Aortic valve stent

Abstract

The aortic valve stent comprises an outflow port end, the outflow port end comprises a plurality of stent units, the bottoms of the stent units are connected with a main frame supporting body, and the bottom of the main frame supporting body is connected with an inflow port; an inner support is arranged in a mesh formed by connecting each support unit and the main frame supporting body, an annular frame body is arranged on the main frame supporting body where the inner supports are located in the circumferential direction of the main frame supporting body, and the tops of the inner supports are bent outwards in the state that the tops of the inner supports are not connected with the annular frame body. The inner support capable of being detached and released again is arranged on the aortic valve support, the aortic valve support is provided with the inner support capable of being detached and released again, the aortic valve support is connected with the half-moon valve of the aortic valve, and therefore the half-moon valve of the aortic valve can be stretched and shaped; and the function of the aortic valve can be recovered under the condition that the bioprosthetic valve does not reach the replacement age limit or the replacement standard.

Description

Technical Field

[0001] The present invention relates to the technical field of aortic valve stents, and in particular to an aortic valve stent. Background Art

[0002] Transcatheter aortic valve replacement (TAVR) is a procedure that compresses a stent with a bioprosthetic valve and inserts it into a catheter outside the body. The stent is then delivered to the aortic root along the peripheral blood vessels or the apex of the heart, where it is released and fixed to the native aortic valve ring to replace the native aortic valve. Currently, transcatheter aortic valve replacement has become the first-line treatment for elderly patients with aortic stenosis, especially those at high risk of surgical intervention.

[0003] When choosing the type of valve, doctors will consider factors such as the patient's age, activity level, life expectancy, and tolerance to long-term anticoagulation therapy. Also, because aortic valve replacement surgery may face the risk of reoperation, this risk is mainly related to the type of implanted valve, individual differences in patients, the long-term durability of the valve, and the patient's long-term health management status. The main reason is that biological valves (such as bovine pericardial valves, porcine heart valves or artificial biological tissue valves) are usually more susceptible to aging than mechanical valves. Over time, biological valves will undergo degenerative changes, and both mechanical membranes and biological membranes face problems such as valve enlargement and valve closure failure. Summary of the invention

[0004] The object of the present invention is to provide an aortic valve stent to solve the technical problem in the prior art that the biological valve cannot continue to work effectively due to the failure of the biological membrane closure because the biological membrane does not meet the replacement standard.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0006] An aortic valve stent, an outflow end, the outflow end comprises a plurality of stent units in a "human" shape, the bottoms of the plurality of stent units are connected to a main frame support body, and the bottom of the main frame support body is connected to an inflow port;

[0007] Wherein, each of the bracket units is connected with the main frame support body to form a mesh formed by an inner bracket, the main frame support body where the inner bracket is located and a ring frame body is arranged along the circumference of the main frame support body, and the top of the inner bracket is connected to the ring frame body;

[0008] Wherein, the inner bracket is located within the curved surface where the mesh is located under the constraint of the ring frame body, and the top of the inner bracket is bent outward and protrudes from the curved surface where the mesh is located when it loses connection with the ring frame body;

[0009] A connector is disposed on the inner side of the top of the inner support, and the connector is used to connect the tops of two adjacent semilunar valve bodies of the aortic valve.

[0010] As a preferred solution of the present invention, the ring frame body has crests and troughs in the circumferential direction of the main frame support body, and the ring frame body is movably connected to the main frame support body at the troughs.

[0011] As a preferred solution of the present invention, a plurality of anchors are arranged on the inner side of the main frame support body, the anchor body extends along the surface of the main frame support body, an anchor groove is formed between the anchor body and the main frame support body, an opening is formed between the bottom of the anchor body and the main frame support body, and the opening is for the ring frame body to enter or leave the anchor groove.

[0012] As a preferred solution of the present invention, the inner support comprises a frame body in the shape of a human figure, and the bottom of the frame body is connected to the main frame support body on the corresponding side of the mesh.

[0013] As a preferred solution of the present invention, the inflow port includes three arc-shaped brackets, the three arc-shaped brackets are evenly distributed at the bottom of the main frame support body, the ends of the arc-shaped brackets are connected to the main frame support body to form a surrounding curved surface, and the surrounding curved surface is filled with a polymer skirt;

[0014] The portion where the arc-shaped bracket is connected to the main frame support body is bent outward.

[0015] As a preferred solution of the present invention, a connecting bracket is provided on the surface of the main frame support body, one end of the connecting bracket is connected to the connecting piece, and the other end of the connecting bracket is connected to the middle of the arc-shaped bracket;

[0016] The connecting bracket passes through the main frame support body by crossing through the hole of the main frame support body.

[0017] As a preferred solution of the present invention, the connector includes a closed hole provided on the inner support, a matching anchor is provided in the closed hole, and the matching anchor connects the top of the connection of two adjacent semilunar valve bodies of the aortic valve.

[0018] As a preferred embodiment of the present invention, a guide member is provided in the mesh, and the guide member is used to converge and guide the top of the connection between two adjacent semilunar valve bodies of the aortic valve during the process of bending outward when the top of the inner stent loses connection with the ring frame body.

[0019] As a preferred embodiment of the present invention, the guide member specifically includes two guide brackets arranged in parallel, a guide groove is formed between the two guide brackets, the top of the guide bracket is connected to the inner top of the mesh, and the bottom of the two guide brackets is open to form a snap-in for the top of the connection between two adjacent semilunar valve bodies of the aortic valve to be snapped into the guide groove.

[0020] As a preferred solution of the present invention, the guide bracket is cylindrical and has an arc shape that bulges toward the inside of the main frame support body.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a removable and releasable inner stent connected to the semilunar valve of the aortic valve on the aortic valve stent, thereby stretching and reshaping the semilunar valve of the aortic valve. The functionality of the aortic valve can be restored when the biological valve has not reached the replacement period or replacement standard, thereby avoiding the need for surgery to replace the entire aortic valve stent again. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the connection between the anchor and the inner support according to an embodiment of the present invention.

[0026] The numbers in the figure represent the following:

[0027] 10-outflow port; 11-support unit; 20-main frame support body; 21-connecting support; 30-inflow port; 31-arc support; 40-mesh; 50-inner support; 60-ring frame body; 70-connecting piece; 71-closing hole; 72-matching anchor; 80-anchor; 90-anchor groove; 100-opening; 110-guide piece; 111-guide support; 112-guide groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] At the beginning of aortic valve replacement surgery, the working environment of the valve in the heart is estimated using the method provided by the present invention. Figure 1 An aortic valve stent is shown, wherein the aortic valve can adopt the existing biological membrane as a whole, and its purpose is:

[0030] By constructing a stent structure that can support the shape of the aortic valve in the initial state, when the biological membrane is stretched and deformed after working for a period of time, causing the closing function to be weakened and the closing to be irregular, the stent structure is released, causing the stent structure to bend outward relative to the biological valve, thereby tightening the stretched biological valve, so that the biological valve can work normally.

[0031] The present invention is based on the existing aortic valve stent, and has an outflow port 10. The outflow port 10 includes a plurality of stent units 11 in a "human" shape, which is not necessarily a "human" shape. The outflow port 10 and the main frame support body 20 as a whole can be a large-aperture mesh structure, and the overall shape can conform to the bionic shape of the existing aortic valve. The bottom of the plurality of stent units 11 is connected to the main frame support body 20, and the bottom of the main frame support body 20 is connected to the inflow port 30.

[0032] Then, when constructing the above-mentioned support structure, specifically, an inner support 50 is arranged in the mesh 40 formed by connecting each support unit 11 and the main frame support body 20, the main frame support body 20 where the inner support 50 is located and a ring frame body 60 is arranged along the circumference of the main frame support body 20, which is specifically a circular ring structure with a circular longitudinal section. The top of the inner support 50 is connected to the ring frame body 60, and the ring frame body 60 is not integrally formed with the inner support 50 or the main frame support body 20 or the outflow port 10, which is convenient for subsequent removal.

[0033] In order to prevent the ring frame body 60 from shaking or moving, the ring frame body 60 adopts a cross-weaving method during weaving.

[0034] The inner support 50 is in an inverted "V" shape as a whole, and has the same number of adjacent connection points as the semilunar valve of the aortic valve, generally three. It is mainly made of memory alloy material, and when it is in the initial state without being subjected to force, the two legs of the inner support 50 are respectively connected to the corresponding sides of the main frame support body 20.

[0035] That is, after the aortic valve is placed and the expansion action is completed, the inner stent 50 as a whole can still be maintained within the curved surface where the aortic valve stent is located and remain consistent.

[0036] When the ring frame body 60 needs to be removed or the ring frame body 60 and the inner stent 50 need to be separated, the inner stent 50 will expand without the restriction of the ring frame body 60. At this time, the three centrally symmetrical inner stents 50 will evenly pull the biofilm radially outward along the main frame support body 20, thereby restoring the state of the bioprosthesis to a tight state by stretching.

[0037] Of course, when the airbag expands the outflow port 10 , the deformation generated at the connection between the outflow port 10 and the main frame support body 20 can create a deformed cavity for the inner support 50 to flow out.

[0038] Furthermore, the inner stent 50 in the present invention is located within the curved surface where the mesh 40 is located under the constraint of the ring frame body 60, that is, when the aortic valve stent is initially installed, the ring frame body 60 needs to be fixedly connected to the top of the inner stent 50, and the top of the inner stent 50 bends outward and protrudes from the curved surface where the mesh 40 is located when the connection with the ring frame body 60 is lost.

[0039] In order to realize the connection between the biofilm and the inner support 50, a connector 70 is provided on the inner side of the top of the inner support 50 in the present invention. The connector 70 is used to connect the tops of two adjacent semilunar valve bodies of the aortic valve.

[0040] The present invention provides a removable and releasable inner support 50 connected to the semilunar valve of the aortic valve on the aortic valve support, that is, the material of the inner support 50 itself supports its re-bending, or the connection between the ring frame body 60 and the inner support 50 limits the outward bending of the inner support 50.

[0041] The semilunar valve of the aortic valve can be stretched and reshaped, and the functionality of the aortic valve can be restored when the biological valve has not reached the replacement period or replacement standard, avoiding the need for surgery to replace the entire aortic valve stent again.

[0042] Specifically, the ring frame body 60 of the present invention has crests and troughs in the circumferential direction of the main frame support body 20, and the troughs of the ring frame body 60 are movably connected to the main frame support body 20, which is also conducive to the axial deformation of the ring frame body 60 when it is converged into the conveying system.

[0043] In the present invention, a plurality of anchors 80 are arranged on the inner side of the main frame support body 20, and the anchor body 80 extends along the surface of the main frame support body 20, and an anchor groove 90 is formed between the anchor body 80 and the main frame support body 20, and an opening 100 is formed between the bottom of the anchor body 80 and the main frame support body 20, and the opening 100 is used for the ring frame body 60 to enter or leave the anchor groove 90. The purpose is to facilitate the ring frame body 60 to enter the anchor groove 90 through the opening 100. It is also convenient for the ring frame body 60 to leave the anchor groove 90, and the overall structure is a smooth arc structure, and will not damage the aortic wall.

[0044] Furthermore, the inner support 50 in the present invention can also be in the shape of a "human" shape, and the bottom of the frame is connected to the main frame support body 20 on the corresponding side of the mesh 40.

[0045] In the present invention, the inflow port 30 includes three arc-shaped brackets 31, which are evenly distributed at the bottom of the main frame support body 20. The ends of the arc-shaped brackets 31 are connected to the main frame support body 20 to form a surrounding curved surface, and the surrounding curved surface is filled with a polymer skirt 32. The part where the arc-shaped bracket 31 is connected to the main frame support body 20 is bent outward.

[0046] Since the skirt of the aortic valve stent and the structure in contact with the aortic wall are also made of polymer materials, when the biomembrane is stretched, leakage between the outer periphery of the bio-valve stent and the aortic wall can be avoided.

[0047] In the present invention, a connecting bracket 21 is provided on the surface of the main frame support body 20, specifically a linear structure, one end of the connecting bracket 21 is connected to the connecting piece 70, and the other end of the connecting bracket 21 is connected to the middle of the arc-shaped bracket 31. The connecting bracket 21 passes through the main frame support body 20 by crossing through the hole of the main frame support body 20. Then, when the inner bracket 50 is released, the connecting bracket 21 connected thereto will be pulled, and when the connecting bracket 21 is connected to the main frame support body 20 by weaving, a pulling force will be generated along the length direction of the connecting bracket 21, thereby further pulling the arc-shaped bracket 31 upward, so that the arc-shaped bracket 31 and the connection part near the ventricle below the valve are in closer contact.

[0048] The present invention provides a specific embodiment of a connecting member 70 including:

[0049] The closing hole 71 provided on the inner support 50 is specifically a ring-shaped member, and a matching anchor 72 is provided in the closing hole 71 . The matching anchor 72 connects the top of the connection of two adjacent semilunar valve bodies of the aortic valve.

[0050] A guide member 110 is provided in the mesh 40, and the guide member 110 is used to converge and guide the top of the connection between two adjacent semilunar valve bodies of the aortic valve during the process of bending outward when the top of the inner support 50 loses connection with the ring frame body 60.

[0051] The guide member 110 specifically includes two guide brackets 111 arranged in parallel. In the present invention, the specific structure of the guide bracket 111 can be designed according to the specific mesh structure of the aortic valve bracket. Of course, the guide bracket 111 is located as a whole in the arc-shaped surface where the mesh is located, which can ensure the flatness of the overall inner surface of the bracket. Of course, it also needs to be kept in the same plane with the inner bracket 50.

[0052] Among them, a guide groove 112 is formed between the two guide brackets 111. Of course, part of the guide groove 112 should be located on the inner side of the main frame support body 20 compared to the inner bracket 50. The top of the guide bracket 111 is connected to the inner top of the mesh 40, and the bottom of the two guide brackets 111 is open to form a snap-in 114 for the top of the connection between the two adjacent semilunar valve bodies of the aortic valve to be snapped into the guide groove 112.

[0053] Furthermore, in the present invention, in order to keep its inner surface facing in safe contact with the membrane surface of the active valve as much as possible, that is, smooth and without damaging the membrane, the guide bracket 111 is cylindrical and in an arc shape that bulges toward the inside of the main frame support body 20. In this way, when the inner bracket 50 is detached from the connection with the ring frame body 60 and stretches the aortic valve, the aortic valve can be prevented from being stretched and damaged.

[0054] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. An aortic valve stent, characterized in that: include, An outflow port (10), the outflow port (10) comprising a plurality of bracket units (11) in a herringbone shape, the bottoms of the plurality of bracket units (11) being connected to a main frame support body (20), the bottom of the main frame support body (20) being connected to an inflow port (30); Wherein, an inner bracket (50) is arranged in a mesh (40) formed by connecting each bracket unit (11) and the main frame support body (20), the main frame support body (20) where the inner bracket (50) is located and a ring frame body (60) is arranged along the circumference of the main frame support body (20), and the top of the inner bracket (50) is connected to the ring frame body (60); The inner bracket (50) is located within the curved surface where the mesh (40) is located under the constraint of the ring frame body (60), and the top of the inner bracket (50) is bent outward and protrudes from the curved surface where the mesh (40) is located when the top of the inner bracket (50) loses connection with the ring frame body (60); A connector (70) is provided on the inner side of the top of the inner support (50), and the connector (70) is used to connect the tops of two adjacent semilunar valve bodies of the aortic valve.

2. An aortic valve stent according to claim 1, characterized in that: The ring frame body (60) has wave crests and wave troughs in the circumferential direction of the main frame support body (20), and the wave troughs of the ring frame body (60) are movably connected to the main frame support body (20).

3. An aortic valve stent according to claim 2, characterized in that: A plurality of anchors (80) are arranged on the inner side of the main frame support body (20), and the anchor body (80) extends along the surface of the main frame support body (20). An anchor groove (90) is formed between the anchor body (80) and the main frame support body (20), and an opening (100) is formed between the bottom of the anchor body (80) and the main frame support body (20), and the opening (100) allows the ring frame body (60) to enter or leave the anchor groove (90).

4. An aortic valve stent according to claim 3, characterized in that: The inner support (50) comprises a frame body in the shape of a human figure, the bottom of the frame body being connected to the main frame support body (20) on the corresponding side of the mesh (40).

5. The aortic valve stent according to claim 4, characterized in that: The inflow port (30) comprises three arc-shaped brackets (31), the three arc-shaped brackets (31) are evenly distributed at the bottom of the main frame support body (20), the ends of the arc-shaped brackets (31) are connected to the main frame support body (20) to form a surrounding curved surface, and the surrounding curved surface is filled with a polymer skirt (32); The portion where the arc-shaped bracket (31) is connected to the main frame support body (20) is bent outward.

6. The aortic valve stent according to claim 5, characterized in that: A connecting bracket (21) is provided on the surface of the main frame support body (20), one end of the connecting bracket (21) is connected to the connecting piece (70), and the other end of the connecting bracket (21) is connected to the middle of the arc-shaped bracket (31); The connecting bracket (21) passes through the main frame support body (20) by crossing through the hole of the main frame support body (20).

7. The aortic valve stent according to claim 6, characterized in that: The connecting member (70) comprises a closed hole (71) arranged on the inner support (50), a matching anchor (72) is arranged in the closed hole (71), and the matching anchor (72) connects the top of the connection between two adjacent semilunar valve bodies of the aortic valve.

8. The aortic valve stent according to claim 7, characterized in that: A guide member (110) is provided in the mesh (40), and the guide member (110) is used to converge and guide the top of the connection between two adjacent semilunar valve bodies of the aortic valve during the process of outward bending when the top of the inner support (50) loses connection with the ring frame body (60).

9. The aortic valve stent according to claim 8, characterized in that: The guide member (110) specifically comprises two guide brackets (111) arranged in parallel, a guide groove (112) is formed between the two guide brackets (111), the top of the guide bracket (111) is connected to the inner top of the mesh (40), and the bottoms of the two guide brackets (111) are open to form a snap-in (114) for the top of the connection between two adjacent semilunar valve bodies of the aortic valve to be snapped into the guide groove (112).

10. The aortic valve stent according to claim 9, characterized in that: The guide bracket (111) is cylindrical and has an arc shape that bulges toward the inside of the main frame support body (20).

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