CN111000598B

CN111000598B - Plugging device

Info

Publication number: CN111000598B
Application number: CN201911136428.8A
Authority: CN
Inventors: 邱礼彪
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2021-09-21
Anticipated expiration: 2039-11-19
Also published as: CN111000598A

Abstract

The invention discloses an occluder which comprises a first occluding part and a second occluding part which are arranged at intervals relatively, and further comprises an adjusting structure, wherein the adjusting structure is connected between the first occluding part and the second occluding part and is used for adjusting the relative positions of the two occluding parts. Because the relative position between two plugging pieces can be adjusted to first connecting piece and second connecting piece of this application, can effectively avoid the plugging device to extrude the interatrial septum tissue at the shutoff in-process, guaranteed the safety of patient's heart.

Description

Plugging device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an occluder.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

With the continuous development of interventional material instruments and interventional cardiology, minimally invasive treatment of congenital heart diseases such as Atrial Septal Defect (ASD), Ventricular Septal Defect (VSD), Patent Ductus Arteriosus (PDA) and Patent Foramen Ovale (PFO) through a catheter interventional occluder becomes an important method.

The occluder comprises a left disc, a right disc and a waist connecting piece for connecting the left disc and the right disc, the waist connecting piece, the left disc and the right disc of the existing occluder are all in rigid connection, and the existing occluder has limited inclination angle and cannot achieve good occlusion effect for defects with large thickness difference on two sides. For example, in clinic, due to individual differences of patients, the patent foramen ovale has diversity, and due to the problems of different tunnel lengths of the patent foramen ovale, multi-angle inclination and the like, the atrial septal tissue is basically extruded by an occluder to ensure the occlusion effect, which causes harm to the heart of the patient.

Disclosure of Invention

The object of the present invention is to at least solve the problem of the risk of the occluding device to the heart of a patient. The purpose is realized by the following technical scheme:

the invention provides an occluder, which comprises a first occluding part and a second occluding part which are arranged at an interval relatively, and further comprises an adjusting structure, wherein the adjusting structure is connected between the first occluding part and the second occluding part and is used for adjusting the relative positions of the two occluding parts;

the adjusting structure comprises a first connecting piece and a second connecting piece, a horn-shaped accommodating cavity and a channel communicated with the accommodating cavity and extending to the end part of the first connecting piece are arranged in the first connecting piece, and at least two limiting parts axially arranged at intervals are convexly arranged on the inner wall of the accommodating cavity; the mobilizable connection of one end of second connecting piece is in the passageway, the second connecting piece is including being located hold the elastic support portion of intracavity, and set up on the elastic support portion with hold the portion of holding of the inner wall looks butt in chamber, the elastic support portion is the loudspeaker form, elastic support portion atress elastic deformation can remove spacing portion is right the spacing of portion is held to the card.

In the occluder of the present invention, the inner wall of the channel is provided with a pressing portion in a protruding manner.

In the occlusion device of the invention, the inner diameter of the accommodating cavity is gradually reduced along the direction from the first connecting piece to the second connecting piece.

In the occluder of the present invention, the second connecting member includes a main body portion, the elastic support portion includes a plurality of support rods distributed along a circumferential direction, one end of each support rod is connected to the main body portion, and the other end of each support rod extends in an axial direction away from the occluder.

In the stopper according to the present invention, the other end of the main body portion is rotatably connected to the second stopper.

In the occlusion device of the present invention, the adjusting structure further includes a third connecting member, the third connecting member is fixedly connected to the second occlusion member, the third connecting member is provided with a connecting hole, and the other end of the main body portion is rotatably connected to the connecting hole.

In the occluder of the present invention, the connection hole includes a tapered section, a connection section, and an accommodation section, which are sequentially connected, and the second connection member further includes a rotation portion provided on the main body portion, the rotation portion being located in the accommodation section.

In the occluder of the present invention, the main body portion is provided with a notch structure for bending the main body portion.

In the occluder of the present invention, the slit structure includes at least two slits provided at intervals in the axial direction of the body portion, the slits having a dovetail shape; alternatively, the slot structure comprises a slot spirally distributed on the main body part.

In the occluder of the present invention, the occluder further comprises a connecting member, a first connecting tube, a second connecting tube and a third connecting tube, wherein the first connecting tube and the second connecting tube are respectively disposed at two sides of the first occluding part, the third connecting tube is disposed at one side of the second occluding part, two ends of the adjusting structure are respectively fixedly connected to the second connecting tube and the third connecting tube, and the connecting member is fixedly connected to the first connecting tube.

In summary, the occluder of the present invention has the following advantages:

the plugging device comprises a first connecting piece and a second connecting piece which are located between a first plugging piece and a second plugging piece and are connected in a movable mode, relative positions between the two plugging pieces can be adjusted by the first connecting piece and the second connecting piece, the plugging device is effectively prevented from extruding atrial septal tissue in the plugging process, and the safety of the heart of a patient is guaranteed.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

figure 1 schematically shows a cross-sectional structural view (section lines not shown) of a first embodiment of an occluding device according to the present invention;

figure 2 is a schematic diagram of the occluding device shown in figure 1 in an implementation;

figure 3 is a schematic view of the occluding device shown in figure 1 in an exploded configuration;

FIG. 4 is a cross-sectional structural view of the first connector shown in FIG. 3;

FIG. 5 is a structural cross-sectional view of the second connector shown in FIG. 3;

FIG. 6 is a structural cross-sectional view of a sixth link shown in FIG. 3;

figure 7 is a cross-sectional structural view (section lines not shown) of a second embodiment of the occluding device shown in figure 1;

figure 8 is a cross-sectional structural view of the first embodiment of the second connector in the occluding device shown in figure 7;

figure 9 is a cross-sectional structural view of a second embodiment of a second connector in the occluding device shown in figure 7;

FIG. 10 is a slot configuration of the second connector shown in FIG. 8;

figure 11 is a cross-sectional structural view of a third embodiment of a second connector in the occluding device shown in figure 7 (only the cuts are shown).

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

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," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

To more clearly describe the structure of the present invention, the terms "distal" and "proximal" are used as terms commonly used in the art of interventional medical devices, and generally define an implant (e.g., an occluding device) as being proximal at the end proximal to the heart and distal at the end distal to the heart after release. Wherein, the axial direction refers to the direction parallel to the connecting line of the far end center and the near end center of the implant (such as an occluder); radial refers to a direction perpendicular to the above-mentioned axial direction.

The first embodiment:

referring to fig. 1 to 6, a first embodiment of the present invention provides an occluding device 100, wherein the occluding device 100 includes a first occluding member 10 and a second occluding member 20 which are oppositely arranged at intervals, and an adjusting structure which is connected between the first occluding member 10 and the second occluding member 20 and is used for adjusting the relative positions of the two occluding members.

The adjusting structure comprises a first connecting piece 60 and a second connecting piece 70, wherein a trumpet-shaped accommodating cavity 61 and a channel 64 communicated with the accommodating cavity 61 and extending to the end part of the first connecting piece 60 are arranged in the first connecting piece 60, and at least two limiting parts 62 arranged at intervals along the axial direction are convexly arranged on the inner wall of the accommodating cavity 61. One end of the second connecting member 70 is movably connected in the channel 64, the second connecting member 70 includes an elastic supporting portion 72 located in the accommodating cavity 61 and a holding portion 71 disposed on the elastic supporting portion 72, the holding portion 71 abuts against the inner wall of the accommodating cavity 61, the elastic supporting portion 72 is in a horn shape, and the elastic supporting portion 72 is elastically deformed by force to release the limit of the limiting portion 62 to the holding portion 71.

The second connecting member 70 and the first connecting member 60 move relatively under the driving of external force, and when the holding portion 71 moves to a position abutting against the position-limiting portion 62, the position-limiting portion 62 limits the holding portion 71 to move continuously. At this time, the external force is increased to elastically deform the elastic support portion 72 and release the position of the stopper portion 62 with respect to the holding portion 71, so that the second link 70 can continuously move with respect to the first link 60. When the position is adjusted to a proper position, the external force is released, and the holding part 71 is continuously abutted against the inner wall of the accommodating cavity 61 under the support of the self elasticity of the elastic support part 72, so that the current position is fixed. The present application makes it possible to adjust the relative position of the first blocking element 10 and the second blocking element 20 in the axial direction by means of the first connecting element 60 and the second connecting element 70.

Further, the adjusting structure further comprises a third connecting member 80 rotatably connected to the second connecting member 70 to adjust the angle between the first blocking member 10 and the second blocking member 20.

As shown in fig. 3 and 4, the first connecting member 60 is fixedly connected to the first plugging member 10, and the first connecting member 60 includes an accommodating chamber 61, a limiting portion 62, a pressing portion 63 and a channel 64.

The accommodating cavity 61 is in a shape of a trumpet, is located inside the first connecting piece 60, and the inner diameter of the accommodating cavity 61 gradually decreases along the direction from the first connecting piece 60 to the second connecting piece 70.

The limiting parts 62 are arranged on the inner wall of the accommodating cavity 61 in a protruding manner at intervals along the axial direction of the occluder 100, and the limiting parts 62 are annular and distributed along the circumferential direction of the occluder 100. The outer contour of the limiting portion 62 is preferably an arc surface, which can prevent the clamping stagnation phenomenon between the clamping portion 71 and the limiting portion 62 during the relative movement of the second connecting member 70 and the first connecting member 60, so that the whole adjusting process is smooth and convenient, and the convenience of clinical operation is effectively improved.

It is understood that the present embodiment does not limit the specific structure of the position-limiting portion 62, for example, in other embodiments, the inner wall of the accommodating cavity 61 is provided with a guide groove, the elastic support portion 72 moves along the track of the guide groove, and the position-limiting portion 62 is a protrusion provided in the guide groove, and the protrusion can limit the elastic support portion 72.

A passage 64 is in communication with the receiving chamber 61 and extends to an end of the first connector 60 facing the second closure member 20, and an end of the second connector 70 is movably inserted through the passage 64.

The pressing portion 63 is convexly disposed on the inner wall of the channel 64, and when the second connecting member 70 and the first connecting member 60 are driven by external force to move relatively, the pressing portion 63 radially presses the elastic supporting portion 72, so that the elastic supporting portion 72 elastically deforms toward the axial direction of the plugging device 100, the limit of the limiting portion 62 on the clamping portion 71 is better released, and the second connecting member 70 can continuously move relative to the first connecting member 60.

Moreover, the pressing portion 63 can limit the position, and when the holding portion 71 moves to abut against the pressing portion 63, the first connecting member 60 and the second connecting member 70 cannot move relative to each other, so that the first connecting member 60 and the second connecting member 70 are prevented from being completely separated.

In the present embodiment, the outer contour of the first connecting element 60 is a horn shape, but the present embodiment does not limit the shape structure of the first connecting element 60, and in other embodiments, the first connecting element 60 may also be a column or other structure, and a horn-shaped receiving cavity 61 is mainly disposed inside the first connecting element 60.

As shown in fig. 3 and 5, the second connector 70 includes a catch 71, an elastic support 72, a main body 73, and a rotating part 74.

The elastic support portion 72 is composed of a plurality of support rods distributed along the circumferential direction, one end of each support rod is connected to the main body portion 73, and the other end of each support rod extends in the axial direction away from the occluder 100, so that the elastic support portion 72 is in a horn shape as a whole, and the overall shape of the elastic support portion 72 is matched with the overall shape of the accommodating cavity 61. The elastic support part 72 can be formed by cutting and shaping a tubular structure, so that the support rods have good elasticity and a certain opening degree, and the number of the support rods can be two or more. Through setting up many spinal branchs vaulting pole, can increase elastic support portion 72 and hold the joint strength between the chamber 61, avoid the two to take place to remove at will.

The catching portion 71 is provided on the support rod and abuts against the inner wall of the accommodating chamber 61. The outer contour of the clamping portion 71 is preferably an arc surface, which can avoid the clamping stagnation phenomenon between the clamping portion 71 and the limiting portion 62 during the relative movement process of the second connecting member 70 and the first connecting member 60, so that the whole adjustment process is smooth and convenient, and the convenience of clinical operation is effectively improved.

A body 73 is movably connected within the passage 64, the body 73 preferably being of a rod-like or tubular configuration.

The rotating part 74 is disposed at one end of the main body part 73 far from the elastic support part 72, and the main body part 73 is rotatably connected to the third connecting member 90 through the rotating part 74.

As shown in fig. 3 and 6, the third connecting member 80 is fixedly connected to the second blocking member 20, and one end of the third connecting member 80 is provided with a connecting hole 81 through which the second connecting member 70 passes. The rotating portion 74 is spherical or ellipsoidal and is rotatably received in the connecting hole 81, so that the second connector 70 can rotate relative to the third connector 80 to adjust the angle between the first blocking member 10 and the second blocking member 20.

As shown in fig. 6, the connection hole 81 has a diameter-variable structure including a tapered section 811, a connection section 812, and a receiving section 813, which are sequentially connected.

The large end of the tapered section 811 extends to the end face of the third connecting member 80 facing the first connecting member 60, the two ends of the connecting section 812 are respectively and smoothly connected with the small end of the tapered section 811 and the accommodating section 813, the shape and size of the connecting section 812 are matched with the shape and size of the main body 73, and the rotating part 74 is located in the accommodating section 813. By providing the tapered portion 811, it is possible to prevent the third link 80 from interfering with the main body 73 and affecting the rotation of the rotating portion 74 when the rotating portion rotates. The end surface of the accommodating section 813 facing the connecting section 812 is an arc-shaped surface, which enables the rotating portion 74 to effectively rotate, thereby improving convenience in operation.

The connecting hole 81 further comprises a fitting section 814, the fitting section 814 extends to an end surface of the third connecting member 80 facing away from the first connecting member 60, and the fitting section 814 is fixedly connected to the third connecting pipe 90 on the second blocking member 20.

It should be noted that, although the adjusting structure of the present embodiment includes the first connecting member 60, the second connecting member 70 and the third connecting member 80, the adjusting structure adjusts the relative position of the first blocking member 10 and the second blocking member 20 in the axial direction through the first connecting member 60 and the second connecting member 70, and adjusts the relative angle between the first blocking member 10 and the second blocking member 20 through the second connecting member 70 and the third connecting member 80. However, in other embodiments, the adjusting structure may only comprise the first connector 60 and the second connector 70, as long as the first connector 60 and the second connector 70 can adjust the relative position of the first blocking piece 10 and the second blocking piece 20 along the axial direction, and in this case, the second connector 70 may be fixedly connected with the second blocking piece 20 directly or through other components.

As shown in fig. 3, the first blocking piece 10 and the second blocking piece 20 are both of a double-layer mesh disk structure woven by nickel-titanium wires. It will be appreciated that in other embodiments, the first closure member 10 or the second closure member 20 may also be of other configurations, such as a single layer disc configuration.

The occluding device 100 further comprises a connecting member 30, a first connecting tube 40, a second connecting tube 50 and a third connecting tube 90.

Wherein the first connection pipe 40 and the second connection pipe 50 are separately provided at both sides of the first blocking piece 10, and the third connection pipe 90 is provided at one side of the second blocking piece 20. The first connection pipe 40 is fixedly connected to the connection member 30, the second connection pipe 50 is fixedly connected to the body portion of the second connection member 70, and the third connection pipe 90 is fixedly connected to the fitting section 814 of the third connection member 80. The first connecting tube 40, the second connecting tube 50 and the third connecting tube 90 may be made of medical implant stainless steel or nickel titanium. The connecting member 30 is a connecting nut for threaded connection with a delivery cable (not shown).

The assembly process of the occluding device 100 in the embodiment is as follows:

fixedly connecting the first connecting pipe 40 to one side of the first plugging member 10;

connecting and fixing the first connection pipe 40 with the connection member 30;

the main body part 73 of the second connecting piece 70 passes through the accommodating cavity 61, so that the elastic supporting part 72 is positioned in the accommodating cavity 61, and the clamping part 71 is abutted to the inner wall of the accommodating cavity 61;

fixedly connecting the second connecting pipe 50 to the other side of the first blocking piece 10, and fixedly connecting the second connecting pipe 50 with the first connecting piece 60;

the main body part 73 is passed out of the connection hole 81 of the third connection member 80;

the rotating part 74 of the second connecting member 70 is fixedly connected to the main body part 73, and the rotating part 74 is arranged in the accommodating section 813 of the connecting hole 81;

the third connecting pipe 90 is fixedly connected to one side of the second plugging member 20, and the third connecting pipe 90 is fixedly connected to the third connecting member 80.

Second embodiment:

as shown in fig. 7, the second embodiment of the present invention provides an occluding device 100, wherein the occluding device 100 comprises a first occluding member 10 and a second occluding member 20 which are oppositely arranged at intervals, and an adjusting structure which is connected between the first occluding member 10 and the second occluding member 20 and is used for adjusting the relative positions of the two occluding members.

The second embodiment is different from the first embodiment in that the adjusting structure only comprises the first connecting member 60 and the second connecting member 70, and the second connecting member 70 is provided with a slot structure which enables the second connecting member 70 to be bent, thereby realizing the rotational connection of the second connecting member 70 and the second blocking member 20. The structure of the first connecting member 60 and the structure of the second connecting member 70 for cooperating with the first connecting member 60 to adjust the relative position of the two blocking members along the axial direction in the second embodiment are the same as those in the first embodiment, and the descriptions of the parts of the second embodiment that are the same as or similar to those in the first embodiment are omitted here.

As shown in fig. 8, the second connector 70 includes a catch 71, an elastic support 72, and a main body 73. The holding portion 71 and the elastic support portion 72 cooperate with the first connecting member 60 to adjust the relative positions of the two plugging members in the axial direction. The body portion 73 is provided with a notch structure, which allows the body portion 73 to be bent, and allows the angle between the two blocks to be adjusted.

Specifically, the slot structure includes at least two slots 731 spaced apart along the axial direction of the main body 73, and each slot 731 is dovetail-shaped and is distributed along the circumferential direction of the main body 73. Preferably, the main body 73 is tubular, and the slot 731 is in communication with the lumen of the main body 73.

The dovetail-shaped cutting groove 731 includes a bottom portion and a top portion, and a first inclined portion and a second inclined portion connected between the bottom portion and the top portion, the first inclined portion and the second inclined portion having opposite inclination directions, and a node layer is formed between adjacent two cutting grooves 731. Since the slots 731 are dovetail-shaped, the adjacent first and second slanted portions have a limiting effect on the joint layers embedded therebetween, so that the joint layers are not separated from each other, that is, even if one slot 731 is distributed along the entire circumference of the main body portion 73, the dovetail-shaped slot 731 can prevent the main body portion 73 from being disconnected at the slot 731.

As shown in fig. 10, the width of the slots 731 is L1, the distance between the tops of two adjacent slots 731 is L2, the maximum axial distance of the entire slot structure is L3, and the relationship between L1, L2 and L3 affects the number of slots 731 and the flexibility of the entire slot structure.

It will be appreciated that if the L3 is oversized, the slot arrangement will tend to extend into the first link 60 when the body portion 73 is moved relative to the first link 60, and because the slot arrangement has some flexibility, interference between the slot 731 and the first link 60 will tend to occur when the slot 731 is moved relative to the first link 60, affecting the overall axial movement of the body portion 73; if the size of L3 is too small, the bending performance of main body 73 is affected. Therefore, the size of L3 should be within a reasonable range, so that the slot structure will not enter the first connecting member 60 when the main body 73 moves relative to the first connecting member 60, and the slot structure should be spaced from the end of the main body 73 away from the first connecting member 60 to ensure the connection strength between the main body 73 and other structures. That is, the slot structure on the body portion 73 is located outside of the first connector 60, and the slot structure is spaced apart from the end of the body portion 73 that is distal from the first connector 60.

Further, the larger L1 is, the larger the fluctuation amount of the pitch layer between two adjacent slots 731 is, the larger the fluctuation amount is, the more the tunnel can be adapted to different lengths and angles. However, if L3 is constant, L1 is too large, which reduces the number of slits 731 and reduces the flexibility of the entire cutting structure; if L1 is too small, the amount of axial displacement of the segment between two adjacent slots 731 is small, which also reduces the flexibility of the cutting structure as a whole. Therefore, the ratio of L1/L3 in the scheme is in the range of 1/30-1/20.

Similarly, if L3 is constant, L2 is too large, which results in a decrease in the number of slots 731 and thus reduces the flexibility of the entire cutting structure, and if L2 is too small, which results in an excessive number of slots 731 and thus an excessive flexibility of the entire cutting structure, which affects the adherence of the second blocking member 20. Therefore, the ratio of L2/L3 in the scheme is in the range of 1/4-1/3.

In some embodiments, as shown in fig. 9, each dovetail-shaped slot 731 is disposed obliquely with respect to the axial direction of the body portion 73, and by disposing the slot 731 obliquely, the body portion 73 can be made more torsional in its circumferential direction.

In some embodiments, as shown in fig. 11, the cutting structure includes a slot 731, the slot 731 is spirally distributed on the body 73, and the spiral slot 731 makes the body 73 more flexible in its circumferential direction. It is noted that the cross-section of the helical slot 731 may be rectangular, dovetail, or other shape. Similarly, the ratio of L1/L3 in the scheme is 1/30-1/20, and the ratio of L2/L3 is 1/4-1/3.

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-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An occluder comprises a first occluding part and a second occluding part which are oppositely arranged at intervals, and is characterized by further comprising an adjusting structure, wherein the adjusting structure is connected between the first occluding part and the second occluding part and is used for adjusting the relative positions of the two occluding parts;

the adjusting structure comprises a first connecting piece and a second connecting piece, a horn-shaped accommodating cavity and a channel communicated with the accommodating cavity and extending to the end part of the first connecting piece are arranged in the first connecting piece, and at least two limiting parts axially arranged at intervals are convexly arranged on the inner wall of the accommodating cavity; one end of the second connecting piece is movably connected in the channel, the second connecting piece comprises an elastic supporting part and a clamping part, the elastic supporting part is positioned in the accommodating cavity, the clamping part is arranged on the elastic supporting part and abutted against the inner wall of the accommodating cavity, the elastic supporting part is horn-shaped, and the elastic supporting part can release the limit of the limiting part on the clamping part through elastic deformation under stress;

the second connecting piece includes the main part, the elastic support portion includes many bracing pieces that distribute along the circumferencial direction, the one end of bracing piece is connected on the main part, the other end of bracing piece is towards keeping away from the axis direction extension of plugging device.

2. The occlusion device of claim 1, wherein an inner wall of the channel is convexly provided with a squeezing portion.

3. The occlusion device of claim 1, wherein the inner diameter of the receiving cavity decreases in a direction from the first connector to the second connector.

4. The occlusion device of claim 1, wherein the other end of the body portion is rotatably connected to the second occlusion member.

5. The occlusion device of claim 4, wherein the adjustment structure further comprises a third connecting member, the third connecting member is fixedly connected to the second occlusion member, the third connecting member is provided with a connecting hole, and the other end of the main body portion is rotatably connected to the connecting hole.

6. The occluder of claim 5, wherein the connection hole comprises a conical section, a connecting section and a receiving section which are in communication in sequence, and wherein the second connector further comprises a rotating portion disposed on the body portion, the rotating portion being located in the receiving section.

7. The occlusion device of claim 4, wherein the body portion is provided with a slot configuration that allows the body portion to be flexed.

8. The occluder of claim 7, wherein the slot arrangement comprises at least two slots spaced axially along the body portion, the slots being dovetail-shaped; alternatively, the slot structure comprises a slot spirally distributed on the main body part.

9. The occluder of claim 1, further comprising a connecting member, a first connecting tube, a second connecting tube and a third connecting tube, wherein the first connecting tube and the second connecting tube are respectively disposed at two sides of the first occluding member, the third connecting tube is disposed at one side of the second occluding member, two ends of the adjustment structure are respectively fixedly connected to the second connecting tube and the third connecting tube, and the connecting member is fixedly connected to the first connecting tube.