CN218792641U - Anti-regurgitation stent and artificial valve device convenient to install - Google Patents

Abstract

The utility model discloses an anti regurgitation support and artificial valve device convenient to installation relates to medical instrument technical field. The utility model comprises a hollow supporting main body and a positioning piece, wherein a positioning area with an opening positioned at the far end of the anti-reflux bracket convenient to install is formed on the supporting main body, and each positioning area is arranged along the circumferential interval of the anti-reflux bracket convenient to install; the two ends of the positioning piece are respectively connected with the far-center end of the supporting main body, the positioning piece is bent towards the near-center end of the anti-regurgitation bracket convenient to install, and in an unfolded state, a clamping space for clamping the native valve leaflets is formed between the positioning piece and the supporting main body; wherein, the anti-regurgitation support convenient to installation still includes the line of acting as go-between and passes the hole, supplies the line of acting as go-between to control the diastolic degree of setting element, at least one is acted as go-between and is located the proximal end of setting element through the hole. The utility model discloses can accurately catch the position of native valve leaflet fast, improve positioning efficiency to reliability and security have been promoted.

Description

Anti-regurgitation stent and artificial valve device convenient to install

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to anti regurgitation support and artificial valve device convenient to installation.

Background

Since the way of performing surgery via a catheter has many advantages such as less trauma and fast recovery, more and more surgeries are beginning to be performed via a catheter. In the aortic valve replacement for treating aortic regurgitation, for example, the native valve of heart is replaced by artificial valve due to pathological changes, the early surgical operation requires cutting the sternum and suturing the artificial valve at the aortic valve annulus, and the replacement of aortic valve is gradually changed to transcatheter replacement. Anti-reflux stents are important instruments for transcatheter aortic valve replacement, often fabricated from nitinol.

When the operation is performed, the anti-regurgitation stent sutured with the artificial valve leaflet is usually firstly squeezed, the anti-regurgitation stent is conveyed to the proper position by the conveyor and then the two ends of the anti-regurgitation stent are released, the artificial heart valve leaflet is opened, and meanwhile, the positioning piece and the native valve leaflet are clamped. The chinese patent publication No. CN105125322a, published in 2015, 12 and 09, discloses a novel artificial valve prosthesis, which has three clamping components, and the two ends of the stent are both provided with pull heads, and the pull heads are circular holes, so that the artificial valve prosthesis can safely release the far end and the near end step by step. However, the diastole degree of the clamping assembly cannot be controlled, the position relationship between the clamping assembly and the native valve leaflet needs to be repeatedly adjusted according to the individual condition in the operation so as to position the stent, the positioning efficiency is reduced in the adjustment process, the blood vessel is easily scratched, and the operation effect is influenced.

Therefore, there is a need to develop a reflux resistant stent that is efficient and safe to install.

SUMMERY OF THE UTILITY MODEL

An object of this application provides an anti regurgitation support and artificial valve device convenient to installation, has solved anti regurgitation support because of the not high and not good enough problem of security of the positioning efficiency that the diastole one-tenth degree of centre gripping subassembly can not control and lead to.

In order to achieve the above object, the present invention provides the following technical solutions.

The application provides an anti palirrhea support convenient to installation includes:

the support body is hollow, a positioning area with an opening positioned at the distal end of the anti-reflux stent convenient to install is formed in the support body, and the positioning areas are arranged at intervals along the circumferential direction of the anti-reflux stent convenient to install;

the positioning piece is arranged in the positioning area, two ends of the positioning piece are respectively connected with the far-end of the support main body, the positioning piece is bent towards the near-center end of the anti-regurgitation support convenient to mount, in the radial direction of the anti-regurgitation support convenient to mount in a stretching state, the near-center end of the positioning piece is positioned at the outer side of the support main body, and a clamping space for clamping native valve leaflets is formed between the positioning piece and the support main body;

wherein, the anti regurgitation support convenient to installation still includes the line of acting as go-between and passes the hole, supplies to act as go-between to pass, in order to control the diastolic degree of setting element, at least one act as go-between pass the hole and locate the proximal end of setting element.

Optionally, the positioning element includes a first positioning arm, a second positioning arm and a positioning element proximal end, the first positioning arm and the second positioning arm are connected through the positioning element proximal end, and the first positioning arm and/or the second positioning arm and/or the positioning element proximal end is provided with the pull wire passing hole.

Optionally, the first positioning arm and the corresponding second positioning arm are symmetrical with respect to a first plane, and an axis of at least one of the pull wires passing through the hole is located on the first plane.

Optionally, the anti-reflux bracket convenient to mount further comprises an auxiliary piece, the auxiliary piece is arranged on at least one positioning piece, and two ends of the auxiliary piece are respectively connected with the first positioning arm and the second positioning arm; at least two V-shaped auxiliary parts with openings facing to the proximal end of the anti-reflux support convenient to install are formed between the two end parts of the auxiliary part; the outer surface of the V-shaped auxiliary part is used for being attached to the inner wall of the blood vessel.

Optionally, the V-shaped auxiliary portion includes a first auxiliary arm, a second auxiliary arm and an auxiliary portion distal end, and the first auxiliary arm and the second auxiliary arm are connected through the auxiliary portion distal end;

when the anti-reflux bracket convenient to mount is in an unfolded state, the distal end of the first auxiliary arm is bent towards the direction of the corresponding second auxiliary arm; the far end of the second auxiliary arm is bent towards the direction of the corresponding first auxiliary arm, and the near end of the first auxiliary arm is bent away from the direction of the corresponding second auxiliary arm; the proximal end of the second auxiliary arm is bent towards a direction away from the corresponding first auxiliary arm;

in the axial direction of the anti-reflux bracket convenient to install, the proximal end of the V-shaped auxiliary part is positioned in the middle of the first positioning arm;

in the axial direction, the V-shaped auxiliary portion far end in the contracted state flushes or is lower than the far end of the positioning element, and the V-shaped auxiliary portion far end in the extended state is higher than the far end of the positioning element.

Optionally, the anti-reflux stent convenient to install further comprises a fixing piece and a marking piece which are arranged at the proximal end of the positioning piece, the marking piece is arranged on the fixing piece, and the marking piece is radiopaque; the far end of the fixing piece is provided with the pull wire through hole.

Optionally, the marking member includes a first side portion and a middle marking portion, the middle marking portion corresponds to an outer surface of the fixing member, which is away from the axis of the anti-regurgitation stent convenient to mount, the first side portion is partially attached to the first side surface of the fixing member, and is partially attached to an inner surface of the fixing member, which faces the axis of the anti-regurgitation stent convenient to mount;

the marker further includes a second side portion that is partially attached to the second side surface of the fixing member and partially attached to the inner surface of the fixing member.

Optionally, the marker further includes a first fixed plate, the first fixed plate extends from one end connected to the middle marker portion to the other end, first attaches to the outer surface of the fixing member, then penetrates through the fixing member, and then bends along the inner surface of the fixing member;

the marking piece further comprises a second fixed plate, the second fixed plate is attached to the outer surface of the fixing piece from one end of the middle marking part to the other end of the middle marking part, extends, penetrates through the fixing piece and then bends along the inner surface of the fixing piece, or is attached to the outer surface of the fixing piece first, extends, penetrates through the positioning piece and then bends along the surface of the positioning piece;

the first fixed plate is connected with the far-center end of the middle marking part, and the second fixed plate is connected with the near-center end of the middle marking part;

the first fixed plate and the second fixed plate are bent along the surface of the fixing piece or the positioning piece in the same or opposite directions.

Optionally, the first fixing plate penetrates through a pull wire through hole at the distal end of the fixing piece;

the inner wall of the pull wire penetrating hole at the far end of the fixing piece comprises a connecting surface and a limiting surface, the connecting surface is used for being attached to the first fixed plate, and the limiting surface is used for clamping the first fixed plate relatively and preventing the first fixed plate from moving in the circumferential direction;

the limiting surface and the connecting surface enclose the inner wall of the pull wire through hole at the far end of the fixing piece;

the limiting surface is arched.

Optionally, the fixing part includes a fixing plate and a limiting portion, two ends of the fixing plate are respectively connected with the positioning part and the limiting portion, at a joint of the fixing plate and the limiting portion, at least part of the surface of the limiting portion protrudes out of the surface of the fixing plate, and at least part of the marking part is located on the fixing plate.

Optionally, the support body comprises:

the connecting pieces are arranged at intervals along the circumferential direction at the proximal end of the anti-reflux bracket convenient to mount;

the positioning piece and the fastening piece are arranged between the adjacent connecting pieces, the fastening piece bends towards the proximal end of the anti-reflux bracket convenient to mount, and in an unfolded state, the clamping space is formed between the positioning piece and the fastening piece;

a clamp end through which a proximal end of the anti-reflux stent is anchored for ease of installation in an installation environment.

Optionally, the fastener includes a first fastening arm, a second fastening arm, and a proximal end of the fastener connecting the first fastening arm and the second fastening arm, and the first fastening arm and the second fastening arm respectively connect two adjacent connectors;

the connecting piece comprises a positioning piece connecting part, a fastener connecting part and a sewing part, the sewing part is provided with a sewing through hole, and the sewing part is positioned between the positioning piece connecting part and the fastener connecting part; the connecting piece further comprises a connecting block and a web plate, and the connecting block is connected with the connecting part of the positioning piece through the web plate; the width of the web is smaller than that of the connecting block.

The clamping end comprises a plurality of clamping end structural units which are sequentially connected and form a hollow structure in an enclosing mode; the clamping end structure unit comprises a first clamping unit which is over against the proximal end of the fastener and is connected with the proximal end of the fastener, and a second clamping unit which is positioned between the adjacent first clamping units;

the clamping end structural unit comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which are sequentially connected and enclosed, the joint of the first connecting rod and the fourth connecting rod forms the far end of the clamping end structural unit, and the joint of the second connecting rod and the third connecting rod forms the near end of the clamping end structural unit;

when anti palirrhea support of installation is in the state of stretching out convenient to: the utility model discloses a pair of connecting rod, including first connecting rod, second connecting rod, third connecting rod, fourth connecting rod, first connecting rod, second connecting rod, third connecting rod, second connecting rod, third connecting rod, fourth connecting rod, the telecentric end of first connecting rod with the telecentric end of third connecting rod is crooked to the direction of keeping away from the other side respectively, the telecentric end of second connecting rod with the telecentric end of third connecting rod is crooked to the direction of keeping away from the other side respectively.

Optionally, the support body further includes a reinforcing mesh disposed between adjacent fasteners, and a proximal end of the reinforcing mesh is connected to a distal end of the clamping end;

the reinforcing net comprises a first self-expansion arc, two ends of the first self-expansion arc are respectively connected with two adjacent fasteners, and the middle part of the first self-expansion arc is connected with the clamping end;

the reinforcing mesh further includes a second self-expanding arc and a third self-expanding arc, the second self-expanding arc and its corresponding third self-expanding arc being distributed along the axial direction or along the circumferential direction.

Optionally, there are three connecting pieces;

the connecting pieces are uniformly distributed along the circumferential direction of the anti-reflux support convenient to install;

each positioning piece is provided with a fixing piece;

in the axial direction of the anti-reflux support convenient to install, the distance from the proximal end of the positioning piece to the proximal end of the clamping end is 4-8 mm;

when the anti-reflux support convenient to install is in an extended state: the positioning piece gradually extends towards the direction far away from the axis of the anti-reflux support convenient to install from the far end to the near end, the opening angle of the positioning piece relative to the axis is between 2 degrees and 14 degrees, the clamping end gradually extends towards the direction far away from the axis from the far end to the near end, and the outward expansion angle of the clamping end relative to the axis is between 6 degrees and 14 degrees;

the connecting piece, the setting element, the mounting, the fastener reaches screens end integrated into one piece.

The utility model also provides a prosthetic valve device, include:

an anti-reflux stent as described in any one of the preceding claims which is easy to install;

the pull wire penetrates through the pull wire through hole and is used for controlling the relaxation degree of one or more positioning parts;

the covering film is fixed on the fastener;

the artificial valve leaf is fixed on the covering film and the connecting piece and used for controlling the opening and closing of the installation channel;

and the leakage-proof skirt edge is arranged at the clamping end and used for preventing the anti-backflow support convenient to install from leaking on the side.

Compared with the prior art, the beneficial effect of this application includes:

(1) The positioning part and the support main body form a clamping space, the stay wire passing hole is formed in the positioning part, and in the positioning process of the anti-regurgitation bracket convenient to install, the stretching degree of the positioning part can be controlled as long as the stay wire is folded and unfolded, and the size of the clamping space is adjusted, so that a doctor can flexibly control the stretching of the positioning part according to the specific conditions of the installation environment, quickly and accurately capture the position of the native valve leaflet, the frequency of repeatedly adjusting the anti-regurgitation bracket is reduced, and the positioning efficiency is improved; meanwhile, in the positioning process, the stretching degree of the positioning piece is flexibly controlled to avoid scratching human tissues, so that the safety of the anti-reflux support convenient to install is improved.

(2) Because can be according to the expansion of installing the particular case ground control setting element in the art in a flexible way to the doctor can combine the operation needs to control the setting element and open relatively once more, then utilize conveyor control to be convenient for the anti-regurgitation support of installation to withdraw certain distance along blood vessel, and then realize the anti-regurgitation support of being convenient for the installation of reciprocal fine setting under the condition of not haring human tissue.

(3) Two tip and the both ends one-to-one that support the main part and form at the regional opening part in location of setting element are connected, and the middle part of setting element is towards the heart end of the crooked formation setting element of direction of apex of heart, when receiving and releasing the acting as go-between, and the setting element is round its two tip movements, will act as go-between and pass the hole setting and in the position of the heart end of setting element, and the arm of force of setting element motion is great to the degree of difficulty of control setting element motion has been reduced.

Drawings

The technical features and advantages of the present invention are more fully understood by referring to the following detailed description in conjunction with the accompanying drawings.

Fig. 1 is a front view of an easy-to-install anti-reflux stent of embodiment 1 of the present invention in an expanded state, with markers hidden;

fig. 2 is an expanded view of the anti-reflux stent convenient to install according to embodiment 1 of the present invention in a contracted state, in which the marker is hidden;

fig. 3 is a schematic structural view of an easily-installed anti-reflux stent in a stretched state according to embodiment 1 of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 1;

FIG. 5 is an enlarged view of the portion B of FIG. 2;

fig. 6 is a schematic structural view of a marker of embodiment 1 of the present invention;

fig. 7 is a partial schematic view of an anti-reflux stent for easy installation according to another embodiment of the present invention;

FIG. 8 is a partial schematic view of a flow reversal resistant stent according to yet another embodiment of the present invention;

fig. 9 is a schematic structural view of an easily-installed anti-reflux stent in a stretched state according to embodiment 2 of the present invention;

fig. 10 is an expanded view of the anti-reflux stent in a contracted state, which is convenient to install according to embodiment 2 of the present invention, with the marker member hidden;

fig. 11 is a front view of the anti-reflux stent in an extended state, with markers hidden, easy to install according to embodiment 2 of the present invention;

FIG. 12 is an enlarged view of section C of FIG. 9;

FIG. 13 is an enlarged view of section D of FIG. 11;

fig. 14 is a schematic view of a partial structure of embodiment 2 of the present invention, for showing the structure of the positioning element at the proximal end;

fig. 15 is a schematic partial structural view of embodiment 2 of the present invention, for showing the structure at the proximal end of the positioning element;

fig. 16 is a schematic structural view of a marker according to embodiment 2 of the present invention, wherein the first fixed plate, the second fixed plate, the first side portion and the second side portion are in an unfolded state;

fig. 17 is a schematic structural view of a marker according to embodiment 2 of the present invention, wherein the first fixed plate, the second fixed plate, the first side portion and the second side portion are in a bent state;

fig. 18 is a schematic structural view of an easy-to-install anti-reflux stent in an extended state according to embodiment 3 of the present invention;

FIG. 19 is an enlarged view of section E of FIG. 18;

fig. 20 is an expanded view of an easily installable regurgitation resisting stent of embodiment 4 of the present invention in a contracted state;

FIG. 21 is an enlarged view of section F of FIG. 20;

fig. 22 is a schematic structural view of an easy-to-install anti-reflux stent in an extended state according to embodiment 5 of the present invention;

FIG. 23 is an enlarged view of the portion G of FIG. 22;

fig. 24 is a schematic partial structural view of an anti-reflux bracket convenient to mount according to embodiment 5 of the present invention.

Reference numerals:

connecting piece 1

Retainer connection part 11

Fastener connecting part 12

Sewn part 13

Stitching through hole 131

Connecting block 14

Web 15

Positioning piece 2

First positioning arm 21

Second positioning arm 22

Proximal end 23 of the retainer

Strip shaped aperture 24

V-shaped auxiliary part 31

First auxiliary arm 311

Second auxiliary arm 312

Auxiliary part distal end 313

Fastener 4

First fastening arm 41

Second fastening arm 42

Fastener proximal end 43

Clamping terminal 5

Clamping end structure unit 51

First connecting rod 511

Second connecting rod 512

Third connecting rod 513

Fourth connecting rod 514

First card unit 52

Second clamping unit 53

Marking piece 6

First fixed plate 62

Middle mark part 63

Second fixed plate 64

First side 65

Second side 66

Fixing member 7

Stopper 71

Fixing plate 72

The pull wire passes through the hole 73

Connection surface 731

Limiting surface 732

First side 74

Second side 75

Reinforcing mesh 8

First self-expanding arc 81

Second self-expanding arc 82

Third self-expanding arc 83

Detailed Description

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as is understood by those of ordinary skill in the art to which the invention belongs.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Any of the following embodiments are directed to an easily installable anti-reflux stent having one end proximal to the apex of the heart and the other end distal to the apex of the heart in a use configuration, and in the description, "proximal" of a member refers to the end of the member proximal to the apex of the heart in a use configuration, and correspondingly, "distal" of a member refers to the end of the member distal to the apex of the heart in a use configuration. Any of the following embodiments relate to an easily installable anti-reflux stent that can be expanded and compressed, in a deployed state, defined as an "expanded state"; in the non-use state, for storage and protection, it is artificially compressed in the radial direction to a state, defined as the "contracted state". The following description refers to "circumferential", "axial", "radial" and "axial" as used in the context of an installation-facilitating anti-reflux stent, relative to an installation-facilitating anti-reflux stent; it should be noted that "axial" herein refers to the direction of the "axis" and does not refer to the position limitation, for example, when the "axis" extends up and down, "axial" is understood as "vertical direction" and not just the position of the "axis". Reference in the following description to the outer surface of a member refers to the surface of the member facing away from the axis of the anti-reflux stent for ease of installation, i.e. the surface opposite the inner wall of the vessel. The following description of the anti-regurgitation stent facilitating its installation involves the native leaflets defining the plane of normal operation of the native leaflets that are in abutment with each other as the closed plane and the opposite plane of the native leaflets as the non-closed plane.

Example 1

Please refer to fig. 1 to 6 to understand the present embodiment. The present embodiment provides an easily installable anti-regurgitation stent for use in heart valve replacement procedures, which in a contracted state is transported to a suitable position by a delivery device and finally works in an expanded state. The anti-regurgitation support convenient to install is hollow structure, and is hollow shape all around, and hollow part is used for setting up artifical valve leaflet to replace native valve leaflet and realize its function.

The anti-reflux support convenient to install comprises a support main body, and the support main body comprises a hollow support main body and a positioning piece 2. The support main part is hollow structure, and inside provides installation space for artificial valve leaf, and the outside supports on the vascular inner wall. The periphery of the support main body is hollow. The last one end open-ended location area that forms of supporting body, the location area is located the anti distal end of regurgitating support of being convenient for the installation, also can understand to have a plurality of orientation on the supporting body and be convenient for the installation anti structure protruding in distal end of regurgitating support, forms the location area between the adjacent bellied structure. The positioning regions are arranged at intervals along the circumference of the anti-reflux stent convenient to install.

The positioning piece 2 is arranged in the positioning area, two ends of the positioning piece 2 are respectively connected with the far-end of the supporting main body, and two ends of the positioning piece 2 are connected with two sides of the opening of the positioning area in a one-to-one correspondence mode. The positioning element 2 is bent towards the proximal end of the anti-reflux stent for ease of installation. In the expanded state, as shown in fig. 1 to 3, in the radial direction of the anti-regurgitation stent convenient to install, the proximal end of the positioning member 2 is located outside the support main body, and a holding space for holding the native valve leaflets is formed between the positioning member 2 and the support main body.

The degree of stretching of the positioning element 2 is adjustable. Anti regurgitation support convenient to installation still includes the stay wire and passes hole 73, and the stay wire supplies to act as go-between and passes through hole 73, receive and releases the degree that can control the diastole of setting element 2 of acting as go-between to adjust the relative position relation of setting element 2 and native leaflet, and adjust the position relation of centre gripping space and native leaflet, make setting element 2 can catch native leaflet fast. One or more of the pull-string passing holes 73 may be provided, wherein at least one of the pull-string passing holes 73 is provided at the proximal end of the securing member 2.

From the above, the anti-reflux stent convenient to install in the embodiment has at least the following advantages:

(1) The positioning part 2 and the support main body form a clamping space, the stay wire through hole 73 is formed in the positioning part 2, and in the positioning process of the anti-regurgitation bracket convenient to install, the unfolding degree of the positioning part 2 can be controlled only by folding and unfolding the stay wire, and the size of the clamping space is adjusted, so that a doctor can flexibly control the unfolding of the positioning part 2 according to the specific conditions of the installation environment, quickly and accurately capture the position of the native valve leaflet, reduce the times of repeatedly adjusting the anti-regurgitation bracket, and improve the positioning efficiency; meanwhile, in the positioning process, the human tissues are prevented from being scratched by flexibly controlling the stretching degree of the positioning piece 2, and the safety of the anti-reflux support convenient to install is improved.

(2) Because can be according to the expansion of installation environment's particular case ground control setting element 2 in the art in a flexible way to the doctor can combine the operation needs to control setting element 2 and open relatively once more, then utilizes the anti regurgitation support of conveyor control installation of being convenient for to withdraw the certain distance along blood vessel, and then realizes the anti regurgitation support of being convenient for to install of reciprocal fine setting under the condition of not haring human tissue.

(3) Two tip and the support main part of setting element 2 are connected at the both ends one-to-one that the opening part of location area formed, and the middle part of setting element 2 is towards the heart end of the crooked formation of the direction of apex of heart of setting element 2, receive and release when acting as go-between, and setting element 2 will act as go-between and pass the position that hole 73 set up at the heart end of setting element 2 nearly, and the arm of force of setting element 2 motion is great to the degree of difficulty of controlling the motion of setting element 2 has been reduced.

As shown in fig. 1 to 3, the anti-reflux stent which is convenient to install is in an unfolded state: the positioning element 2 extends from its distal end to its proximal end gradually in a direction away from the axis of the anti-reflux stent to be installed, which is also understood to mean that the positioning element 2 is arranged obliquely with respect to the axial direction of the anti-reflux stent to be installed, so as to form a clamping space. In the embodiment, the opening angle of the positioning piece 2 relative to the axis is 2-14 degrees, so that the fixing effect of the native valve leaflet can be improved, and the native valve leaflet is not pressed into the installation channel to influence the work of the artificial valve leaflet.

In this embodiment, each locating piece 2 adopts the same structure, has further promoted the homogeneity of the effort between the anti palirrhea support of installation of being convenient for and the blood vessel inner wall. Indeed, in other embodiments, each positioning element 2 has a different structure, and is within the scope of the present invention.

As shown in fig. 1 to 3, the positioning member 2 includes a first positioning arm 21, a second positioning arm 22 and a positioning member proximal end 23, the positioning member proximal end 23 and the proximal end of the positioning member 2 described elsewhere herein are the same concept, and the proximal end of the first positioning arm 21 and the proximal end of the second positioning arm 22 are connected by the positioning member proximal end 23. The first positioning arm 21 and/or the second positioning arm 22 and/or the proximal end 23 of the positioning member are provided with a pull wire through hole 73.

In this embodiment, the first positioning arm 21 and the corresponding second positioning arm 22 are symmetrically disposed, and are symmetric with respect to the first plane, the proximal end 23 of the positioning element is located in the middle of the positioning element 2, the first plane passes through the proximal end 23 of the positioning element, the proximal end 23 of the positioning element is provided with a pull-wire passing hole 73, the axis of the pull-wire passing hole 73 is located on the first plane, so that when the pull-wire is taken in and out, the acting force of the proximal end 23 of the positioning element can be uniformly dispersed on the first positioning arm 21 and the second positioning arm 22, in other words, the stress of the first positioning arm 21 and the second positioning arm 22 is more uniform, and the positioning element 2 is enabled to extend out a small force with the same amplitude. In other embodiments, it is within the scope of the present invention to provide a plurality of wire-passing holes 73 in the proximal end 23 of the positioning member, the wire-passing holes 73 being aligned in a first plane, or the wire-passing holes 73 in the proximal end 23 of the positioning member being out of the first plane.

As shown in fig. 2, when the anti-regurgitation stent which is in a contracted state and is convenient to install is axially cut and expanded, the first positioning arm 21 and the second positioning arm 22 are linear, the proximal end 23 of the positioning member is arc-shaped, the contact area between the proximal end 23 of the arc-shaped positioning member and the sinus floor is increased, the contact stress between the proximal end and the sinus floor is reduced, and the risk of damaging the sinus floor and the risk of annular rupture are reduced.

The bracket main body further comprises an auxiliary part 3, the auxiliary part 3 is arranged on at least one positioning part 2, at least two V-shaped auxiliary parts 31 with openings facing to the proximal end of the anti-reflux bracket convenient to install are formed between the two end parts of the auxiliary part 3, and the openings of the V-shaped auxiliary parts 31 and the openings formed by the positioning parts 2 face opposite directions. The outer surface of the V-shaped auxiliary portion 31 is adapted to fit the inner wall of the blood vessel, increasing the contact area with the inner wall of the blood vessel, and increasing the supporting force in the radial and circumferential directions.

Under the application working condition, the positioning element 2 and the auxiliary element 3 are positioned between the non-closed surface of the native valve leaflet and the inner wall of the blood vessel, the outer surfaces of the positioning element 2 and the auxiliary element 3 are contacted with the inner wall of the blood vessel, the inner surfaces of the positioning element 2 and the auxiliary element are contacted with the non-closed surface of the native valve leaflet, and the proximal end of the positioning element 2 is contacted with the sinus floor. A channel is formed between the closed surfaces of the native valve leaflets, so that space is provided for the artificial valve leaflets, and the artificial valve leaflets can be directly or indirectly arranged on the support main body to replace the native valve leaflets and realize the functions of the native valve leaflets.

As can be seen from the above description, the embodiments of the present invention have at least the following advantages:

(1) Set up auxiliary member 3 on setting element 2 to set up at the heart-proximal end of setting element 2 and act as go-between and pass hole 73, utilize auxiliary member 3 reinforcing to be convenient for the anti palirrhea support of installation stability in function, utilize to act as go-between to pass hole 73 and control setting element 2 and auxiliary member 3's the degree of stretching out simultaneously, reduce the risk that the adjustment causes setting element 2 and auxiliary member 3 friction blood vessel inner wall repeatedly in the location process.

(2) The auxiliary part 3 is arranged on the positioning part 2, and the outer surface of the auxiliary part 3 is contacted with the blood vessel, so that on one hand, the contact area between the anti-reflux support convenient to install and the inner wall of the blood vessel is increased, the static friction force between the anti-reflux support convenient to install and the inner wall of the blood vessel is improved, the risk that the anti-reflux support convenient to install displaces relative to the inner wall of the blood vessel is reduced, and the position stability of the anti-reflux support convenient to install is improved; on the other hand has still increased the area of contact of the anti regurgitation support of being convenient for the installation and native valve leaflet, has promoted the fixed effect to native valve leaflet to the stability of the anti regurgitation support of being convenient for the installation in function has been strengthened.

(3) By arranging the auxiliary part 3 at the position of the positioning area and enabling the outer surface of the auxiliary part 3 to be in contact with the blood vessel, the radial and circumferential supporting force of the anti-reflux stent convenient to install is enhanced, and the position stability of the anti-reflux stent convenient to install is further improved; simultaneously, still increased with the area of contact of native valve leaflet, promoted the fixed effect to native valve leaflet to the anti palirrhea support of being convenient for installation stability in function has further been improved.

(4) The distal end of the anti-reflux bracket convenient to install is in point contact with the inner wall of the blood vessel through the convex structure, and meanwhile, the V-shaped auxiliary part 31 is used for realizing linear contact, so that the continuity of the contact area between the distal end of the anti-reflux bracket convenient to install and the inner wall of the blood vessel in the circumferential direction is improved, and the position stability of the anti-reflux bracket convenient to install is enhanced; simultaneously, still improved the continuity of the anti palirrhea support distal end of being convenient for install in the week with native valve leaflet contact zone, further promoted the stability in position of the anti palirrhea support of being convenient for install.

(5) The opening that the setting element 2 formed is towards the distal end of the anti palirrhea support of being convenient for install, and the opening that V type auxiliary portion 31 and the opening that the setting element 2 formed are opposite in orientation, thereby the distal end of V type auxiliary portion 31 is more close to the cross section that connecting portion 1 is located, or can be in the cross section that connecting portion 1 is located, and, in the axial, the distance that the proximal end of setting element 2 is from the distal end 1 of the anti palirrhea support of installation is great, it is difficult to provide great circumferential support power for the distal end of the anti palirrhea support of installation, the distal end of V type auxiliary portion 31 is more close to the cross section that the distal end of the anti palirrhea support of installation is located on the contrary, consequently, the effort of the distal end department of the anti palirrhea support of installation that can more effectively share by auxiliary member 3, cooperate with the distal end of the anti palirrhea support of installation, improve this anti palirrhea support circumferential support power of being convenient for adjust jointly.

(6) Compared with the structure that the auxiliary member 3 is composed of one V-shaped auxiliary portion 31, the auxiliary member 3 of the present embodiment includes at least two V-shaped auxiliary portions 31, so that the angle of each V-shaped auxiliary portion 31 is smaller, the deformation of the V-shaped auxiliary portion 31 in the process from the contracted state to the expanded state is small, the V-shaped auxiliary portion 31 is not easy to break, and the reliability of the anti-reflux bracket convenient to mount is improved.

In this embodiment, the location area has threely, is provided with a setting element 2 in every location area, is provided with an auxiliary member 3 on every setting element 2, and it has two at least V type assistance-parts 31 to correspond respectively on three setting element 2 promptly to the distal end of the anti regurgitation support of being convenient for to install is more even in ascending atress in week, has reduced the risk that the distal end of the anti regurgitation support of being convenient for install distributes unevenly to lead to vascular inner wall local stress comparatively to concentrate and damage.

With reference to fig. 1 to 3, in the present embodiment, the auxiliary element 3 has two V-shaped auxiliary portions 31, that is, two V-shaped auxiliary portions 31 are respectively disposed on the three positioning elements 2, so that not only is the deformation of the V-shaped auxiliary portions 31 small during the switching process between the retracted state and the extended state ensured, but also the elasticity of the auxiliary element 3 is moderate. One end of each V-shaped auxiliary portion 31 is connected to the positioning member 2, and the other end is connected to the other V-shaped auxiliary portion 31.

As shown in fig. 1 to 3, the V-shaped auxiliary portion 31 includes a first auxiliary arm 311, a second auxiliary arm 312 and an auxiliary portion distal end 313, and the first auxiliary arm 311 and the second auxiliary arm 312 are connected by the auxiliary portion distal end 313, so that a sharp included angle is prevented from being formed between the distal end of the first auxiliary arm 311 and the distal end of the second auxiliary arm 312, thereby reducing the risk of damaging the inner wall of the blood vessel or the native leaflets during elastic deformation and during switching between the expanded state and the contracted state. In this embodiment, the distal end 313 of the auxiliary portion is of an arc-shaped structure, thereby further ensuring safety.

As shown in fig. 2, when the anti-reflux stent in a contracted state, which is easy to install, is cut in the axial direction and expanded, the first auxiliary arm 311 and the second auxiliary arm 312 are linear.

As shown in fig. 1 and 3, when the anti-reflux stent convenient to install is in the extended state, the first auxiliary arm 311 and the second auxiliary arm 312 are of a curved structure, specifically, the distal end of the first auxiliary arm 311 is curved toward the direction of the corresponding second auxiliary arm 312, and the distal end of the second auxiliary arm 312 is curved toward the direction of the corresponding first auxiliary arm 311, so that the included angle formed by the distal end of the V-shaped auxiliary portion 31 is relatively small, and when the extended state and the retracted state are switched, the distal end of the V-shaped auxiliary portion 31 can better absorb the acting force and is not easy to break. The proximal end of the first auxiliary arm 311 is bent in a direction away from the corresponding second auxiliary arm 312, and the proximal end of the second auxiliary arm 312 is bent in a direction away from the corresponding first auxiliary arm 311, so that not only can the stress be optimized, but also the included angle formed by the connecting positions of the adjacent V-shaped auxiliary parts 31 is reduced, and when the extended state and the retracted state are switched, the connecting positions can better absorb the acting force and are not easy to break. The V-shaped auxiliary portion 31 is configured as described above, that is, the bending directions of the proximal end of the first auxiliary arm 311 and the distal end of the first auxiliary arm 311 are different, and the bending directions of the proximal end of the second auxiliary arm 312 and the distal end of the second auxiliary arm 312 are different, so that the total length of the auxiliary member 3 is increased without increasing the linear distance between the proximal end and the distal end of the auxiliary member 3, the contact area between the auxiliary member 3 and the inner wall of the blood vessel and the native valve is increased, and the stability and reliability of the anti-regurgitation stent convenient to install are improved.

In the embodiment, as shown in fig. 1 and fig. 3, when the anti-reflux stent convenient to install is in the expanded state, the first auxiliary arm 311 extends smoothly along a curve from the proximal end to the distal end thereof, and the second auxiliary element 3 extends smoothly along a curve from the proximal end to the distal end thereof, which not only facilitates the optimization of the force, but also reduces the risk of rubbing the inner wall of the blood vessel and the native leaflets.

As shown in fig. 1 to 3, the bending range of the positioning element 2 at the position of the positioning element proximal end 23 is the largest, and the two ends of the auxiliary element 3 are respectively connected to the first positioning arm 21 and the second positioning arm 22, so that in the circumferential direction, the auxiliary element 3 crosses over the position corresponding to the positioning element proximal end 23 in the process of extending from one end to the other end of the auxiliary element 3, that is, the auxiliary element 3 crosses over the area with the large bending range of the positioning element 2, the stress on the positioning element 2 and the stress on the auxiliary element 3 are more uniform, and the stress distribution between the auxiliary element 3 and the positioning element 2 is optimized. Indeed, in other embodiments, it is within the scope of the present invention that both ends of the auxiliary element 3 are alternatively arranged on the first positioning arm 21 or the second positioning arm 22.

As shown in fig. 1 to 3, in the present embodiment, in the axial direction of the anti-reflux stent which is easy to install, the proximal end of the V-shaped auxiliary portion 31 is located at the middle position of the first positioning arm 21, and indeed, the proximal end of the V-shaped auxiliary portion 31 is located at the middle position of the second positioning arm 22. Under the extension state, in the axial, from the intermediate position of first locating arm 21 to its distal end, the distance between first locating arm 21 and the second locating arm 22 is great, sets up V type auxiliary portion 31 to begin to extend to the direction of keeping away from the anti palirrhea support of being convenient for installation's proximal end from the intermediate position of first locating arm 21, not only can strengthen the holding power, can also improve the fixed effect to native leaflet.

As shown in fig. 2, the auxiliary member 3 is provided with a plurality of V-shaped auxiliary portions 31, the distal end of the V-shaped auxiliary portion 31 in the contracted state is flush with the distal end of the positioning member 2 or is lower than the distal end of the positioning member 2, so that the interference of the auxiliary member 3 when the distal end of the anti-reflux stent convenient to install is connected with the delivery device is reduced, and the V-shaped auxiliary portions 31 are provided, so that in the process of the anti-reflux stent convenient to install from the contracted state to the expanded state, the opening angles of the first auxiliary arm 311 and the second auxiliary arm 312 are small, the change range of the auxiliary member 3 relative to the axial direction is small, the distal end of the V-shaped auxiliary portion 31 in the expanded state is higher than the distal end of the positioning member 2, so that the region between the two distal ends of the positioning member 2 can be supported on the inner wall of the blood vessel through the distal end of the auxiliary member 3, and the leaflet can be in contact with the inner wall of the blood vessel and the native body through the proximal end of the auxiliary member 3.

Referring to fig. 4 to 6, the anti-regurgitation stent convenient to install further comprises a marking member 6 and a fixing member 7, the proximal end of the fixing member 7 is connected to the proximal end of the positioning member 2, and the marking member 6 is detachably installed on the fixing member 7, so that the position shown by the marking member 6 is closer to the relative position information of the positioning member 2 from the sinus floor of the aorta. The marker 6 is made of radiopaque metal, and the position of the marker 6 is observed through images during the operation process to judge whether the proximal end of the positioning member 2 reaches the sinus floor.

As shown in fig. 4 to 6, in this embodiment, the distal end of the fixing member 7 is also provided with a pull wire passing hole 73, so that the function of controlling the stretching degree of the positioning member 2 and the function of positioning the anti-reflux stent convenient to install are integrated at the position of the fixing member 7, the length of the anti-reflux stent convenient to install is not increased while the two functions are realized, and the risk that the anti-reflux stent convenient to install touches his bundle or other human tissues due to the large length is avoided; meanwhile, the device also has the effects of compact structure and high space utilization rate.

In addition, in the present embodiment, by providing two wire passing holes 73 near the proximal end of the positioning member 2, namely, the wire passing hole 73 on the fixing member 7 and the wire passing hole 73 on the proximal end 23 of the positioning member, safety redundancy is provided, when one of the wire passing holes 73 is no longer suitable, the diastolic degree of the positioning member 2 can be controlled by using the other wire passing hole 73, and on the other hand, the diastolic degree of the positioning member 2 can be controlled by using both wire passing holes 73, thereby improving reliability and stability. In this embodiment, the axis of the pull wire through the hole 73 in the fixing member 7 and the axis of the pull wire through the hole 73 in the proximal end 23 of the positioning member are all in the first plane, so that the first positioning arm 21 and the second positioning arm 22 are uniformly stressed.

In this embodiment, each positioning element 2 is provided with a fixing element 7, the distal end of each fixing element 7 is provided with a pull wire passing hole 73, correspondingly, each positioning element 2 also corresponds to a marker 6, the positioning of each positioning element 2 can be pertinently positioned, the native valve leaflet is relatively regular, the position information of the anti-regurgitation stent convenient to install can be judged by observing the real-time position of any one marker 6 in the operation, the positioning element 2 can quickly capture the native valve leaflet, the anti-regurgitation stent convenient to install can be rapidly implanted into the human body, when the positioning element 2 is difficult to insert into the position between the non-closed surface of the native valve leaflet and the inner wall of the blood vessel due to the deformation of the irregular and/or native valve leaflet, one positioning element 2 favorable for positioning can be selected, the real-time position of the marker 6 corresponding to the positioning element 2 is mainly observed, the other marker 6 is auxiliarily observed, and the anti-regurgitation stent convenient to install can be rapidly implanted into the human body finally.

The fixation element 7 is gradually approached from its proximal end to its distal end towards the axis of the anti-regurgitation stent for easy installation, also understood as the fixation element 7 is arranged obliquely with respect to the axis so that the distal end of the fixation element 7 can abut against the non-occlusive face of the native leaflet.

The fixing member 7 comprises a limiting part 71 for preventing the marking member 6 from being separated from the distal end of the fixing member 7, the fixing member 7 further comprises a fixing plate 72, the marking member 6 is mounted on the fixing plate 72, one end of the fixing plate 72 is connected with the positioning member 2, the other end of the fixing plate 72 is connected with the limiting part 71, at the joint of the fixing plate 72 and the limiting part 71, at least part of the surface of the limiting part 71 protrudes relative to the surface of the fixing plate 72 to limit the marking member 6, and the pull wire passing hole 73 is formed in the limiting part 71.

In practical application, can set up the length of fixed plate 72 to be greater than the length of marker 6, marker 6 can produce the displacement along fixed plate 72 in the axial, reserve the surplus for the installation of marker 6, be convenient for install setting element 2 fast, as the replacement means, also can adopt the spacing portion 71 of far-end butt of marker 6, the near-core end of marker 6 butt fixed part 7 or the mode of butt setting element 2, so that the displacement degree of freedom of marker 6 on the axis is restrained, the risk that marker 6 scurried in the axial and leads to vascular inner wall and native leaflet damage has been got rid of.

In this embodiment, the limiting portion 71 is a plate with a circular outline, and in other embodiments, the limiting portion 71 may be a protruding structure on the fixing plate 72 or a baffle partially embedded on the fixing plate 72 as an alternative.

In this embodiment, the pull-string passing hole 73 of the fixing member 7 is at least partially exposed from the marking member 6, i.e. the marking member 6 may partially occupy or cover the pull-string passing hole, but may not completely cover the pull-string passing hole 73.

As shown in fig. 6, the marking member 6 includes a first side portion 65, a middle marking portion 63 and a second side portion 66 connected in sequence, the middle marking portion 63 is attached to the outer surface of the fixing member 7, the first side portion 65 is partially attached to the first side portion 74 of the fixing member 7 and partially attached to the inner surface of the fixing member 7, the second side portion 66 is partially attached to the second side portion 75 of the fixing member 7 and partially attached to the inner surface of the fixing member 7, wherein a surface of the fixing member 7 facing the axis of the stent for easy installation is an inner surface, a surface of the fixing member 7 facing away from the axis of the stent for easy installation is an outer surface, and the first side portion 74 and the second side portion 75 are located between the inner surface and the outer surface.

In this embodiment, the marker 6 has a C-shaped structure surrounded by the first side portion 65, the middle marker 63, and the second side portion 66, the marker 6 is disposed to penetrate from the proximal end to the distal end of the marker, and the marker 6 is disposed to surround the fixing member 7 between the proximal end and the distal end, that is, the marker 6 is disposed to surround the surface of the fixing plate 72 and is located on the fixing plate 72. In other embodiments, however, the marker 6 may alternatively include other structures, such as those described in embodiment 2 below.

During specific application, the marking piece 6 can adopt a bending plate capable of being bent, before installation, the first side portion 65, the second side portion 66 and the middle marking portion 63 can be located in the same plane, during installation, the middle marking portion 63 of the bending plate is attached to the fixing plate 72 of the fixing piece 7, then the first side portion 65 and the second side portion 66 are respectively attached to the side face of the fixing plate 72 in a bending mode, and then the inner surface of the fixing plate 72 in a bending mode is attached to the side face of the fixing plate. Or, before installation, the first side part 65 and the middle mark part 63 are bent in advance, the second side part 66 and the middle mark part 63 are also bent in advance, during installation, the middle mark part 63 of the bent plate is attached to the fixing plate 72 of the fixing part 7, the first side part 65 is attached to the first side surface 74 of the fixing plate 72, the second side part 66 is attached to the second side surface 75 of the fixing plate 72, and then the first side part 65 and the second side part 66 are respectively bent by being attached to the inner surface of the fixing plate 72.

In the present embodiment, one end of the first side portion 65 and one end of the second side portion 66 are disposed opposite to each other with a gap therebetween. In other embodiments, one end of the first side portion 65 and one end of the second side portion 66 may fit or overlap as an alternative.

The thickness of the middle mark part 63 can be set to be smaller than the thickness of other positions of the bending plate, so that the influence of the mark part 6 on the flatness of the outer side of the positioning part 2 is effectively reduced, and the influence of the concave-convex unevenness of the proximal end of the positioning part 2 on the inner wall of a blood vessel is reduced.

In this embodiment, the support body further includes a connecting member 1, a fastening member 4, and a retaining end 5. The connecting pieces 1 are positioned at the distal end of the anti-reflux support convenient to install and are arranged at intervals along the circumferential direction of the anti-reflux support convenient to install. The adjacent connecting pieces 1 are connected through the positioning pieces 2 and the fastening pieces 4, namely the positioning pieces 2 and the fastening pieces 4 are arranged between any group of adjacent connecting pieces 1.

Two ends of the positioning piece 2 are connected with two adjacent connecting pieces 1 in a one-to-one correspondence manner, and a part between the two ends of the positioning piece 2 is bent towards the proximal end of the anti-reflux support convenient to install, namely the positioning piece 2 is bent towards the direction far away from the connecting pieces 1, so that the positioning piece 2 is enclosed into a shape with an opening towards the distal end of the anti-reflux support convenient to install.

Also, the two end portions of the fastening member 4 are connected to the adjacent two connecting members 1 in a one-to-one correspondence, and the portion between the two end portions of the fastening member 4 is bent toward the proximal end of the stent for easy installation, that is, the fastening member 4 is bent in a direction away from the connecting members 1, so that the fastening member 4 is shaped to be opened toward the distal end of the stent for easy installation.

The openings formed by the positioning pieces 2 and the fastening pieces 4 are in the same direction, wherein the fastening pieces 4 are closer to the proximal end of the anti-reflux bracket convenient to install relative to the corresponding positioning pieces 2 in the axial direction; under the state of stretching out, in footpath, the nearly heart end of setting element 2 sets up for fastener 4 is outstanding, and the nearly heart end of setting element 2 is located its fastener 4's that corresponds outside promptly to form the centre gripping space that is used for the native leaflet of centre gripping between setting element 2 and the fastener 4, be convenient for setting element 2 insert between native leaflet and the blood vessel inner wall, and make native leaflet be located the centre gripping space, and then realize the location of the anti regurgitation support of being convenient for the installation.

Position end 5 locates fastener 4's nearly heart end, plays the anchoring effect, and the anti palirrhea support of installation of being convenient for passes through position end 5 anchoring in the installation environment, prevents that the anti palirrhea support of installation of being convenient for from moving towards the direction of keeping away from the apex of heart. The proximal end of the anti-reflux support convenient to install can be anchored by utilizing the clamping end 5, the distal end can be supported on the inner wall of the blood vessel through the connecting piece 1 and the auxiliary piece 3 to be fixed, and the position between the proximal end and the distal end of the anti-reflux support convenient to install can also be supported on the inner wall of the blood vessel through the positioning piece 2, so that the anti-reflux support convenient to install integrally has higher stability and reliability.

In this embodiment, the stent main body is integrally formed, in other words, the connecting member 1, the positioning member 2, the auxiliary member 3, the fastening member 4, the fixing member 7 and the clamping end 5 are integrally formed, and when the stent main body is processed, the stent main body can be cut out from the nitinol tube, and after the stent main body is cut out, the stent main body is in a contracted state, and further processed to obtain a shape in an expanded state. Indeed, in some other embodiments, the bracket main body is formed by connecting a plurality of parts (components) and is also within the protection scope of the present invention.

With continued reference to fig. 1-3. In this embodiment, there are three connecting members 1, and accordingly, the number of the positioning members 2 and the number of the fastening members 4 are three, which can better fit three native valve configurations of the aorta. In other embodiments, the number of the connecting members 1 may be set to other integer numbers, such as 2, 4, 5, etc., as an alternative.

In this embodiment, connecting piece 1 along the circumference equipartition of the anti regurgitation support of being convenient for to install, the effort between each connecting piece 1 and the vascular inner wall is more even, has reduced because of connecting piece 1 distributes unevenly and leads to the risk that vascular inner wall local stress is comparatively concentrated and damages. Indeed, in other embodiments, the interval between adjacent connecting members 1 is different, and the protection scope of the present invention is also included.

As shown in fig. 1 to 3, the connector 1 comprises a positioning member connecting part 11, a fastener connecting part 12 and a suturing part 13, wherein the suturing part 13 is provided with a suturing through hole 131 for suturing the distal end of the artificial valve; in this embodiment, the sewing through hole 131 is an elongated hole, which improves the convenience of sewing; the suture part 13 is located between the spacer connecting part 11 and the fastener connecting part 12.

As shown in fig. 1 to 3, the connecting member 1 further includes a connecting block 14 and a web 15, wherein the connecting block 14 is connected to the positioning member connecting portion 11 through the web 15; the width of the web 15 is less than the width of the connecting piece 14. During the process of conveying the anti-reflux stent convenient to install through the guide pipe, the connecting block 14 is connected with a conveying device; in the use state, the connecting block 14 is attached to the inner wall of the blood vessel.

In this embodiment, each fastener 4 adopts the same structure, has further promoted the homogeneity of the effort between the anti regurgitation support of being convenient for to install and the blood vessel inner wall. Indeed, in other embodiments, it is within the scope of the present invention for each fastener 4 to have a different structure.

The fastener 4 includes a first fastening arm 41, a second fastening arm 42, and a fastener proximal end 43 connecting the first fastening arm 41 and the second fastening arm 42, and a distal end of the first fastening arm 41 and a distal end of the second fastening arm 42 are respectively connected to two adjacent connectors 1. As shown in fig. 2, when the anti-reflux stent which is easy to install in a contracted state is cut in the axial direction and expanded, the first fastening arm 41 and the second fastening arm 42 are linear, and the proximal end 43 of the fastener is arc-shaped; when the anti-reflux stent convenient to install is in an unfolded state, the first fastening arm 41 and the second fastening arm 42 are of a bent structure.

As will be understood with reference to fig. 3, in the axial direction of the anti-reflux stent which is easy to install in the extended state, the distance H from the proximal end of the locking end 5 to the proximal end of the positioning member 2 is any value between 4mm and 8mm, which reduces the risk of the locking end 5 touching the bundle of his. This embodiment uses 6mm, and other embodiments may use 4mm or 8mm.

Referring to fig. 1 to 3, in the present embodiment, the anti-reflux stent convenient to install is in an expanded state: the clamping end 5 extends from the far end to the near end to the direction away from the axis of the anti-reflux support convenient to install gradually, and the outward expansion angle of the clamping end 5 relative to the axis of the anti-reflux support convenient to install is 6-14 degrees.

As shown in fig. 1 to fig. 3, the position-clamping end 5 includes a plurality of position-clamping end structural units 51, in this embodiment, the position-clamping end structural units 51 are connected in sequence and enclose a hollow structure, so that the proximal end of the anti-reflux stent convenient to install has a more uniform and stable positioning effect in the whole circumferential direction. In other embodiments, the retaining end structural units 51 may alternatively be spaced apart and distributed along the circumference of the anti-reflux stent for ease of installation.

The retaining end structure unit 51 includes a first retaining unit 52 facing and connected to the proximal end of the fastener 4, and a second retaining unit 53 located between the adjacent first retaining units 52. An odd number of second card units 53 are arranged between the adjacent first card units 52, for example, 5 or 7 second card units 53 are arranged, so that it can be ensured that in the switching process of the extended state and the retracted state, the deformation amount of the first card units 52 and the second card units is small, and the radial and circumferential supporting force of the whole card end 5 is in a preferred range. It should be noted that the first blocking unit 52 and the second blocking unit 53 may have the same structure, and the present embodiment defines different names based on the different positions of the two units.

As shown in fig. 1 to 3, the clamping end structure unit 51 includes a plurality of connecting rods, specifically, a first connecting rod 511, a second connecting rod 512, a third connecting rod 513 and a fourth connecting rod 514, which are sequentially connected and enclosed, and during the switching process between the contracted state and the expanded state, the deformation of the joint between the adjacent connecting rods is relatively large, and accordingly, the stress at these positions is relatively large.

The junction of the first connecting rod 511 and the fourth connecting rod 514 forms the distal end of the retaining end structural unit 51, and the junction of the second connecting rod 512 and the third connecting rod 513 forms the proximal end of the retaining end structural unit 51. When the anti-reflux bracket convenient to install is in an extended state: the distal end of the first connecting rod 511 and the distal end of the fourth connecting rod 514 are respectively bent toward the opposite direction, and the proximal end of the second connecting rod 512 and the proximal end of the third connecting rod 513 are respectively bent toward the opposite direction; the proximal end of the first connecting rod 511 and the proximal end of the fourth connecting rod 514 are respectively bent away from each other, and the distal end of the second connecting rod 512 and the distal end of the third connecting rod 513 are respectively bent away from each other; as shown in fig. 2, when the anti-reflux stent which is in a contracted state and is easy to install is cut along an axis and expanded, the first connection bar 511, the second connection bar 512, the third connection bar 513 and the fourth connection bar 514 are respectively formed in a straight line shape.

As shown in fig. 1 to 3, the support body further comprises a reinforcing mesh 8 disposed between adjacent fasteners 4, wherein the reinforcing mesh 8 is connected with the distal end of the clamping end 5 at the proximal end; the reinforcing net 8 is used for connecting the adjacent fastening pieces 4 and the clamping end 5 between the two fastening pieces 4, so that the radial and circumferential supporting force of the anti-reflux support convenient to install is improved, and the deformation degree of the anti-reflux support convenient to install under the action of external force is reduced; the reinforcing mesh 8 also effectively prevents the native leaflets from intruding into the installation channel and interfering with the operation of the prosthetic leaflets. In this embodiment, a reinforcing mesh 8 is provided between any two adjacent fasteners 4, even if the anti-reflux stent to be installed has three reinforcing meshes 8.

Reinforcing mesh 8 includes first from inflation arc 81, and two adjacent fasteners 4 are connected respectively at the both ends of first from inflation arc 81, and screens end 5 is connected at the middle part of first from inflation arc 81, and under the state of stretching out, first from inflation arc 81 forms the opening towards the telecentric end of the anti palirrhea support of being convenient for installation. The stability between the fastening member 4 and the locking end 5 is enhanced by the simultaneous connection of the two fastening members 4 and the locking end 5 by the first self-expanding arc 81. In this embodiment, the end of the first self-expanding arc 81 is connected to the middle of the first fastening arm 41 or the middle of the second fastening arm 42 to obtain better radial and circumferential support and stability.

The reinforcing mesh 8 further comprises a second self-expanding arc 82 and a third self-expanding arc 83, the openings of the second self-expanding arc 82 and the openings of the third self-expanding arc 83 facing in the expanded state. The second self-expanding arc 82 and the third self-expanding arc 83 may have different positional relationships, some of which are described below:

as shown in fig. 1-3, the second self-expanding arc 82 and its corresponding third self-expanding arc 83 are distributed along the circumference of the anti-reflux stent for ease of installation, with the two connected at an intermediate location; the two ends of the second self-expansion arc 82 are respectively connected with the fastener 4 and the first self-expansion arc 81, and the two ends of the third self-expansion arc 83 are respectively connected with the other fastener 4 and the first self-expansion arc 81;

in other embodiments, as shown in FIG. 7, the second self-expanding arcs 82 and their corresponding third self-expanding arcs 83 are distributed along the circumference of the anti-reflux stent for ease of installation, with the two being proximate but unconnected at an intermediate location; the two ends of the second self-expansion arc 82 are respectively connected with the fastener 4 and the first self-expansion arc 81, and the two ends of the third self-expansion arc 83 are respectively connected with the other fastener 4 and the first self-expansion arc 81;

as shown in fig. 8, the second self-expanding arc 82 and its corresponding third self-expanding arc 83 are distributed along the axial direction of the anti-reflux stent for ease of installation, with the two not connected at an intermediate position; two ends of the second self-expansion arc 82 are correspondingly connected with two adjacent fasteners 4 one by one, and two ends of the third self-expansion arc 83 are respectively connected with the first self-expansion arc 81;

in other embodiments, the second self-expanding arc 82 and its corresponding third self-expanding arc 83 are distributed along the axial direction of the anti-reflux stent for installation, with the two connected at an intermediate location; two ends of the second self-expansion arc 82 are connected with two adjacent fasteners 4 in a one-to-one correspondence manner, and two ends of the third self-expansion arc 83 are respectively connected with the first self-expansion arc 81.

Example 2

The present embodiment provides an anti-reflux bracket which is easy to install, and the difference from embodiment 1 lies in the structure of the marking member 6, the fixing member 7 and the positioning member 2, which will be described in detail below with reference to fig. 9 to 17.

As shown in fig. 16 and 17, the marking member 6 includes a first side portion 65, a middle marking portion 63, and a second side portion 66 connected in sequence, the middle marking portion 63 is attached to the outer surface of the fixing member 7, the first side portion 65 is partially attached to the first side surface 74 of the fixing member 7, and is partially attached to the inner surface of the fixing member 7, that is, the first side portion 65 is bent, and partially wraps the fixing member 7. The second side portion 66 partially abuts the second side surface 75 of the attachment member 7 and partially abuts the inner surface of the attachment member 7, wherein the side of the attachment member 7 facing the axis of the stent for ease of installation is the inner surface, the side facing away from the axis of the stent for ease of installation is the outer surface, and the two side surfaces between the inner and outer surfaces are the first side surface 74 and the second side surface 75, respectively.

The marker 6 further comprises a first stator 62, the first stator 62 is connected with the middle marker 63, and the first stator 62 and the middle marker are smoothly transited at the position of the connection, so as to reduce the risk of scratching the inner wall of the blood vessel; the first fixing plate 62 extends from one end connected to the middle mark portion 63 to the other end, first contacts the outer surface of the fixing member 7, then penetrates the fixing member 7, and then bends along the inner surface of the fixing member 7 to form a U-shaped structure, thereby positioning the middle mark portion 63 on the fixing member 7. As shown in fig. 16, before the marker 6 and the bracket main body are installed, the first fixing plate 62 is in a flat state, and in the installation process, the first fixing plate 62 is firstly made to penetrate through the fixing member 7, and after the middle marker 63 is adjusted to be attached to the fixing member 7, the first fixing plate 62 is bent, so that the state shown in fig. 15 and 17 is formed.

Accordingly, the fixing member 7 is provided with a hole through which the first fixing plate 62 passes. As shown in fig. 9 to 15, in the present embodiment, the first fixed plate 62 penetrates the fixing member 7 through the hole 73 by the pulling wire. As shown in fig. 13, the inner wall of the pull wire passing hole 73 includes a connection surface 731 for engaging with the first fixing plate 62 and a position-limiting surface 732, wherein the position-limiting surface 732 clamps the first fixing plate 62 relatively to prevent the first fixing plate 62 from shifting in the circumferential direction, so as to improve the stability of the marker 6. The limiting surface 732 and the connecting surface 731 enclose the inner wall of the pull wire through hole 73; the connecting surface 731 is a plane, and the restricting surface 732 is an arch. It should be noted that, the function of the hole is used herein to define whether the pull-wire passes through the hole, and the shape of the pull-wire passing through the hole at different positions may be different, for example, the pull-wire passing through hole on the fixing member 7 is surrounded by the connecting surface 731 and the limiting surface 732, and the inner wall of the pull-wire passing through hole at the proximal end of the positioning member 2 is a cylindrical surface.

In other embodiments, a square hole independent of the pull wire passing hole 73 may be alternatively provided in the fixing member 7 for the first fixing plate 62 to pass through.

In other embodiments, the marker 6 may be formed by the first side portion 65, the middle marker portion 63, the second side portion 66 and the first fixing plate 62, but in this embodiment, the marker 6 further includes a second fixing plate 64, as shown in fig. 9, 12, 14 to 17, and the second fixing plate 64 and the middle marker portion 63 are connected, and the two are smoothly transited at the connected position to reduce the risk of scratching the inner wall of the blood vessel.

As shown in fig. 9, 12, 14 and 15, the second fixed plate 64 extends from one end to the other end of the middle mark portion 63, first contacts the outer surface of the fixing member 7, then passes through the strip-shaped hole 24 on the positioning member 2, and then bends along the surface of the positioning member 2 to form a U-shaped structure, so as to position the middle mark portion 63 on the fixing member 7. As shown in fig. 16, before the marker 6 and the bracket main body are mounted, the second fixed plate 64 is in a flat state, and in the mounting process, the second fixed plate 64 is firstly made to penetrate through the fixing member 7, and after the middle marker 63 is adjusted to be attached to the fixing member 7, the second fixed plate 64 is bent to form the state shown in fig. 15 and 17. In other embodiments, as an alternative, the second fixed plate 64 may extend from one end to the other end of the middle mark 63 to be attached to the outer surface of the fixing element 7, penetrate through the fixing element 7, and then be bent along the inner surface of the fixing element 7, i.e. the strip-shaped hole 24 is disposed on the fixing element 7.

In this embodiment, the first fixed plate 62 is connected to the distal end of the middle mark 63, and the second fixed plate 64 is connected to the proximal end of the middle mark 63; the first and second fixed plates 62 and 64 are bent in the same or opposite directions along the surface of the fixing member 7 or the fixing member 2.

As shown in fig. 15 and 17, in the present embodiment, one end of the first side portion 65 and one end of the second side portion 66 are disposed opposite to each other with a gap therebetween. In other embodiments, one end of the first side portion 65 and one end of the second side portion 66 may fit or overlap as an alternative.

As shown in fig. 15 and 17, in the present embodiment, a distance exists between the other end of the first stator plate 62 and the other end of the second stator plate 64 to give way for the first side portion 65 and the second side portion 66. In other embodiments, there may alternatively be a distance between one end of the first side portion 65 and one end of the second side portion 66 to give way for the first and second stators 62, 64.

The string passing hole 73 of the securing member 2 is located in the vicinity of the bar hole 24 so that the string passing hole 73 does not interfere with the marking member 6.

It should be noted that:

the marker 6 of the present embodiment can also be understood as being formed by adding the first stationary plate 62 and the second stationary plate 64 to the C-shape of embodiment 1. The fixing member 7 of the present embodiment is different from that of embodiment 1 only in the structure in which the pulling wire passes through the hole 73. The difference between the positioning member 2 of the present embodiment and the positioning member 1 is only that the positioning member 2 of the present embodiment has the strip-shaped hole 24 and the position of the pulling wire passing hole 73 on the positioning member 2.

The rest of this embodiment is the same as embodiment 1, and the description thereof is omitted.

Example 3

This embodiment provides an anti-reflux stent which is easy to install, and differs from embodiment 1 in the structure of the fixing member 7, as shown in fig. 18 and 19, in this embodiment, the distal end of the fixing member 7 is not provided with a pull-string passing hole 73. The rest of this embodiment is the same as embodiment 1, and the description thereof is omitted.

Example 4

The present embodiment provides an anti-reflux bracket which is easy to install, and is different from embodiment 3 in that an auxiliary member is not provided on the positioning member of the present embodiment. The rest of this embodiment is the same as embodiment 1, and the description thereof is omitted.

Example 5

This embodiment provides an anti-reflux stent which is easy to install, and differs from embodiment 2 in the structure of the fixing member 7, and as shown in fig. 22 to 24, the distal end of the fixing member 7 in this embodiment is not provided with a pull wire passing hole 73, but is provided with a square hole for passing the first fixing plate 62.

The rest of this embodiment is the same as embodiment 2, and the description thereof is omitted.

Example 6

The embodiment of the utility model provides a still provide a prosthetic valve device, prosthetic valve device has included the anti regurgitation support of installation of being convenient for that any above-mentioned embodiment provided and acts as go-between, and the anti regurgitation support of installation of being convenient for forms the installation passageway, acts as go-between and is set up to pass and act as go-between and pass hole 73.

In this embodiment, each positioning element 2 is provided with a corresponding pull wire, and each positioning element 2 is independently controlled by the pull wire. In other embodiments, an anti-reflux stent that is easy to install controls the degree of expansion of the plurality of positioning members 2 by one pull wire as an alternative.

The artificial valve device also comprises a covering film, an artificial valve leaf and a leakage-proof skirt edge, wherein the covering film is fixed on the fastener 4, and the covering film is arranged around the circumference from the inner side of the anti-regurgitation bracket convenient to mount and used for preventing blood from leaking laterally through the hollowed-out position of the anti-regurgitation bracket convenient to adjust; artificial valve leaflet is fixed in on the tectorial membrane, and further with artificial valve leaflet's distal end both sides fixed mounting in the portion 13 of sewing up of connecting piece 1, the edge of artificial valve leaflet's distal end directly passes rectangular shape sews up through-hole 131 and sews up, need not to increase and sew up the gasket, traditional mode of using gasket and palirrhea support to extrude each other and fixing artificial valve leaflet relatively, at first reduced the additional spare part of the anti palirrhea support of installation of being convenient for, and the gasket has not been had, also be favorable to the anti palirrhea support's of installation further compression of being convenient for, if there is the gasket, not only influence the support compression, even can damage artificial valve leaflet under the less condition of support compression size sometimes. The leak protection shirt rim is located the nearly heart end of screens end 5 for prevent the anti palirrhea support edge leakage of being convenient for the installation.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (15)

1. An anti-reflux stent convenient to install, comprising:

the support body is hollow, a positioning area with an opening positioned at the distal end of the anti-reflux stent convenient to install is formed in the support body, and the positioning areas are arranged at intervals along the circumferential direction of the anti-reflux stent convenient to install;

the positioning piece is arranged in the positioning area, two ends of the positioning piece are respectively connected with the far-end of the support main body, the positioning piece is bent towards the near-center end of the anti-regurgitation support convenient to mount, in the radial direction of the anti-regurgitation support convenient to mount in a stretching state, the near-center end of the positioning piece is positioned at the outer side of the support main body, and a clamping space for clamping native valve leaflets is formed between the positioning piece and the support main body;

wherein, the anti regurgitation support convenient to installation still includes the line of acting as go-between and passes the hole, supplies to act as go-between to pass, in order to control the diastolic degree of setting element, at least one act as go-between pass the hole and locate the proximal end of setting element.

2. The anti-reflux stent convenient to install as claimed in claim 1, wherein the positioning member comprises a first positioning arm, a second positioning arm and a positioning member proximal end, the first positioning arm and the second positioning arm are connected through the positioning member proximal end, and the first positioning arm and/or the second positioning arm and/or the positioning member proximal end is provided with the pull wire through hole.

3. The easy-to-install anti-reflux stent of claim 2, wherein the first locator arm and its corresponding second locator arm are symmetrical with respect to a first plane on which an axis of at least one of the pull wires passing through the hole lies.

4. The easy-to-install anti-reflux bracket as set forth in claim 2, further comprising an auxiliary member, wherein the auxiliary member is disposed on at least one of the positioning members, and both ends of the auxiliary member are respectively connected to the first positioning arm and the second positioning arm; at least two V-shaped auxiliary parts with openings facing to the proximal end of the anti-reflux support convenient to install are formed between the two end parts of the auxiliary part; the outer surface of the V-shaped auxiliary part is used for being attached to the inner wall of the blood vessel.

5. The easy-to-install anti-reflux stent of claim 4,

the V-shaped auxiliary part comprises a first auxiliary arm, a second auxiliary arm and an auxiliary part far end, and the first auxiliary arm and the second auxiliary arm are connected through the auxiliary part far end;

when the anti-reflux bracket convenient to mount is in an unfolded state, the distal end of the first auxiliary arm is bent towards the direction of the corresponding second auxiliary arm; the far end of the second auxiliary arm is bent towards the direction of the corresponding first auxiliary arm, and the near end of the first auxiliary arm is bent away from the direction of the corresponding second auxiliary arm; the proximal end of the second auxiliary arm is bent towards the direction far away from the corresponding first auxiliary arm;

in the axial direction of the anti-reflux bracket convenient to install, the proximal end of the V-shaped auxiliary part is positioned in the middle of the first positioning arm;

in the axial direction, the V-shaped auxiliary portion far end in the contracted state flushes or is lower than the far end of the positioning element, and the V-shaped auxiliary portion far end in the extended state is higher than the far end of the positioning element.

6. The easy-to-install anti-reflux stent of claim 1, further comprising a securing member disposed on the proximal end of the positioning member and a marking member disposed on the securing member, the marking member being radiopaque; the far end of the fixing piece is provided with the pull wire through hole.

7. The easy-to-install anti-reflux stent of claim 1, wherein the marker comprises a first side portion and a middle marker portion, the middle marker portion corresponding to an outer surface of the fixation member facing away from the easy-to-install anti-reflux stent axis, the first side portion partially engaging the first side surface of the fixation member and partially engaging an inner surface of the fixation member facing toward the easy-to-install anti-reflux stent axis;

the marker piece further comprises a second side portion, wherein the second side portion is partially attached to the second side surface of the fixing piece and partially attached to the inner surface of the fixing piece.

8. The easy-to-install anti-reflux stent of claim 7, wherein the marker further comprises a first fixed plate, the first fixed plate extending from one end connected to the middle marker portion to the other end, first adhering to the outer surface of the fixing member, then penetrating through the fixing member, and then bending along the inner surface of the fixing member;

the marking piece further comprises a second fixed plate, the second fixed plate is attached to the outer surface of the fixing piece from one end of the second fixed plate connected with the middle marking part to the other end of the second fixed plate, extends, penetrates through the fixing piece and then bends along the inner surface of the fixing piece, or is attached to the outer surface of the fixing piece first, extends, penetrates through the positioning piece and then bends along the surface of the positioning piece;

the first fixed plate is connected with the far-center end of the middle marking part, and the second fixed plate is connected with the near-center end of the middle marking part;

the first fixed plate and the second fixed plate are bent along the surface of the fixing piece or the positioning piece in the same or opposite directions.

9. The anti-reflux stent of claim 8, which is easy to install,

the first fixing plate penetrates through a pull wire penetrating hole at the far end of the fixing piece;

the inner wall of the pull wire penetrating hole at the far end of the fixing piece comprises a connecting surface and a limiting surface, the connecting surface is used for being attached to the first fixed plate, and the limiting surface is used for clamping the first fixed plate relatively and preventing the first fixed plate from moving in the circumferential direction;

the limiting surface and the connecting surface enclose the inner wall of the pull wire through hole at the far end of the fixing piece;

the limiting surface is arched.

10. The easy-to-install anti-reflux bracket as set forth in any one of claims 6 to 9, wherein the fixing member comprises a fixing plate and a limiting part, both ends of the fixing plate are respectively connected with the positioning member and the limiting part, at the joint of the fixing plate and the limiting part, the surface of the limiting part at least partially protrudes from the surface of the fixing plate, and the marking member is at least partially located on the fixing plate.

11. The easy-to-install anti-reflux stent of claim 1, wherein the support body comprises:

the connecting pieces are arranged at intervals along the circumferential direction at the proximal end of the anti-reflux bracket convenient to mount;

the positioning piece and the fastening piece are arranged between the adjacent connecting pieces, the fastening piece bends towards the proximal end of the anti-reflux bracket convenient to mount, and in an unfolded state, the clamping space is formed between the positioning piece and the fastening piece;

the position clamping end is used for anchoring the proximal end of the anti-reflux support convenient to install in an installation environment.

12. The easy-to-install anti-reflux stent of claim 11,

the fastener comprises a first fastening arm, a second fastening arm and a proximal end of the fastener, wherein the proximal end of the fastener is connected with the first fastening arm and the second fastening arm, and the first fastening arm and the second fastening arm are respectively connected with two adjacent connecting pieces;

the connecting piece comprises a positioning piece connecting part, a fastener connecting part and a sewing part, the sewing part is provided with a sewing through hole, and the sewing part is positioned between the positioning piece connecting part and the fastener connecting part; the connecting piece further comprises a connecting block and a web plate, and the connecting block is connected with the connecting part of the positioning piece through the web plate; the width of the web plate is smaller than that of the connecting block;

the clamping end comprises a plurality of clamping end structural units which are sequentially connected and form a hollow structure in an enclosing mode; the clamping end structure unit comprises a first clamping unit which is opposite to the proximal end of the fastener and is connected with the proximal end of the fastener, and a second clamping unit which is positioned between the adjacent first clamping units;

the clamping end structural unit comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which are sequentially connected and enclosed, the joint of the first connecting rod and the fourth connecting rod forms the far end of the clamping end structural unit, and the joint of the second connecting rod and the third connecting rod forms the near end of the clamping end structural unit;

when anti palirrhea support of installation is in the state of stretching out convenient to: the utility model discloses a pair of connecting rod, including first connecting rod, second connecting rod, third connecting rod, fourth connecting rod, first connecting rod, second connecting rod, third connecting rod, second connecting rod, third connecting rod, fourth connecting rod, the telecentric end of first connecting rod with the telecentric end of third connecting rod is crooked to the direction of keeping away from the other side respectively, the telecentric end of second connecting rod with the telecentric end of third connecting rod is crooked to the direction of keeping away from the other side respectively.

13. The easy-to-install anti-reflux stent of claim 11,

the supporting main body further comprises a reinforcing net arranged between the adjacent fasteners, and the proximal end of the reinforcing net is connected with the distal end of the clamping end;

the reinforcing net comprises a first self-expansion arc, two ends of the first self-expansion arc are respectively connected with two adjacent fasteners, and the middle part of the first self-expansion arc is connected with the clamping end;

the reinforcing mesh further includes a second self-expanding arc and a third self-expanding arc, the second self-expanding arc and its corresponding third self-expanding arc being distributed along the axial direction or distributed along the circumferential direction.

14. An easy-to-install anti-reflux stent as defined in any one of claims 11 to 13, wherein:

the number of the connecting pieces is three;

the connecting pieces are uniformly distributed along the circumferential direction of the anti-reflux support convenient to install;

each positioning piece is provided with a fixing piece;

in the axial direction of the anti-reflux bracket convenient to install, the distance from the proximal end of the positioning piece to the proximal end of the clamping end is 4-8 mm;

when anti palirrhea support of installation is in the state of stretching out convenient to: the positioning piece gradually extends towards the direction far away from the axis of the anti-reflux support convenient to install from the far end to the near end, the opening angle of the positioning piece relative to the axis is between 2 degrees and 14 degrees, the clamping end gradually extends towards the direction far away from the axis from the far end to the near end, and the outward expansion angle of the clamping end relative to the axis is between 6 degrees and 14 degrees;

the connecting piece, the setting element, the mounting, the fastener reaches screens end integrated into one piece.

15. A prosthetic valve device, comprising:

an anti-reflux stent for ease of installation as claimed in any one of claims 1 to 14;

the pull wire penetrates through the pull wire through hole and is used for controlling the relaxation degree of one or more positioning parts;

the covering film is fixed on the fastener;

the artificial valve leaf is fixed on the covering film and the connecting piece and used for controlling the opening and closing of the installation channel;

and the leakage-proof skirt edge is arranged at the clamping end and used for preventing the anti-backflow support convenient to install from leaking on the side.

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