjustability, and make the cover plate and fill angle between the post and axial distance's adjustability have better controllability, effectively guarantee the coverage performance of cover plate, can make left auricle occluder adaptation form left auricle inner chamber different from this, reduce the emergence of residual reposition of redundant personnel, realize ideal shutoff effect, avoid the patient to appear that postoperative pericardial effusion or pericardium fill, improve the security and the validity of left auricle occluder.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of a left atrial appendage occluder in the present application.

Fig. 2 is a schematic structural view of the connection mechanism in fig. 1.

Figure 3 is a schematic view of an embodiment of a left atrial appendage occluder implanted in a left atrial appendage.

Figure 4 is a schematic structural diagram of a connecting mechanism in a first embodiment of the left atrial appendage occluder.

Fig. 5 is a schematic view of the internal structure of fig. 4.

Fig. 6 and 7 are schematic views of the connection mechanism of fig. 4 in a stretched state.

Fig. 8 and 9 are schematic views of the connection mechanism of fig. 4 in a contracted state.

Figures 10 and 11 are schematic views of an embodiment of the left atrial appendage occluder with structures at the barbs.

Fig. 12 is a schematic structural diagram of a second embodiment of the left atrial appendage occluder of the present application.

Fig. 13 is a schematic structural view of the connection mechanism of fig. 12.

Fig. 14 is a schematic structural diagram of a third embodiment of the left atrial appendage occluder in the present application.

Fig. 15 is a schematic structural view of the connection mechanism of fig. 14.

Fig. 16 is a schematic structural diagram of a fourth embodiment of the left atrial appendage occluder of the present application.

Figure 17 is a schematic structural diagram of the fourth embodiment of the left atrial appendage occluder at the barbs.

Figure 18 is a schematic structural diagram of a fourth barb of the left atrial appendage occluder embodiment.

Figure 19 is a schematic structural view of a fifth embodiment of a left atrial appendage occluder of the present application.

Element number description: 10. a cover sheet; 20. a connecting mechanism; 21. a proximal connector; 22. a distal connector; 23. an intermediate connecting member; 24. an elastic element; 25. a connecting section; 251. clamping the projection; 252. a clamping groove; 26. an annular adjustment groove; 261. an axial clearance; 262. a circumferential gap; 30. filling the column; 31. a barb; 32. pricking a convex part; 40. a first blood flow barrier membrane; 50. a second blood flow barrier membrane; 60. a third blood flow barrier membrane; 70. a near-end rendezvous point; 80. a remote rendezvous point.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered as the scope of the present invention without substantial changes in the technical content.

The application provides a left atrial appendage occluder for an occluder left atrial appendage and a method of manufacturing the left atrial appendage occluder. The left atrial appendage occluder has a proximal end and a distal end, the proximal end is the end of the left atrial appendage occluder near the operator, and the distal end is the end of the left atrial appendage occluder away from the operator. In addition, in the following embodiments, the direction from the proximal end to the distal end of the left atrial appendage occluder is defined as the axial direction. Several preferred embodiments of the left atrial appendage occluder are provided below.

Embodiment one of left atrial appendage occluder

As shown in figures 1 and 2, and 4 and 5, the left atrial appendage occluder provided by the present application comprises a covering plate 10, a connecting mechanism 20 and a plug column 30 which are connected in sequence in a proximal-to-distal direction, wherein the covering plate 10 and the plug column 30 are metal mesh members woven from elastic metal wires, wherein the connecting mechanism 20 comprises a proximal connecting piece 21 fixed to the covering plate 10, a distal connecting piece 22 fixed to the plug column 30, an intermediate connecting piece 23 fixed between the proximal connecting piece 21 and the distal connecting piece 22, and an elastic element 24 located in the intermediate connecting piece 23, wherein the covering plate 21, the intermediate connecting piece 23, the distal connecting piece 22 and the elastic element 24 extend axially in a proximal-to-distal direction, wherein both ends of the elastic element 24 are fixed to the proximal connecting piece 21 and the distal connecting piece 22, respectively, and are always in a non-compressed state, i.e. the elastic element 24 can be in a stretched state or a free state, and wherein the intermediate connecting piece 23 has at least two axially clamped connecting segments 25, and an annular adjusting groove 26 formed at the clamping position between the adjacent segments 25, 261, and the axial gap between the adjacent segments of the plug column 23, 261, preferably 0, 261, 0, 262, 0, 3, 0, 261, 0, 3, 0, 3, 261, 0, 3, 261, 0, 3, 0, 261, 0, 3, 261, 3, 0, 3, and 83, 3, and 83, 3, and 83, 3, respectively, and 83, 3, respectively, and 83, respectively, and 261, respectively, and 83, respectively, and 261, and the axial, respectively, and the axial distance of the axial distance between the adjacent plug column 23, and the axial length of the plug column 23, and the axial distance of the axial distance between the adjacent plug column 23, and the axial connector, and the axial.

Further, in a preset state of the left atrial appendage occluder, the length of the middle connecting piece 23 is shortest; meanwhile, the axial center portion of the metal mesh on the cover sheet 10 facing the distal end thereof approaches the distal end of the cover sheet 10, and the distal end of the cover sheet 10 is fixed to the proximal end connector 21, so that a certain tensile force is formed between the proximal end connector 21 and the cover sheet 10; the axially central portion of the expanded metal on the packing 30 facing its proximal end approaches the distal end of the packing 30, and the proximal end of the packing 30 is fixed to the distal connector 22, so that the shape of the packing 30 is not easily affected by the distal connector 22.

Further, the left atrial appendage occluder is implanted into the human body via a delivery system, released at the left atrial appendage and anchored in the left atrial appendage, and the left atrial appendage occluder is placed in the left atrial appendage, and during release of the left atrial appendage occluder, the distal occluder post 30 is released first, the occluder post 30 is secured in the left atrial appendage, the attachment mechanism 20 is released second, and the proximal occluder post 10 is released last, the attachment mechanism 20 also enables an included angle α between the cover sheet 10 and the occluder post 30 via the circumferential adjustment groove 26 having an axial gap 261 and a circumferential gap 262 during release of the left atrial appendage occluder, as shown in fig. 3, to better accommodate the complex left atrial appendage, if the occluder post 30 is implanted at a slight depth, the attachment mechanism 20 enables a slight stretching via the circumferential adjustment groove 26 having an axial gap 261 and a circumferential gap 262, the elastic element 24 is in a stretched state, and the attachment mechanism 20 is applied with a small tensile force to the proximal connector 21 and distal connector 22, thereby enabling the retention of the axial length of the left atrial appendage occluder post 20 and the left atrial appendage occluder post 30 to be maintained in a stable engagement with each other, thereby enabling the left atrial appendage occlusion with the left atrial appendage 30, and the left atrial appendage occlusion mechanism 20, thereby enabling the left atrial appendage occlusion to be maintained in a stable engagement with the left atrial appendage occlusion mechanism 20, thereby enabling the left atrial appendage 20, and the left atrial appendage occlusion with the left atrial appendage 20, the left atrial appendage occlusion mechanism 20, the left atrial appendage occlusion with the left atrial appendage 20, the left atrial appendage occlusion being maintained in a reduced strain, the left atrial appendage occlusion with the left atrial appendage, the left atrial appendage occlusion being maintained in a reduced strain, and with the left atrial appendage occlusion with the left atrial appendage, and with the left atrial appendage, with.

Preferably, when the left atrial appendage occluder is in a preset state, the length of the intermediate connection 23 is minimal, and the elastic element 24 is in a free state and generates no spring force. Therefore, middle connecting piece 23 under all the other lengths, or, middle connecting piece 23 is stretched, length grow, and elastic element 24 all is in the tensile state, and elastic element 24 produces the pulling force, has the trend of returning back, the utility model discloses the tensile length that sets up is the trace, and elastic element 24 is also less at the pulling force of tensile state, consequently can not make the left atrial appendage occluder be difficult to adapt to the auricle form because of the trend of returning back. In addition, the proximal connector 21 and the distal connector 22 are both a metal member, such as a stainless steel sleeve; the intermediate connector 23 is a length of metal tubing, such as stainless steel tubing. The elastic element 24 may be a spring wound from an elastic wire; in a preset state, the distance between each circle of elastic metal wires in the elastic element 24 is 50% of the outer diameter of the elastic metal wires; the outer diameter of the elastic metal wire in the elastic element 24 is 0.05-0.7 mm, and the outer diameter of the elastic element 24 is 1-1.9 mm, preferably 1.5 mm. The intermediate connector 23 and the elastic element 24 may be made of nitinol, medical stainless steel, or other elastic metal.

Further, the annular regulating groove 26 is laser-engraved by the intermediate link 23.

Furthermore, the clamping structure of the two adjacent connecting sections 25 is preferably that, as shown in fig. 4, in the two adjacent connecting sections 25, a plurality of clamping protrusions 251 are circumferentially distributed at the annular adjusting groove 26 of one connecting section 25, a plurality of clamping grooves 252 are circumferentially distributed at the annular adjusting groove 26 of the other connecting section 25 and are matched with the plurality of clamping protrusions 251 one by one, an axial gap 261 and a circumferential gap 262 are formed between the clamping protrusions 251 and the groove walls of the clamping grooves 252, and the two matching parts enable the two adjacent connecting sections 25 to be relatively axially telescopic and relatively bendable and enable the two adjacent connecting sections 25 to be connected, in addition, when the annular adjusting groove 26 is laser-engraved on the middle connecting piece 23, lines L are engraved, so the annular adjusting groove 26 is formed by connecting a plurality of L grooves end to end, and both the clamping protrusions 251 and the clamping grooves 252 are in a T shape.

Further, as shown in fig. 1, both the cover sheet 10 and the packing pillars 30 are woven of a plurality of elastic metal wires; the near ends of the elastic metal wires of the braided cover plate 10 are restrained and fixed by a near end gathering point 70, and the far ends of the elastic metal wires of the braided cover plate 10 are restrained and fixed by a near end connecting piece 21 of the connecting mechanism 20; the proximal ends of the plurality of elastic wires of the braided packing columns 30 are constrained and fixed by the distal connecting member 22 of the connecting mechanism 20, and the distal ends of the plurality of elastic wires of the braided cover sheet 10 are constrained and fixed by a distal aggregation point 80. In the plurality of elastic metal wires of the braided packing column 30, barbs 31 are formed by locally flattening and carving the plurality of elastic metal wires, so that the plurality of barbs 31 are circumferentially arranged on the outer peripheral side of the packing column 30, as shown in fig. 1. In particular, as shown in fig. 10 or 11, the barb 31 has a barb root connected to the packing column 30 and a free end which is away from the packing column 30 and is not connected to the packing column 30, and a first blood flow blocking membrane 40 is circumferentially arranged on the outer circumferential side of the packing column 30, and the first blood flow blocking membrane 40 is arranged on the barb root of the barb 31, so that the first blood flow blocking membrane 40 is located at the position where the barb 31 is connected to the packing column 30, firstly, the protruding length of the barb 31 is further reduced, and the barb 31 can grip the auricle tissue in a gentler manner, so that the auricle tissue is less damaged, and secondly, when the auricle tissue is slightly damaged, the first blood flow blocking membrane 40 can block the outflow of blood in the left auricle, thereby reducing the occurrence of pericardial-packed delayed pericardial effusion.

Preferably, the first blood flow blocking film 40 is formed at the root of the barb 31 in two ways: firstly, a polyester fiber film is placed at the root part where the barb 31 is connected with the packing column 30, the polyester fiber film is heated to melt, after cooling, a first blood flow blocking film 40 is formed at the root part where the barb 31 is connected with the packing column 30, the first blood flow blocking film 40 is point-shaped, as shown in fig. 10, and the first blood flow blocking film 40 is a polyester fiber film and covers the root part of the barb 31 in a hot melting way. Secondly, polyester fiber filaments are sprayed at the root part where the barb 31 is connected with the filling column 30 in a hot spinning mode, after cooling, a first blood flow blocking film 40 is formed at the root part where the barb 31 is connected with the filling column 30, the first blood flow blocking film 40 is in a sheet shape, as shown in fig. 11, and the first blood flow blocking film 40 is a polyester fiber film and covers the root part of the barb 31 in a hot spinning mode.

Further, the manufacturing method of the left atrial appendage occluder with the structure comprises the following steps:

step S1, processing the metal net for the cover sheet 10 and the packing posts 30: the flap 10 and the packing post 30 are woven using an elastic wire, and the outer circumferential side of the packing post 30 has barbs 31 in an integral structure with the packing post 30 in the circumferential direction.

Step S2, processing the connecting mechanism 20, which sequentially includes the following sub-steps:

step S21, processing a plurality of axially distributed and circumferentially extending annular adjusting grooves 26 on a section of metal pipe, wherein the annular adjusting grooves 26 enable the metal pipe to be provided with a plurality of sections of connecting sections 25; in the two adjacent connecting sections 25, one connecting section 25 is provided with a plurality of clamping protruding parts 251 which are circumferentially distributed at the annular adjusting groove 26, the other connecting section 25 is provided with a plurality of clamping grooves 252 which are circumferentially distributed at the annular adjusting groove 26 and are in one-to-one correspondence with the plurality of clamping protruding parts 251, and the two adjacent connecting sections 25 are clamped through the matching of the clamping protruding parts 251 and the clamping grooves 252; and, have axial clearance 261 and circumference clearance 262 at the joint groove 252 between adjacent both ends linkage segment 25, axial clearance 261 is 0.1 ~ 0.3mm, and circumference clearance 262 is 0.1 ~ 0.3 mm.

And step S22, cutting a metal pipe section with a required length.

Step S23, an elastic element 24 is inserted into the interior of the metal tube segment in a predetermined shape and free state.

Step S24, fixing the two ends of the metal tube segment and the elastic element 24 to a metal element respectively to form the connection mechanism 20, the metal tube segment forms the middle connector 23 of the connection mechanism 20, the metal element fixed at one end of the metal tube segment and the elastic element 24 forms the proximal connector 21 of the connection mechanism 20, the metal element fixed at the other end of the metal tube segment and the elastic element 24 forms the distal connector 22 of the connection mechanism 20, and the length of the elastic element 24 is consistent with the longest length of the middle connector 23.

Step S3, fixing the distal end of the patch 10 to the proximal connector 21 of the connecting mechanism 20, fixing the proximal end of the patch 10 to the proximal gathering point 70, fixing the proximal end of the packing post 30 to the distal connector 22 of the connecting mechanism 20, fixing the distal end of the packing post 30 to the distal gathering point 80, and thermoforming the metal nets of the patch 10 and the packing post 30 into a predetermined shape.

Step S4, attaching the first blood flow blocking film 40 to the root of the barb 31 by hot melting or hot spinning, thereby manufacturing the left atrial appendage occluder.

Second embodiment of the left atrial appendage occluder

The difference between the second embodiment of the left atrial appendage occluder and the first embodiment of the left atrial appendage occluder is that the annular adjustment groove 26 has a different shape, so that the shapes of the clamping protrusion 251 and the clamping groove 252 on the connecting section 25 are different, specifically, in the second embodiment of the left atrial appendage occluder, as shown in fig. 12 and 13, when the annular adjustment groove 26 is laser-engraved on the intermediate connecting member 23, the engraving pattern is a circular pattern, so the annular adjustment groove 26 is formed by connecting a plurality of circular grooves end to end, so that the clamping protrusion 251 and the clamping groove 252 both have a partial circular shape larger than one half, and the circular pattern in the second embodiment of the left atrial appendage occluder has better flexibility than the L-shaped pattern in the first embodiment of the left atrial appendage occluder.

Third embodiment of left atrial appendage occluder

The difference between the third embodiment of the left atrial appendage occluder and the first embodiment of the left atrial appendage occluder is that: the annular adjustment groove 26 is shaped differently, thereby providing the connecting section 25 with a different snap projection 251 and snap groove 252. Specifically, in the third embodiment of the left atrial appendage occluder, as shown in fig. 14 and 15, when the annular adjustment groove 26 is laser-engraved on the intermediate connecting member 23, the engraved lines are elliptical lines, so that the annular adjustment groove 26 is formed by connecting a plurality of elliptical grooves end to end, and thus the clamping protrusion 251 and the clamping groove 252 are both partially elliptical, which is greater than one-half.

Fourth embodiment of the left atrial appendage occluder

The fourth embodiment of the left atrial appendage occluder differs from the first embodiment of the left atrial appendage occluder in that: the first blood flow barrier membrane 40 on the barb 31 is formed in a different manner. Specifically, in the fourth embodiment of the left atrial appendage occluder, as shown in fig. 16 to 18, first, in the processing process of the barbs 31, the barbs 31 are locally thickened, and after heat treatment and shaping, two spine raised parts 32 which are approximately symmetrically distributed are formed at the thickened parts of the barbs 31; then, the medical suture is tightly wound from the root portion of the barb 31 contacting the packing column 30 to the barbed protrusion 32, and the medical suture is attached to the root portion of the barb 31 in a tightly wound manner, whereby the first blood flow blocking film 40 is formed at the root portion of the barb 31, and the first blood flow blocking film 40 cannot slip toward the free end of the barb 31 through the barbed protrusion 32.

Fifth embodiment of the left atrial appendage closure device

The difference between the fifth embodiment of the left atrial appendage occluder and the first embodiment of the left atrial appendage occluder is that: the fifth left atrial appendage occluder embodiment does not provide a first blood flow blocking membrane 40 attached to the barbs 31, but rather provides a second blood flow blocking membrane 50 and a third blood flow blocking membrane 60 on the tamp post 30. Specifically, in the fifth embodiment of the left atrial appendage occluder, as shown in fig. 19, the plug 30 is provided with a ring of the second blood flow blocking membrane 50 fixed on the inner circumferential surface of the plug 30 and a ring of the third blood flow blocking membrane 60 fixed on the outer circumferential surface of the plug 30 at the barbs 31, and both the second blood flow blocking membrane 50 and the third blood flow blocking membrane 60 are annular membranes; moreover, the barb 31 extends out of the third blood flow blocking film 60, so that the anchoring performance of the barb 31 is ensured; when the left atrial appendage occluder is folded to be in a linear state, the barbs 31 can cover the third blood flow blocking membrane 60. The second and third blood flow barriers 50, 60 also allow the barbs 31 to grip the atrial appendage tissue in a more gentle manner, blocking the outflow of blood from the left atrial appendage at the barb 31 location when a minor injury occurs, thereby reducing the occurrence of pericardial tamponade, late-onset pericardial effusion.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A left atrial appendage occluder comprises a cover plate (10), a connecting mechanism (20) and a plugging column (30) which are sequentially connected in the axial direction, and is characterized in that the connecting mechanism (20) comprises a near-end connecting piece (21) fixed with the cover plate (10), a far-end connecting piece (22) fixed with the plugging column (30), a middle connecting piece (23) fixedly connected between the near-end connecting piece (21) and the far-end connecting piece (22), and an elastic element (24) located in the middle connecting piece (23), wherein two ends of the elastic element (24) are respectively fixed to the near-end connecting piece (21) and the far-end connecting piece (22) and are in a non-compressed state, the middle connecting piece (23) is provided with at least two sections of connecting sections (25) clamped in the axial direction, and an annular adjusting groove (26) formed at the clamping position of the two adjacent connecting sections (25), the annular adjusting groove (26) enables an axial gap (261) formed between the two adjacent connecting sections (25) in the axial direction to be 0.261-0.262 mm, and the axial gap (262-0.3-0.0-0-of the circumferential direction of the axial gap (262-0 circumferential direction of the axial gap (262) and the axial gap (262) between the plugging column.

2. The left atrial appendage occluder of claim 1, wherein: when the length of the intermediate connection (23) is minimal, the elastic element (24) is in a free state.

3. The left atrial appendage occluder of claim 1, wherein: the annular adjusting groove (26) is formed by engraving the intermediate connecting piece (23).

4. The left atrial appendage occluder of claim 1, wherein: in two adjacent sections linkage sections (25), one section linkage section (25) is equipped with joint lug boss (251) that several circumference distributes in annular adjustment tank (26) department, and another section linkage section (25) is equipped with several circumference distribution in annular adjustment tank (26) department and with joint groove (252) of several joint lug boss (251) one-to-one adaptation, axial clearance (261) and circumference clearance (262) form between the cell wall of joint lug boss (251) and joint groove (252).

5. The left atrial appendage occluder of claim 4, wherein: the clamping protrusion (251) and the clamping groove (252) are in a T shape, or a partial circle shape, or a partial oval shape.

6. The left atrial appendage occluder of claim 1, wherein: the periphery side circumference of packing post (30) is arranged with first blood flow barrier membrane (40) and barb (31), barb (31) have with packing post (30) continuous thorn root portion, first blood flow barrier membrane (40) are arranged at the thorn root portion of barb (31).

7. The left atrial appendage occluder of claim 6, wherein: the first blood flow blocking film (40) is a polyester fiber film which covers the root parts of the barbs (31) in a hot melting or hot spraying mode.

8. The left atrial appendage occluder of claim 6, wherein: the first blood flow barrier membrane (40) is a medical suture attached to the base of the barb (31) in a tightly intertwined manner.

9. The left atrial appendage occluder of claim 8, wherein: one end of the barb (31) far away from the filling column (30) is a free end, and the barb (31) is provided with a barb convex part (32) between the free end and the barb root part.

10. The left atrial appendage occluder of claim 1, wherein: barbs (31) are circumferentially arranged on the outer peripheral side of the filling column (30), and a circle of second blood flow blocking film (50) fixed on the inner peripheral surface of the filling column (30) and a circle of third blood flow blocking film (60) fixed on the outer peripheral surface of the filling column (30) are arranged at the barbs (31) of the filling column (30).

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