CN218792640U

CN218792640U - Anti-regurgitation stent and artificial valve device convenient to retrieve

Info

Publication number: CN218792640U
Application number: CN202221648433.4U
Authority: CN
Inventors: 吴明明; 王春光; 陈大凯
Original assignee: Koka Nantong Lifesciences Co Ltd
Current assignee: Koka Nantong Lifesciences Co Ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2023-04-07
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses an anti regurgitation support and artificial valve device convenient to retrieve relates to medical instrument technical field. The utility model comprises connecting pieces, positioning pieces and fastening pieces, namely auxiliary pieces, wherein the connecting pieces are arranged at intervals along the circumferential direction; a positioning part and a fastening part are arranged between the adjacent connecting parts, and a clamping space for clamping the native valve leaflets is formed between the positioning part and the fastening part in the unfolded state; an auxiliary part is arranged on at least one positioning part, and at least two V-shaped auxiliary parts are formed between 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; the far end of V type auxiliary portion forms the control part of acting as go-between to supply the line of acting as go-between to the diastole degree of control auxiliary member, in the anti regurgitation support's of being convenient for retrieve axial, the top surface of the V type auxiliary portion under the contraction state is not less than the top surface of connecting piece. The utility model discloses an effect of anti palirrhea support is retrieved according to the operation needs in the art.

Description

Anti-regurgitation stent and artificial valve device convenient to recover

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 retrieve.

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 original surgical operation method needs to cut the sternum and suture the artificial valve at the aortic valve annulus, which is gradually changed to the aortic valve replacement through a catheter. 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 heart valve leaflet is usually firstly squeezed and then conveyed to a proper position through a conveyor, and then the anti-regurgitation stent is released to expand to drive the artificial heart valve leaflet to open and fix the native valve leaflet at the same time.

Published 2015 at 09.12.12519, and chinese patent publication CN105125322A discloses a novel prosthetic valve prosthesis having three upper fittings. However, the distal end of the novel artificial valve prosthesis contacts the inner wall of the aorta through the three upper fitting pieces, so that the contact area is small, the static friction force is small, and the position stability of the novel artificial valve prosthesis relative to the inner wall of the aorta is poor; meanwhile, the stress borne by the inner wall of the aorta is large, and the damage to the aorta caused by the novel artificial valve prosthesis when sliding relative to the inner wall of the aorta is large; in addition, the contact area of the three upper fitting pieces and the native valve leaflets is small, the fixation effect on the native valve leaflets is limited, and the reliability of the function of the novel artificial valve prosthesis is poor. In addition, in the operation process, the situation that the support is not appropriate after the distal end is released, such as abnormal support, support puncture and the situation that the support is not matched in size, can occur, and the support cannot be recycled at the moment, so that potential safety hazards are caused.

Therefore, there is a need for a highly reliable anti-reflux stent that can be easily retrieved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti regurgitation support and artificial valve device convenient to retrieve, solved anti regurgitation support for the not good enough and not good enough problem of fixed action to native valve leaflet of the positional stability of aorta inner wall.

In order to achieve the above purpose, the utility model provides a technical scheme as follows.

The utility model provides an anti palirrhea support convenient to retrieve, include:

the connectors are arranged at intervals along the circumferential direction at the distal end of the anti-reflux bracket convenient to recover;

the positioning piece and the fastening piece are arranged between the adjacent connecting pieces, and are respectively bent towards the proximal end of the anti-reflux bracket convenient to recover; in the unfolded state: in the radial direction of the anti-regurgitation stent convenient to recover, the proximal end of the positioning piece is positioned at the outer side of the corresponding fastener, and a clamping space for clamping native valve leaflets is formed between the positioning piece and the fastener;

the auxiliary piece is arranged on at least one positioning piece, and at least two V-shaped auxiliary parts with openings facing to the proximal end of the anti-reflux support convenient to recover are formed between two end parts of the auxiliary piece; the outer surface of the V-shaped auxiliary part is used for being attached to the inner wall of the blood vessel; the distal end of V type auxiliary portion forms the control division of acting as go-between, supplies to act as go-between to pass, in order to control the diastole degree of auxiliary member on the anti regurgitation support's of being convenient for retrieve axial, under the contraction state the top surface of V type auxiliary portion is not less than the top surface of setting element connecting portion.

Optionally, the top surface of the V-shaped auxiliary portion in the contracted state is not lower than the top surface of the connecting member.

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 to form a V-shaped structure.

Optionally, when the anti-reflux stent convenient to retrieve 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 distal end of the second auxiliary arm is bent towards the direction of the corresponding first auxiliary arm;

and/or the presence of a gas in the gas,

when the anti-reflux stent convenient to recover is in an unfolded state, the proximal end of the first auxiliary arm is bent towards the direction far away from the corresponding second auxiliary arm; the proximal end of the second auxiliary arm is bent away from the corresponding first auxiliary arm.

Optionally, the positioning element includes a first positioning arm, a second positioning arm and a positioning element proximal end, and the first positioning arm and the second positioning arm are connected through the positioning element proximal end; the two ends of the auxiliary piece are respectively connected with the first positioning arm and the second positioning arm;

the anti-reflux support convenient to recover is convenient to recover, and the proximal end of the V-shaped auxiliary part at the outermost side of the auxiliary piece is positioned in the middle of the first positioning arm.

Optionally, the anti-reflux stent convenient to retrieve further comprises a fixing member and a marker, the marker is radiopaque, the proximal end of the fixing member is connected with the positioning member, and the marker is correspondingly connected with the fixing member.

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

the fixing piece convenient to recover is gradually close to the axis of the anti-regurgitation stent convenient to recover from the proximal end to the distal end thereof;

the fixing piece is provided with a stay wire through hole, and the stay wire passes through the stay wire through hole so as to control the opening angle of the positioning piece relative to the axis of the anti-reflux support convenient to recover;

the pull wire penetrates through the hole and is arranged at the far end of the fixing piece.

Optionally, the marker is C-shaped, and the marker is disposed through from a proximal end to a distal end thereof, and the marker is enclosed between the proximal end and the distal end of the fixing member;

the marker is including the first lateral part, middle part mark part and the second lateral part of connecting in order, middle part mark part with the surface laminating of mounting, first lateral part local laminating a side of mounting to local laminating the internal surface of mounting, second lateral part local laminating a side of mounting to local laminating the internal surface of mounting.

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 are respectively connected to two adjacent connectors.

Optionally, a pull wire control hole is formed in the distal end of the connecting part;

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 stay wire control hole is positioned on the connecting block.

Optionally, the anti-reflux bracket convenient to recover further comprises a clamping end arranged at the proximal end of the fastener, and the anti-reflux bracket convenient to recover is anchored in an installation environment through the clamping end;

when the anti-reflux stent convenient to retrieve is in an extended state: the clamping end extends in the direction away from the axis gradually from the far center end to the near center end of the clamping end, and the outward expansion angle of the clamping end relative to the axis is between 6 degrees and 14 degrees;

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 center of the clamping end structural unit, and the joint of the second connecting rod and the third connecting rod forms the near center of the clamping end structural unit;

when the anti-reflux stent convenient to retrieve is in an extended state: the far-center end of the first connecting rod and the far-center end of the fourth connecting rod are respectively bent towards the direction close to the other side, and the near-center end of the second connecting rod and the near-center end of the third connecting rod are respectively bent towards the direction close to the other side;

when the anti-reflux stent convenient to retrieve is in an extended state: the proximal end of the first connecting rod and the proximal end of the fourth connecting rod are respectively bent towards the direction far away from the opposite side, and the distal end of the second connecting rod and the distal end of the third connecting rod are respectively bent towards the direction far away from the opposite side.

the anti-reflux bracket convenient to recover 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 along the circumferential direction.

Optionally, the pull-wire control portion is formed at a bending position of a distal end of the auxiliary portion.

Optionally, the V-shaped auxiliary portion further includes a pull wire ring disposed at a distal end of the auxiliary portion, and the pull wire ring extends from the distal end of the auxiliary portion in a direction away from the first auxiliary arm; the central hole of the stay wire ring forms a stay wire control part.

Optionally, the V-shaped auxiliary portion further includes a wire-pulling plate disposed at a distal end of the auxiliary portion, and the wire-pulling plate extends from the distal end of the auxiliary portion in a direction away from the first auxiliary arm; the pull wire plate is provided with two through holes for the pull wires to pass through, and the two through holes form the pull wire control part.

Optionally, 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 recover;

each positioning piece is provided with one auxiliary piece;

the auxiliary part is provided with two V-shaped auxiliary parts, wherein one end of each V-shaped auxiliary part is connected with the positioning part, and the other end of each V-shaped auxiliary part is connected with the other V-shaped auxiliary part;

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

when the anti-reflux stent convenient to retrieve is in an extended state: the positioning piece gradually extends from the distal end to the proximal end of the positioning piece in a direction away from the axis of the anti-reflux stent convenient to recover, and the opening angle of the positioning piece relative to the axis is between 2 and 14 degrees;

the connecting piece, the positioning piece, the fastening piece and the auxiliary piece are integrally formed.

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

an easily retrievable anti-reflux scaffold as claimed in any one of the preceding claims, which forms an installation pathway;

the covering film is fixed on the fastener;

the artificial valve leaf is fixed on the covering film and is sewn with the connecting piece, and the artificial valve leaf is 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-reflux support convenient to recover from side leakage.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) Set up the control part of acting as go-between on the auxiliary member, during the application, make and act as go-between and pass the control part of acting as go-between, control the diastole degree of auxiliary member in a flexible way, in the operation process, after the release connecting piece, when the unsuitable condition of support appears, can act as go-between through receiving and releasing, make the auxiliary member shrink, because in the axial, the height of V type auxiliary part is not less than the setting element connecting portion, further still be not less than the connecting piece, and be provided with two at least V type auxiliary parts between the adjacent connecting piece 1, thereby the auxiliary member shrink can drive the connecting piece shrink well, and then drive the setting element, the shrink of fastener.

(2) Set up the auxiliary member on the setting element to set up the marker piece at the nearly heart end of setting element, utilize the stability of the anti palirrhea support of auxiliary member reinforcing the recovery of being convenient for in function, utilize the marker piece to realize the location of setting element and auxiliary member simultaneously, reduced the risk that the adjustment repeatedly caused setting element and auxiliary member friction blood vessel inner wall in the positioning process.

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

(4) The adjacent connecting pieces and the positioning piece between the adjacent connecting pieces form a hollowed-out area with an upward opening together, the auxiliary piece is arranged at the position of the hollowed-out area, and the outer surface of the auxiliary piece is in contact with the blood vessel, so that the radial and circumferential supporting force of the anti-reflux support convenient to recover is enhanced, and the position stability of the anti-reflux support convenient to recover 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 retrieve stability in function has further been improved.

(5) The far end of the anti-reflux support convenient to recover is in point contact with the inner wall of the blood vessel through the connecting piece, and meanwhile, the V-shaped auxiliary part is used for realizing linear contact, so that the continuity of a contact area between the far end of the anti-reflux support convenient to recover and the inner wall of the blood vessel in the circumferential direction is improved, and the position stability of the anti-reflux support convenient to recover is improved; simultaneously, still improved the continuity of the anti regurgitation support distal end of being convenient for retrieve in the week with primary valve leaflet contact zone, further promoted the stability in position of the anti regurgitation support of being convenient for retrieve.

(6) The setting element orientation is kept away from the direction bending of connecting piece, the opening orientation that the setting element formed is convenient for the anti regurgitation support's that retrieves telecentric end, and the opening orientation that V type auxiliary portion's opening and setting element formed is opposite, thereby the telecentric end of V type auxiliary portion more is close to the cross section at connecting portion place, perhaps can be in the cross section department at connecting portion place, and, in the axial, the nearly cardiac end of setting element is great apart from the distance of connecting piece, be difficult to provide great circumference holding power for the connecting piece, the telecentric end of opposite V type auxiliary portion is close to the cross section at connecting piece place more, consequently, the effort of connecting piece department can be shared more effectively to the auxiliary piece, and the connecting piece cooperation, improve this anti regurgitation support circumference holding power of being convenient for to retrieve jointly.

(7) For the structure that the auxiliary member comprises a V-shaped auxiliary portion, the auxiliary member of this embodiment includes two at least V-shaped auxiliary portions, and then the angle of every V-shaped auxiliary portion is littleer, and the deformation of V-shaped auxiliary portion from the in-process of contraction state to extension state is little, and difficult fracture has improved the reliability of the anti regurgitation support of being convenient for to retrieve.

(8) The proximal end of the anti-reflux support convenient to recover can be anchored by utilizing the clamping end, the distal end can be supported on the inner wall of the blood vessel by connecting pieces and auxiliary pieces for fixation, and the position between the proximal end and the distal end of the anti-reflux support convenient to recover can also be supported on the inner wall of the blood vessel by a positioning piece, so that the anti-reflux support convenient to recover integrally has higher stability and reliability.

Drawings

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

Fig. 1 is an expanded view of an easily-retrieved anti-reflux stent of embodiment 1 of the present invention in a contracted state, with a marker member hidden;

fig. 2 is a schematic structural view of an easily-recycled anti-reflux stent according to embodiment 1 of the present invention, wherein the easily-recycled anti-reflux stent is in an extended state;

fig. 3 is a partial structural view of the anti-reflux stent convenient to recover according to embodiment 1 of the present invention;

fig. 4 is a partial structural view of an anti-reflux stent convenient to recover according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a marker of embodiment 1 of the present invention;

fig. 6 is an expanded view of the anti-reflux stent for easy recovery according to embodiment 2 of the present invention in a contracted state, in which the marker is hidden;

fig. 7 is a schematic structural view of a recyclable anti-reflux stent according to embodiment 2 of the present invention, wherein the recyclable anti-reflux stent is in an extended state;

fig. 8 is an expanded view of the anti-reflux stent for easy recovery according to embodiment 3 of the present invention in a contracted state, in which the marker is hidden;

fig. 9 is a schematic structural view of the conveniently-recycled anti-reflux stent in an extended state according to embodiment 3 of the present invention;

fig. 10 is an expanded view of the anti-reflux stent for easy recovery according to embodiment 4 of the present invention in a contracted state, in which the marker is hidden;

fig. 11 is a schematic structural view of the conveniently-recycled anti-reflux stent in an extended state according to embodiment 4 of the present invention;

fig. 12 is a partial structural view of the anti-reflux stent convenient to recover according to embodiment 4 of the present invention;

fig. 13 is an expanded view of the anti-reflux stent for easy recovery according to embodiment 5 of the present invention in a contracted state, in which the marker is hidden;

fig. 14 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 6 of the present invention in a contracted state with markers hidden;

fig. 15 is a schematic structural view of an anti-reflux stent convenient to recover according to embodiment 6 of the present invention in an extended state;

fig. 16 is an expanded view of the anti-reflux stent for easy recovery according to embodiment 7 of the present invention in a contracted state, in which the marker is hidden;

fig. 17 is a schematic structural view of an anti-reflux stent convenient to recover according to embodiment 7 of the present invention in an extended state;

fig. 18 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 8 of the present invention in a contracted state, in which the marker is hidden;

fig. 19 is a schematic structural view of the conveniently-recycled anti-reflux stent of embodiment 8 of the present invention in a stretched state;

fig. 20 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 9 of the present invention in a contracted state with the marker member hidden;

fig. 21 is a schematic structural view of the conveniently-recycled anti-reflux stent of embodiment 9 of the present invention in a stretched state;

fig. 22 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 10 of the present invention in a contracted state, with the markers hidden;

fig. 23 is a schematic structural view of the conveniently-recycled anti-reflux stent of embodiment 10 of the present invention in a stretched state;

fig. 24 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 11 of the present invention in a contracted state, in which the marker is hidden;

fig. 25 is a schematic structural view of the conveniently-recycled anti-reflux stent of embodiment 11 of the present invention in a stretched state;

fig. 26 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 12 of the present invention in a contracted state with markers hidden;

fig. 27 is a schematic structural view of the conveniently-recycled anti-reflux stent of embodiment 12 of the present invention in a stretched state;

fig. 28 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 13 of the present invention in a contracted state with the marker member hidden;

fig. 29 is a schematic structural view of the conveniently-recycled anti-reflux stent of embodiment 13 of the present invention in a stretched state;

fig. 30 is an expanded view of the anti-reflux stent for easy retrieval according to embodiment 14 of the present invention in a contracted state with markers hidden;

fig. 31 is a schematic structural view of the conveniently-recycled anti-reflux stent of embodiment 14 of the present invention in a stretched state;

fig. 32 is an expanded view of the anti-reflux stent for easy retrieval in a contracted state according to embodiment 15 of the present invention, in which the marker is hidden;

fig. 33 is a schematic structural view of the anti-reflux stent convenient to retrieve according to embodiment 15 of the present invention in an extended state.

Reference numerals are as follows:

connecting piece 1

Retainer connection part 11

Fastener connecting part 12

Sewn part 13

Stitching through hole 131

Connecting block 14

Web 15

Stay wire control hole 16

Keeper 2

First positioning arm 21

Second positioning arm 22

Proximal end 23 of the retainer

Auxiliary member 3

V-shaped auxiliary part 31

First auxiliary arm 311

Second auxiliary arm 312

Auxiliary part distal end 313

Wire control section 32

Pull ring 33

Center hole 331

Pull plate 34

Via 341

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

Middle mark part 61

First side 62

Second side 63

Fixing member 7

Stopper 71

Fixing plate 72

The pull wire passes through the hole 73

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 in the present specification and claims should have the same meaning as commonly understood by one of ordinary skill in the art to which this 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," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. 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 anti-reflux stent that facilitates retrieval with one end near the apex of the heart and the other end away from the apex of the heart in a use configuration, and in the description, "proximal" of a member refers to the end of the member that is near the apex of the heart in a use configuration, and correspondingly, "distal" of a member refers to the end of the member that is away from the apex of the heart in a use configuration. Any of the following embodiments relate to a readily retrievable 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 the retrieval-facilitating anti-reflux stent, relative to the retrieval-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". When reference is made in the following description to the outer surface of a member, it is meant the side of the member facing away from the axis of the anti-reflux stent which facilitates retrieval, i.e. the side opposite the inner wall of the vessel. The following description of the anti-regurgitation stent facilitating its retrieval 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 5 for understanding. The embodiment of the utility model provides an anti palirrhea support convenient to retrieve for in the heart valve replacement art, the anti palirrhea support of being convenient for retrieve under the contraction state transports through conveyor and releases behind the suitable position, finally carries out work with the extension state. The anti-regurgitation support convenient to retrieve is hollow structure, and it is fretwork form all around, and hollow part is used for setting up artifical valve leaflet to realize native valve leaflet's function.

The anti-reflux support convenient to recycle comprises a support main body and a marking piece 6, wherein the support main body adopts a hollow structure, and the periphery of the support main body is hollowed out. The bracket main body comprises a connecting piece 1, a positioning piece 2, an auxiliary piece 3, a fastening piece 4 and a clamping end 5.

The connecting piece 1 is positioned at the distal end of the anti-reflux stent convenient to recover and is arranged at intervals along the circumferential direction of the anti-reflux stent convenient to recover. The adjacent connecting pieces 1 are connected through the positioning piece 2, namely the positioning piece 2 is 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 bracket convenient to recover, 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 bracket convenient to recover.

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 retrieval, 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 retrieval.

The openings formed by the positioning parts 2 and the fastening parts 4 are in the same direction, wherein the fastening parts 4 are closer to the proximal end of the anti-reflux bracket convenient to recover relative to the corresponding positioning parts 2 in the axial direction; under the state of stretching out, in footpath, the nearly heart end of setting element 2 is for fastener 4 outstanding setting, and the nearly heart end of setting element 2 is located its corresponding fastener 4's the 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 inserts between native leaflet non-closed face 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 retrieve.

An 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 recover are formed between the two ends 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. The distal end of V type auxiliary portion forms the control part 32 of acting as go-between, supplies to act as go-between to pass, with control the diastole degree of auxiliary member 3 in the anti palirrhea support's of being convenient for retrieve axial, under the contraction state the top surface of V type auxiliary portion is not less than setting element connecting portion 11, preferably, is not less than the top surface (telecentric end) of connecting piece 1.

Position end 5 locates fastener 4's nearly heart end, plays the anchoring effect, and the anti palirrhea support of being convenient for retrieve passes through position end 5 anchoring in the installation environment, prevents that the anti palirrhea support of being convenient for retrieve from moving towards the direction of keeping away from the apex of heart.

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. The closed surfaces of the native leaflets define a channel therebetween, and the fastener 4 is located inside the channel, i.e. the fastener 4 is located on the side of the closed surfaces of the native leaflets. The channel provides space for the artificial leaflets, which can be mounted directly or indirectly on the fasteners 4 to replace and fulfill the function of the native leaflets.

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

(1) Set up the control part 32 of acting as go-between on auxiliary member 3, during the application, make the stay wire pass the control part 32 of acting as go-between, control the diastole degree of auxiliary member 3 in a flexible way, in the operation process, after release connecting piece 1, when the unsuitable condition of support appears, can be through receiving and releasing the stay wire, make auxiliary member 3 shrink, or through pulling 3 whole supports of auxiliary member shrink of acting as go-between withdraw conveyor, withdraw the support from the human body, because in the axial, V type auxiliary portion's height is not less than setting element connecting portion 11, further still be not less than connecting piece 1, and be provided with two at least V type auxiliary portions between the adjacent connecting piece 1, thereby auxiliary member shrink can drive connecting piece 1 shrink well, and then drive the setting element, the shrink of fastener.

(2) The auxiliary part 3 is arranged on the positioning part 2, and the stability of the anti-reflux support convenient to recover is enhanced by the auxiliary part 3 in function.

(3) 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 stent convenient to recover and the inner wall of the blood vessel is increased, the static friction force between the anti-reflux stent convenient to recover and the inner wall of the blood vessel is improved, the risk that the anti-reflux stent convenient to recover displaces relative to the inner wall of the blood vessel is reduced, and the position stability of the anti-reflux stent convenient to recover is improved; on the other hand has still increased the area of contact of the anti regurgitation support of being convenient for to retrieve 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 to retrieve in the function has been strengthened.

(4) The adjacent connecting pieces 1 and the positioning pieces 2 between the adjacent connecting pieces jointly form a hollow area with an upward opening, the auxiliary piece 3 is arranged at the position of the hollow area, and the outer surface of the auxiliary piece 3 is in contact with blood vessels, so that the radial and circumferential supporting force of the anti-reflux stent convenient to recover is enhanced, and the position stability of the anti-reflux stent convenient to recover 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 retrieve stability in function has further been improved.

(5) The far end of the anti-reflux bracket convenient to recycle is in point contact with the inner wall of the blood vessel through the connecting piece 1, and meanwhile, the V-shaped auxiliary part 31 is in linear contact with the far end of the anti-reflux bracket convenient to recycle, so that the continuity of the contact area of the far end of the anti-reflux bracket convenient to recycle 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 recycle is improved; simultaneously, still improved the continuity of the anti regurgitation support distal end of being convenient for retrieve in the week with primary valve leaflet contact zone, further promoted the stability in position of the anti regurgitation support of being convenient for retrieve.

(6) The orientation of setting element 2 is crooked keeping away from the direction of connecting piece 1, the opening orientation that setting element 2 formed is convenient for the anti regurgitation support's that retrieves telecentric end, and the opening orientation that V type auxiliary portion 31 and setting element 2 formed is opposite, and V type auxiliary portion 31's telecentric end is closer to the cross section at connecting portion 1 place, and, in the axial, the distance of the proximal end of setting element 2 apart from connecting piece 1 is great, be difficult to provide great circumference holding power for connecting piece 1, opposite V type auxiliary portion 31's telecentric end is closer to the cross section at connecting piece 1 place more, consequently, auxiliary member 3 can share the effort of connecting piece 1 department more effectively, with the cooperation of connecting piece 1, improve this anti regurgitation support circumference holding power of being convenient for to retrieve jointly.

(7) 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 easily broken, and the reliability of the anti-regurgitation stent convenient to recycle is improved.

(8) The proximal end of the anti-reflux support convenient to recover can be anchored by utilizing the clamping end 5, the distal end can be supported on the inner wall of the blood vessel by the connecting piece 1 and the auxiliary piece 3 for fixation, and the position between the proximal end and the distal end of the anti-reflux support convenient to recover can also be supported on the inner wall of the blood vessel by the positioning piece 2, so that the anti-reflux support convenient to recover integrally has higher stability and reliability.

As shown in fig. 1 and 2, in the present embodiment, there are three connecting members 1, and accordingly, the number of the positioning members 2 and the fastening members 4 is three, so as to better fit the 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.

As shown in fig. 1 and fig. 2, in this embodiment, the connecting members 1 are uniformly distributed along the circumferential direction of the anti-reflux stent convenient to recover, the acting force between each connecting member 1 and the inner wall of the blood vessel is relatively uniform, and the risk of damage caused by relatively concentrated local stress of the inner wall of the blood vessel due to uneven distribution of the connecting members 1 is reduced. Indeed, in other embodiments, the interval between adjacent connecting members 1 is different, and the protection scope of the present invention is also included.

In this embodiment, each setting element 2 adopts the same structure, and each fastener 4 adopts the same structure, has further promoted the homogeneity of the effort between the anti palirrhea support of being convenient for retrieve and the blood vessel inner wall. Indeed, in other embodiments, it is within the scope of the present invention to employ different structures for each positioning element 2 and/or different structures for each fastening element 4.

In this embodiment, be provided with an auxiliary member 3 on every setting element 2, it has two at least V type auxiliary 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 retrieve is more even in ascending atress of week, 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.

As shown in fig. 1 and fig. 2, in the present embodiment, the auxiliary member 3 has two V-shaped auxiliary portions 31, that is, two V-shaped auxiliary portions 31 are respectively disposed on three positioning members 2, so that it is ensured that the V-shaped auxiliary portions 31 are less deformed in the switching process between the retracted state and the extended state, and at the same time, the elasticity of the auxiliary member 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.

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 V-shaped structure formed by connecting the first auxiliary arm 311 and the second auxiliary arm 312 through the auxiliary portion distal end 313 avoids a sharp included angle formed between the distal end of the first auxiliary arm 311 and the distal end of the second auxiliary arm 312, so as to reduce the risk of damaging the inner wall of the blood vessel or the native valve leaflet during the elastic deformation process and during the process of switching the extended 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.

In this embodiment, the pulling-line control portion 32 is formed at the bending position of the distal end 313 of the auxiliary portion, that is, the pulling-line control portion 32 is embodied in the form of an arc-shaped surface. Indeed, in other embodiments, the pull wire control portion 32 may alternatively take the form of a single hole or a plurality of holes.

As shown in fig. 1, when the anti-reflux stent which is easily retrieved in a contracted state 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. 2, when the anti-reflux stent convenient to retrieve is in the extended state, the first auxiliary arm 311 and the second auxiliary arm 312 are curved, 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 part 31 is configured as 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, 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, and under the condition that the linear distance between the proximal end and the distal end of the auxiliary member 3 is not increased, the total length of the auxiliary member 3 is increased, 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 recover are improved.

In the present embodiment, as shown in fig. 2, when the anti-regurgitation stent convenient for recovery 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 arm 312 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 and fig. 2, the positioning member 2 includes a first positioning arm 21, a second positioning arm 22 and a positioning member proximal end 23, 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, in this embodiment, the first positioning arm 21 and the second positioning arm 22 are symmetrically disposed, and the positioning member proximal end 23 is located at the middle position of the positioning arm. As shown in fig. 2, when the anti-regurgitation stent which is convenient to recycle and is in a contracted state is cut along the axial direction and is unfolded, 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 23 of the arc-shaped positioning member and the sinus floor is reduced, and the risk of damaging the sinus floor and the risk of rupture of the valve annulus are reduced.

As shown in fig. 1 and 2, 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 with 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 large bending range of the positioning element 2, the stress of the positioning element 2 and the stress of 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, as an alternative, both ends of the auxiliary element 3 are arranged on the first positioning arm 21 or the second positioning arm 22, which is also within the protection scope of the present invention.

As shown in fig. 1 and fig. 2, in the axial direction of the anti-regurgitation stent for easy recovery in the present embodiment, the proximal end of the V-shaped auxiliary part 31 is located at the middle position of the first positioning arm 21, and indeed, the proximal end of the V-shaped auxiliary part 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 location arm 21 to its distal end, the distance between first location arm 21 and the second location arm 22 is great, sets up V type auxiliary part 31 to begin to extend to the direction of keeping away from the anti regurgitation support's of being convenient for to retrieve proximal end from the intermediate position of first location arm 21, not only can strengthen the holding power, can also improve the fixed effect to native leaflet.

As shown in fig. 2, in the course of the anti-regurgitation stent convenient for recovery from the contracted state to the expanded state, the auxiliary member 3 provided with the plurality of V-shaped auxiliary parts 31 has a small opening angle of the first auxiliary arm 311 and the second auxiliary arm 312, so that the auxiliary member 3 has a small variation range in the direction of the axis, and the distal end of the V-shaped auxiliary part 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 by the distal end of the auxiliary member 3, and can also be in contact with the inner wall of the blood vessel and the native leaflets by the proximal end of the auxiliary member 3.

As shown in fig. 2, in the present embodiment, the anti-reflux stent which is easy to be recovered is in an extended state: the positioning element 2 gradually extends from the distal end to the proximal end thereof in a direction away from the axis of the anti-regurgitation stent facilitating the retrieval, which can also be understood as the positioning element 2 is disposed obliquely with respect to the axial direction of the anti-regurgitation stent facilitating the retrieval, so that the proximal end of the positioning element 2 abuts against the non-closed surface of the native valve leaflet and is inserted into the bottom of the aortic sinus. 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 leaflets can be improved, and the native valve leaflets cannot be pressed into the mounting channel to influence the work of the artificial valve leaflets.

In the axial direction of the anti-reflux stent convenient to recover in the extended state, the distance from the tail end of the proximal end of the positioning piece 2 to the tail end of the proximal end of the clamping end 5 is an arbitrary value between 4mm and 8mm, and at the moment, the risk that the clamping end 5 touches the bundle of his can be reduced. This embodiment uses 6mm, and other embodiments may use 4mm or 8mm.

In this embodiment, the anti-reflux stent for easy retrieval further comprises an anchoring member 7 and a marker member 6, the marker member 6 being made of a radiopaque metal, the marker member 6 being directly or indirectly connected to the proximal end of the positioning member 2. The marking member 6 is connected to the positioning member 2 through the fixing member 7, and in other embodiments, it is within the scope of the present invention to connect the marking member 6 directly to the proximal end of the positioning member 2 as an alternative.

Referring to fig. 1 to 4, the proximal end of the fixing member 7 is connected to the positioning member 2, the marking member 6 is detachably mounted on the fixing member 7, and during the operation, the position of the marking member 6 is observed through images to determine whether the proximal end of the positioning member 2 reaches the sinus floor.

In this embodiment, the fixation member 7 gradually approaches the axis of the anti-regurgitation stent for easy retrieval from the proximal end to the distal end thereof, and it can be understood that the fixation member 7 is disposed obliquely with respect to the axis so that the distal end of the fixation member 7 can abut against the non-closed surface of the native leaflet.

In this embodiment, the fixing member 7 includes a position-limiting portion 71 for preventing the mark member 6 from being separated from the distal end of the fixing member 7, the fixing member 7 further includes a fixing plate 72, the mark member 6 is mounted on the fixing plate 72, one end of the fixing plate 72 is connected to the positioning member 2, the other end of the fixing plate 72 is connected to the position-limiting portion 71, and at the joint of the fixing plate 72 and the position-limiting portion 71, at least a part of the surface of the position-limiting portion 71 protrudes relative to the surface of the fixing plate 72 to limit the position of the mark member 6. 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 in 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 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 plate partially embedded on the fixing plate 72 as an alternative.

The telecentricity of mounting 7 is equipped with and acts as go-between and passes hole 73, acts as go-between and passes hole 73 confession and acts as go-between to the open angle of axis of the anti regurgitation support of control setting element 2 for being convenient for to retrieve, in the application, combine concrete environment in the art, utilize the opening angle of the control setting element 2 that acts as go-between, when the support is withdrawn from in needs moreover, can open the setting element through acting as go-between, prevent that setting element and fastener clamp from closing native valve leaflet, produce the phenomenon of tearing native valve leaflet at the withdrawal in-process. The drawstring passage aperture 73 is at least partially exposed to the marking member 6, i.e., the marking member 6 may partially occupy or cover the drawstring passage aperture 341, but may not entirely cover the drawstring passage aperture 73.

(1) Utilize locating element 2 and fastener 4 to form the clamping space, set up the fixed part 7 on the locating element 2, and set up and act as go-between and pass the hole 73 on the fixed part 7, position the anti-regurgitation support easy to retrieve, as long as receive and release and act as go-between and can control the stretching degree of the locating element 2, adjust the size of the clamping space, therefore, the doctor can control the stretching of the locating element 2 flexibly according to the concrete situation of the installation environment, catch the position of the native valve leaflet fast and accurately, has reduced the number of times of regulating the anti-regurgitation support repeatedly, has raised the positioning efficiency; meanwhile, in the positioning process, the human tissue is 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 recycle is improved.

(2) The fixing piece 7 is arranged at the proximal end of the positioning piece 2, the marker 6 is installed by using the fixing piece 7, and a doctor can observe the position of the marker 6 in an image in an operation, so that whether the proximal end of the positioning piece 2 reaches the sinus floor or not is judged quickly, and the positioning information of the anti-reflux stent convenient to recycle is determined.

(3) The stay wire is arranged on the fixing part 7 through the hole 73, the marking part 6 is arranged on the fixing part 7, the function of controlling the stretching degree of the positioning part 2 and the function of positioning the anti-reflux bracket convenient to recover are integrated at the position of the fixing part 7, the length of the anti-reflux bracket convenient to recover can not be increased while the two functions are realized, and the risk that the anti-reflux bracket convenient to recover touches the bundle of his or other human tissues due to large length is avoided; meanwhile, the device also has the effects of compact structure and high space utilization rate.

(4) Because can be according to the expansion of installing the particular case of environment control setting element 2 in the art in a flexible way to the doctor can combine the operation needs to control setting element 2 shrink, then utilizes conveyor control to be convenient for the anti-regurgitation support of retrieving to withdraw certain distance along blood vessel, and then realizes reciprocating the anti-regurgitation support of fine setting being convenient for retrieve under the condition of not haring human tissue.

(5) Two tip and two connecting piece 1 one-to-one of setting element 2 are connected, and the middle part of setting element 2 is towards the heart point's the crooked nearly heart end that forms setting element 2 of direction, and when acting as go-between and receive, setting element 2 will act as go-between and move around its two tip, will pass the hole 73 setting and in the position of setting element 2 nearly heart end, 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.

In this embodiment, a fixing member 7 is provided at the proximal end of each positioning member 2, a pull wire passing hole 73 is provided in each fixing member 7, and the pull wire passing hole 73 is provided in the stopper portion 71. Utilize and act as go-between each setting element 2 of control to open in step and contract, can make each setting element 2 open angle the same, setting element 2 catches native valve leaf fast, thereby plant the human body rapidly with this anti regurgitation support of being convenient for to retrieve, when being difficult to insert setting element 2 between the non-closed face of native valve leaf and the blood vessel inner wall because of pathological change warp in the face of irregular and/or native valve leaf simultaneously, can open special angle with this seizure corresponding native valve leaf through this setting element 2 of independent control of acting as go-between, thereby can improve accuracy and efficiency to the anti regurgitation support location of being convenient for to retrieve in the art.

As shown in fig. 5, in the present embodiment, the marking member 6 is C-shaped, and the marking member 6 is disposed through from the proximal end to the distal end thereof, and the marking member 6 is enclosed between the proximal end and the distal end of the fixing member 7, that is, the marking member 6 is disposed around the surface of the fixing plate 72. The marking member 6 includes a first side portion 62, a middle marking portion 61, and a second side portion 63 connected in sequence, the middle marking portion 61 is attached to the outer surface of the fixing member 7, the first side portion 62 is partially attached to one side surface of the fixing member 7 and partially attached to the inner surface of the fixing member 7, and the second side portion 63 is partially attached to one side surface of the fixing member 7 and partially attached to the inner surface of the fixing member 7.

In the present embodiment, one end of the first side portion 62 and one end of the second side portion 63 are disposed opposite to each other with a gap therebetween. In other embodiments, one end of the first side portion 62 and one end of the second side portion 63 may fit or overlap as an alternative.

During specific application, the marking piece 6 can be a bending plate capable of being bent, during installation, the middle marking part 61 of the bending plate is attached to the fixing plate 72 of the fixing piece 7, the first side part 62 is attached to one side face of the fixing piece 7, the second side part 63 is attached to the other side face of the fixing piece 7, and then the first side part 62 and the second side part 63 are attached to the inner surface of the fixing plate 72 to be bent respectively.

In specific application, the thickness of the middle marking part 61 can be set to be smaller than the thicknesses of the first side part 62 and the second side part 63, so that the influence of the marking part 6 on the outside flatness of the positioning part 2 is effectively reduced, and the influence of the unevenness of the proximal end of the positioning part 2 on the inner wall of a blood vessel is reduced.

As shown in fig. 1 and 2, the fastening member 4 includes a first fastening arm 41, a second fastening arm 42, and a fastening member 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 connecting members 1. As shown in fig. 1, when the anti-reflux stent which is easy to be recovered 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 recycle is in an unfolded state, the first fastening arm 41 and the second fastening arm 42 are of a bent structure.

As shown in fig. 1 and 2, 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 and 2, 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. In the process of conveying the anti-reflux stent convenient to recover through the catheter, 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.

As shown in fig. 2, in this embodiment, the anti-reflux stent for easy retrieval 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 bracket convenient to recover gradually, and the outward expansion angle of the clamping end 5 relative to the axis of the anti-reflux bracket convenient to recover is 6-14 degrees.

As shown in fig. 1 and fig. 2, the blocking end 5 includes a plurality of blocking end structural units 51, and in this embodiment, the blocking 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 recover 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 easy retrieval.

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, for example, 5 or 7 second card units 53, are disposed between the adjacent first card units 52, so that it can be ensured that, in the switching process between the extended state and the retracted state, the deformation of the first card units 52 and the second card units is small, and the radial and circumferential supporting forces of the entire card end 5 are in a preferred range. It should be noted that the first detent unit 52 and the second detent unit 53 may have the same structure, and the present embodiment defines different names based on the different positions of the two.

As shown in fig. 2, the clamping end structure unit 51 includes a plurality of connecting rods, specifically including 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 amount of the joints between 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 stent convenient to recover is in an extended state: the distal ends of the first connecting rod 511 and the fourth connecting rod 514 are respectively bent toward the opposite direction, and the proximal ends of the second connecting rod 512 and 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 easily retrieved in a contracted state 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 and 2, the anti-reflux stent convenient to recycle further comprises a reinforcing mesh 8 arranged between adjacent fasteners 4, wherein the proximal end of the reinforcing mesh 8 is connected with the distal end of the clamping end 5; 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 recycle is improved, and the deformation degree of the anti-reflux support convenient to recycle 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 adjacent two of the fastening members 4, even if the anti-reflux stent for recycling 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 retrieve. The simultaneous connection of the two fastening elements 4 and the locking end 5 by means of the first self-expanding arc 81 increases the stability between the fastening elements 4 and the locking end 5. 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 supporting force 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. In this embodiment, as shown in fig. 1 and 2, 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 retrieval, and are not connected at an intermediate position; 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 stent convenient to recycle, which is different from embodiment 1 in the structure of the V-shaped auxiliary portion 31, specifically, the position and structure of the stay wire control portion 32.

As shown in fig. 6 and 7, in the present embodiment, the V-shaped auxiliary portion 31 further includes a pull ring 33 provided at the auxiliary portion distal end 313, and the pull ring 33 extends from the auxiliary portion distal end 313 in a direction away from the first auxiliary arm 311; in the axial direction, the top surface of the pull ring 33 is not lower than the top surface of the retainer connecting portion 11, preferably not lower than the top surface of the connecting member 1. The stay wire control part 32 is formed at the central hole 331 of the stay wire ring 33, and the stay wire control part 32 is embodied in a hole form, so that the stay wire is not easy to disorder, and the restraint force of the stay wire is better.

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

Example 3

The present embodiment provides an anti-reflux stent convenient to recycle, which is different from embodiment 2 in the structure of the connection member 1, particularly, the structure of the connection block 14.

As shown in fig. 8 and 9, in the present embodiment, the connection member 1 is provided with a pulling wire control hole 16, and specifically, the pulling wire control hole 16 is provided on the connection block 14 for passing a pulling wire therethrough to control the degree of relaxation of the connection member 1. In the operation process, when the anti-reflux support convenient to recover after the connecting piece 1 is released has abnormal conditions, the connecting piece is contracted through the corresponding stay wire of the stay wire control hole 16, and finally the anti-reflux support convenient to recover is recovered. The stay wire corresponding to the stay wire control hole 16 and the stay wire corresponding to the stay wire control part 32 are used simultaneously, so that the contraction effect of the anti-reflux support convenient to recover is improved, and meanwhile, the positions of the stay wire control hole 16 and the stay wire control part 32 are closer to each other, so that the contraction process is more stable.

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

It should be noted that, in this embodiment, the stay wire control hole 16 is additionally provided on the basis of embodiment 2, and in other embodiments, the stay wire control hole 16 is provided on the connecting member 1 on the basis of embodiment 1, which is also within the protection scope of the present invention.

In using this embodiment, the attachment block 14 is provided with a pull-wire control hole 16 to prevent the stent from being found to be unsuitable for implantation into the body when the stent is completely released from the delivery device, because it is undesirable to prematurely release the attachment block 14 from the delivery device, and it is difficult to retrieve the stent after releasing the attachment block 14.

Example 4

The present embodiment provides a stent against regurgitation which is easy to recycle, and differs from embodiment 1 in the structure of the V-shaped assistant part 31, specifically, the position and structure of the string controlling part 32.

As shown in fig. 10 to 12, the V-shaped auxiliary portion 31 further includes a wire pulling plate 34 disposed at the auxiliary portion distal end 313, and the wire pulling plate 34 extends from the auxiliary portion distal end 313 in a direction away from the first auxiliary arm; the wire pulling plate 34 is provided with two through holes 341 for the wire to pass through, and the two through holes 341 form the wire pulling control part 32. Fig. 12 illustrates the threading of the pull wire at two of the vias 341 so that the pull wire passes from the outside of the anti-reflux stent for easy retrieval through one of the vias 341 and out through the other of the vias 341. For convenience of description, the pull wire penetrating into the via 341 is referred to as a coming wire, and the pull wire penetrating out of the via 341 is referred to as a returning wire. The portions of the incoming and return wires remote from the tension plate 34 are on the outside of the anti-regurgitation stent for easy retrieval so as to be able to extend out against the inner wall of the valve delivery device. Specifically, the incoming and return wires are both outside the stent and the incoming and return wires are spread apart by the stent support so that when the incoming and return wires converge at the distal end of the delivery device, the incoming and return wires both extend against the distal opening of the delivery device, i.e., against the inner wall of the valve delivery device. Meanwhile, the incoming wire and the return wire are positioned on the outer side of the support, and the incoming wire and the return wire are close to each other under the stress state, so that the incoming wire and the return wire are not wound, and the pull wires are more orderly and do not interfere with each other.

Example 5

The present embodiment provides an anti-reflux stent which is easy to recycle, and is different from embodiment 4 in the structure of the connection member 1, specifically, the structure of the connection block 14.

As shown in fig. 13, in the present embodiment, two wire control holes 16 are provided on the connection member 1, and specifically, the wire control holes 16 are provided on the connection block 14 for passing a wire therethrough to control the degree of relaxation of the connection member 1. In the operation process, when the anti-regurgitation support convenient to retrieve after releasing connecting piece 1 appears abnormal conditions, act as go-between through acting as go-between that 16 control holes that act as go-between correspond makes connecting piece 1 shrink, finally will be convenient for the anti-regurgitation support of retrieving retrieve. The stay wire corresponding to the stay wire control hole 16 and the stay wire corresponding to the stay wire control part 32 are used simultaneously, so that the contraction effect of the anti-reflux support convenient to recover is improved, and meanwhile, the positions of the stay wire control hole 16 and the stay wire control part 32 are closer to each other, so that the contraction process is more stable.

The threading of the pull wire on the connecting block 14 can be the same as the threading of the pull wire at the two through holes 341 in embodiment 4, which is not described in detail here.

The rest of this embodiment is the same as embodiment 4, and the description thereof is omitted.

Example 6

This embodiment is an easily retrievable anti-reflux stent, which differs from embodiment 1 in the structure of the reinforcing mesh 8, specifically, the structural relationship of the second self-expanding arc 82 and the third self-expanding arc 83.

In the present embodiment, as shown in fig. 14 and 15, 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 retrieval, with the two being connected at an intermediate position; the second self-expanding arc 82 is connected at both ends thereof to the fastener 4 and the first self-expanding arc 81, respectively, and the third self-expanding arc 83 is connected at both ends thereof to the other fastener 4 and the first self-expanding arc 81, respectively.

Example 7

This embodiment is an easily retrievable anti-reflux stent, which differs from embodiment 2 in the structure of the reinforcing mesh 8, specifically in the structural relationship of the second self-expanding arcs 82 and the third self-expanding arcs 83.

In the present embodiment, as shown in fig. 16 and 17, 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 retrieval, with the two being connected at an intermediate position; the second self-expanding arc 82 is connected at both ends thereof to the fastener 4 and the first self-expanding arc 81, respectively, and the third self-expanding arc 83 is connected at both ends thereof to the other fastener 4 and the first self-expanding arc 81, respectively.

Example 8

This embodiment is an easily retrievable anti-reflux stent, which differs from embodiment 3 in the structure of the reinforcing mesh 8, specifically in the structural relationship of the second self-expanding arcs 82 and the third self-expanding arcs 83.

In the present embodiment, as shown in fig. 18 and 19, 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 retrieval, and are connected at an intermediate position; the second self-expanding arc 82 is connected at both ends thereof to the fastener 4 and the first self-expanding arc 81, respectively, and the third self-expanding arc 83 is connected at both ends thereof to the other fastener 4 and the first self-expanding arc 81, respectively.

The rest of this embodiment is the same as embodiment 3, and the description thereof is omitted.

Example 9

This embodiment is an easily retrievable anti-reflux stent, which differs from embodiment 4 in the structure of the reinforcing mesh 8, specifically, the structural relationship of the second self-expanding arcs 82 and the third self-expanding arcs 83.

In the present embodiment, as shown in fig. 20 and 21, 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 retrieval, with the two being connected at an intermediate position; the two ends of the second self-expanding arc 82 are respectively connected with the fastener 4 and the first self-expanding arc 81, and the two ends of the third self-expanding arc 83 are respectively connected with the other fastener 4 and the first self-expanding arc 81.

The rest of this embodiment is the same as embodiment 4, and details are not repeated here.

Example 10

This embodiment is an easily retrievable anti-reflux stent, which differs from embodiment 5 in the structure of the reinforcing mesh 8, specifically in the structural relationship of the second self-expanding arcs 82 and the third self-expanding arcs 83.

In the present embodiment, as shown in fig. 22 and 23, 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 retrieval, with the two being connected at an intermediate position; the two ends of the second self-expanding arc 82 are respectively connected with the fastener 4 and the first self-expanding arc 81, and the two ends of the third self-expanding arc 83 are respectively connected with the other fastener 4 and the first self-expanding arc 81.

The rest of this embodiment is the same as embodiment 5, and the description thereof is omitted.

Example 11

This embodiment is a stent for preventing regurgitation which facilitates recovery, and differs from embodiment 1 in the structure of the reinforcing mesh 8, particularly in the structural relationship of the second self-expanding arc 82 and the third self-expanding arc 83.

As shown in fig. 24 and 25, in this embodiment, 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 retrieval at an intermediate position near but not connected to each other; the two ends of the second self-expanding arc 82 are respectively connected with the fastener 4 and the first self-expanding arc 81, and the two ends of the third self-expanding arc 83 are respectively connected with the other fastener 4 and the first self-expanding arc 81.

Example 12

As shown in fig. 26 and 27, in this embodiment, 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 retrieval at an intermediate position near but not connected to each other; the two ends of the second self-expanding arc 82 are respectively connected with the fastener 4 and the first self-expanding arc 81, and the two ends of the third self-expanding arc 83 are respectively connected with the other fastener 4 and the first self-expanding arc 81.

Example 13

In this embodiment, as shown in fig. 28 and 29, 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 retrieval, with the two being close to but unconnected at an intermediate position; the second self-expanding arc 82 is connected at both ends thereof to the fastener 4 and the first self-expanding arc 81, respectively, and the third self-expanding arc 83 is connected at both ends thereof to the other fastener 4 and the first self-expanding arc 81, respectively.

Example 14

As shown in fig. 30 and 31, in this embodiment, 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 retrieval, with the two being close to but unconnected at an intermediate position; the two ends of the second self-expanding arc 82 are respectively connected with the fastener 4 and the first self-expanding arc 81, and the two ends of the third self-expanding arc 83 are respectively connected with the other fastener 4 and the first self-expanding arc 81.

Example 15

This embodiment is a stent for preventing regurgitation which facilitates the recovery, and differs from embodiment 5 in the structure of the reinforcing mesh 8, specifically, the structural relationship of the second self-expanding arcs 82 and the third self-expanding arcs.

In this embodiment, as shown in fig. 32 and 33, 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 retrieval, with the two being close to but unconnected at an intermediate position; the second self-expanding arc 82 is connected at both ends thereof to the fastener 4 and the first self-expanding arc 81, respectively, and the third self-expanding arc 83 is connected at both ends thereof to the other fastener 4 and the first self-expanding arc 81, respectively.

Example 16

The embodiment of the utility model also provides a prosthetic valve device, the prosthetic valve device includes the anti-regurgitation support that is convenient for retrieve that any one of the above-mentioned embodiments provided, the regurgitation support forms the installation passageway, the prosthetic valve device still includes tectorial membrane, artificial valve leaf and leak protection shirt rim, the tectorial membrane is fixed on fastener 4, the tectorial membrane is set up around a week from the inboard of the anti-regurgitation support that is convenient for retrieve, be used for preventing blood from taking place the side leakage through the fretwork position of the anti-regurgitation support that is convenient for retrieve; 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 use gasket and palirrhea support extrusion each other come the mode of fixing artificial valve leaflet relatively, the additional spare part of anti palirrhea support of being convenient for to retrieve has first been reduced, and the gasket has not been had, also be favorable to the anti palirrhea support's of being convenient for to retrieve further compression, 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-proof skirt edge is arranged at the proximal end of the clamping end 5 and used for preventing the anti-reflux support frame convenient to recycle from side leakage.

In this application, the support main part integrated into one piece, in other words, connecting piece 1, setting element 2, auxiliary member 3, fastener 4 and screens end 5 integrated into one piece, add the man-hour, can carve out on nickel titanium alloy pipe, the support main part is carved out the back and is equivalent to the contraction state, and further processing can obtain the form of extension state.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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

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

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

the auxiliary piece is arranged on at least one positioning piece, and at least two V-shaped auxiliary parts with openings facing to the proximal end of the anti-reflux support convenient to recover are formed between two end parts of the auxiliary piece; the outer surface of the V-shaped auxiliary part is used for being attached to the inner wall of a blood vessel; the distal end of V type auxiliary portion forms the control division of acting as go-between, supplies to act as go-between to pass, in order to control the diastole degree of auxiliary member on the anti regurgitation support's of being convenient for retrieve axial, under the contraction state the top surface of V type auxiliary portion is not less than the top surface of setting element connecting portion.

2. The easy-to-retrieve anti-reflux stent of claim 1, wherein the top surface of the V-shaped assistant portion in the contracted state is not lower than the top surface of the connecting member.

3. The easily retrievable anti-reflux stent of claim 1, wherein the V-shaped auxiliary portion comprises a first auxiliary arm, a second auxiliary arm, and an auxiliary portion distal end, the first auxiliary arm and the second auxiliary arm being connected by the auxiliary portion distal end to form a V-shaped structure.

4. The retrieval-facilitating anti-reflux stent of claim 3, wherein the distal end of the first auxiliary arm is curved toward the direction of its corresponding second auxiliary arm when the retrieval-facilitating anti-reflux stent is in the expanded state; the distal end of the second auxiliary arm is bent towards the direction of the corresponding first auxiliary arm;

and/or the presence of a gas in the gas,

when the anti-reflux stent convenient to recover is in an unfolded state, the proximal end of the first auxiliary arm is bent towards a direction far away from the corresponding second auxiliary arm; the proximal end of the second auxiliary arm is bent away from the corresponding first auxiliary arm.

5. The anti-reflux stent easy to retrieve as defined in claim 1, wherein said positioning member comprises a first positioning arm, a second positioning arm and a positioning member proximal end, said first positioning arm and said second positioning arm being connected by said positioning member proximal end; the two ends of the auxiliary piece are respectively connected with the first positioning arm and the second positioning arm;

6. The retrieval-facilitating anti-reflux stent of claim 1, further comprising a securing member and a marker member, wherein the marker member is radiopaque, wherein the proximal end of the securing member is attached to the positioning member, and wherein the marker member is correspondingly attached to the securing member.

7. The easy-to-recycle anti-reflux bracket as claimed in claim 6, wherein the fixing member comprises a fixing plate and a limiting part, two 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 out of the surface of the fixing plate, and the marking member is at least partially located on the fixing plate;

the fixing member convenient for recovery gradually approaches to the axis of the anti-reflux stent convenient for recovery from the proximal end to the distal end thereof;

the fixing piece is provided with a stay wire through hole, and the stay wire passes through the stay wire through hole so as to control the opening angle of the positioning piece relative to the axis of the anti-reflux bracket convenient to recover;

8. The easily retrievable anti-reflux stent of claim 6, wherein the marker is C-shaped and is disposed therethrough from the proximal end to the distal end thereof, the marker being disposed between the proximal end and the distal end of the anchor member;

9. The anti-reflux stent for facilitating retrieval of claim 1, wherein the fastener comprises 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, the first fastening arm and the second fastening arm connecting two adjacent connectors, respectively.

10. The anti-reflux stent that facilitates retrieval of claim 1,

a pull wire control hole is formed in the far end of the connecting part;

the width of the web plate is smaller than that of the connecting block;

the stay wire control hole is positioned on the connecting block.

11. The retrieval-ready anti-reflux stent of claim 1, further comprising a capture end disposed at the proximal end of the fastener, the retrieval-ready anti-reflux stent anchored in an installation environment by the capture end;

when the anti-reflux stent convenient to retrieve is in an extended state: the clamping end extends from the far end to the near end to the direction away from the axis gradually, and the outward expansion angle of the clamping end relative to the axis is between 6 and 14 degrees;

when the anti-reflux stent convenient to recover is in an extended state: the far end of the first connecting rod and the far end of the fourth connecting rod are respectively bent towards the direction close to the opposite side, and the near end of the second connecting rod and the near end of the third connecting rod are respectively bent towards the direction close to the opposite side;

when the anti-reflux stent convenient to retrieve is in an extended state: the proximal end of the first connecting rod and the proximal end of the fourth connecting rod are respectively bent towards the direction far away from the other side, and the distal end of the second connecting rod and the distal end of the third connecting rod are respectively bent towards the direction far away from the other side.

12. The anti-reflux stent that facilitates retrieval of claim 1,

the anti-reflux bracket convenient to recover further comprises a clamping end arranged at the proximal end of the fastener, and the anti-reflux bracket convenient to recover is anchored in an installation environment through the clamping end;

13. The anti-reflux stent facilitating retrieval of any one of claims 2-12, wherein the curved position of the distal end of the auxiliary portion forms the pull line control portion.

14. The easy-to-retrieve anti-reflux stent of any one of claims 2-12, wherein the V-shaped assist portion further comprises a pull wire loop disposed at a distal end of the assist portion, the pull wire loop extending from the distal end of the assist portion in a direction away from the first assist arm; the central hole of the stay wire ring forms a stay wire control part.

15. The easy-to-retrieve anti-reflux stent of any one of claims 2-12, wherein the V-shaped auxiliary portion further comprises a pull tab disposed at a distal end of the auxiliary portion, the pull tab extending from the distal end of the auxiliary portion in a direction away from the first auxiliary arm; the pull wire plate is provided with two through holes for the pull wires to pass through, and the two through holes form the pull wire control part.

16. A readily recoverable anti-reflux stent as claimed in any one of claims 1 to 12, wherein:

the number of the connecting pieces is three;

each positioning piece is provided with one auxiliary piece;

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

the connecting piece, the locating piece, the fastening piece and the auxiliary piece are integrally formed.

17. A prosthetic valve device, comprising:

the easy-to-retrieve anti-reflux scaffold of any one of claims 1-15, the reflux scaffold forming an installation channel;

the covering film is fixed on the fastener;

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

the leak protection shirt rim is located the screens end is used for preventing the anti palirrhea support edge leakage of being convenient for retrieve is last.