A strong ductility spring support for heart valve

Abstract

The application relates to the technical field of heart valve stents, in particular to a spring stent with high ductility for a heart valve, which comprises combined frames, the combined frames comprise main stents, auxiliary stents and connecting frames, a sliding groove is formed in the main stent, one end of the auxiliary stent is slidably arranged in the sliding groove, one end of the connecting frame is fixedly connected to the other end of the auxiliary stent, a plurality of combined frames are connected in sequence to form a combined frame with a prismatic grid, and the combined frames are connected to each other to form a cylindrical ring structure, so that the heart valve stent can be transported in a smaller size, blood vessels are prevented from being damaged in the transportation process, the difficulty of operation is reduced, and the adhesion of the heart valve stent to the tissue around the heart valve is improved; the problem that the heart valve stent is difficult to transport and inconvenient to operate is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heart valve stent, in particular to a spring stent with strong ductility for heart valve. BACKGROUND

[0002] The existing heart valve stent installation is that a puncture needle first punctures the radial artery or the femoral artery in the inner side of the thigh, then a relatively soft guide wire is put into the blood vessel along the puncture needle and the puncture needle is withdrawn, and then a sheath tube and a heart valve stent are put into the blood vessel along the guide wire and enter the diseased heart valve along the blood vessel and the guide wire. Since the blood vessel path is narrow and winding, the diameter of the sheath tube is larger than that of the guide wire, and if the doctor forces or operates improperly, the sheath tube and the heart valve stent can easily cause friction or scratch in the blood vessel, and even cause bleeding, and in severe cases, can cause hematoma, hypotension and even shock, which can endanger life. If it happens in the blood vessel near the important organs, it can also cause serious complications such as organ bleeding.

[0003] Therefore, the present application provides a spring stent with strong ductility for heart valve to solve the above problems. SUMMARY

[0004] The technical problem to be solved by the present application is that the existing heart valve stent delivery is difficult and inconvenient to operate.

[0005] The present application provides the following technical scheme: a spring stent with strong ductility for heart valve, comprising a main stent and an auxiliary stent; a sliding groove is formed in the main stent, and the auxiliary stent is slidably installed in the sliding groove; a fixed body is fixedly installed on the opposite surface of the main stent and the auxiliary stent; one end of the fixed body is a fixed end, and the other end of the fixed body is a free end; the fixed body is inclinedly installed, and the directions of the fixed end and the free end of the two fixed bodies on the opposite surface are opposite; and a spring spiral segment is fixedly connected in the main stent and the auxiliary stent.

[0006] A pad body is fixedly installed below the fixed body.

[0007] A plurality of fixed bodies are spaced apart.

[0008] A convex body is arranged on the side of the fixed body close to the main stent or the auxiliary stent.

[0009] A clamping groove is formed on the surface of the auxiliary stent, one end of a clamping block is fixedly installed in the main stent, the other end of the clamping block is a free end, and a pad body is fixedly installed below the clamping block.

[0010] The beneficial effects of the present application are as follows:

[0011] 1. The heart valve stent can be transported in a smaller size by the cooperation of the main support, the auxiliary support, the spring spiral section and the bending section, so as to avoid damaging the blood vessel during transportation, reduce the difficulty of operation, and better fit the tissue around the heart valve, thereby reducing the difficulty of operation and improving the fit of the heart valve stent and the tissue around the heart valve.

[0012] 2. The cooperation of the fixed body, the spring spiral section and the bending section can make the main support and the auxiliary support fit the tissue around the heart valve and follow the beating of the heart to change synchronously and dynamically after expansion, thereby improving the extensibility of the stent as a whole and further improving the fit of the stent and the tissue around the heart valve. BRIEF DESCRIPTION OF DRAWINGS

[0013] 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 the 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 be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0014] Figure 1 It is the overall schematic diagram of the present application;

[0015] Figure 2 It is the overall schematic diagram of the present application Figure 1 It is the enlarged structure schematic diagram of A in the present application;

[0016] Figure 3 It is the structure schematic diagram of the combined frame of the present application;

[0017] Figure 4 It is the structure schematic diagram of the auxiliary support completely located in the main support of the present application;

[0018] Figure 5 It is the structure schematic diagram of the auxiliary support after sliding out of the main support and the adjacent fixed bodies being inserted into each other.

[0019] In the figure: 1, main support; 11, sliding groove; 111, limiting body; 112, limiting body; 2, auxiliary support; 3, connecting frame; 31, bending section; 4, combined frame; 5, fixed body; 51, fixed end; 52, free end; 6, pad; 7, spring spiral section. DETAILED DESCRIPTION

[0020] 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 the present application.

[0021] It should be noted that similar reference numerals and letters refer to like items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0022] 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.

[0023] 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, or it can be connected 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.

[0024] The embodiments of the present disclosure aim to solve the problems of large difficulty and inconvenient operation of existing heart valve stent delivery. Therefore, the present disclosure provides a strong ductility spring stent for heart valve, which comprises a main stent 1, an auxiliary stent 2 and a connecting frame 3; the main stent 1 is provided with a sliding groove 11, one end of the auxiliary stent 2 is slidably installed in the sliding groove 11, and one end of the connecting frame 3 is fixedly connected to the other end of the auxiliary stent 2; four combined frames 4 are connected in sequence to form a combined frame 4 with a prismatic grid, and a plurality of combined frames 4 are connected to each other to form a cylindrical ring structure heart valve stent.

[0025] The main support 1 and the auxiliary support 2 are fixedly installed with the fixed body 5 on the opposite surfaces, one end of the fixed body 5 is fixedly installed with the fixed end 51, the other end of the fixed body 5 is not fixed with the free end 52, and the fixed body 5 is installed in an inclined manner, and the directions of the fixed end 51 and the free end 52 of the two fixed bodies 5 on the opposite surfaces are opposite.

[0026] It should be noted that the fixed body 5 fixedly installed on the surface of the main support 1 forms an angle with the main support 1, and the fixed body 5 fixedly installed on the surface of the auxiliary support 2 forms an angle with the auxiliary support 2.

[0027] The existing heart valve support is transported by a guide wire, and then a balloon expands to support the support, so that the support structure in the support is constantly stretched and expanded, and then the support gradually adheres to the tissue around the heart valve. However, the existing heart valve support is a grid structure, and the grid structure has poor extension performance, and the improvement of the extension performance depends more on the improvement of the material.

[0028] After the heart valve is transported to the predetermined position by the guide wire, the balloon drives the main support 1 and the auxiliary support 2 in the embodiment of the present disclosure to expand and adhere to the heart at the same time. In the process of expansion of the main support 1 and the auxiliary support 2, the auxiliary support 2 in the sliding groove 11 of the main support 1 slides away from the main support 1, and drives the fixed end 51 of the fixed body 5 to move towards the free end 52, so that the fixed end 51 of the fixed body 5 presses and passes the free end 52. After the balloon drives the main support 1 and the auxiliary support 2 to expand at the same time, the balloon shrinks, and the fixed ends 51 of the adjacent fixed bodies 5 relatively approach, so that the fixed ends 51 are inserted into the free ends 52 of the adjacent fixed bodies 5 and move along the free ends 52 of the adjacent fixed bodies 5 towards the fixed ends 51, so that the adjacent fixed bodies 5 can be inserted into each other, so that after the balloon drives the auxiliary support 2 to slide relative to the main support 1 to expand, the auxiliary support 2 can be relatively fixed with the main support 1 to prevent the auxiliary support 2 from retracting into the main support 1 after expansion.

[0029] The adjacent fixed bodies 5 in the present disclosure can still move relatively after being inserted into each other, that is, in the process of the main support 1 and the auxiliary support 2 adhering to the tissue around the heart valve and following the beating of the heart to change synchronously, the main support 1 and the auxiliary support 2 can slide relatively, so as to drive the adjacent fixed bodies 5 to move relatively. It should be noted that the adjacent fixed bodies 5 move relatively and do not separate from each other, that is, the moving distance of the fixed body 5 in the adjacent fixed body 5 can match the distance of the dynamic movement of the main support 1 and the auxiliary support 2 driven by the beating of the heart.

[0030] The fixed body 5 is fixedly installed below a pad body 6. The pad body 6 is used to support the fixed body 5, so as to ensure that the fixed body 5 can keep an inclined state, thereby facilitating the stable mutual insertion of adjacent fixed bodies 5. When the auxiliary support 2 is located in the main support 1 and drives the fixed end 51 of the fixed body 5 to pass the free end 52, the fixed end 51 will press the free end 52, and after the fixed end 51 passes the free end 52, the pad body 6 can provide the fixed body 5 with elastic restoring force, so that the adjacent fixed bodies 5 can keep an inclined state and be inserted into each other.

[0031] It should be noted that in the process of sliding out of the auxiliary support 2, the adjacent fixed bodies 5 have the same inclination angle, and the free end 52 first contacts the fixed end 51 of the adjacent fixed body 5 and then contacts the free end 52, so that in the process of sliding out, the adjacent fixed bodies 5 will not be stuck.

[0032] In the embodiment of the disclosure, the pad body 6 is made of nickel-titanium alloy material, and can also be made of medical silicone rubber material and other materials that can be implanted in the human body and have elasticity.

[0033] The fixed bodies 5 are spaced apart and fixed, and the mutual insertion of the plurality of fixed bodies 5 can improve the stability between the main support 1 and the auxiliary support 2, and further avoid the retraction of the auxiliary support 2 into the main support 1 after expansion. It should be noted that the spacing of the fixed bodies 5 on the surface of the same main support 1 or auxiliary support 2 should meet the moving distance, so as to avoid interference between adjacent fixed bodies 5 when moving.

[0034] The auxiliary support 2 and the connecting frame 3 are fixedly connected with a spring spiral segment 7. After the balloon drives the auxiliary support 2 to slide in the main support 1 and makes the adjacent fixed bodies 5 inserted into each other, the main and auxiliary valve bodies continue to expand and pull the spring connection segment, so that the spring connection segment is stretched, that is, the pitch of the spiral structure of the spring connection segment is increased, and then the spring connection segment can have high ductility through the spring spiral structure.

[0035] At the same time, in the process of the main support 1 and the auxiliary support 2 adhering to the tissue around the heart valve and following the beating of the heart to change dynamically, in the process of the main support 1 and the auxiliary support 2 following the expansion of the heart to contract, the spring connection segment can restore, that is, the pitch of the spiral structure of the spring connection segment is restored.

[0036] The spring connection segment improves the ductility through the stretching of the spring spiral structure, so as to improve the dynamic change distance of the main support 1 and the auxiliary support 2, and thereby better adhere to the change of the beating of the heart.

[0037] The mutual cooperation of the main support 1, the auxiliary support 2, the connecting support 3, the fixing body 5, the cushion body 6 and the spring spiral section 7 can ensure that the size of the support does not change after expansion and is attached to the tissue around the heart valve, and the support can be transported in a smaller size in the uninstalled state, thereby avoiding damage to the blood vessel during transportation and reducing the difficulty of operation. In addition, the auxiliary support 2 is slidably connected with the fixing body 5 and the sliding limit of the cushion body 6, and the stretching of the spring spiral section 7 can make the support change dynamically with the beating of the heart, improve the extensibility of the support, and better attach the support to the tissue around the heart valve, thereby reducing the difficulty of operation and improving the attachment of the heart valve support to the tissue around the heart valve.

[0038] The connecting support 3 is provided with a bending section 31. During the expansion of the balloon to drive the main support 1, the auxiliary support 2 and the connecting support 3 to attach to the tissue around the heart valve, and during the dynamic change of the main support 1, the auxiliary support 2, the connecting support 3 and the spring spiral section 7 following the beating of the heart, the bending section 31 can be stretched to cooperate with the main support 1, the auxiliary support 2, the connecting support 3 and the spring spiral section 7, thereby further improving the extensibility of the support, further reducing the size of the support while ensuring the expansion size, facilitating transportation and reducing the difficulty of operation.

[0039] The sliding groove 11 is fixedly installed with a limiting body 111 near the spring spiral section 7, and the auxiliary support 2 is fixedly installed with a limiting body 112 between the fixing body 5 and the spring spiral section 7. The limiting body 111 is used to block the limiting body 112, thereby preventing the auxiliary support 2 from sliding out of the main support 1 due to excessive expansion size during the expansion of the balloon to drive the main support 1, the auxiliary support 2 and the connecting support 3 to attach to the tissue around the heart valve, and ensuring the sliding stability between the auxiliary support 2 and the main support 1.

[0040] In the embodiment, after the main support 1 and the auxiliary support 2 are transported to the predetermined position by the guide wire, the balloon expands and drives the auxiliary support 2 to slide in the main support 1 away from the main support 1, so that the fixed end 51 of the fixing body 5 presses and passes the free end 52 of the adjacent fixing body 5. After the balloon drives the main support 1 and the auxiliary support 2 to expand and attach to the tissue around the heart valve, the balloon is deflated, so that the fixed end 51 of the adjacent fixing body 5 is relatively close, so that the fixed end 51 is inserted into the free end 52 of the adjacent fixing body 5, and the adjacent fixing bodies 5 are inserted into each other, preventing the auxiliary support 2 from retracting into the main support 1 after expansion. After the fixed end 51 passes the free end 52 of the adjacent fixing body 5, the cushion body 6 can ensure that the free end 52 of the adjacent fixing body 5 restores to the inclined state, thereby facilitating the insertion of the adjacent fixing bodies 5 into each other.

[0041] Meanwhile, after the balloon drives the auxiliary stent 2 to slide in the main stent 1 and makes the adjacent fixed bodies 5 insert into each other, the main and auxiliary leaflets continue to expand and drive the spring connecting section to stretch, so that the stent is better attached to the tissue around the heart valve. And, while the spring connecting section is stretched, the bending section 31 is synchronously stretched, further improving the extensibility of the stent, so that the stent is better attached to the tissue around the heart valve.

[0042] After the stent is installed, during the beating of the heart, the adjacent fixed bodies 5 can slightly move relative to each other and pull the spring connecting section and the bending section 31 to stretch, further improving the extensibility of the stent, so that the stent is better attached to the tissue around the heart valve, and further ensuring that the main stent 1 and the auxiliary stent 2 can be attached to the tissue around the heart valve and synchronously dynamically move with the beating of the heart.

[0043] Through the cooperation of the main stent 1, the auxiliary stent 2, the connecting frame 3, the fixed body 5, the pad 6 and the spring helical section 7, the stent can be transported in a smaller size in an uninstalled state on the basis of ensuring that the size of the stent does not change after expansion and is attached to the tissue around the heart valve, so as to avoid damaging the blood vessel when the stent is transported, and reduce the difficulty of operation. And, the auxiliary stent 2 slides in the main stent 1, cooperates with the sliding restriction of the fixed body 5 and the pad 6, and further cooperates with the stretching of the spring helical section 7, so that the stent can more easily change dynamically with the beating of the heart, improve the extensibility of the stent, and better attach the stent to the tissue around the heart valve, thereby reducing the difficulty of operation and improving the attachment of the heart valve stent to the tissue around the heart valve.

[0044] Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A spring stent for a heart valve with high ductility, comprising a combined stent (4), the combined stent (4) comprising a main stent (1), an auxiliary stent (2) and a connecting stent (3); characterized in that, The main support (1) is provided with a sliding groove (11), one end of the auxiliary support (2) is slidably installed in the sliding groove (11), one end of the auxiliary support (2) is fixedly connected with one end of the connecting frame (3), four combined frames (4) are connected in series to form a rhombic grid structure, and a plurality of combined frames (4) are connected to form a cylindrical ring structure. The upper and lower opposite surfaces of the main support (1) and the auxiliary support (2) are fixedly installed with fixed bodies (5) at any end, one end of the fixed body (5) is a fixedly installed fixed end (51), the other end of the fixed body (5) is a free end (52) without fixation, the fixed body (5) is installed in an inclined manner, and the directions of the fixed end (51) and the free end (52) of the two fixed bodies (5) on the opposite surfaces are opposite. The auxiliary support (2) and the connecting frame (3) are fixedly connected with a spring spiral section (7). The connecting frame (3) is provided with a bending section (31) on the surface.

2. The spring stent for a cardiac valve with high ductility according to claim 1, characterized in that: The fixed body (5) is fixedly installed with a pad body (6) below.

3. The spring stent for a cardiac valve with high ductility according to claim 2, characterized in that: The sliding groove (11) is fixedly installed with a limiting body (111) close to the spring spiral section (7), and the limiting body (112) is fixedly installed between the fixed body on the surface of the auxiliary support (2) and the spring spiral section (7).

4. The spring stent for a cardiac valve with high ductility according to claim 3, characterized in that: The fixed bodies (5) fixedly installed on the upper and lower opposite surfaces of the main support (1) and the auxiliary support (2) are all spaced apart and fixed with a plurality of.

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