An implantable tendon repair system

Abstract

The application relates to the technical field of medical devices, and discloses an implantable tendon repair system which comprises yarn and a lock catch, the yarn comprises upper yarn and lower yarn, the lock catch comprises a first lock catch and a second lock catch, the first lock catch is used for clamping one end of a fractured tendon, the second lock catch is used for clamping the other end of the fractured tendon, the first lock catch and the second lock catch both comprise upper lock catches and lower lock catches, the upper lock catches and the lower lock catches are detachably connected, the two ends of the upper yarn are connected with corresponding upper lock catches respectively, and the two ends of the lower yarn are connected with corresponding lower lock catches respectively; the implantable tendon repair system provided by the application solves the problems that the existing tendon repair operation is complicated and the postoperative effect is poor.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an implantable tendon repair system. Background Technology

[0002] Tendon repair is a common surgical procedure in orthopedics. However, traditional tendon repair methods often encounter the following problems:

[0003] 1. There is a risk of nerve damage during the autologous transplantation harvesting procedure;

[0004] 2. The supply of materials for allogeneic transplantation is limited, and artificial tendons (such as polyester materials) are prone to collapse in the later stages, accompanied by the risk of allergies and infections;

[0005] 3. Traditional surgical repair has a high rate of re-rupture and the postoperative results are not ideal.

[0006] Tendons require initial immobilization during repair, followed by early mobilization under protection to reduce adhesion formation. Excessive stress must be avoided during tendon repair to prevent rupture; tendon adhesions can cause pain and swelling, and restrict joint movement due to reduced tendon gliding. Approximately 20 weeks after injury, the tendon's morphology becomes very similar to a normal tendon, but in terms of biochemical and physiological characteristics, the repaired tendon is inferior to the pre-injury tendon.

[0007] Depending on the outer membrane, tendons can be divided into tendons within the synovial sheath (intramural tendons) and tendons covered by paratendinous tissue. Tendons in the hand and foot are typically encased in a synovial sheath. Like ligaments, tendons have a limited blood supply.

[0008] Inflammatory phase: Vasodilation, hematoma formation to fill defects (or gaps), increased capillary permeability, leukocyte migration; internal and / or external inflammatory cell infiltration.

[0009] Proliferative phase: mainly fibroblasts, collagen synthesis.

[0010] Remodeling phase: Collagen synthesis, increased density, and tendon healing.

[0011] It is generally accepted that the repair of tendons encased in paratendinous tissue is initiated by the infiltration of inflammatory cells. The exogenous theory posits that, similar to tendons encased in paratendinous tissue, intratendinous tendon repair occurs through granulation tissue within the tendon sheath and surrounding tissues, with tendon cells themselves playing a relatively minor role. The endogenous theory suggests that tendon cell proliferation at the injury site leads to the production of collagen and extracellular matrix. The initiation of the repair process may involve both mechanisms simultaneously. Early, excessive activity may lead to tendon re-rupture.

[0012] Existing techniques for repair can easily lead to tendon re-rupture, increase the patient's pain perception, and limit the mobility of the repaired area after surgery.

[0013] Traditional tendon repair is accomplished through suturing. However, different suturing methods have their own problems. The Kessler suture is simple to perform, but the wound is fragile and prone to breakage; the Bunnell buried suture is more stable, but the procedure is cumbersome and it is used for the repair of forearm flexor and extensor tendons, but rarely for the repair of tendons in the fingers, palms, and wrists; the double cross suture is only used when the condition requires rapid suturing.

[0014] As can be seen from the above, existing repair methods suffer from problems such as cumbersome tendon suturing procedures, fragile wounds that cannot withstand significant tensile forces, poor healing outcomes, and a high risk of postoperative infection and pain. They cannot simultaneously achieve both convenience and robust repair. Therefore, developing a convenient, efficient, and effective tendon repair system is one of the important research topics in this field. Summary of the Invention

[0015] The purpose of this invention is to provide an implantable tendon repair system to solve at least one of the aforementioned problems existing in the prior art.

[0016] To achieve the above objectives, the present invention adopts the following technical solution:

[0017] An implantable tendon repair system includes yarn and a locking mechanism. The yarn includes an upper yarn and a lower yarn. The locking mechanism includes a first locking mechanism and a second locking mechanism. The first locking mechanism is used to clamp one end of the ruptured tendon, and the second locking mechanism is used to clamp the other end of the ruptured tendon. Both the first and second locking mechanisms include an upper locking mechanism and a lower locking mechanism. The upper and lower locking mechanisms are detachably connected. The two ends of the upper yarn are respectively connected to the corresponding upper locking mechanism, and the two ends of the lower yarn are respectively connected to the corresponding lower locking mechanism.

[0018] In this technical solution, the locking mechanism is a key component of the system. Through the setting of a first locking mechanism and a second locking mechanism, the first locking mechanism clamps one end of the ruptured tendon, and the second locking mechanism clamps the other end, thereby fixing the locking mechanisms to both ends of the ruptured tendon. The two ends of the upper yarn are connected to the corresponding upper locking mechanism, and the two ends of the lower yarn are connected to the corresponding lower locking mechanism, thus reconnecting the ruptured tendon. Since both the first and second locking mechanisms include upper and lower locking mechanisms, and the upper and lower locking mechanisms are detachably connected, the design of the upper and lower locking mechanisms is for easy implantation. They are divided into upper and lower parts; after the upper and lower parts clamp the two ends of the ruptured tendon respectively, the upper and lower locking mechanisms can be locked using an instrument to complete the repair. In actual operation, the system can be clamped by the operating instrument and placed at both ends of the injured tendon. The operating instrument applies pressure to the locking buckle, causing the upper and lower locking buckles to move in opposite directions. That is, the upper and lower parts of the product bite the ends of the tendon, thereby fixing the first and second locking buckles to the ends of the ruptured tendon and reconnecting the ruptured tendon.

[0019] Therefore, it can be seen that the system is simple and efficient to operate, and has a good repair effect. The locking effect between the lock and the tendon is good, and the occlusion effect is stronger than that of suture suturing. It can withstand strong forces, thus reducing the chance of postoperative infection and improving the recovery of motor function in the repaired area.

[0020] Furthermore, in order to achieve a better effect in repairing tendons, the yarn is ultra-high molecular weight polyethylene yarn.

[0021] Furthermore, in order to make the connection between the yarn and the buckle more stable and reliable, and to improve the repair effect, the connection between the upper buckle and the upper yarn is the upper connection part, and the connection between the lower buckle and the lower yarn is the lower connection part, and the distance between the two upper connection parts is greater than the distance between the two lower connection parts.

[0022] Furthermore, to facilitate visual operation and improve ease of use, the upper locking buckle has an upper hollow structure, a side hollow structure, and an opening. The upper hollow structure is located above the upper locking buckle and communicates with the interior of the upper locking buckle. The side hollow structure is located on the side of the upper locking buckle and communicates with the interior of the upper locking buckle. The opening is located at the end of the upper locking buckle away from the yarn and communicates with the interior of the upper locking buckle. The upper hollow structure communicates with the opening. The lower end of the upper locking buckle has multiple first fastening parts. The lower locking buckle is a U-shaped locking buckle. The opening of the U-shaped locking buckle is located below the opening. This structural design facilitates the engagement of the tendon end from the opening. The lower locking buckle has a second fastening part at a position corresponding to the first fastening part. The first fastening part engages with the corresponding second fastening part.

[0023] Furthermore, in order to improve the stability of the upper locking structure, the upper locking includes an upper U-shaped arm, the two legs of the upper U-shaped arm extend downward to form a lower extension arm, and the two sides of the upper U-shaped arm are respectively provided with downwardly extending side extension arms. The side hollow structure is located between adjacent lower extension arms or between the lower extension arm and the side extension arm, and the opening is located between adjacent lower extension arms.

[0024] Furthermore, in order to facilitate the connection between the first and second latches, improve the cooperation between the upper and lower latches, and enhance the convenience of the tendon end engagement operation, multiple first latching parts are respectively set at the lower end of the lower extension arm and the side extension arm. The first latching part is a latching hook, and the latching hook is provided with a mating interface. The mating interface facilitates the second latching part to enter the latching hook, thereby realizing the hooking of the latching hook and the second latching part.

[0025] Furthermore, to improve the stability of the connection between the upper and lower locking buckles, the lower locking buckle includes two symmetrically arranged first locking rings and two symmetrically arranged second locking rings. The first locking rings are located near the lower connecting part, and the second locking rings are located away from the lower connecting part. An arc-shaped edge protruding towards the interior of the lower locking buckle is provided between the first and second locking rings, and the outer side of the arc-shaped edge is a recessed part. Since the end of the tendon is engaged in the internal space between the upper and lower locking buckles, the above design can improve the engagement effect of the internal space.

[0026] The U-shaped arm has two side extension arms on each side. The lower ends of the two side extension arms are connected to the corresponding first locking ring and arc edge through fastening hooks. The lower ends of the two lower extension arms are connected to the corresponding second locking ring through fastening hooks.

[0027] Furthermore, in order to improve the convenience and effectiveness of the locking mechanism engaging with the tendon end, the side extension arm includes an outer extension arm extending outward from the U-shaped arm and a vertical extension arm.

[0028] Furthermore, to facilitate the connection between the buckle and the yarn, the upper connecting part is located inside the U-shaped arm, and the lower connecting part is located inside the U-shaped buckle.

[0029] Furthermore, in order to improve the reliability of the connection between the yarn and the buckle, the upper yarn and the lower yarn are in a circumferentially closed state.

[0030] The beneficial effects of this invention are as follows: In this technical solution, the locking buckle is a key component of the system. Through the setting of a first locking buckle and a second locking buckle, the first locking buckle is used to clamp one end of the ruptured tendon, and the second locking buckle is used to clamp the other end of the ruptured tendon, thereby achieving fixation of the locking buckles to both ends of the ruptured tendon. The two ends of the upper yarn are respectively connected to the corresponding upper locking buckle, and the two ends of the lower yarn are respectively connected to the corresponding lower locking buckle, thus reconnecting the ruptured tendon through the arrangement of the upper and lower yarns. Since both the first and second locking buckles include upper and lower locking buckles, and the upper and lower locking buckles are detachably connected, the design of the upper and lower locking buckles is for easy implantation. They are divided into upper and lower parts. After the upper and lower parts clamp the two ends of the ruptured tendon respectively, the upper and lower locking buckles can be locked by operating the instrument to complete the repair. In actual operation, the system can be clamped by the operating instrument and placed at both ends of the injured tendon. The operating instrument applies pressure to the locking buckle, causing the upper and lower locking buckles to move in opposite directions. That is, the upper and lower parts of the product bite the ends of the tendon, thereby fixing the first and second locking buckles to the ends of the ruptured tendon and reconnecting the ruptured tendon.

[0031] Therefore, it can be seen that the system is simple and efficient to operate, and has a good repair effect. The locking effect between the lock and the tendon is good, and the occlusion effect is stronger than that of suture suturing. It can withstand strong forces, thus reducing the chance of postoperative infection and improving the recovery of motor function in the repaired area. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention;

[0033] Figure 2 This is a top view of the present invention, showing the structure of the lock engaging with only one end of the tendon.

[0034] Figure 3 This is a schematic diagram of the main structure of the present invention;

[0035] Figure 4 This is a side view of the structure of the present invention.

[0036] In the diagram: 1. Upper yarn; 2. Lower yarn; 3. Upper buckle; 4. Lower buckle; 5. Tendon; 6. Upper connecting part; 7. Lower connecting part; 8. Upper hollow structure; 9. Side hollow structure; 10. Opening; 11. Upper U-shaped arm; 12. Lower extension arm; 13. Side extension arm; 13.1. Outer extension arm; 13.2. Vertical extension arm; 14. Hook; 15. First locking ring; 16. Second locking ring; 17. Arc edge; 18. Recess; 19. Internal space. Detailed Implementation

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0038] Example 1:

[0039] like Figures 1-3 As shown, this embodiment provides an implantable tendon repair system, including yarn and buckles. The yarn includes an upper yarn 1 and a lower yarn 2. The buckles include a first buckle and a second buckle. The first buckle is used to clamp one end of the tendon 5, and the second buckle is used to clamp the other end of the tendon 5. Both the first buckle and the second buckle include an upper buckle 3 and a lower buckle 4. The upper buckle 3 and the lower buckle 4 are detachably connected. The two ends of the upper yarn 1 are respectively connected to the corresponding upper buckle 3, and the two ends of the lower yarn 2 are respectively connected to the corresponding lower buckle 4.

[0040] In this technical solution, the locking mechanism is a key component of the system. The first locking mechanism clamps one end of the tendon 5, and the second locking mechanism clamps the other end, thus fixing the locking mechanisms to both ends of the tendon 5. The two ends of the upper yarn 1 are connected to the corresponding upper locking mechanism 3, and the two ends of the lower yarn 2 are connected to the corresponding lower locking mechanism 4. The upper yarn 1 and lower yarn 2 are used to reconnect the ruptured tendon. Since both the first and second locking mechanisms include upper locking mechanisms 3 and lower locking mechanisms 4, and these mechanisms are detachably connected, the upper locking mechanisms 3 and 4 are designed for easy implantation and are divided into upper and lower parts. After the upper and lower parts clamp the two ends of the tendon 5, the upper locking mechanism 3 and lower locking mechanism 4 can be locked together using an instrument to complete the repair. In actual operation, the system can be clamped by the operating instrument and placed at both ends of the injured tendon 5. The operating instrument applies pressure to the buckles, causing the upper buckle 3 and the lower buckle 4 to move in opposite directions. That is, the upper and lower parts of the product bite the ends of the tendon 5, thereby fixing the first buckle and the second buckle to the ends of the tendon 5 respectively, and reconnecting the ruptured tendon.

[0041] Therefore, it can be seen that the system is simple and efficient to operate, and has a good repair effect. The locking effect between the lock and the tendon is good, and the occlusion effect is stronger than that of suture suturing. It can withstand strong forces, thus reducing the chance of postoperative infection and improving the recovery of motor function in the repaired area.

[0042] Example 2:

[0043] This embodiment is an optimization based on the above embodiment 1.

[0044] To achieve better tendon repair, the yarn is made of ultra-high molecular weight polyethylene yarn.

[0045] Example 3:

[0046] This embodiment is an optimization based on the above embodiment 1.

[0047] To make the connection between the yarn and the buckle more stable and reliable, and to improve the repair effect, the connection between the upper buckle 3 and the upper yarn 1 is the upper connection part 6, and the connection between the lower buckle 4 and the lower yarn 2 is the lower connection part 7. The distance between the two upper connection parts 6 is greater than the distance between the two lower connection parts 7.

[0048] Example 4:

[0049] This embodiment is an optimization based on the above embodiment 1.

[0050] To facilitate visualization and improve ease of operation, the upper locking buckle 3 has an upper hollow structure 8, a side hollow structure 9, and an opening 10. The upper hollow structure 8 is located above the upper locking buckle 3 and communicates with the interior of the upper locking buckle 3. The side hollow structure 9 is located on the side of the upper locking buckle 3 and communicates with the interior of the upper locking buckle 3. The opening 10 is located at the end of the upper locking buckle 3 away from the yarn and communicates with the interior of the upper locking buckle 3. The upper hollow structure 8 and the opening 10 are connected. The above hollow design makes it easy to see whether the implantation position is appropriate during surgery, realizing operation visualization. At the same time, it also makes the upper locking buckle 3 have a certain deformation ability under external force. The elastic clamping effect of the buckle itself can clamp both ends of the tendon 5, which facilitates the operation of its biting function after being connected with the lower locking buckle 4. The lower end of the upper locking buckle 3 has multiple first fastening parts, and the lower locking buckle 4 is a U-shaped buckle with the opening of the U-shaped buckle located below the opening 10. This structural design facilitates the engagement of the tendon 5 end from the opening 10. The lower locking buckle 4 has a second fastening part at the position corresponding to the first fastening part, and the first fastening part is engaged with the corresponding second fastening part.

[0051] Example 5:

[0052] This embodiment is an optimization based on the above embodiment 4.

[0053] To improve the stability of the upper locking buckle 3 structure, the upper locking buckle 3 includes an upper U-shaped arm 11, with two legs of the upper U-shaped arm 11 extending downward to form a lower extension arm 12. The upper U-shaped arm 11 has side extension arms 13 extending downward on both sides. The side hollow structure 9 is located between adjacent lower extension arms 12 or between lower extension arms 12 and side extension arms 13. The opening 10 is located between adjacent lower extension arms 12.

[0054] Specifically, the gap in the middle of the upper U-shaped arm 11 is smaller than the gap at both ends, and the position of the U-shaped arm 11 near the opening 10 is in an flared state, which makes it easier to achieve the biting fixation of the tendon 5.

[0055] Example 6:

[0056] This embodiment is an optimization based on the above embodiment 5.

[0057] To facilitate the connection between the first and second latches, improve the coordination between the upper latch 3 and the lower latch 4, and enhance the ease of engagement of the tendon 5 end, multiple first latching parts are respectively located at the lower ends of the lower extension arm 12 and the side extension arm 13. The first latching part is a latching hook 14, which has a mating interface. The mating interface facilitates the entry of the second latching part into the latching hook 14, thereby enabling the latching hook 14 to be engaged with the second latching part.

[0058] Example 7:

[0059] This embodiment is an optimization based on the above embodiment 6.

[0060] To improve the stability of the connection between the upper locking buckle 3 and the lower locking buckle 4, the lower locking buckle 4 includes two symmetrically arranged first locking rings 15 and two symmetrically arranged second locking rings 16. The first locking rings 15 are located near the lower connecting part 7, and the second locking rings 16 are located away from the lower connecting part 7. An arc-shaped edge 17 protruding towards the interior of the lower locking buckle 4 is provided between the first locking rings 15 and the second locking rings 16. The outer side of the arc-shaped edge 17 is a recessed part 18. Since the end of the tendon 5 is engaged in the internal space 19 between the upper locking buckle 3 and the lower locking buckle 4, the above design can improve the engagement effect of the internal space 19.

[0061] To improve the stability of the connection between the upper locking buckle 3 and the lower locking buckle 4, two side extension arms 13 are provided on both sides of the U-shaped arm 11. The lower ends of the two side extension arms 13 are connected to the corresponding first locking ring 15 and arc edge 17 through the fastening hook 14, and the lower ends of the two lower extension arms 12 are connected to the corresponding second locking ring 16 through the fastening hook 14.

[0062] The first locking ring 15, the second locking ring 16, and the arc-shaped edge 17 mentioned above are all specific structural designs of the second fastening part.

[0063] In summary, the above structural design facilitates surgical procedures, improves surgical efficiency while ensuring secure fixation, and resolves the patient's pain as quickly as possible.

[0064] Example 8:

[0065] This embodiment is an optimization based on the above embodiment 6.

[0066] To improve the ease of engagement and engagement effect between the lock and the end of the tendon 5, the lateral extension arm 13 includes an outer extension arm 13.1 extending outward from the U-shaped arm 11 and a vertical extension arm 13.2.

[0067] Example 9:

[0068] This embodiment is an optimization based on the above embodiment 5.

[0069] To facilitate the connection between the buckle and the yarn, the upper connecting part 6 is located inside the U-shaped arm 11, and the lower connecting part 7 is located inside the U-shaped buckle.

[0070] Example 10:

[0071] This embodiment is an optimization based on the above embodiment 1.

[0072] To improve the reliability of the connection between the yarn and the buckle, the upper yarn 1 and the lower yarn 2 are in a circumferentially closed state.

[0073] It should be noted that, in order to improve the convenience and firmness of the locking operation of the upper locking buckle 3 and the lower locking buckle 4, a special operating device can be designed. First, install the upper locking buckle 3 and the lower locking buckle 4 in appropriate positions on the operating device. After determining the position of the tendon end, align the device with both ends of the tendon 5, and then press the operating device, similar to the pressing operation of a stapler, so that the upper locking buckle 3 and the lower locking buckle 4 hook and connect respectively, completing the locking operation with the end of the tendon 5, and reconnecting the ruptured tendon.

[0074] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An implantable tendon repair system, characterized in that: The device includes yarn and a locking mechanism. The yarn consists of an upper yarn and a lower yarn. The locking mechanism consists of a first locking mechanism and a second locking mechanism. The first locking mechanism is used to clamp one end of the ruptured tendon, and the second locking mechanism is used to clamp the other end of the ruptured tendon. Both the first and second locking mechanisms include an upper locking mechanism and a lower locking mechanism. The upper and lower locking mechanisms are detachably connected. Both ends of the upper yarn are connected to the corresponding upper locking mechanism, and both ends of the lower yarn are connected to the corresponding lower locking mechanism. The upper buckle has an upper hollow structure, a side hollow structure, and an opening. The upper hollow structure is located above the upper buckle and communicates with the interior of the upper buckle. The side hollow structure is located on the side of the upper buckle and communicates with the interior of the upper buckle. The opening is located at the end of the upper buckle away from the yarn and communicates with the interior of the upper buckle. The upper hollow structure communicates with the opening. The lower end of the upper buckle has multiple first fastening parts. The lower buckle is a U-shaped buckle. The opening of the U-shaped buckle is located below the opening. The lower buckle has a second fastening part at a position corresponding to the first fastening part. The first fastening part fastens with the corresponding second fastening part. The upper latch includes an upper U-shaped arm, the two legs of the upper U-shaped arm extend downward to form a lower extension arm, and the two sides of the upper U-shaped arm are respectively provided with downwardly extending side extension arms. The side hollow structure is located between adjacent lower extension arms or between the lower extension arm and the side extension arm, and the opening is located between adjacent lower extension arms. Multiple first fastening parts are respectively disposed at the lower end of the lower extension arm and the side extension arm. The first fastening part is a fastening hook. The fastening hook is provided with a mating interface. The mating interface facilitates the entry of the second fastening part into the fastening hook, thereby realizing the hooking of the fastening hook and the second fastening part. The lower locking buckle includes two symmetrically arranged first locking rings and two symmetrically arranged second locking rings. The first locking rings are located near the lower connecting part, and the second locking rings are located away from the lower connecting part. An arc-shaped edge protruding towards the interior of the lower locking buckle is provided between the first locking rings and the second locking rings, and the outer side of the arc-shaped edge is a recessed part. The U-shaped arm has two side extension arms on each side. The lower ends of the two side extension arms are connected to the corresponding first locking ring and arc edge through fastening hooks. The lower ends of the two lower extension arms are connected to the corresponding second locking ring through fastening hooks. The upper and lower yarns are in a circumferentially closed state; The gap in the middle of the upper U-shaped arm is smaller than the gap at both ends, and the U-shaped arm is in a flared state near the opening; The connection between the upper buckle and the upper yarn is the upper connection part, and the connection between the lower buckle and the lower yarn is the lower connection part. The distance between the two upper connection parts is greater than the distance between the two lower connection parts.

2. The implantable tendon repair system according to claim 1, characterized in that: The yarn is ultra-high molecular weight polyethylene yarn.

3. The implantable tendon repair system according to claim 1, characterized in that: The side extension arm includes an outer extension arm extending outward from the U-shaped arm and a vertical extension arm.

4. The implantable tendon repair system according to claim 1, characterized in that: The upper connecting part is located inside the U-shaped arm, and the lower connecting part is located inside the U-shaped buckle.

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