Valve stent and prosthetic heart valve

Abstract

The present application relates to the technical field of medical devices, in particular to a valve stent and an artificial heart valve prosthesis; comprising a positioning air bag and a valve stent, the positioning air bag is installed inside the valve stent, a clamping valve is installed in the valve stent, the clamping valve array is in the valve stent, a locking valve is arranged on the positioning air bag, a locking through hole is formed on the locking valve, the locking through hole is installed on the clamping valve, the positioning air bag makes the locking valve drive the clamping valve to contract through contraction, and then the valve stent is contracted, so as to be repositioned; a sealing air bag is further arranged outside the valve stent, the sealing air bag is used for completely sealing the valve stent to cover the perivalvular leakage and the regurgitation area, and then the perivalvular leakage and the regurgitation are prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a valve stent and an artificial heart valve prosthesis. BACKGROUND

[0002] A valve stent is a medical device used for the treatment of heart valve diseases. It is usually made of metal or plastic materials and designed in a stent shape, which can support and maintain the open state of the heart valve to improve blood flow. Valve stents are commonly used for the treatment of aortic valve stenosis or insufficiency. By minimally invasive surgery, the stent is implanted into the heart to replace or repair the damaged valve. This treatment method is called transcatheter aortic valve replacement (TAVR), which is a relatively new treatment technology. Compared with traditional open chest surgery, it has the advantages of less trauma and faster recovery.

[0003] However, the existing valve stent has the problem of inaccurate fixation position or insufficient sealing with the tissue around the heart, which may cause paravalvular leakage or regurgitation, which can greatly harm the patient's health. If the inaccurate positioning is discovered during the operation, the valve stent usually needs to be removed and repositioned, which increases the difficulty of the operation and reduces the efficiency of the operation.

[0004] Therefore, the present application designs a valve stent and an artificial heart valve prosthesis to solve the above-mentioned technical problems. SUMMARY

[0005] The technical problem to be solved by the present application is that the existing valve stent has the problem of inaccurate fixation position or insufficient sealing with the tissue around the heart, which may cause paravalvular leakage or regurgitation, which can greatly harm the patient's health. If the inaccurate positioning is discovered during the operation, the valve stent usually needs to be removed and repositioned, which increases the difficulty of the operation and reduces the efficiency of the operation.

[0006] The present application provides the following technical solution: a valve stent, comprising a positioning balloon and a valve stent, the positioning balloon is installed inside the valve stent, the valve stent is installed with a clamping valve, the clamping valve array is inside the valve stent, the positioning balloon is provided with a locking valve, the locking valve is provided with a locking through hole, the locking through hole is installed on the clamping valve, the positioning balloon is contracted to drive the clamping valve to contract, and then the valve stent is contracted for repositioning; the valve stent is further provided with a sealing balloon, the sealing balloon is used to completely seal the valve stent to cover the paravalvular leakage and regurgitation area, thereby preventing paravalvular leakage and regurgitation.

[0007] Preferably, the valve stent comprises support parts and folding parts, the support parts are net structures; the net structure support parts are used to realize the folding and shrinking effect of the valve stent; the folding parts are installed between the support parts, and the folding parts are used to be linked with the positioning air bag through clamping, that is, the positioning air bag pulls the folding parts by expanding, and then the folding parts pull the support parts to shrink or expand; the folding parts are V-shaped structures, and the V-shaped structure folding parts are used to realize the effect of quick folding or expansion; and the locking flaps are installed in the middle positions of the folding parts, and are used to be fixed with the clamping grooves of the support parts, so that when the clamping grooves and the folding parts are clamped, the stable expansion of the valve stent is realized, so as to cooperate with the heart valve to realize the stable work in the heart.

[0008] Preferably, the locking flaps are L-shaped, and the opening direction of the locking flaps is opposite to the advancing direction of the transport catheter; the opposite direction of the locking flaps is used to better move the locking flaps forward when the positioning air bag drives the valve stent to advance, and the locking flaps can be directly pulled away from the positioning flaps by pulling the positioning air bag after positioning, so that the positioning air bag is separated from the valve stent, and the installation work of the valve stent is completed.

[0009] Preferably, the support parts are provided with clamping grooves for clamping the folding parts, so that after the valve stent is completely expanded, the folding parts can support the entire valve stent, and at the same time, the clamping mode can not interfere with the adjustment effect of the folding parts during adjustment, and the valve stent is matched with the positioning air bag during expansion and positioning, that is, the positioning air bag expands to gradually expand the folding parts until the folding parts are clamped in the clamping grooves, at this time, the entire valve stent is in a stable state, and the valve stent will not shrink without external force, thereby ensuring the service life of the valve stent.

[0010] Preferably, the sealing air bag is a double-layer structure, which comprises a support air bag and an external air bag; the support air bag is provided with an inflation hole, and the support air bag is used to inflate and expand to ensure the sealing effect of the sealing air bag; the positioning air bag is provided with an inflation nozzle, and the inflation nozzle is used to inflate the inside of the support air bag; the inflation nozzle is inserted into the inflation hole in the initial state, and the inflation hole is provided with a sealing gasket, which is used to seal the support air bag after the inflation nozzle is removed after inflation.

[0011] Preferably, the sealing gasket circular array is in the inflation hole, the sealing gasket is used for sealing the inflation hole; and each of the sealing gaskets is provided with an elongated sealing part, the elongated sealing part is used for further consolidating the sealing of the sealing gasket, each of the elongated sealing parts is connected with the adjacent sealing gasket; when the inflation nozzle is inserted, the sealing gasket is in an open state at this time, when the inflation nozzle is extracted, the sealing gaskets are interlocked with each other due to the existence of the elongated sealing part and the gas pressure in the air bag, thereby avoiding the gas escape and ensuring the sealing property of the sealing air bag.

[0012] Preferably, the support air bag has a star-shaped structure in cross section, and four corners of the support air bag are connected with the outer air bag; the star-shaped sealing air bag is used for driving the outer air bag to expand when expanding, thereby better realizing the sealing effect of the sealing air bag, and further facilitating the arrangement of the flow guide channel in the outer air bag to further avoid the blood backflow, and under the action of the star-shaped air bag, the sealing air bag can better drive the valve stent to be clamped in the heart.

[0013] Preferably, the outer air bag is provided with a first flow guide hole at the top, the support air bag is provided with a second flow guide hole, and the outer air bag is provided with a third flow guide hole at the bottom; the first flow guide hole arranged in the outer air bag is used for collecting the backflow blood, the second flow guide hole is used for guiding the blood from the upper part of the outer air bag to the lower part of the outer air bag, and the blood is discharged through the third flow guide hole, and the discharged blood is pumped through the heart valve to the whole body along with the next round of blood.

[0014] Preferably, the third flow guide hole is provided with a sealing cover, and the sealing cover is provided with a pressure sheet; the sealing cover is used for sealing the third flow guide hole, the third flow guide hole is in a normally closed state under the action of the sealing cover, and the sealing cover is made of a soft material, that is, the sealing cover can be designed to be turned around one side, and an elastic line is arranged on the other side of the sealing cover, so that the normally closed state of the sealing cover can be ensured in the normal state; the pressure sheet arranged on the sealing cover is used for being pressed by the blood when the blood is pumped, so that the sealing cover is opened, thereby making the backflow blood flow to the whole body along with the pumped blood again, and the sealing cover is closed in the process without blood pumping, so as to avoid the blood backflow phenomenon.

[0015] An artificial heart valve prosthesis is installed in the valve stent.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The present application realizes the expansion of the valve stent by setting the positioning valve and the clamping valve on the valve stent and the positioning balloon, and when the valve stent is not positioned accurately, the positioning balloon is contracted to drive the locking valve and the clamping valve to contract, so as to make the valve stent contract, thereby facilitating repositioning; in this way, the steps of valve stent recovery can be simplified, the difficulty of the operation is reduced, and the operation efficiency is improved.

[0018] 2. The present application avoids the occurrence of the reflux phenomenon by sealing the balloon, by dividing the sealing balloon into a support balloon and an external balloon, and by the flow guide circuit inside the external balloon to make the reflux liquid flow out together with the liquid pumped out by the next heart beat, thereby effectively avoiding the occurrence of the reflux phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a schematic diagram of the whole application;

[0021] Figure 2 is a schematic diagram of the positioning balloon and the valve stent of the present application;

[0022] Figure 3 is a schematic diagram of the clamping valve position of the present application;

[0023] Figure 4 is a schematic diagram of the cooperation of the clamping valve and the locking valve of the present application;

[0024] Figure 5 is a schematic diagram of the position of the support part and the folding part of the present application;

[0025] Figure 6 is a schematic diagram of the internal relationship of the sealing balloon of the present application;

[0026] Figure 7 is an enlarged view of point A of the present application;

[0027] Figure 8 is a schematic diagram of the internal structure of the inflation hole of the present application;

[0028] Figure 9 is a schematic diagram of the position of the flow guide hole of the present application;

[0029] Figure 10 is a schematic diagram of the reflux flow of the present application;

[0030] Figure 11 is a B point amplification diagram of the present application.

[0031] In the figure: 1, positioning air bag; 11, locking flap; 12, locking through hole; 13, inflation nozzle; 2, valve stent; 21, support part; 211, clamping groove; 22, folding part; 23, clamping flap; 3, sealing air bag; 31, supporting air bag; 311, inflation hole; 312, sealing gasket; 313, extended sealing part; 32, external air bag; 321, first flow guide hole; 322, second flow guide hole; 323, third flow guide hole; 324, sealing cover; 325, pressure sheet. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed. Such terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] It should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The embodiments of the present disclosure aim to solve the problem that the existing valve stents cause paravalvular leakage or regurgitation due to inaccurate fixation position or insufficient sealing with the tissue around the heart, which greatly damages the health of the patient. If the inaccurate positioning is found during the operation, the valve stent usually needs to be removed and then repositioned, which increases the difficulty of the operation and reduces the efficiency of the operation. Therefore, the embodiments of the present disclosure propose a valve stent and an artificial heart valve prosthesis. The mechanism changes the traditional external heating to internal heating, and sets a positioning valve and a clamping valve on the valve stent and the positioning balloon, so as to drive the valve stent to expand when the positioning balloon expands. When the valve stent is not accurately positioned, the positioning balloon is contracted to drive the clamping valve to contract, so as to contract the valve stent for repositioning. In this way, the steps of recovering the valve stent can be simplified, the difficulty of the operation is reduced, and the efficiency of the operation is improved. Meanwhile, the sealing balloon is divided into a supporting balloon and an external balloon. When the heart valve regurgitates, the liquid flowing back is discharged together with the liquid pumped out by the next heartbeat due to the flow guide circuit in the external balloon, so as to effectively avoid the occurrence of regurgitation.

[0037] As shown in Figures 1 to 11 A valve stent, comprising a positioning balloon 1 and a valve stent 2, the positioning balloon 1 is installed inside the valve stent 2, the valve stent 2 is installed with a clamping valve 23, the clamping valve 23 is arranged inside the valve stent 2, and the clamping valve 23 is used to provide support for the locking valve 11; the positioning balloon 1 is provided with a locking valve 11, the locking valve 11 is provided with a locking through hole 12, the locking through hole 12 is installed on the clamping valve 23, and the positioning balloon 1 drives the clamping valve 23 to contract by contraction, so as to contract the valve stent 2 for repositioning; the valve stent 2 is further provided with a sealing balloon 3, the sealing balloon 3 is used to completely seal the valve stent 2 to cover the paravalvular leakage and regurgitation area, so as to prevent the paravalvular leakage and regurgitation;

[0038] When working, the worker drives the positioning air bag 1 and the valve support 2 to the designated position by the guide pipe, then inflates the positioning air bag 1, the inflated positioning air bag 1 drives the valve support 2 to expand, when the valve support 2 is expanded completely, the sealing air bag 3 is also inflated completely to fix the valve support 2 and the heart valve at the designated position, at the same time, the locking petals 11 in the positioning air bag 1 are still on the clamping petals 23 of the valve support 2, when the valve support 2 needs to be adjusted, only needs to suck the positioning air bag 1 to make it shrink, then the positioning air bag 1 makes the locking petals 11 drive the clamping petals 23 to shrink through the shrink, then the valve support 2 is shrunk to reposition; after the position of the valve support 2 is determined, the worker pulls the positioning air bag 1 backward to make the locking petals 11 separate from the clamping petals 23, then the positioning air bag 1 is shrunk and removed;

[0039] The cooperation of the valve support 2 and the positioning air bag 1 can control the shrink of the valve support 2 through the shrink of the air bag, then the repeated positioning of the valve support 2 is realized, at the same time, the sealing air bag 3 arranged on the valve support 2 can further increase the sealing effect of the valve support 2; the valve support 2 recovery steps can be simplified by this way, at the same time, the difficulty of the operation is reduced and the operation efficiency is increased.

[0040] As shown in Figures 2 to 5 The valve support 2 includes the support part 21 and the folding part 22, the support part 21 is a net structure; the net structure support part 21 is used to realize the folding and shrink effect of the valve support 2; the folding part 22 is installed between the support parts 21, the folding part 22 is used to link with the positioning air bag 1 through the clamping petals 23, that is, the positioning air bag 1 drives the folding part 22 to shrink or expand through the expansion; the folding part 22 is a v-shaped structure, the v-shaped folding part 22 is used to realize the quick folding or expansion effect; and the locking petals 11 are installed in the middle position of the folding part 22 to fix the clamping grooves 211 of the support part 21, then the stable expansion of the valve support 2 is realized when the clamping grooves 211 and the folding part 22 are clamped, so as to realize the stable work in the heart together with the heart valve.

[0041] The valve support 2 with the cooperation of the support part 21 and the folding part 22 can better position the valve support 2 compared with the direct expansion of the existing valve support 2, at the same time, the valve support 2 can be guaranteed not to be damaged and the damage to the human tissue can be avoided when the valve support 2 is repeatedly positioned in the process of adjusting the valve support 2.

[0042] As shown in Figure 3 and Figure 4As shown, the locking flap 11 is L-shaped and the opening direction of the locking flap 11 is opposite to the advancing direction of the delivery catheter. The opposite direction of the locking flap 11 is used to better move the locking flap 11 forward by the positioning balloon 1 during the process of advancing the valve stent 2 by the positioning balloon 1. After the positioning is completed, the positioning balloon 1 can be directly pulled to make the locking flap 11 quickly separate from the positioning flap, and then the positioning balloon 1 separates from the valve stent 2, and the installation of the valve stent 2 is completed.

[0043] As shown in the figure, Figure 5 As shown, the support part 21 is provided with a clamping groove 211 clamped with the folding part 22. The clamping groove 211 is used to clamp the folding part 22, so that the folding part 22 can support the entire valve stent 2 after the valve stent 2 is completely unfolded. At the same time, the clamping method can not interfere with the adjustment effect of the folding part 22 during adjustment. During the unfolding and positioning of the valve stent 2, the positioning balloon 1 is inflated to gradually unfold the folding part 22 until the folding part 22 is clamped in the clamping groove 211. At this time, the entire valve stent 2 is in a stable state, and the valve stent 2 will not shrink without external force, thereby ensuring the service life of the valve stent 2.

[0044] As shown in the figure, Figure 6 As shown, the sealing balloon 3 is a double-layer structure, including a support balloon 31 and an external balloon 32. The support balloon 31 is provided with an inflation hole 311. The support balloon 31 is inflated to ensure the sealing effect of the sealing balloon 3. The positioning balloon 1 is provided with an inflation nozzle 13. The inflation nozzle 13 is used to inflate the inside of the support balloon 31. The inflation nozzle 13 is inserted into the inflation hole 311 in the initial state. The inflation hole 311 is provided with a sealing gasket 312. The sealing gasket 312 is used to seal the support balloon 31 after the inflation nozzle 13 is removed after inflation.

[0045] During work, the gas is injected into the inside of the support balloon 31 through the inflation nozzle 13 and the inflation hole 311 during the inflation of the positioning balloon 1. At this time, the support balloon 31 is inflated and supported. The inflated support balloon 31 supports the external balloon 32. At this time, the entire sealing balloon 3 seals the gap between the valve stent 2 and the human body. When the positioning balloon 1 is extracted, the soft inflation nozzle 13 is pulled out of the inflation hole 311. When the inflation hole 311 is pulled out, the sealing gasket 312 blocks the inflation hole 311 under the action of the gas pressure to complete the sealing work of the balloon.

[0046] The sealing mechanism of the double-sided balloon is used to prevent the occurrence of backflow when the heart valve backflows. The external balloon 32 has a flow guide circuit, which makes the backflow liquid flow out with the liquid pumped out by the next heart beat, thereby effectively avoiding the occurrence of backflow.

[0047] As shown in Figure 6 and Figure 7 The sealing gasket 312 circular array in the inflation hole 311, sealing gasket 312 for sealing inflation hole 311; and each of the sealing gasket 312 is provided with an elongated sealing part 313, the elongated sealing part for further consolidation of the sealing gasket 312, each elongated sealing part 313 is connected with the adjacent sealing gasket 312;

[0048] When the inflation nozzle 13 is inserted, the sealing gasket 312 is in the open state, when the inflation nozzle 13 is extracted, due to the existence of the elongated sealing part 313 and the existence of the air pressure in the air bag, the sealing gasket 312 is interlocked with each other, thereby avoiding the escape of gas and ensuring the sealing of the sealing air bag 3.

[0049] As shown in Figure 6 and Figure 7 The support air bag 31 is in star-shaped structure, and the four corners of the support air bag 31 are connected with the outer air bag 32. The sealing air bag 3 in star-shaped structure is used to drive the outer air bag 32 to expand when it is inflated, thereby better realizing the sealing effect of the sealing air bag 3, and further facilitating the setting of the flow guide channel in the outer air bag 32 to further avoid blood backflow. Under the action of the star-shaped air bag, the sealing air bag 3 can better drive the valve stent 2 to be clamped tightly inside the heart.

[0050] As shown in Figure 9 The outer air bag 32 is provided with a first flow guide hole 321 at the top, and the support air bag 31 is provided with a second flow guide hole 322. The outer air bag 32 is provided with a third flow guide hole 323 at the bottom. The first flow guide hole 321 is arranged in the outer air bag 32 for collecting backflow blood. The second flow guide hole 322 is used to flow blood from the upper part of the outer air bag 32 to the lower part of the outer air bag 32, and then flows out through the third flow guide hole 323. The outflow blood is pumped through the heart valve to the whole body with the next round of blood;

[0051] For some older patients, due to age, the heart pumping function components will be weak, and with the aging of the original heart valve, backflow effect will be generated. After the interventional stent surgery, the new heart valve is replaced, but part of the blood still stays on both sides of the heart valve. The above flow guide circuit can make the blood flow through the first flow guide hole 321 to the second flow guide hole 322 and then to the third flow guide hole 323 and be pumped out with the next blood pump;

[0052] And because of the double-layer mechanism of the sealing air bag 3 and the star-shaped structure of the inner supporting air bag 31, a complete blood flow channel can be formed under the premise of ensuring good supporting effect, and the occurrence of symptoms such as paravalvular leakage and regurgitation is further avoided.

[0053] As shown in Figure 10 and Figure 11 The third flow hole 323 is provided with a sealing cover 324, and the sealing cover 324 is provided with a pressure sheet 325. The sealing cover 324 is used to seal the third flow hole 323, and the third flow hole 323 is in a normally closed state under the action of the sealing cover 324. The sealing cover 324 is made of soft material, that is, it can be designed to turn over on one side. At the same time, an elastic line is arranged on the other side of the sealing cover 324, which can ensure the normally closed state of the sealing cover 324 in a normal state. The pressure sheet 325 arranged on the sealing cover 324 is used to press the pressure sheet 325 with blood when blood is pumped, so that the sealing cover 324 is opened, and then the regurgitant blood is again flowed to the whole body along with the pumped blood. The sealing cover 324 is closed in the process without blood pumping, so as to avoid the phenomenon of blood regurgitation.

[0054] An artificial heart valve prosthesis is installed in the valve stent.

[0055] The overall working process is as follows: the staff operates the catheter to drive the positioning air bag 1 and the valve stent 2 to the specified position, and then inflates the positioning air bag 1. The inflated positioning air bag 1 drives the valve stent 2 to expand. When the valve stent 2 is expanded, the sealing air bag 3 is also inflated to fix the valve stent 2 and the heart valve at the specified position. At the same time, the locking valve 11 in the positioning air bag 1 is still on the clamping valve 23 of the valve stent 2. When it is necessary to adjust the valve stent 2, only the positioning air bag 1 is sucked to shrink, so that the positioning air bag 1 drives the clamping valve 23 to shrink by shrinking the locking valve 11, and then the valve stent 2 is shrunk to facilitate repositioning. After the position of the valve stent 2 is determined, the staff pulls the positioning air bag 1 backward to make the locking valve 11 separate from the clamping valve 23, and then the positioning air bag 1 is shrunk and removed.

[0056] In the process of inflating the positioning air bag 1, the sealing air bag 3 is also inflated, and the inflation nozzle 13 is inserted at this time, and the sealing gasket 312 is in an open state, when the inflation nozzle 13 is extracted, due to the existence of the extended sealing part 313 and the existence of the air pressure in the air bag, the sealing gasket 312 is interlocked with each other, thereby avoiding the escape of gas, and ensuring the sealing property of the sealing air bag 3; after the sealing air bag 3 is inflated, the sealing air bag 3 drives the valve stent 2 to be installed in the heart; when blood reflux occurs, the blood flows through the first flow hole 321 to the second flow hole 322, and then to the third flow hole 323 and is sent out together with the next blood pumping, and the sealing cover 324 is normally closed in the normal state, and the pressure sheet 325 is arranged on the sealing cover 324, which is used to press the pressure sheet 325 by the blood when the blood is pumped, so that the sealing cover 324 is opened, thereby making the reflux blood flow to the whole body again with the pumped blood, and the sealing cover 324 is closed in the process without blood pumping, so as to avoid the blood reflux phenomenon.

[0057] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A valve stent, characterized by, The application relates to a valve stent and a positioning balloon, which comprises a positioning balloon (1) and a valve stent (2), the positioning balloon (1) is arranged in the valve stent (2), a clamping valve (23) is arranged in the valve stent (2), the clamping valve (23) is arranged in the valve stent (2) in an array, a locking valve (11) is arranged on the positioning balloon (1), a locking through hole (12) is arranged on the locking valve (11), the locking through hole (12) is arranged on the clamping valve (23), the positioning balloon (1) is contracted to drive the locking valve (11) and the clamping valve (23) to contract, and then the valve stent (2) is contracted to facilitate repositioning; a sealing balloon (3) is further arranged on the valve stent (2), the sealing balloon (3) is used for completely sealing the valve stent (2) to cover a perivalvular leakage and a regurgitation area, and then perivalvular leakage and regurgitation are prevented. The valve stent (2) comprises a supporting part (21) and a folding part (22), the supporting part (21) is a net structure; the folding part (22) is arranged between the supporting parts (21), the folding part (22) is a V-shaped structure, and a locking valve (11) is arranged at a middle position of the folding part (22); The locking valve (11) is L-shaped, and the initial direction of the locking valve (11) is opposite to the forward direction of a delivery catheter; The supporting part (21) is provided with a clamping groove (211) which is clamped with the folding part (22).

2. The valve stent of claim 1, wherein: The sealing balloon (3) is a double-layer structure, and comprises a supporting balloon (31) and an external balloon (32); the supporting balloon (31) is provided with an inflation hole (311), the positioning balloon (1) is provided with an inflation nozzle (13), the inflation nozzle (13) is inserted into the inflation hole (311) in an initial state, and the inflation hole (311) is provided with a sealing gasket (312).

3. The valve support of claim 2, wherein: The sealing gasket (312) is arranged in an array in the inflation hole (311), and each sealing gasket (312) is provided with an extension sealing part (313), and each extension sealing part (313) is connected with an adjacent sealing gasket (312).

4. The valve support of claim 3, wherein: The supporting balloon (31) is a star-shaped structure in cross section, and four corners of the supporting balloon (31) are connected with the external balloon (32).

5. The valve support of claim 4, wherein: The external balloon (32) is provided with a first flow guide hole (321) at the top, the supporting balloon (31) is provided with a second flow guide hole (322), and the external balloon (32) is provided with a third flow guide hole (323) at the bottom.

6. The valve support of claim 5, wherein: The third flow guide hole (323) is provided with a sealing cover (324), and the sealing cover (324) is provided with a pressure sheet (325).

7. A prosthetic heart valve prosthesis, characterized by: The application is arranged in the valve stent.

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