A circumferential locking structure for a mitral valve annuloplasty ring

Abstract

This invention discloses a mitral valve annuloplasty ring locking structure, comprising an annuloplasty ring body, including at least two metal strips, end metal tubes sleeved at the ends of the metal strips, and a connecting metal tube sleeved between two adjacent metal strips; the two end metal tubes are connected by a snap-fit ​​assembly so that the annuloplasty ring body is joined end to end to form a ring structure; one end of each of the two adjacent metal strips is inserted into the inner cavity of the connecting metal tube; the inner walls of the metal strips and the connecting metal tube are connected by the mitral valve annuloplasty locking structure. By providing at least two metal strips, end metal tubes sleeved at the ends of the metal strips, and a connecting metal tube sleeved between two adjacent metal strips, with the ends of the two adjacent metal strips furthest from the end metal tubes inserted into the inner cavity of the connecting metal tube, the size of the annuloplasty ring body can be adjusted by adjusting the length of the metal strips inserted into the connecting metal tube, thereby achieving the function of individually shrinking the annuloplasty ring body.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and specifically to a mitral valve annuloplasty ring locking structure. Background Technology

[0002] Mitral valve repair surgery treats mitral regurgitation caused by implanting an artificial mitral valve annulus. The artificial mitral valve annulus is used as part of the mitral valve repair procedure to assist in the correction of heart valve defects such as mitral regurgitation. The mitral valve consists of the mitral valve annulus, leaflets, papillary muscles, and chordae tendineae. Mitral regurgitation is the backflow of blood from the left ventricle through the mitral valve to the left atrium when the left ventricle contracts. Dilation of the mitral valve annulus impedes the valve's ability to function, resulting in a distortion of the valve's normal shape.

[0003] For the surgical treatment of mitral regurgitation, mitral valve repair surgery has significant advantages over mitral valve replacement surgery in terms of survival rate, valvular complications, and valve durability. Currently, there are two main types of mitral valve repair annulus: rigid annulus and flexible annulus. Rigid annulus is made of a harder material, is not easily bent, and cannot achieve coordinated movement with the cardiac cycle. Flexible annulus is closer to the physiological activity of a normal mitral valve annulus and has less impact on left ventricular function, but its support and shaping effect are poorer, and it is prone to mitral regurgitation after surgery, resulting in a higher reoperation rate.

[0004] Existing mitral valve repair rings generally use the same locking assembly to lock the ring body at the end and to retract the ring. This has a low tolerance for error. If the operator makes a mistake or exceeds the travel limit, the ring may retract prematurely.

[0005] Therefore, a separate ring-locking structure is needed to achieve the shrinkage of the forming ring body. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the mitral valve angioplasty ring does not have a separate shrinkage and locking structure for the angioplasty ring body, thereby providing a shrinkage and locking structure for the mitral valve angioplasty ring.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0008] A mitral valve annuloplasty ring with a shrinkage locking structure, comprising:

[0009] The forming ring body includes at least two metal strips, end metal tubes sleeved at the ends of the metal strips, and connecting metal tubes sleeved between two adjacent metal strips; the two end metal tubes are connected by a snap-fit ​​assembly so that the forming ring body is connected end to end to form a ring structure.

[0010] The ends of two adjacent metal strips furthest from the end metal tube are both inserted into the inner cavity of the connecting metal tube; the metal strips and the inner wall of the connecting metal tube are connected by a ring-locking structure.

[0011] Furthermore, the metal strip is arc-shaped.

[0012] Furthermore, the cross-section of the metal strip is rectangular; the cross-sections of the end metal tube and the connecting metal tube are also rectangular.

[0013] Furthermore, the annular locking structure includes a plurality of slots formed on the metal strip and arranged along the length direction of the metal strip, and a plurality of barbs provided on the inner wall of the connecting metal tube and extending into the inner cavity of the connecting metal tube; the slots and the barbs engage with each other.

[0014] Furthermore, the annular locking structure includes a plurality of barbs disposed on the outer wall of the metal strip and arranged along the length direction of the metal strip, and a plurality of slots formed on the inner wall of the connecting metal tube and extending along the length direction of the connecting metal tube; the slots and the barbs engage with each other.

[0015] Furthermore, the cross-section of the metal strip is circular or elliptical; the cross-sections of the end metal tube and the connecting metal tube are also circular or elliptical.

[0016] Furthermore, the outer periphery of the metal strip is provided with a plurality of barbs evenly arranged in the circumferential direction, and the wall of the connecting metal tube is provided with a plurality of slots that are circumferentially arranged and pass through it, and the plurality of barbs and the plurality of slots are engaged in a one-to-one correspondence.

[0017] Furthermore, the outer periphery of the metal strip is provided with a plurality of circumferentially evenly arranged slots, and the inner wall of the connecting metal tube is provided with a plurality of circumferentially arranged barbs, and the plurality of barbs and the plurality of slots are engaged in a one-to-one correspondence.

[0018] Furthermore, a first traction hole is provided at the end of the metal strip away from the end metal tube, and a second traction hole is provided on the connecting metal tube; a retractable traction line is wound between the first traction hole and the second traction hole, and the two ends of the retractable traction line extend out from the second traction hole.

[0019] Furthermore, there are two metal strips: a head end metal strip and a fixed end metal strip. The end metal tube fitted onto the end of the head end metal strip near the buckle assembly is the head end metal tube, and the end metal tube fitted onto the end of the fixed end metal strip near the buckle assembly is the fixed end metal tube. The head end metal strip and the fixed end metal strip both have the first traction hole at their ends away from the buckle assembly, and the connecting metal tube has two second traction holes. There are two retractable traction lines, one of which passes through the first traction hole on the head end metal strip and one of the second traction holes on the connecting metal tube near the fixed end metal strip; the other retractable traction line passes through the first traction hole on the fixed end metal strip and the other of the second traction holes on the connecting metal tube near the head end metal strip.

[0020] Furthermore, a stop pin is provided between the inner and outer walls of the connecting metal tube, and the stop pin passes through the metal strip located in the inner cavity of the connecting metal tube.

[0021] Furthermore, the stop pin is provided with a stop pin pull hole, and a stop pin pull wire is passed through the stop pin pull hole.

[0022] Furthermore, the forming ring body also includes a shrinking section metal tube sleeved between the head end metal strip or the fixed end metal strip.

[0023] Furthermore, the inner side of the connecting metal tube is provided with several clearance notches.

[0024] The technical solution of this invention has the following advantages:

[0025] 1. The annular locking structure for mitral valve repair rings provided by this invention comprises at least two metal strips, end metal tubes fitted at the ends of the metal strips, and a connecting metal tube fitted between adjacent metal strips. The two end metal tubes are connected by a snap-fit ​​assembly, so that the annular body is connected end-to-end to form an annular structure. The ends of the two adjacent metal strips furthest from the end metal tubes are inserted into the inner cavity of the connecting metal tube. The inner walls of the metal strips and the connecting metal tube are connected by the annular locking structure. By adjusting the length of the metal strip inserted into the connecting metal tube, the size of the annular body can be adjusted, thereby achieving the function of independent retraction of the annular body. Compared with the prior art where the annular body achieves both self-locking and retraction through a snap-fit ​​assembly, this method has a higher fault tolerance rate, avoiding situations where the annular body retracts prematurely and irreversibly due to operator error or exceeding the travel limit, directly leading to surgical failure. The operation is also more convenient.

[0026] 2. The annular locking structure of the mitral valve repair annulus provided by this invention has rectangular cross-sections for the metal strip, the end metal tube, and the connecting metal tube. This design avoids torsion during annulus implantation and reduces the projected area of ​​the annulus body, optimizing the impact on hemodynamics and improving the heart valve repair effect. Furthermore, because the rectangular cross-section has a long side and is more suitable for the annular valve than a circular cross-section, it provides a larger contact area for the annular valve in mitral valve replacement.

[0027] 3. The circumferential locking structure of the mitral valve forming ring provided by the present invention has a circular or elliptical cross-section for the metal strip, the end metal tube and the connecting metal tube. This design can reduce the overall processing difficulty of the workpiece and reduce the precision matching requirements between the forming ring body and the covering component.

[0028] 4. The annular locking structure of the mitral valve annuloplasty ring provided by the present invention is provided with two contraction traction lines. This design allows the annuloplasty ring to contract in both directions, while making the contraction more uniform, distributing the force, protecting human tissue and preventing it from being pulled apart or torn.

[0029] 5. The annular locking structure of the mitral valve repair ring provided by the present invention has a stop pin inserted between the inner and outer walls of the connecting metal tube. The stop pin passes through a metal strip located in the inner cavity of the connecting metal tube. This design can ensure the stability of the repair ring body, prevent the metal strip and the connecting metal tube from sliding relative to each other in advance during the operation, improve the error tolerance of the operation, and avoid irreversible damage caused by premature contraction.

[0030] 6. The annular locking structure of the mitral valve shaping ring provided by the present invention has a two-stage guide head structure at the head end and a two-stage guide receiving cavity in the snap-fit ​​fixing end. This design can improve the stability of the connection of the shaping ring body. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 A three-dimensional structural diagram of the annular locking structure of the heart valve repair device provided by the present invention;

[0033] Figure 2 This is a schematic diagram showing the positional relationship between the forming ring body and the mesh substrate in this embodiment;

[0034] Figure 3This is a schematic diagram showing the positional relationship between the forming ring body and the shaping guide line in this embodiment;

[0035] Figure 4 This is a three-dimensional structural diagram of the forming ring body in this embodiment;

[0036] Figure 5 This is a cross-sectional view of the forming ring body in this embodiment;

[0037] Figure 6 This is a schematic diagram showing the connection relationship between the metal strip and the metal tube in this embodiment;

[0038] Figure 7 This is a schematic diagram showing the positional relationship of the metal tubes in this embodiment;

[0039] Figure 8 This is a cross-sectional view of the snap-fit ​​assembly in this embodiment;

[0040] Figure 9 This is a three-dimensional structural diagram of the buckle head end in this embodiment;

[0041] Figure 10 This is a three-dimensional exploded view of the buckle head end in this embodiment;

[0042] Figure 11 This is a schematic diagram of the rectangular barb at the head end in this embodiment;

[0043] Figure 12 This is a schematic diagram of the pyramidal head barb structure in this embodiment;

[0044] Figure 13 This is a schematic diagram of the petal-shaped barbs at the tip in this embodiment;

[0045] Figure 14 This is a schematic diagram of the fan-shaped barbs at the head end in this embodiment;

[0046] Figure 15 This is a schematic diagram of the guide head and the receiving cavity in this embodiment;

[0047] Figure 16 This is a schematic diagram of the structure of the dual-stage guide head and the dual-stage guide cavity in this embodiment;

[0048] Figure 17 This is a three-dimensional structural diagram of the metal strip in this embodiment;

[0049] Figure 18 This is a schematic diagram showing the positional relationship between the head-end locking pin and the fixed-end locking pin in this embodiment;

[0050] Figure 19 This is a schematic diagram of the circular head-end rotating lock cavity and the head-end rotating lock tongue in this embodiment;

[0051] Figure 20 This is a schematic diagram of the rectangular head-end rotating lock cavity and the head-end rotating lock tongue in this embodiment;

[0052] Figure 21 This is a schematic diagram of the circular head-end spring-loaded lock cavity and the head-end spring-loaded lock tongue in this embodiment;

[0053] Figure 22 This is a schematic diagram of the rectangular head-end spring-loaded lock cavity and the head-end spring-loaded lock tongue in this embodiment;

[0054] Figure 23 This is a schematic diagram showing the positional relationship between the soft-covered substrate covering section and the fan-shaped extension section in this embodiment;

[0055] Figure 24 This is a schematic diagram showing the positional relationship between the connecting metal tube and the stop pin in this embodiment;

[0056] Figure 25 This is a schematic diagram showing the connection relationship between the rectangular cross-section metal strip and the barbs in this embodiment;

[0057] Figure 26 This is a schematic diagram showing the connection relationship between the circular cross-section metal strip and the barbs in this embodiment.

[0058] Explanation of reference numerals in the attached drawings: 01. Forming ring body; 02. Covering substrate; 03. Shaping guide line; 2. Head end metal strip; 3. Fixed end metal strip; 4. Head end metal tube; 5. Fixed end metal tube; 6. Connecting part metal tube; 7. Shrinkage section metal tube; 8. Shrinkage traction line; 9. Stop pin; 901. Stop pin pull hole; 10. Snap-on assembly; 11. Snap-on head end; 1101. Head end guide head; 1102. Head end traction hole; 1103. Head end barb; 1104. Two-stage guide head; 12. Snap-on fixed end; 1201. Receiving cavity; 1202. Fixed end traction hole; 1203. Inward concave notch; 1204. Axial crack; 1205. Two-stage guide cavity 1206. Snap-on traction wire exit hole; 13. Snap-on traction wire; 14. Soft covering substrate; 15. Mesh substrate; 1501. Soft covering substrate covering section; 1502. Fan-shaped extension section; 16. Covering film; 17. Thread fixing ear; 18. Head end locking pin; 19. Fixed end locking pin; 20. Head end barb; 21. Head end barb groove; 22. Fixed end barb; 23. Fixed end barb groove; 24. Barb; 25. Snap groove; 26. Alternating notch; 27. First traction hole; 28. Second traction hole; 29. ​​Head end rotating locking cavity; 30. Head end rotating locking tongue; 31. Head end spring-type locking cavity; 32. Head end spring-type locking tongue; 33. Spring. Detailed Implementation

[0059] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0063] like Figure 1-7 The annular locking structure of a heart valve repair device shown includes a forming ring body 01, wherein the forming ring body 01 includes at least two metal strips, end metal tubes sleeved on the ends of the metal strips, and connecting metal tubes 6 sleeved between two adjacent metal strips; the two end metal tubes are connected by a snap-fit ​​assembly 10 so that the forming ring body 01 is connected end to end to form an annular structure; the ends of the two adjacent metal strips away from the end metal tubes are both inserted into the inner cavity of the connecting metal tube 6; the inner walls of the metal strips and the connecting metal tube 6 are connected by the annular locking structure.

[0064] This annular locking structure of the heart valve repair device comprises at least two metal strips, end metal tubes fitted at the ends of the metal strips, and a connecting metal tube 6 fitted between adjacent metal strips. The two end metal tubes are connected by a snap-fit ​​assembly 10, so that the forming ring body 01 is connected end to end to form an annular structure. The ends of the two adjacent metal strips furthest from the end metal tubes are inserted into the inner cavity of the connecting metal tube 6. The inner walls of the metal strips and the connecting metal tube 6 are connected by the annular locking structure. By adjusting the length of the metal strips inserted into the connecting metal tube 6, the size of the forming ring body 01 is adjusted, thereby enabling the forming ring body 01 to contract independently.

[0065] In this embodiment, there are two metal strips, namely the head end metal strip 2 and the fixed end metal strip 3; there is a shrinkage interval between the connecting part metal tube 6 and the end metal tube; the end metal tube sleeved on the end of the head end metal strip 2 near the buckle assembly 10 is the head end metal tube 4, and the end metal tube sleeved on the end of the fixed end metal strip 3 near the buckle assembly 10 is the fixed end metal tube 5.

[0066] In this embodiment, the metal tube on the forming ring body 01 also includes a shrinking section metal tube 7 sleeved on the head end metal strip 2 or sleeved on the middle of the fixed end metal strip 3. Several shaping guide lines 03 are wound around both the metal strip and the connecting metal tube 6. Specifically, the shaping guide lines 03 on the metal strip are located between the end metal tube and the shrinking section metal tube 7.

[0067] like Figure 7 As shown, in this embodiment, the inner side of the connecting metal tube 6 is provided with several clearance notches, specifically, the clearance notches are U-shaped or V-shaped. A stop pin 9 is inserted between the inner and outer walls of the connecting metal tube 6, and the stop pin 9 passes through a metal strip located in the inner cavity of the connecting metal tube 6. Specifically, the stop pin 9 is provided with a stop pin pull hole 901, and a stop pin pull wire passes through the stop pin pull hole 901. The design of the stop pin 9 can ensure the stability of the forming ring body 01, prevent the metal strip and the connecting metal tube 6 from sliding relative to each other prematurely during the operation, and avoid premature contraction affecting the surgical effect.

[0068] like Figure 18 and Figure 25As shown, in this embodiment, the metal strip and the inner wall of the connecting metal tube 6 are connected by a ring-locking structure. Specifically, the metal strip is arc-shaped, and the cross-sections of the metal strip, the end metal tube, and the connecting metal tube 6 are all rectangular. The ring-locking structure includes several slots 25 formed on the metal strip and arranged along the length of the metal strip, and several barbs 24 arranged in the inner cavity of the connecting metal tube 6. The slots 25 and the barbs 24 engage with each other. This design can prevent torsion during the implantation of the annulus and reduce the projected area of ​​the annulus body 01, optimizing the impact on hemodynamics and improving the heart valve repair effect. At the same time, since the rectangular cross-section has a long side and is more suitable for the annular valve than the circular cross-section, it can provide a larger contact area for the annular valve in mitral valve replacement.

[0069] Specifically, such as Figure 5 and Figure 17 As shown, several barbs 24 are distributed on opposite sides of the inner cavity of the metal tube, with staggered intervals between the barbs 24 on opposite sides. This design allows the barbs 24 to be arranged asymmetrically, improving space utilization, while avoiding the problem of loosening and resulting in false hooks caused by a symmetrical layout.

[0070] In an alternative embodiment, the ring-locking structure includes a plurality of barbs 24 disposed on the outer wall of the metal strip and disposed along the length direction of the metal strip, and a plurality of slots 25 formed on the inner wall of the connecting metal tube 6 and extending along the length direction of the connecting metal tube 6; the slots 25 and the barbs 24 engage with each other.

[0071] In alternative implementations, such as Figure 26 As shown, the cross-sections of the metal strip, the end metal tube, and the connecting metal tube 6 are all circular or elliptical. The outer periphery of the metal strip is provided with a plurality of circumferentially evenly arranged barbs 24, and the wall of the connecting metal tube 6 is provided with a plurality of circumferentially arranged slots 25, which engage one-to-one with the barbs 24. In an alternative embodiment, the outer periphery of the metal strip is provided with a plurality of circumferentially evenly arranged slots 25, and the inner wall of the connecting metal tube 6 is provided with a plurality of circumferentially arranged barbs 24, which engage one-to-one with the slots 25.

[0072] In an alternative embodiment, the head end metal tube 4 is provided with a head end barb 20, and the head end 11 and the head end metal strip 2 are provided with a head end barb groove 21 that cooperates with the head end barb 20; the fixed end metal tube 5 is provided with a fixed end barb 22, and the fixed end 12 and the fixed end metal strip 3 are provided with a fixed end barb groove 23 that cooperates with the fixed end barb 22.

[0073] In an alternative embodiment, the head end metal tube 4 is provided with a head end barb groove 21, and the head end 11 and the head end metal strip 2 are provided with head end barbs 20 that cooperate with the head end barb groove 21; the fixed end metal tube 5 is provided with a fixed end barb groove 23, and the fixed end 12 and the fixed end metal strip 3 are provided with fixed end barbs 22 that cooperate with the fixed end barb groove 23.

[0074] In alternative implementations, such as Figures 19-20 As shown, both ends of the head end metal tube 4 are provided with head end rotating locking cavities 29, and both the snap-on head end 11 and the head end metal strip 2 are provided with head end rotating locking tongues 30 that cooperate with the head end rotating locking cavities 29; both ends of the fixed end metal tube 5 are provided with fixed end rotating locking cavities, and both the snap-on fixed end 12 and the fixed end metal strip 3 are provided with fixed end rotating locking tongues that cooperate with the fixed end rotating locking cavities.

[0075] In alternative implementations, such as Figure 21-22 As shown, both ends of the head end metal tube 4 are provided with head end spring-type locking cavities 31, and both the snap-on head end 11 and the head end metal strip 2 are provided with head end spring-type locking tongues 32 that cooperate with the head end spring-type locking cavities 31; both ends of the fixed end metal tube 5 are provided with fixed end spring-type locking cavities, and both the snap-on fixed end 12 and the fixed end metal strip 3 are provided with fixed end spring-type locking tongues that cooperate with the fixed end spring-type locking cavities.

[0076] In an alternative embodiment, both ends of the head end metal tube 4 are provided with head end internal threads, and both the snap-on head end 11 and the head end metal strip 2 are provided with head end external threads that mate with the head end internal threads; both ends of the fixed end metal tube 5 are provided with fixed end internal threads, and both the snap-on fixed end 12 and the fixed end metal strip 3 are provided with fixed end external threads that mate with the fixed end internal threads.

[0077] like Figure 6 , Figure 7 and Figure 17 As shown, in this embodiment, the ends of the head metal strip 2 and the fixed metal strip 3 away from the buckle assembly 10 are both provided with a first traction hole 27, and the connecting metal tube 6 is provided with two second traction holes 28; there are two retractable traction lines 8, one of which passes through the first traction hole 27 on the head metal strip 2 and a second traction hole 28 on the connecting metal tube 6 near the fixed metal strip 3; the other retractable traction line 8 passes through the first traction hole 27 on the fixed metal strip 3 and another second traction hole 28 on the connecting metal tube 6 near the head metal strip 2.

[0078] In this embodiment, the snap-fit ​​assembly 10 is connected between the fixed-end metal tube 5 and the head-end metal tube 4. The snap-fit ​​assembly 10 includes a snap-fit ​​fixed end 12 tube connected to the fixed-end metal tube 5 and a snap-fit ​​head end 11 connected to the head-end metal tube 4. Specifically, the snap-fit ​​head end 11 is provided with a head-end guide head 1101, and the head-end guide head 1101 is provided with a head-end traction hole 1102. The snap-fit ​​fixed end 12 is an integral structure, and it is provided with a fixed end traction hole 1202 corresponding to the position of the head-end guide head 1101 and a snap-fit ​​traction wire exit hole 1206 opened on the tube wall of the snap-fit ​​fixed end 12 and communicating with the fixed end traction hole 1202. A snap-fit ​​traction wire 13 is passed through the head-end traction hole 1102, the fixed end traction hole 1202 and the snap-fit ​​traction wire exit hole 1206, and the two ends of the snap-fit ​​traction wire 13 extend outward from the snap-fit ​​traction wire exit hole 1206.

[0079] like Figure 11-14 As shown, in this embodiment, the snap-fit ​​fixing end 12 has an internal receiving cavity 1201 that can accommodate the head guide head 1101, and the fixing end traction hole 1202 communicates with the receiving cavity 1201. The snap-fit ​​fixing end 12 has an inner recessed notch 1203 on the inner wall corresponding to the receiving cavity 1201, and the outer periphery of the head guide head 1101 has a head barb 1103 that engages with the inner recessed notch 1203, and four of them are provided. Specifically, the head barb 1103 is petal-shaped, rectangular, pyramidal, or fan-shaped. In an alternative embodiment, the number of head barbs 1103 can also be set to five or six.

[0080] In alternative implementations, such as Figure 10 As shown, the snap-fit ​​fixing end 12 can also be configured as a split structure, making the snap-fit ​​fixing end 12 easier to process.

[0081] In alternative implementations, such as Figure 15 As shown, the snap-fit ​​fixing end 12 has an axial slit 1204 on the end face where the opening of the receiving cavity 1201 is located, so as to facilitate the insertion of the head end guide head 1101 into the receiving cavity 1201.

[0082] In alternative implementations, such as Figure 16 As shown, the head guide 1101 has a dual-stage guide head 1104 structure, and the receiving cavity 1201 inside the snap-fit ​​fixing end 12 is a dual-stage guide receiving cavity 1205. This design can improve the stability of the connection of the forming ring body 01.

[0083] like Figure 18As shown, in this embodiment, both ends of the head end metal tube 4 are connected to the snap-on head end 11 and the head end metal strip 2 respectively via head end locking pins 18; both ends of the fixed end metal tube 5 are connected to the snap-on fixed end 12 and the fixed end metal strip 3 respectively via fixed end locking pins 19. There are four head end locking pins 18 and four fixed end locking pins 19.

[0084] like Figure 2 As shown, in this embodiment, the covering substrate 02 includes a soft covering substrate 14, a mesh substrate 15 covering the soft covering substrate 14, and a covering film 16 covering the mesh substrate 15. Specifically, the covering substrate 02 is the soft covering substrate 14, which is made of silicone; the covering substrate 02 is the mesh substrate 15, which is a fan-shaped nickel-titanium alloy mesh. The covering film 16 is made of PET film or PET mesh fabric, and the covering film 16 is annular. Using silicone to make the soft covering substrate 14 can reduce the production cost of the formed ring body 01 and improve production efficiency.

[0085] In this embodiment, the covering substrate 02 covers the outer surface of the forming ring body 01. Specifically, the covering substrate 02 includes a covering section covering the surface of the forming ring body 01 and an extension section connected to the forming ring body 01 and extending outward in a direction away from the center of the annular structure formed by the forming ring body 01. The extension section of the covering substrate 02 is connected to the autologous flap of the human body by implanted rivets. With this design, the outwardly extending extension section can be used as the base surface for rivet positioning, making it easier to drive in the rivet. Compared with the traditional rivet that directly connects to the autologous flap through the forming ring body 01, the required positioning accuracy is lower, avoiding the repeated damage to the biological tissue caused by inaccurate positioning and the need to remove the anchor.

[0086] In this embodiment, the covering substrate 02 has multiple segments on the forming ring body 01, and respectively covers the outer surfaces of the head end metal tube 4, the fixed end metal tube 5, the connecting part metal tube 6, and the shrinking part metal tube 7. Specifically, the covering substrate 02 is annular, and the thickness of the covering substrate 02 covering the metal tube portion is greater than the thickness of the portion not covered by the metal tube.

[0087] like Figure 2 , Figure 23As shown, in this embodiment, the number of nickel-titanium alloy meshes is equal to the number of flexible coating substrates 14. One end of the nickel-titanium alloy mesh near the center of the fan-shaped arc wraps around the surface of the flexible coating substrate 14, while the other end extending outwards from the center of the fan-shaped arc forms a fan shape. Specifically, the nickel-titanium alloy mesh includes a flexible coating substrate covering section 1501 and a fan-shaped extension section 1502. The flexible coating substrate covering section 1501 and the fan-shaped extension section 1502 are connected by a frame-shaped stitching fixing ear 17. Stitches are sewn at the stitching fixing ear 17 to stitch the nickel-titanium alloy mesh to the flexible coating substrate 14. In an alternative embodiment, the coating film 16 includes an upper coating film and a lower coating film.

[0088] In summary, this annular locking structure of the heart valve repair device comprises at least two metal strips, end metal tubes fitted at the ends of the metal strips, and a connecting metal tube 6 fitted between adjacent metal strips. The two end metal tubes are connected by a snap-fit ​​assembly 10, so that the forming ring body 01 is connected end to end to form an annular structure. The ends of the two adjacent metal strips furthest from the end metal tubes are inserted into the inner cavity of the connecting metal tube 6. The inner walls of the metal strips and the connecting metal tube 6 are connected by the annular locking structure. By adjusting the length of the metal strips inserted into the connecting metal tube 6, the size of the forming ring body 01 is adjusted, thereby enabling the forming ring body 01 to contract independently.

[0089] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A ring-locking structure for a mitral valve shaping ring, characterized in that, include: The forming ring body (01) includes at least two metal strips, end metal tubes sleeved at the ends of the metal strips, and connecting metal tubes (6) sleeved between two adjacent metal strips; the two end metal tubes are connected by a snap-fit ​​assembly (10) so that the forming ring body (01) is connected end to end to form a ring structure; The ends of two adjacent metal strips away from the end metal tube are both inserted into the inner cavity of the connecting metal tube (6); the metal strips and the inner wall of the connecting metal tube (6) are connected by a ring-locking structure. There are two metal strips, namely a head end metal strip (2) and a fixed end metal strip (3); the end metal tube sleeved on the end of the head end metal strip (2) near the buckle assembly (10) is the head end metal tube (4), and the end metal tube sleeved on the end of the fixed end metal strip (3) near the buckle assembly (10) is the fixed end metal tube (5). The buckle assembly (10) includes a buckle fixing end (12) tube connected to the fixing end metal tube (5) and a buckle head end (11) connected to the head end metal tube (4). The buckle head end (11) is provided with a head end guide head (1101). The buckle fixing end (12) is provided with a receiving cavity (1201) that can accommodate the head end guide head (1101). The buckle fixing end (12) is provided with an inner recessed notch (1203) on the inner wall of the receiving cavity (1201). The outer periphery of the head end guide head (1101) is provided with a head end barb (1103) that engages with the inner recessed notch (1203).

2. The annular contraction and locking structure of the mitral valve shaping ring according to claim 1, characterized in that, The metal strip is arc-shaped.

3. The annular contraction and locking structure of the mitral valve shaping ring according to claim 2, characterized in that, The cross-section of the metal strip is rectangular; the cross-sections of the end metal tube and the connecting metal tube (6) are also rectangular.

4. The annular contraction and locking structure of the mitral valve shaping ring according to claim 3, characterized in that, The ring-locking structure includes a plurality of slots (25) formed on the metal strip and arranged along the length of the metal strip, and a plurality of barbs (24) formed on the inner wall of the connecting metal tube (6) and extending into the inner cavity of the connecting metal tube (6); the slots (25) and the barbs (24) engage with each other.

5. The annular contraction and locking structure of the mitral valve shaping ring according to claim 3, characterized in that, The ring-locking structure includes a plurality of barbs (24) disposed on the outer wall of the metal strip and arranged along the length direction of the metal strip, and a plurality of slots (25) extending along the length direction of the metal tube (6) on the inner wall of the connecting part; the slots (25) and the barbs (24) engage with each other.

6. The annular contraction and locking structure of the mitral valve shaping ring according to claim 2, characterized in that, The cross-section of the metal strip is circular or elliptical; the cross-sections of the end metal tube and the connecting metal tube (6) are also circular or elliptical.

7. The annular contraction and locking structure of the mitral valve shaping ring according to claim 6, characterized in that, The outer periphery of the metal strip is provided with a plurality of barbs (24) evenly arranged in the circumferential direction, and the wall of the connecting metal tube (6) is provided with a plurality of slots (25) that are circumferentially arranged and pass through it. The plurality of barbs (24) and the plurality of slots (25) are engaged in a one-to-one correspondence.

8. The annular contraction and locking structure of the mitral valve shaping ring according to claim 6, characterized in that, The outer periphery of the metal strip is provided with a plurality of circumferentially evenly arranged slots (25), and the inner wall of the connecting metal tube (6) is provided with a plurality of circumferentially arranged barbs (24), and the plurality of barbs (24) and the plurality of slots (25) are engaged one-to-one.

9. The annular locking structure of the mitral valve shaping ring according to any one of claims 1-8, characterized in that, The metal strip has a first traction hole (27) at one end away from the end metal tube, and a second traction hole (28) is provided on the connecting metal tube (6); a shrinkable traction line (8) is wound between the first traction hole (27) and the second traction hole (28), and the two ends of the shrinkable traction line (8) extend out from the second traction hole (28).

10. The annular contraction and locking structure of the mitral valve shaping ring according to claim 9, characterized in that, The first traction hole (27) is provided at the end of the head end metal strip (2) and the fixed end metal strip (3) away from the buckle assembly (10), and two second traction holes (28) are provided on the connecting part metal tube (6); there are two retractable traction lines (8), one of which passes through the first traction hole (27) on the head end metal strip (2) and one of the second traction holes (28) on the connecting part metal tube (6) near the fixed end metal strip (3); the other retractable traction line (8) passes through the first traction hole (27) on the fixed end metal strip (3) and another of the second traction holes (28) on the connecting part metal tube (6) near the head end metal strip (2).

11. The annular contraction and locking structure of the mitral valve shaping ring according to claim 10, characterized in that, A stop pin (9) is provided between the inner and outer walls of the connecting metal tube (6), and the stop pin (9) passes through the metal strip located in the inner cavity of the connecting metal tube (6).

12. The annular contraction and locking structure of the mitral valve shaping ring according to claim 11, characterized in that, The stop pin (9) is provided with a stop pin pull hole (901), and a stop pin (9) pull wire is passed through the stop pin pull hole (901).

13. The annular contraction and locking structure of the mitral valve shaping ring according to claim 10, characterized in that, The forming ring body (01) also includes a shrinking section metal tube (7) sleeved between the head end metal strip (2) or the fixed end metal strip (3).

14. The annular contraction and locking structure of the mitral valve shaping ring according to claim 10, characterized in that, The inner side of the connecting metal tube (6) is provided with several clearance notches.

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