Valve stent and interventional heart prosthetic valve

Abstract

The invention relates to the technical field of medical instruments, in particular to a valve stent and an interventional heart prosthetic valve, comprising a stent body and a support ring, and further comprising an anchoring assembly, a contraction rope and a sliding assembly; each frame on the top of the support body is provided with a limiting base. An anchoring assembly is rotationally mounted on the limiting base; the anchoring assemblies are distributed on the top of the support body in a circumferential array mode. Shrinkage ropes are unidirectionally connected in series among the anchoring assemblies which are circumferentially distributed; one end of the contraction rope is fixedly connected to the first anchoring assembly, and the other end of the contraction rope penetrates through the last anchoring assembly and is connected with the sliding assembly. The sliding assembly is installed on the outer side face of the support body. When the telescopic rope is pulled through the sliding assembly, the telescopic rope drives the multiple anchoring blocks to rotate through friction force in the penetrating process, then the anchoring thorns on the anchoring blocks are made to rotate inwards to be folded, and therefore the problem that in the conveying process of the stent body, the anchoring thorns damage blood vessels is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a valve stent and an interventional heart prosthetic valve. Background Art

[0002] Traditional valve replacement requires open-chest surgery, which is traumatic and takes a long time to recover. It also carries a higher surgical risk for elderly patients or patients with other diseases. Therefore, the development of interventional technology provides new treatment options for these patients. The emergence of interventional heart prosthetic valves (such as transcatheter aortic valve replacement, TAVR) has made it possible to perform valve replacement through minimally invasive surgery, avoiding open-chest surgery.

[0003] Transcatheter aortic valve replacement (TAVR) has the advantages of minimally invasive and fast recovery. However, one of the most common problems with TAVR is paravalvular leakage, especially in patients with complex anatomical structures or severe valve calcification. Since the artificial valve cannot be completely sealed with the surrounding tissue, blood leaks through the gap. At the same time, in the early stage of stent delivery and positioning, the stent is easily offset because the anchoring between the stent and the arterial tissue is not tight enough. Therefore, anchoring the stent with barbs can ensure that the stent is fixed in place in the blood vessel after implantation; however, the barbs may cause friction or damage to the inner wall of the blood vessel during stent delivery, thereby affecting the smooth delivery of the stent; on the one hand, the barbs need to be sharp and strong enough to ensure that the stent can be firmly anchored in the target position after implantation; on the other hand, it is necessary to avoid damage and resistance to the inner wall of the blood vessel caused by the barbs during delivery.

[0004] In view of the above situation, in order to overcome the above technical problems, the present invention designs a valve stent and an interventional heart prosthetic valve to solve the above technical problems. Summary of the invention

[0005] The technical purpose to be achieved by the present invention is: by pulling the retraction rope on the stent through the sliding component, the stent is quickly retracted and folded, while the retraction rope uses friction to drive the barbs to rotate, thereby retracting the barbs and preventing the barbs from damaging the blood vessels during the stent delivery.

[0006] In order to achieve the above technical objectives, the present invention provides the following technical solutions: The present invention provides a valve stent, comprising a stent body and a support ring, wherein the stent body is composed of a mesh frame, and a support ring for supporting the valve body structure is installed at the bottom of the stent body; Also included are an anchor assembly, a retraction cord, and a slide assembly; A limited position base is installed on each frame at the top of the bracket body; An anchoring assembly is rotatably mounted on the limiting base; The anchoring components are arranged in a circumferential array on the top of the support body; a contraction rope is arranged in series in one direction between the circumferentially arranged anchoring components; One end of the retractable rope is fixedly connected to the first anchoring assembly, and the other end of the retractable rope passes through the last anchoring assembly and is connected to the sliding assembly; The sliding assembly is mounted on the outer side of the bracket body; the sliding assembly pulls the retractable rope by sliding, and then the retractable rope pulls the anchor assembly by friction, and the anchor assembly rotates on the limiting base under the pulling of the retractable rope.

[0007] The anchoring assembly is composed of a plurality of anchoring blocks, which are installed in a circular array on the bracket body in sequence, and the retraction rope passes through the plurality of anchoring blocks in sequence; a limiting slide groove is provided on the limiting base; the sliding assembly includes a sliding base and a retraction slide buckle, the sliding base is installed on the outer side of the bracket body, a retraction rope passes through a part of the sliding base, and the retraction slide buckle is slidably installed on the sliding base and connected to the retraction rope.

[0008] The anchoring assembly is composed of a plurality of anchoring blocks, which are sequentially installed in a circumferential array on the stent body. Its core function is to ensure that the stent can be firmly anchored at the target position during the implantation process and after it is in place. By passing the retracting rope through the plurality of anchoring blocks in sequence, the linkage control between the sliding assembly and the anchoring blocks is realized. The sliding assembly drives the rotation of the anchoring blocks by pulling or loosening the retracting rope, thereby controlling the deployment and retraction of the anchoring thorns.

[0009] The anchor block is composed of two parts, a left part and a right part. The bottom end of the anchor block is rotatably mounted on the limit base through a limit rotating shaft. The bottom end of the anchor block contacts the limit sliding groove through the elastic pad thereon.

[0010] The limiting slide groove is symmetrically opened on the limiting base along the rotation center of the anchor assembly; the limiting slide groove is inclined, so that the anchor block automatically slides and resets after losing the traction of the retraction rope. When the anchor block is pulled, the elastic pad is compressed to a certain extent in the limiting slide groove, providing a stable support force for the rotation of the anchor block, avoiding the instability of the anchor block caused by excessive movement or external force. This buffer mechanism ensures the smooth rotation of the anchor block under various conditions, and the elastic pad can quickly reset after releasing the pressure, so that the anchor thorn can be deployed in time when needed.

[0011] The support body is provided with a foldable folding rope frame, which supports and guides the retracting rope to pass through the anchor assembly and the sliding base. The foldability of the folding rope frame enables it to maintain the compactness of the connection series when the support is retracted, and can also be stretched to a suitable length when the support is unfolded, thereby ensuring that the retracting rope is always in a proper tension state.

[0012] The left part of the anchor block is provided with a through hole for the contraction rope to pass through, and a guide rope groove is provided outside the through hole, and the inner diameter of the guide rope groove does not exceed the inner diameter of the through hole. The right part of the anchor block is provided with an anchor thorn. By providing the through hole and the guide rope groove on the left part of the anchor block, an effective guide and fixing path is provided for the smooth sliding of the contraction rope, ensuring that the contraction rope can smoothly control the movement of the anchor thorn when pulling the anchor block; the combination of the guide rope groove and the through hole effectively prevents the winding and sliding obstruction of the contraction rope, and improves the stability and safety of the anchor assembly during the stent implantation and fixation process.

[0013] A guide rail is provided on the side of the sliding base, and a traction groove is provided in the middle of the sliding base; a connecting ring is installed on the inner side of the retractable slide buckle, and the connecting ring extends inward through the traction groove and is connected to the retractable rope, and the retractable slide buckle is slidably installed on the guide rail through the slide rail buckles on both sides of the interior.

[0014] An invasive heart prosthetic valve provided by the present invention comprises an artificial valve, wherein the artificial valve is mounted on the inner wall of a stent body; The artificial valve is connected to the stent body through a valve suture, and the valve suture is in a contracted active state. The active end of the valve suture passes through the lower part of the sliding base and is connected to the connecting ring.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention connects a plurality of anchor blocks in series through a retractable rope, so that when the retractable rope is pulled by a sliding component, the retractable rope drives the plurality of anchor blocks to rotate by utilizing the friction force during the passage, so that the anchor thorns on the anchor blocks rotate inward and retract, thereby preventing the anchor thorns on the stent body from damaging the blood vessel during the transportation process.

[0016] 2. The present invention connects the sliding component to the valve suture, thereby loosening the valve suture when the stent contracts, thereby reducing the pulling force when the valve prosthesis contracts, thereby preventing the artificial valve from tearing during the contraction process; and when the stent expands, the sliding component loosens the contraction rope at the upper end and contracts the valve suture at the lower end, thereby ensuring the suture tightness of the artificial valve.

[0017] 3. The present invention provides a rope guide groove on the anchor block so that the contraction rope passes through a plurality of anchor blocks. When the anchor block gradually becomes parallel to the contraction rope, the contraction rope can slide in the rope guide groove, thereby improving the sliding smoothness of the contraction rope and preventing the anchor block from rotating, winding and locking the contraction rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the support body of the present invention; Figure 2 It is a schematic diagram of the installation relationship between the anchor assembly and the sliding assembly of the present invention; Figure 3 is a side schematic diagram of the support body of the present invention; Figure 4 The present invention Figure 2 An enlarged schematic diagram of point a; Figure 5 The present invention Figure 2 An enlarged schematic diagram of point b; Figure 6 The present invention Figure 3 An enlarged schematic diagram of point c; Figure 7 is a schematic structural diagram of the anchor assembly of the present invention; Figure 8 It is a structural schematic diagram of the shrinking slider of the present invention.

[0020] In the figure: 1. bracket body; 11. limiting base; 111. limiting slide; 12. folding rope frame; 2. artificial valve; 21. valve suture; 3. anchoring assembly; 4. retraction rope; 5. sliding assembly; 51. sliding base; 511. guide rail; 512. traction slide; 52. retraction slide buckle; 521. connecting ring; 522. slide rail buckle; 6. anchoring block; 61. guide rope groove; 62. anchoring thorn; 7. elastic pad; 8. limiting shaft. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. Such terms are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0024] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The disclosed embodiments are intended to solve the problem that the existing barbs may cause friction or damage to the inner wall of the blood vessel during the stent delivery process, thereby affecting the smooth delivery of the stent; on the one hand, the barbs need to be sharp and strong enough to ensure that the stent can be firmly anchored in the target position after implantation; on the other hand, it is necessary to avoid the problem of damage and resistance to the inner wall of the blood vessel caused by the barbs during the delivery process. In view of this, the disclosed embodiments propose a vibration sensor for the operation of mechanical equipment, which connects multiple anchor blocks in series through a retractable rope, so that when the retractable rope is pulled by the sliding component, the retractable rope uses the friction force during the passage process to drive the multiple anchor blocks to rotate, thereby causing the anchoring spikes on the anchoring blocks to rotate inward and retract, thereby preventing the anchoring spikes on the stent body from damaging the blood vessel during the delivery process.

[0026] like Figure 1-8 As shown, a valve stent provided by the present invention comprises a stent body 1 and a support ring, wherein the stent body 1 is composed of a mesh frame, and a support ring for supporting the valve body structure is installed at the bottom of the stent body 1; It also includes an anchoring assembly 3, a retracting rope 4 and a sliding assembly 5; A limited position base 11 is installed on each frame at the top of the bracket body 1; The anchor assembly 3 is rotatably mounted on the limiting base 11; The anchoring components 3 are arranged in a circumferential array on the top of the bracket body 1; a retractable rope 4 is arranged in series in one direction between the circumferentially arranged anchoring components 3; One end of the retractable rope 4 is fixedly connected to the first anchoring assembly 3, and the other end of the retractable rope 4 passes through the last anchoring assembly 3 and is connected to the sliding assembly 5; The sliding assembly 5 is installed on the outer side of the bracket body 1; the sliding assembly 5 pulls the retractable rope 4 by sliding, and then the retractable rope 4 uses friction to pull the anchor assembly 3, and the anchor assembly 3 rotates on the limiting base 11 under the pulling of the retractable rope 4.

[0027] The stent body 1 supports the valve body through a mesh frame and a support ring to ensure its structural stability; the anchoring assembly 3 is composed of a plurality of anchoring blocks 6, and the anchoring blocks 6 are installed on a limiting base 11 through a limiting rotating shaft 8, and are arranged in a circle around the stent body 1 in sequence; during operation, the anchoring blocks 6 are rotated by the pulling of the contraction rope 4, and the contraction rope 4 pulls and guides the plurality of anchoring blocks 6 through the sliding assembly 5, so that the anchoring spikes 62 of the anchoring blocks 6 are gradually folded inward or unfolded, thereby ensuring the contraction protection and stable anchoring of the stent in the appropriate position.

[0028] like Figure 2-5 As shown, the anchoring assembly 3 is composed of a plurality of anchoring blocks 6, and the anchoring blocks 6 are installed in a circular array on the bracket body 1 in sequence, and the retraction rope 4 passes through the plurality of anchoring blocks 6 in sequence; a limiting slide groove 111 is provided on the limiting base 11; the sliding assembly 5 includes a sliding base 51 and a retraction slide buckle 52, and the sliding base 51 is installed on the outer side of the bracket body 1, and the retraction rope 4 passes through a part of the sliding base 51, and the retraction slide buckle 52 is slidably installed on the sliding base 51 and connected to the retraction rope 4.

[0029] The limiting base 11 is provided with a limiting slide groove 111, which limits the rotation of the anchor block 6 and moves along a fixed track, ensuring that the rotation direction and angle of the anchor block 6 are controlled, thereby improving the accuracy of the deployment and retraction process of the anchor thorn 62. The limiting slide groove 111 not only ensures that the anchor block 6 runs smoothly during the contraction and deployment process, but also ensures that the anchor thorn 62 is deployed at the right time to avoid unnecessary tissue damage.

[0030] The operator pulls the retraction rope 4 through a sliding action, and the retraction rope 4 slides in the sliding base 51, driving the anchor block 6 to retract or unfold the anchor spikes 62 in turn; thereby ensuring the synchronization and coordination of the actions of each anchor block 6 during the stent deployment process, improving the stability of the stent anchoring, and avoiding the risk of stent displacement or loosening.

[0031] like Figure 6 and Figure 7As shown, the anchor block 6 consists of two parts, the left and right parts. The bottom end of the anchor block 6 is rotatably mounted on the limiting base 11 through the limiting rotating shaft 8. The bottom end of the anchor block 6 contacts the limiting sliding groove 111 through the elastic pad 7 thereon.

[0032] The anchor block 6 is divided into two parts, left and right, so that the through hole on the anchor block 6 for the contraction rope 4 to pass through is opened at a position deviated from the rotating axis, thereby ensuring that the contraction rope 4 can drive the anchor block 6 to rotate when sliding in the through hole; when the contraction rope 4 is pulled, the anchor block 6 rotates on the rotating axis, driving the anchor thorn 62 to retract or unfold inward, thereby ensuring that the anchor block 6 can be smoothly retracted and unfolded, especially during the stent implantation process, the movement of the anchor thorn 62 can be controlled to reduce damage to the blood vessel wall.

[0033] like Figure 4 and Figure 6 As shown, the limiting slide groove 111 is symmetrically opened on the limiting base 11 along the rotation center of the anchor assembly 3; the limiting slide groove 111 is inclined, so that the anchor block 6 automatically slides and returns to its original position after losing the traction of the retraction rope 4.

[0034] The limiting slide groove 111 is centrally and symmetrically arranged on the anchor assembly 3, so that the anchor block 6 can maintain a stable and balanced 90-degree rotation during the rotation process, thereby avoiding deviation or irregular movement; the limiting slide groove 111 is inclined, so that after the anchor block 6 loses the traction force of the retracting rope 4, the anchor block 6 can automatically reset by relying on gravity and the inclined structure of the limiting slide groove 111. When the retracting rope 4 is loosened, the anchor block 6 is no longer controlled by external force, but through the inclined setting of the limiting slide groove 111, the anchor block 6 can automatically return to the original position by relying on gravity.

[0035] like Figure 4 As shown, a foldable rope rack 12 is installed on the bracket body 1, and the foldable rope rack 12 supports and guides the retractable rope 4 to pass through the anchor assembly 3 and the sliding base 51.

[0036] The foldable rope rack 12 is foldable, so that it can flexibly adjust the support and folding forms during the contraction and expansion of the support body 1 to adapt to the state changes of the support body 1 at different stages. The foldable rope rack 12 mainly ensures that the contraction rope 4 can smoothly pass through the anchor assembly 3 and the sliding base 51, ensuring that the transmission and control process of the contraction rope 4 between different components is smooth and unobstructed. The foldable rope rack 12 helps to prevent the contraction rope 4 from getting entangled, knotted or stuck during movement.

[0037] like Figure 7As shown, the left part of the anchor block 6 is provided with a through hole for the contraction rope 4 to pass through, and a rope guide groove 61 is also provided on the outside of the through hole. The inner diameter of the rope guide groove 61 does not exceed the inner diameter of the through hole. The right part of the anchor block 6 is provided with an anchoring thorn 62.

[0038] The perforations and the guide grooves 61 ensure that the retracting rope 4 can control the rotation of the anchor block 6 when being pulled, thereby realizing the deployment and retraction of the anchor thorn 62; during operation, when the retracting rope 4 is pulled, the anchor block 6 transmits power through the retracting rope 4 in the perforations, thereby driving the deployment or retraction of the anchor thorn 62. The existence of the guide grooves 61 further ensures the smooth operation of the retracting rope 4, avoiding poor operation caused by friction or the rotation angle of the anchor block 6.

[0039] The side of the sliding base 51 is provided with a guide rail 511, and the middle of the sliding base 51 is provided with a traction groove 512; a connecting ring 521 is installed inside the retracting slider 52, and the connecting ring 521 extends inward through the traction groove 512 and is connected to the retracting rope 4, and the retracting slider 52 is slidably installed on the guide rail 511 through the slide rail buckles 522 on both sides of the inside. The function of the guide rail 511 is to provide a stable sliding path for the retracting slider 52 in the sliding assembly 5, and the sliding base 51 ensures that the retracting slider 52 can slide smoothly on the guide rail 511, thereby controlling the pulling and relaxing process of the retracting rope 4.

[0040] like Figure 1-8 As shown, an invasive heart prosthetic valve provided by the present invention comprises an artificial valve 2 and a valve stent, wherein the artificial valve 2 is mounted on the inner wall of the stent body 1; The artificial valve 2 is connected to the stent body 1 through the valve suture 21 . The valve suture 21 is in a contracted active state. The active end of the valve suture 21 passes through the lower part of the sliding base 51 and is connected to the connecting ring 521 .

[0041] The artificial valve 2 is connected to the inner wall of the stent body 1 through the valve suture 21; the suture has a retractable property, and the contraction and relaxation of the valve suture 21 are operated by the sliding component 5, thereby ensuring that the artificial valve 2 is firmly fixed on the stent and the reasonable tension is applied, thereby avoiding tearing and damaging the artificial valve 2 during operation; thereby ensuring the controllable expansion of the valve and reducing the risk of structural damage that may occur during transplantation.

[0042] During operation of the present invention, the operator pulls the sliding assembly 5 downward, and the sliding assembly 5 slides on the guide rail 511 by contracting the slider 52. At the same time, the connecting ring 521 on the slider 52 pulls the contraction rope 4 downward, and the contraction rope 4 passes through the sliding base 51 and the folding rope frame 12. The contraction rope 4 slides and drives the folding rope frame 12 to unfold through friction, and the contraction rope 4 slides on the multiple anchor blocks 6, and then the contraction rope 4 drives the multiple anchor blocks 6 to rotate through the perforations on the anchor blocks 6; at the same time, the connecting ring 521 on the slider 52 will also release the valve suture 21 downward, so that the connection between the artificial valve 2 and the stent body 1 is slightly loosened, thereby preventing the artificial valve 2 from being torn when it contracts.

[0043] The anchor block 6 is rotated on the limiting base 11 through the limiting rotating shaft 8 at the bottom end, thereby, the anchoring spikes 62 on the anchor block 6 are rotated inwardly and retracted, and the elastic pad 7 at the bottom end of the rotating anchor block 6 is rotated along the inclined limiting sliding groove 111, so that the elastic pad 7 is compressed to a certain extent; when the anchor block 6 is rotated inwardly to nearly 90 degrees, the retracting rope 4 will be embedded in the rope guide groove 61 next to the perforation, thereby preventing the retracting rope 4 from being locked by the rotation of the anchor block 6; Then, the operator transports the contracted and loaded stent to the transplant site, and as the balloon expands to unfold the stent body 1, the contraction rope 4 is expanded by the stent body 1 and pulls the contraction slide buckle 52 to slide upward, thereby the contraction slide buckle 52 pulls the valve suture 21 to fit and tighten the artificial valve 2 on the stent body 1; at the same time, the compressed elastic pad 7 on the anchor block 6 is reset under the guidance of the inclined limiting groove 111, and then the anchor block 6 is rotated outward 90 degrees to unfold the anchor thorn 62, thereby realizing timely anchoring of the transplant site.

[0044] The foregoing is merely an excerpt from the disclosure that these modifications may be made to the invention in light of the above detailed description. The terms used in the appended claims should not be construed to limit the invention to the specific embodiments disclosed in the specification. Instead, the scope of the invention will be determined entirely by the appended claims, which will be interpreted in accordance with established principles of claim interpretation.

Claims

1. A valve stent, comprising a stent body (1) and a support ring, wherein the stent body (1) is composed of a mesh frame, and a support ring for supporting the valve body structure is installed at the bottom of the stent body (1); Features: It also includes an anchoring component (3), a retracting rope (4) and a sliding component (5); A limited position base (11) is installed on each frame at the top of the bracket body (1); An anchoring assembly (3) is rotatably mounted on the limiting base (11); The anchoring components (3) are distributed in a circumferential array on the top of the stent body (1); a retractable rope (4) is unidirectionally connected in series between the circumferentially distributed anchoring components (3); One end of the retractable rope (4) is fixedly connected to the first anchoring component (3), and the other end of the retractable rope (4) passes through the last anchoring component (3) and is connected to the sliding component (5); The sliding assembly (5) is mounted on the outer side of the bracket body (1); the sliding assembly (5) pulls the retractable rope (4) by sliding, and the retractable rope (4) then pulls the anchor assembly (3) by friction, and the anchor assembly (3) rotates on the limiting base (11) under the pulling of the retractable rope (4).

2. A valve stent according to claim 1, characterized in that: The anchoring assembly (3) is composed of a plurality of anchoring blocks (6), the anchoring blocks (6) are sequentially mounted in a circular array on the support body (1), and the retractable rope (4) passes through the plurality of anchoring blocks (6) in sequence; the limiting base (11) is provided with a limiting sliding groove (111); the sliding assembly (5) comprises a sliding base (51) and a retractable sliding buckle (52), the sliding base (51) is mounted on the outer side of the support body (1), the retractable rope (4) passes through a portion of the sliding base (51), and the retractable sliding buckle (52) is slidably mounted on the sliding base (51) and connected to the retractable rope (4).

3. A valve stent according to claim 2, characterized in that: The anchor block (6) is composed of two parts, the left and right parts. The bottom end of the anchor block (6) is rotatably mounted on the limit base (11) via a limit rotating shaft (8). The bottom end of the anchor block (6) is in contact with the limit sliding groove (111) via an elastic pad (7) thereon.

4. A valve stent according to claim 3, characterized in that: The limiting slide groove (111) is symmetrically provided on the limiting base (11) along the rotation center of the anchor assembly (3); the limiting slide groove (111) is inclined so that the anchor block (6) automatically slides and resets after losing the traction of the retracting rope (4).

5. A valve stent according to claim 2, characterized in that: A foldable folding rope frame (12) is mounted on the support body (1), and the folding rope frame (12) supports and guides the retractable rope (4) to pass through the anchor assembly (3) and the sliding base (51).

6. A valve stent according to claim 2, characterized in that: The left portion of the anchor block (6) is provided with a through hole for the contraction rope (4) to pass through, and a rope guide groove (61) is provided outside the through hole, the inner diameter of the rope guide groove (61) does not exceed the inner diameter of the through hole, and the right portion of the anchor block (6) is provided with an anchoring thorn (62).

7. A valve stent according to claim 2, characterized in that: A guide rail (511) is provided on the side of the sliding base (51), and a traction groove (512) is provided in the middle of the sliding base (51); a connecting ring (521) is installed inside the retractable slide buckle (52); the connecting ring (521) extends inward through the traction groove (512) and is connected to the retractable rope (4); the retractable slide buckle (52) is slidably installed on the guide rail (511) through the slide rail buckles (522) on both sides of the interior.

8. The invasive heart prosthetic valve according to claim 7, characterized in that: It comprises an artificial valve (2), wherein the artificial valve (2) is mounted on the inner wall of the stent body (1); The artificial valve (2) is connected to the stent body (1) via a valve suture (21), the valve suture (21) being in a contracted active state, and the active end of the valve suture (21) passes through the lower part of the sliding base (51) and is connected to the connecting ring (521).

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