CN210250166U

CN210250166U - Surgical valve and implantation device thereof

Info

Publication number: CN210250166U
Application number: CN201920348743.6U
Authority: CN
Inventors: 杨军
Original assignee: Shanghai Cingular Biotech Corp
Current assignee: Shanghai Cingular Biotech Corp
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2020-04-07
Anticipated expiration: 2029-03-19

Abstract

The utility model discloses a surgical valve and implantation device thereof belongs to medical instrument technical field, surgical valve includes valve body and expandable support, the valve body includes the valve seat and sets up the valve frame on the valve seat, expandable support has the netted tubular structure that the opening just was made by the metal for both ends, an pot head is located on the valve body, and be provided with a plurality of inserting hooks that can insert the autologous valve ring along its circumference in this end, be provided with the barb structure on the inserting hook, the other end is configured to can be radially strutted and support in autologous valve ring one side. The utility model discloses set up the inserted hook in expandable support one end, the other end can be radially propped open and support in autologous valve ring one side, makes the valve body fix in autologous valve ring position from the both sides of autologous valve ring respectively, compares with prior art, has saved the process of sewing up the operation valve in autologous valve ring position, has shortened the operation time, has reduced operation risk, has reduced the risk that the valve body takes place internal droing at the postoperative moreover.

Description

Surgical valve and implantation device thereof

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an operation valve and implantation device thereof.

Background

Surgical valves are common medical devices used for treating heart valve diseases, and are mainly used for replacing autologous valves which are seriously diseased and cannot be repaired. Surgical valves include both mechanical and biological valves, and are selected according to the physical condition and the needs of the patient. Compared with the intervention valves which are popular in recent years, the surgical valve has wider application range, lower application requirement on patients, longer service life of the product and more economic surgical cost, thereby stably occupying the market of heart valve disease treatment products.

Surgical valves require replacement of the native diseased valve by surgical procedures, which typically involve opening the chest with the aid of instruments, exposing the heart valve, removing the lesion, and then suturing the valve to the native annulus to secure it. However, the suturing process is complicated, the operation time is long, and the operation risk is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a surgical valve and implant device thereof to solve the surgical valve that exists among the prior art need sew up and the surgical valve that exists is damaged the risk that became invalid and the longer problem of operating time, makes the operation process more simple and convenient, makes the valve body combine more closely with autologous valve ring simultaneously, reduces the risk that the postoperative takes place to drop in vivo.

As the conception, the utility model adopts the technical proposal that:

the utility model provides a surgical valve, includes the valve body, the valve body include the valve seat with set up in the valve frame on the valve seat, still include expandable support, expandable support has the mesh tubular structure that the opening just was made by the metal for both ends, an expandable support pot head is located on the valve seat, just expandable support is in one end is provided with a plurality of plug hooks that can insert autologous valve ring along its circumference, be provided with the barb structure on the plug hook, the expandable support other end is configured to can be radially propped open and support autologous valve ring one side.

In order to achieve the above object, the present invention further provides an implantation device for surgical valve, comprising a fixing member and an expansion structure, wherein the fixing member is detachably disposed on the valve body, the expansion structure passes through the valve body located in the expandable stent, and the other end of the expandable stent is radially expanded to a preset position.

Furthermore, the expansion structure comprises a medium catheter and an expansion balloon, the medium catheter is arranged in the fixing piece in a penetrating mode, two ends of the medium catheter penetrate out of the fixing piece, one end of the medium catheter is communicated with the expansion balloon, and a medium can be introduced into the expansion balloon to enable the expansion balloon to expand outwards.

Further, the expanding structure is including pushing away drawing piece and expansion assembly, push away to draw the piece to wear to locate in the mounting, just the both ends that push away the drawing piece are all worn out the mounting, expansion assembly one end connect in push away the one end that draws the piece, the other end connect in the mounting, expansion assembly can push away to draw the drive of piece down along radially outwards expand and the inwards shrink of expandable support.

Furthermore, the expansion assembly comprises a plurality of telescopic arms arranged along the circumferential direction of the push-pull piece, one end of each telescopic arm is connected to one end of the push-pull piece, and the other end of each telescopic arm is connected to the fixing piece.

Furthermore, flexible arm is including the first arm and the second arm of rotation connection, the first arm is kept away from the one end rotation of second arm connect in push-and-pull spare, the second arm is kept away from the one end rotation of first arm connect in the mounting.

Further, the implantation device further comprises a valve holder, the valve holder is arranged on the fixing piece, and the valve holder is detachably connected to the valve body.

Further, the valve holding device comprises an interface and a supporting arm, the interface is sleeved on the fixing piece, one end of the supporting arm is connected to the interface, and the other end of the supporting arm is detachably connected to the valve body.

Furthermore, the push-pull piece is a stepped shaft which is provided with a first stepped surface along the circumferential direction, the fixing piece is provided with a stepped hole along the axial direction, the stepped hole is provided with a second stepped surface along the circumferential direction, and the first stepped surface and the second stepped surface are matched to limit the push-pull piece.

The utility model has the advantages that:

the utility model provides a surgical valve, through setting up the expandable support, the inserted hook that one end of expandable support set up can insert the autologous valve ring, fix the valve body on the autologous valve ring position from one side of autologous valve ring, the other end that expandable support kept away from the valve body can be radially strutted and supported at autologous valve ring opposite side afterwards, fix the valve body on the autologous valve ring position from the opposite side of autologous valve ring, can expand the support and firmly fix the surgical valve on autologous valve ring position from both sides respectively, compared with the prior art, firstly, the process that the surgical valve is sewed up in autologous valve ring position has been saved, can avoid sewing up the damage to the surgical valve in-process, shorten the operation time, reduce the risk of operation; and secondly, the valve body is fixed from two sides, so that the valve body can be better fixed at the position of the autologous valve ring, and the risk of falling off in vivo after operation is reduced.

The utility model provides an implant device can send the position of above-mentioned operation valve to autologous valve ring through this implant device, makes the operation more simple and convenient, practices thrift operating time, reduces the operation risk.

Drawings

Fig. 1 is a schematic structural view of a surgical valve provided by the present invention;

fig. 2 is a schematic structural diagram (working state) of the surgical valve provided by the present invention;

fig. 3 is a schematic structural view of a valve body provided by the present invention;

fig. 4 is a schematic structural view of an implantation device provided by the present invention;

fig. 5 is a first schematic view illustrating an operating state of the implant device according to the present invention;

fig. 6 is a schematic view illustrating a second working state of the implant device according to the present invention;

fig. 7 is a partial cross-sectional view of a push-pull member and a securing member provided by the present invention;

fig. 8 is a partial enlarged view at a in fig. 7.

In the figure:

1. a valve body; 11. a flap seat; 12. a flap frame; 121. a support frame; 122. a leaflet; 2. an expandable stent; 21. inserting a hook; 3. a fixing member; 301. a first hole; 302. a second step surface; 31. a valve holder; 311. an interface; 312. a support arm; 4. a push-pull member; 401. a first step surface; 41. a first part; 42. a second section; 5. an expansion assembly; 51. a telescopic arm; 511. a first arm; 512. a second arm.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Fig. 1 is a schematic structural diagram of a surgical valve provided in this embodiment; fig. 2 is a schematic structural diagram (working state) of the surgical valve provided in this embodiment; fig. 3 is a schematic structural diagram of the valve body provided in this embodiment. As shown in fig. 1 and 2, the present embodiment provides a surgical valve including a valve body 1 and an expandable stent 2. As shown in fig. 3, the valve body 1 includes a valve seat 11 and a valve frame 12, the valve frame 12 includes a support frame 121, three valve leaflets 122 are mounted on the support frame 121, the three valve leaflets 122 can be opened or closed at the same time, and when the three valve leaflets 122 are opened at the same time, a channel is formed to allow blood to pass through; when the three leaflets 122 close together, blood flow is blocked. The valve body 1 is the main structure of the prior art surgical valve and is not described in detail herein.

The expandable stent 2 is a mesh-shaped cylindrical structure with openings at two ends and made of metal, one end is sleeved on the valve seat 11, and the expandable stent 2 is provided with a plurality of inserting hooks 21 (as shown in fig. 1) capable of being inserted into the autologous valve annulus at the end along the circumferential direction thereof, and the number of the inserting hooks 21 is not particularly limited and can be set according to specific conditions. The other end of the expandable stent 2 can be radially expanded to support at one side of the autologous valve annulus under the action of external force, in the embodiment, the diameter of the middle part of the expandable stent 2 is fixed, the diameter of the middle part is less than or equal to the diameter of the two end parts, namely the middle part is not expandable and not contractible, the two end parts of the expandable stent 2 can be radially expanded, and the expandable stent 2 has certain elasticity and expansibility, so that the expandable stent 2 can be conveniently installed on the valve seat 11, and one end of the expandable stent 2 far away from the valve seat 11 can be supported at one side of the autologous valve annulus.

Specifically, in the present embodiment, the expandable stent 2 is made of a non-memory metal (such as stainless steel or cobalt-chromium alloy), which can enhance the strength and stability of the expandable stent 2, and ensure that one end of the expandable stent 2 away from the valve body 1 can be kept in a stretched state after being radially stretched, so as to cooperate with the insertion hooks 21 to fix the valve body 1 at the native valve annulus position, and the mesh structure is externally covered with a fabric or a biological tissue material with good biocompatibility, such as dacron fabric, a composite fabric with dacron, pericardial tissue of cattle, pigs or other animals, and the like. Specifically, the mesh structure includes a plurality of vertical lines arranged in a cylindrical structure and transverse lines disposed between the adjacent vertical lines, and in this embodiment, the transverse lines are arc lines in order to facilitate the expansion of the expandable stent 2. The insertion hook 21 and the expandable stent 2 are of an integral structure, which is formed by extending and bending vertical lines constituting a net structure, the end of the insertion hook 21 is designed to be a conical structure, and in order to improve the fixing effect of the insertion hook 21, the insertion hook 21 is further provided with a barb structure, such as a barb, a barb and the like, so that the insertion hook 21 can be inserted into a native valve ring to fix the valve body 1, of course, in other embodiments, the insertion hook 21 and the expandable stent 21 can be separately arranged, and the insertion hook 21 is fixed on the expandable stent 2 by welding and the like.

However, the present embodiment is not limited to this, and the expandable stent 2 may also be a self-expandable structure, where the expandable stent 2 is made of a memory metal (such as nitinol) and is constrained and fixed in a cylindrical shape having a diameter not smaller than that of the valve body 1, and when the expandable stent is delivered to the native valve annulus, the expandable stent self-expands after releasing the external fixation, and the self-expanded diameter is slightly larger than the opening diameter in the middle of the native valve annulus, so that the valve body 1 is fixed at the native valve annulus.

The plurality of insertion hooks 21 cooperate with an end of the expandable stent 2 remote from the valve body 1 to secure the valve body 1 in a native annulus position. Specifically, when the surgical valve is fixed, the inserting hook 21 can be inserted into the native valve annulus, and then one end of the expandable stent 2, which is far away from the valve body 1, is spread to be supported on one side of the native valve annulus (as shown in fig. 2), and the valve body 1 is fixed at the position of the native valve annulus from two sides of the native valve annulus respectively.

The present embodiments also provide an implantation device for a surgical valve. Fig. 4 is a schematic structural diagram of an implantation device of a surgical valve provided in this embodiment; fig. 5 is a first schematic view illustrating an operating state of the implantation device according to the present embodiment; fig. 5 is a schematic view illustrating a second working state of the implantation device according to the present embodiment. As shown in fig. 4 to 6, the implantation device of the surgical valve provided in this embodiment is detachably inserted into the channel formed when the three leaflets 122 are simultaneously opened, and the implantation device can radially expand the other end of the expandable stent 2 to a predetermined position, where the predetermined position is that the other end of the expandable stent 2 is just supported on the other side of the native valve annulus.

Specifically, the implant device includes a fixing member 3 and an expanded structure. The fixing member 3 is inserted into a hole formed when the three valve leaflets 122 of the surgical valve are relatively opened, and the valve body 1 is detachably connected to the fixing member 3, in this embodiment, the fixing member 3 is a cylindrical structure with openings at both ends, but in other embodiments, the fixing member 3 may also be a square cylindrical structure. The expanding structure passes through a channel which is formed when the three valve leaflets 122 are simultaneously expanded and is positioned in the expandable stent 2, and can expand one end of the expandable stent 2 far away from the valve body 1 to a preset position along the radial direction of the expandable stent.

Specifically, in this embodiment, the above-mentioned expansion structure includes push-pull piece 4 and expansion assembly 5, above-mentioned push-pull piece 4 wears to locate in mounting 3, and the both ends of push-pull piece 4 all wear out mounting 3, in this embodiment, push-pull piece 4 is the cylindric structure with above-mentioned mounting 3 matched with, can guarantee to push-pull piece 4 at the 3 push-and-pull in-process of relative mounting, push-pull piece 4 can follow the axial steady motion of mounting 3, avoid push-pull piece 4 to produce in the push-and-pull in-process and rock, of course in other embodiments, push-pull piece 4 can also be square post, mounting 3 is square tubular structure this moment. One end of the expansion component 5 is connected to one end of the push-pull part 4, and the other end is connected to the fixing part 3, and the expansion component can be driven by the push-pull part 4 to expand outwards along the radial direction of the expandable stent 2, so that the end, away from the valve body 1, of the expandable stent 2 is expanded along the radial direction. But also the expansion component 5 can be driven by the push-pull component 4 to contract inwards along the radial direction of the expandable stent 2.

The expansion assembly 5 comprises a plurality of telescopic arms 51 arranged along the circumferential direction of the push-pull member 4, one end of each telescopic arm 51 is connected with one end of the push-pull member 4, and the other end of each telescopic arm 51 is connected with the fixing member 3. Specifically, in the present embodiment, the telescopic arm 51 includes a first arm 511 and a second arm 512 which are rotatably connected, an end of the first arm 511 away from the second arm 512 is connected to the push-pull member 4, an end of the second arm 512 away from the first arm 511 is connected to the fixed member 3, and an included angle between an extending direction of the first arm 511 and an extending direction of the second arm 512 and an axial direction of the push-pull member 4 is an acute angle. When the valve body 1 is detachably fixed on the fixing piece 3, one end of the expandable stent 2, which is far away from the valve body 1, is located outside the joint of the first arm 511 and the second arm 512, when one end of the push-pull piece 4, which is far away from the expansion assembly 5, moves in the direction far away from the fixing piece 3, the telescopic arm 51 of the expansion assembly 5 contracts, the included angle between the first arm 511 and the second arm 512 gradually decreases, the distance from the joint of the first arm 511 and the second arm 512 to the axis of the push-pull piece 4 continuously increases, that is, the expansion assembly 5 expands outwards in the radial direction of the expandable stent 2, so that one end of the expandable stent 2, which is far away from the valve body 1, can be radially expanded, and one end of the expandable stent 2, which is far away from the valve body 1, can be supported on one side. Of course, in other embodiments, the number of the telescopic arms 51 may be three or more as long as the expandable stent 2 can be expanded.

However, the present embodiment is not limited to this, and the expandable structure may further include a medium conduit and an inflation balloon, the medium conduit is inserted into the fixing member 3, specifically, the medium conduit includes an inner tube and an outer tube, the inner tube is inserted into the outer tube and has a gap with the outer tube, the inflation balloon is inserted into the inner tube, one end of the inflation balloon is connected to the outer tube, and the other end of the inflation balloon is connected to the inner tube in a sealing manner. The opening of the outer tube at the end far away from the expansion balloon is a step opening, and a spring is arranged between the end of the inner tube far away from the expansion balloon and the step opening of the outer tube. A medium (gas or normal saline) can be introduced into the expansion balloon through the gap between the outer tube and the inner tube so as to expand the expansion balloon, so that one end of the expandable stent 2, which is far away from the valve body 1, is radially expanded. And in the process of inflating the balloon, the axial length of the inflatable balloon in the extending direction of the inner tube is reduced, and meanwhile, the spring is compressed until the inflatable balloon supports one end, away from the valve body 1, of the expandable stent 2 to a preset position along the radial direction of the expandable stent. After the medium in the inflatable balloon is pumped out, the inflatable balloon is restored to the initial state.

As shown in fig. 4 to 6, the implantation device further includes a valve holder 31, the valve holder 31 is detachably disposed on the fixing member 3, and the valve body 1 is detachably connected to the valve holder 31. Specifically, the valve holder 31 includes an interface 311 and three support arms 312, the interface 311 is a circular ring structure and can be sleeved on the fixing element 3, one end of each support arm 312 is connected to the interface 311, the other end of each support arm 312 is connected to the valve frame 12, and the support arms 312 extend in the direction close to the expansion assembly 5 in the axial direction of the fixing element 3. Of course, in other embodiments, four or more support arms 312 may be provided to improve the stable fixation of the valve body 1. In addition, the support frame 121 is fixed on the support arm 312 by sewing, specifically, the support frame 12 is provided with a dacron fabric, the support frame 121 is fixed on the support arm 312 by sewing through the dacron fabric, so that the support arm 312 and the valve body 1 are separated after the valve body 1 is fixed at the self-body valve ring position.

Further, fig. 7 is a partial sectional view of the fixed member and the push-pull member in the present embodiment; fig. 8 is a partial enlarged view of a portion a in fig. 7. In order to ensure that the expansion assembly 5 can radially expand the end, away from the valve body 1, of the expandable stent 2 to a preset position under the driving of the push-pull piece 4, the fixing piece 3 can limit the movement of the push-pull piece 4, and the push-pull piece 4 is prevented from moving out of place or moving too long. Specifically, in the present embodiment, a stepped hole is provided in the fixing member 3 along the axial direction thereof, and includes a first hole 301 and a second hole, wherein the diameter of the first hole 301 is larger than that of the second hole, a second stepped surface 302 is formed between the first hole 301 and the second hole, and the first hole 301 is closer to the expansion member 5 than the second hole. The push-pull member 4 is a stepped shaft, and includes a first portion 41 and a second portion 42, wherein the cross-sectional area (or diameter) of the first portion 41 is greater than the cross-sectional area (or diameter) of the second portion 42, a first stepped surface 401 is formed between the first portion 41 and the second portion 42, the first portion 41 corresponds to the first hole 301, the second portion 42 corresponds to the second hole, and the joint of the first portion 41 and the second portion 42 is located in the first hole 301, one end of the first portion 41, which is far away from the second portion 42, penetrates through the first hole 301 and is connected to the expansion assembly 5, and one end of the second portion 42, which is far away from the first portion 41, penetrates through the second hole, so that the medical staff can perform corresponding operations on the push-pull member 4. During the movement of the second portion 42 away from the fixed member 3, after the first step surface 401 and the second step surface 302 contact, the push-pull member 4 stops moving, and the expansion component 5 radially expands the end of the expandable stent 2 away from the valve body 1 to a preset position.

Of course, in other embodiments, the limiting manner may also be: the part of the push-pull piece 4, which penetrates out of the fixing piece 3 and is connected with the expansion assembly 5, is provided with a limiting piece, and the limiting piece is a structure sleeved on the push-pull piece 4 or a structure fixed on the outer surface of the push-pull piece 4. In the process that one end of the push-pull piece 4, which is far away from the expansion assembly 5, moves towards the direction far away from the fixing piece 3, when the limiting piece is in contact with the fixing piece 3, the push-pull piece 4 can be prevented from continuously moving, and at the moment, one end, which is far away from the valve body 1, of the expandable stent 2 is radially expanded to a preset position by the expansion assembly 5, so that one end, which is far away from the valve body 1, of the expandable stent 2 can be supported on one side of the autologous valve.

The operation of the implant device will be described in detail below.

Firstly, the valve body 1 is fixed on the supporting arm 312 of the valve holder 31 by sewing with suture, and then the valve holder 31 is connected to the fixing member 3 by passing the expansion assembly 5, the push-pull member 4 and the fixing member 3 through the hole passages formed when the three-piece valve leaflet 122 is opened and the interface 311 of the valve holder 31. At this time, the end of the expandable stent 2 away from the valve body 1 is located outside the expansion assembly 5, and each telescopic arm 51 is in an extended state, as shown in fig. 5.

Subsequently, the valve body 1 is sent to the position of the native valve annulus through the implantation device, and the plug hooks 21 at one end of the expandable stent 2 penetrate into the native valve annulus, so as to perform the primary fixation of the valve body 1. When the push-pull member 4 is moved away from the end of the expansion member 5 to the direction away from the fixing member 3, the telescopic arms 51 of the expansion member 5 contract, and the joint of the first arms 511 and the second arms 512 moves away from the axis of the push-pull member 4, that is, the expansion member 5 expands outward in the radial direction of the expandable stent 2, so as to expand the end of the expandable stent 2 away from the valve body 1 to a preset position in the radial direction, so that the end of the expandable stent 2 away from the valve body 1 can be supported on the native valve annulus side, and the expansion member 5 is kept in this state, as shown in fig. 6.

Finally, after a preset time, by moving the end of the push-pull member 4 away from the expansion assembly 5 to the direction close to the fixing member 3, the telescopic arm 51 of the expansion assembly 5 is extended, the joint of the first arm 511 and the second arm 512 moves to the direction close to the axis of the push-pull member 4 until returning to the initial position, that is, the expansion assembly 5 contracts inwards along the radial direction of the expandable stent 2, and then the suture between the support arm 312 and the valve body 1 is cut off, and the whole implant device is taken out from the opening hole formed by the opening of the three leaflets 122.

In summary, the implantation device provided in this embodiment, the valve body 1 is delivered to the position of the native valve annulus through the implantation device, the insertion hook 21 is inserted into the native valve annulus, and one end of the expandable stent 2, which is away from the valve body 1, is radially expanded to be supported at one side of the native valve annulus, so as to fix the valve body 1 at the position of the native valve annulus from two sides of the native valve annulus respectively.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a surgical valve, includes valve body (1), valve body (1) including valve seat (11) with set up in valve frame (12) on valve seat (11), its characterized in that still includes expandable support (2), expandable support (2) have the opening and the netted tubular structure of being made by the metal for both ends, expandable support (2) pot head is located on valve seat (11), just expandable support (2) be in one end is provided with a plurality of inserting hooks (21) that can insert autologous valve ring along circumference, be provided with barb structure on inserting hooks (21), expandable support (2) other end is configured to can radially be propped open and support autologous valve ring one side.

2. An implanting device of a surgical valve according to claim 1, characterized by comprising a fixing member (3) and an expanding structure, wherein the fixing member (3) is detachably arranged in the valve body (1) in a penetrating way, and the expanding structure passes through the valve body (1) and is positioned in the expandable stent (2) and can radially expand the other end of the expandable stent (2) to a preset position.

3. The implant device according to claim 2, wherein the expansion structure comprises a medium conduit and an expansion balloon, the medium conduit is arranged in the fixing member (3) in a penetrating manner, two ends of the medium conduit both penetrate out of the fixing member (3), one end of the medium conduit is communicated with the expansion balloon, and a medium can be introduced into the expansion balloon to expand the expansion balloon outwards.

4. The implant device according to claim 3, wherein the expansion structure comprises a push-pull member (4) and an expansion assembly (5), the push-pull member (4) is arranged in the fixing member (3) in a penetrating manner, both ends of the push-pull member (4) penetrate out of the fixing member (3), one end of the expansion assembly (5) is connected to one end of the push-pull member (4), the other end of the expansion assembly is connected to the fixing member (3), and the expansion assembly (5) can be driven by the push-pull member (4) to expand outwards and contract inwards along the radial direction of the expandable stent (2).

5. The implant device according to claim 4, characterized in that the expansion assembly (5) comprises a plurality of telescopic arms (51) arranged along the circumference of the push-pull member (4), one end of the telescopic arms (51) being connected to one end of the push-pull member (4) and the other end being connected to the fixing member (3).

6. The implant device according to claim 5, characterized in that said telescopic arm (51) comprises a first arm (511) and a second arm (512) rotatably connected, the end of said first arm (511) remote from said second arm (512) being rotatably connected to said push-pull member (4), the end of said second arm (512) remote from said first arm (511) being rotatably connected to said fixation member (3).

7. The implant device according to claim 2, characterized in that it further comprises a valve holder (31), said valve holder (31) being arranged on said fixation member (3), and said valve holder (31) being detachably connected to said valve body (1).

8. The implant device according to claim 7, wherein the valve holder (31) comprises an interface (311) and a support arm (312), the interface (311) is sleeved on the fixing member (3), one end of the support arm (312) is connected to the interface (311), and the other end is detachably connected to the valve body (1).

9. The implant device according to claim 4, characterized in that the push-pull member (4) is a stepped shaft having a first step surface (401) arranged along a circumferential direction, the fixing member (3) has a stepped hole arranged along an axial direction, the stepped hole has a second step surface (302) arranged along a circumferential direction, and the first step surface (401) and the second step surface (302) cooperate to limit the push-pull member (4).