Strong-ductility spring support for heart valve

Abstract

The invention relates to the technical field of heart valve stents, in particular to a high-ductility spring stent for a heart valve, which comprises a combined frame, the combined frame comprises a main stent, an auxiliary stent and a connecting frame, a sliding groove is formed in the main stent, and one end of the auxiliary stent is slidably mounted in the sliding groove; the other end of the auxiliary stent is fixedly connected with one end of a connecting frame, a plurality of combined frames are connected end to end to form a combined frame with a prismatic grid, and the combined frames are mutually connected to form a cylindrical ring structure, so that the heart valve stent can be conveyed in a smaller size, and blood vessels are prevented from being damaged in the conveying process; the difficulty of surgical operation is reduced, and the fitness of the heart valve stent and the surrounding tissue of the heart valve is improved; the problems that the heart valve stent is difficult to convey and inconvenient to operate are solved.

Description

Technical Field

[0001] The invention relates to the technical field of heart valve stents, and in particular to a spring stent for a heart valve with strong ductility. Background Art

[0002] The existing heart valve stent installation is to first puncture the radial artery or the femoral artery on the inner thigh with a puncture needle, then insert the overall softer guide wire into the blood vessel along the puncture needle and withdraw the puncture needle, then insert the sheath and heart valve stent into the blood vessel along the guide wire, and enter the diseased heart valve along the blood vessel and the guide wire. However, due to the narrow and tortuous blood vessel path, and the diameter of the sheath is larger than the guide wire, if the doctor uses force or operates improperly, it is very easy to cause the sheath and its heart valve stent to cause friction or scratches on the blood vessel, or even puncture the blood vessel to cause bleeding, which can cause hematoma, hypotension, or even shock and other life-threatening conditions in severe cases. If it occurs in the blood vessels near important organs, it will also cause serious complications such as organ bleeding.

[0003] Therefore, the present invention provides a spring support for a heart valve with strong ductility to solve the above problems. Summary of the invention

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

[0005] The present invention provides the following technical solution: a spring support for a heart valve with strong ductility, comprising a main support and an auxiliary support; a sliding groove is provided in the main support, and an auxiliary support is slidably installed in the sliding groove; opposite surfaces of the main support and the auxiliary support are fixedly installed with either end of a fixed body, one end of the fixed body is a fixed end that is fixedly installed, and the other end of the fixed body is a free end that is not fixed; the fixed body is installed at an angle, and the fixed ends and free ends of the two fixed bodies on the opposite surfaces are in opposite directions; and spring spiral segments are fixedly connected in the main support and the auxiliary support.

[0006] A cushion body is fixedly installed under the fixed body.

[0007] A plurality of the fixing bodies are fixed at intervals.

[0008] The fixing body is provided with a convex body on the side close to the main support or the auxiliary support.

[0009] A card slot is provided on the surface of the auxiliary bracket, one end of a card block is fixedly installed inside the main bracket, the other end of the card block is a free end without a fixed end, and a cushion body is fixedly installed under the card block.

[0010] The beneficial effects of the present invention are as follows: 1. The present invention enables the heart valve stent to be delivered in a smaller size through the mutual cooperation of the main stent, the auxiliary stent, the spring spiral segment and the bent segment, thereby avoiding damage to blood vessels during delivery, reducing the difficulty of surgical operation, and being able to better fit the tissue around the heart valve, thereby reducing the difficulty of surgical operation and improving the fit between the heart valve stent and the tissue around the heart valve.

[0011] 2. The present invention can make the main stent and the auxiliary stent fit the tissue around the heart valve more easily and stably after expansion through the mutual cooperation of the fixed body, the spring spiral segment and the bending segment, and perform synchronous dynamic changes with the beating of the heart, thereby improving the overall ductility of the stent and further improving the fit between the stent and the tissue around the heart valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle; Figure 3 It is a structural schematic diagram of the combined frame of the present invention; Figure 4 This is a schematic diagram of the structure in which the auxiliary support of the present invention is completely located inside the main support; Figure 5 It is a structural schematic diagram of the adjacent fixing bodies being plugged into each other after the auxiliary bracket of the present invention slides out of the main bracket.

[0014] In the figure: 1, main bracket; 11, sliding groove; 111, limiting body; 112, limiting body; 2, auxiliary bracket; 3, connecting frame; 31, bending section; 4, combined frame; 5, fixed body; 51, fixed end; 52, free end; 6, cushion body; 7, spring spiral section. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] The disclosed embodiment aims to solve the problem that the existing heart valve stents are difficult to transport and inconvenient to operate. In view of this, the disclosed embodiment proposes a spring stent for a heart valve with strong ductility, including 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 the other end of the auxiliary stent 2 is fixedly connected to one end of the connecting frame 3, and four combination frames 4 are connected in the first position to form a combination frame 4 with a prismatic grid, and a plurality of the combination frames 4 are connected to each other to form a heart valve stent with a cylindrical ring structure.

[0020] The upper and lower opposite surfaces of the main bracket 1 and the auxiliary bracket 2 are fixedly installed with either end of a fixed body 5, one end of the fixed body 5 is a fixed end 51, and the other end of the fixed body 5 is a free end 52. The fixed body 5 is installed at an angle, and the fixed ends 51 and free ends 52 of the fixed body 5 on the two opposite surfaces are in opposite directions.

[0021] It should be noted that the fixing body 5 fixedly installed on the surface of the main bracket 1 forms an angle with the main bracket 1 , and the fixing body 5 fixedly installed on the surface of the auxiliary bracket 2 forms an angle with the auxiliary bracket 2 .

[0022] The existing heart valve stent is delivered by a guide wire, and then the balloon is inflated to expand the stent, so that the support structure inside the stent is continuously stretched and expanded, that is, continuously extended, so that the stent gradually fits the tissue around the heart valve. However, the existing heart valve stent is a grid structure, and the grid structure of the heart valve itself has poor ductility. Improving the ductility depends more on the improvement of materials.

[0023] After the heart valve is delivered to a predetermined position by the guide wire, the balloon drives the main stent 1 and the auxiliary stent 2 in the disclosed embodiment to expand synchronously to fit the heart. During the expansion of the main stent 1 and the auxiliary stent 2, the auxiliary stent 2 is located in the sliding groove 11 in the main stent 1 and slides in a direction away from the main stent 1, and drives the fixed end 51 of the fixed body 5 to move toward the free end 52, so that the fixed end 51 of the fixed body 5 presses the free end 52 and passes over the free end 52. After the balloon drives the main stent 1 and the auxiliary stent 2 to expand synchronously, the balloon contracts, and the fixed ends 51 of adjacent fixed bodies 5 are relatively close, so that the fixed end 51 is inserted into the free end 52 of the adjacent fixed body 5, and moves along the free end 52 of the adjacent fixed body 5 toward the fixed end 51, so that the adjacent fixed bodies 5 can be plugged into each other, thereby ensuring that after the balloon drives the auxiliary stent 2 to slide relative to the main stent 1 for expansion, the auxiliary stent 2 and the main stent 1 can be relatively fixed, preventing the auxiliary stent 2 from retracting into the main stent 1 after expansion.

[0024] The adjacent fixed bodies 5 in the present disclosure can still move relative to each other after being plugged into each other, that is, in the embodiment of the present disclosure, when the main stent 1 and the auxiliary stent 2 fit the tissue around the heart valve and perform synchronous dynamic changes following the beating of the heart, the main stent 1 and the auxiliary stent 2 can slide relative to each other, thereby driving the adjacent fixed bodies 5 to move relative to each other. It should be noted that the adjacent fixed bodies 5 will not be separated from each other when they move relative to 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 stent 1 and the auxiliary stent 2 driven by the beating of the heart.

[0025] A cushion body 6 is fixedly installed under the fixed body 5. The cushion body 6 is used to support the fixed body 5, so as to ensure that the fixed body 5 can maintain an inclined state, and then facilitate the stable insertion of adjacent fixed bodies 5. When the auxiliary bracket 2 slides in the main bracket 1 and drives the fixed end 51 of the fixed body 5 to pass over the free end 52, the fixed end 51 will compress the free end 52. After the fixed end 51 passes over the free end 52, the cushion body 6 can provide elastic restoring force for the fixed body 5, so that adjacent fixed bodies 5 can maintain an inclined state and be inserted into each other.

[0026] It should be noted that, when the auxiliary bracket 2 slides outward, the adjacent fixing bodies 5 have the same inclination angle and the free end 52 first contacts the fixing end 51 of the adjacent fixing body 5 and then contacts the free end 52 . Therefore, the adjacent fixing bodies 5 will not get stuck during the sliding process.

[0027] The pad body 6 in the disclosed embodiment is made of nickel-titanium alloy, and can also be made of medical silicone rubber, or other elastic materials that can be implanted in the human body.

[0028] There are multiple fixed bodies 5 fixed at intervals, and multiple fixed bodies 5 are plugged into each other to improve the stability between the main stent 1 and the auxiliary stent 2, and further prevent the auxiliary stent 2 from retracting into the main stent 1 after expansion. It should be noted that the intervals between the fixed bodies 5 on the surface of the same main stent 1 or auxiliary stent 2 should meet their moving distances to avoid interference between adjacent fixed bodies 5 and other fixed bodies 5 when they move.

[0029] A spring spiral segment 7 is fixedly connected between the auxiliary stent 2 and the connecting frame 3. After the balloon drives the auxiliary stent 2 to slide in the main stent 1 and the adjacent fixing bodies 5 are inserted into each other, the main valve body and the auxiliary valve body continue to expand and pull the spring connecting segment, so that the spring connecting segment is stretched, that is, the pitch of the spiral structure of the spring connecting segment increases, and then the spring connecting segment can be extended through the high ductility of its own spring spiral structure.

[0030] At the same time, in the process that the main stent 1 and the auxiliary stent 2 fit the tissue around the heart valve and undergo synchronous dynamic changes following the beating of the heart, and in the process that the main stent 1 and the auxiliary stent 2 contract after following the expansion of the heart, the spring connecting segment can be restored, that is, the pitch in the spiral structure of the spring connecting segment is restored.

[0031] The spring connecting section improves the ductility by stretching its own spring spiral structure, thereby increasing the dynamic change distance of the main support 1 and the auxiliary support 2, and thus being able to better fit the changes in heartbeat.

[0032] The main stent 1, the auxiliary stent 2, the connecting frame 3, the fixing body 5, the cushion body 6 and the spring spiral segment 7 can cooperate with each other to ensure that the size of the stent remains unchanged after expansion and fits the tissue around the heart valve, so that the stent can be transported in a smaller size when not installed, thereby avoiding the stent from damaging the blood vessels during transportation and reducing the difficulty of surgical operation. In addition, the auxiliary stent 2 slides in the main stent 1 to cooperate with the sliding restrictions of the fixing body 5 and the cushion body 6, and in combination with the stretching of the spring spiral segment 7, the stent can more easily change dynamically with the beating of the heart, improve the ductility of the stent, and enable the stent to better fit the tissue around the heart valve, thereby reducing the difficulty of surgical operation and improving the fit between the heart valve stent and the tissue around the heart valve.

[0033] The surface of the connecting frame 3 is provided with a bending section 31. In the process of the balloon driving the main stent 1, the auxiliary stent 2 and the connecting frame 3 to expand and fit the tissue around the heart valve, and in the process of the main stent 1, the auxiliary stent 2, the connecting frame 3 and the spring spiral section 7 to dynamically change with the heart beating, the bending section 31 can cooperate to stretch and cooperate with the main stent 1, the auxiliary stent 2, the connecting frame 3 and the spring spiral section 7, thereby further improving the ductility of the stent, and further reducing the volume of the stent when it is not installed while ensuring the expanded size of the stent, so as to facilitate transportation and reduce the difficulty of surgical operation.

[0034] The sliding groove 11 is fixedly installed with a limiting body 111 near the spring spiral segment 7, and a limiting body 112 is fixedly installed between the fixing body 5 on the surface of the auxiliary stent 2 and the spring spiral segment 7. The limiting body 111 is used to block the limiting body 112, so as to prevent the auxiliary stent 2 from sliding out of the main stent 1 due to excessive expansion size when the balloon drives the main stent 1, the auxiliary stent 2 and the connecting frame 3 to expand and fit the tissue around the heart valve, thereby ensuring the sliding stability between the auxiliary stent 2 and the main stent 1.

[0035] In this embodiment, after the main stent 1 and the auxiliary stent 2 are transported to the predetermined position by the guide wire, the balloon expands and drives the auxiliary stent 2 located in the main stent 1 to slide in the direction away from the main stent 1, so that the fixed end 51 of the fixed body 5 presses the free end 52 of the adjacent fixed body 5 and passes over the free end 52. After the balloon drives the main stent 1 and the auxiliary stent 2 to expand and fit the tissue near the heart valve, the balloon contracts, so that the fixed ends 51 of the adjacent fixed bodies 5 are relatively close, so that the fixed ends 51 are inserted into the free ends 52 of the adjacent fixed bodies 5, and then the adjacent fixed bodies 5 are plugged into each other to prevent the auxiliary stent 2 from retracting into the main stent 1 after expansion. After the fixed end 51 passes over the free end 52 of the adjacent fixed body 5, the cushion body 6 can ensure that the free end 52 of the adjacent fixed body 5 is restored to an inclined state, so as to facilitate the plugging of the adjacent fixed bodies 5.

[0036] At the same time, after the balloon drives the auxiliary stent 2 to slide in the main stent 1 and inserts the adjacent fixing bodies 5 into each other, the main valve body and the auxiliary valve body continue to expand and drive the spring connecting section to stretch, so that the stent better fits the tissue around the heart valve. In addition, while the spring connecting section is stretched, the bending section 31 is stretched synchronously, further improving the ductility of the stent, so that the stent better fits the tissue around the heart valve.

[0037] After the stent is installed, during the beating of the heart, adjacent fixed bodies 5 can perform slight relative movement while being plugged into each other and pull the spring connecting section and the bending section 31 to stretch, thereby further improving the ductility of the stent so that it can better fit the tissue around the heart valve, and further ensuring that the main stent 1 and the auxiliary stent 2 can fit the tissue around the heart valve and perform synchronous dynamic movement following the beating of the heart.

[0038] The main stent 1, the auxiliary stent 2, the connecting frame 3, the fixing body 5, the cushion body 6 and the spring spiral segment 7 can cooperate with each other to ensure that the size of the stent remains unchanged after expansion and fits the tissue around the heart valve, so that the stent can be transported in a smaller size when not installed, thereby avoiding the stent from damaging the blood vessels during transportation and reducing the difficulty of surgical operation. In addition, the auxiliary stent 2 slides in the main stent 1 to cooperate with the sliding restrictions of the fixing body 5 and the cushion body 6, and in combination with the stretching of the spring spiral segment 7, the stent can more easily change dynamically with the beating of the heart, improve the ductility of the stent, and enable the stent to better fit the tissue around the heart valve, thereby reducing the difficulty of surgical operation and improving the fit between the heart valve stent and the tissue around the heart valve.

[0039] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A spring support for a heart valve with high ductility, comprising a combined frame (4), wherein the combined frame (4) comprises a main frame (1), an auxiliary frame (2) and a connecting frame (3); characterized in that: The main support (1) is provided with a sliding groove (11), one end of the auxiliary support (2) is slidably mounted in the sliding groove (11), the other end of the auxiliary support (2) is fixedly connected to one end of a connecting frame (3), a plurality of combined frames (4) are connected in the first position to form a combined frame (4) having a prismatic grid, and the combined frames (4) are connected to each other to form a cylindrical ring structure.

2. A spring support for a heart valve with strong ductility according to claim 1, characterized in that: The upper and lower opposite surfaces of the main bracket (1) and the auxiliary bracket (2) are both fixedly mounted with either end of a fixed body (5), one end of the fixed body (5) is a fixed end (51) that is fixedly mounted, and the other end of the fixed body (5) is a free end (52) that is not fixed, the fixed body (5) is installed in an inclined manner, and the fixed ends (51) and free ends (52) of the two opposite surfaces of the fixed body (5) are in opposite directions.

3. A spring support for a heart valve with strong ductility according to claim 2, characterized in that: A cushion body (6) is fixedly mounted below the fixed body (5).

4. A spring support for a heart valve with strong ductility according to claim 3, characterized in that: A spring spiral section (7) is fixedly connected between the auxiliary bracket (2) and the connecting frame (3).

5. The spring support for a heart valve with high ductility according to claim 4, characterized in that: The surface of the connecting frame (3) is provided with a bending section (31).

6. The spring support for a heart valve with high ductility according to claim 5, characterized in that: A limiting body (111) is fixedly installed on the sliding groove (11) near the spring spiral section (7), and a limiting body (112) is fixedly installed between the fixed body on the surface of the auxiliary bracket (2) and the spring spiral section (7).

7. A spring support for a heart valve with strong ductility according to claim 6, characterized in that: A plurality of the fixing bodies (5) are fixed at intervals.

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