A spiral-wound knotless suture securing device and suture knotting method

Abstract

The application discloses a kind of spiral winding type knot-free suture fixing device and suture knotting method, including outer fixed screw, inner winding bolt the outer fixed screw top end is opened with fixed line groove, and from fixed line groove bottom is opened with inner winding bolt hole, the inner winding bolt can be rotated into the inner winding bolt hole;Suture hole for inserting suture is opened on the inner winding bolt, and suture can be spirally wound on inner winding bolt.The application, outer fixed screw is rotated into bone and determines suture connection position, then suture is inserted into suture hole, and suture is wound on inner winding bolt by the process that inner winding bolt is rotated into inner winding bolt hole, and the structure of fixed line groove is combined to realize the clamping and fixing of winding, to realize the connection of suture, can effectively save suture knotting process, to effectively avoid the situation that knot is loose when suture knotting, to guarantee the reliability of suture connection, improve the effectiveness of treatment.

Description

Technical Field

[0001] This invention relates to the field of medical assistive devices, specifically to a spiral-wound knotless suture fixing device and a suture knotting method. Background Technology

[0002] Suture anchors are a commonly used surgical material in the medical field, especially in orthopedics, for fixing soft tissue to bone. They typically include rigid suture anchors and soft suture anchors. Rigid anchors mainly include metal anchors, PEEK anchors, and absorbable material anchors, while soft anchors are primarily the all-suture anchors that have emerged in recent years. Unlike traditional rigid anchors, these all-suture anchors are made of a soft material, require less bone removal during surgery, offer high fixation strength, are easy to use, and use the same material for both the suture and the anchor, resulting in good biocompatibility. The general method for fixing soft tissue with suture anchors involves implanting the anchor into the bone, knotting one end of the suture and looping it around the anchor, then using a suture or a special suture-passing tool to pass the other end of the suture through the soft tissue to be fixed, and finally returning the other end of the suture to the anchor and knotting it again. The suture method using anchor pins with thread is time-consuming and requires high technical skills. Furthermore, the suture is prone to loosening at the knot during knotting, resulting in an unreliable suture connection and affecting the treatment effect. Therefore, how to avoid loosening at the knot during suture knotting has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide a spiral-wound knotless suture fixation device, which can wrap the suture around itself and, together with an external fixing screw, achieve suture connection and fastening. This effectively eliminates the suture knotting process, thereby effectively preventing the knot from loosening, ensuring the reliability of the suture connection, and improving the effectiveness of treatment.

[0004] This invention is achieved through the following technical solution: A spiral-wound knotless suture fixing device includes an outer fixing screw and an inner winding bolt. The top of the outer fixing screw has a suture fixing groove facing downwards, and an inner winding bolt hole is formed from the bottom of the suture fixing groove downwards. The inner winding bolt can be screwed into the inner winding bolt hole. The inner winding bolt has a suture hole for inserting the suture, and the suture can be spirally wound around the inner winding bolt. To solve the above-mentioned technical problems and achieve the corresponding technical effects, this invention involves screwing an external fixation screw into the bone to determine the suture connection position. Then, after the suture passes through the suture hole, the process of the inner winding bolt being screwed into its hole causes the suture to wrap around the inner winding bolt. Combined with the structure of the suture-fixing groove, the winding is secured and fixed, thus achieving the suture connection. This effectively eliminates the need for suture knotting, thereby effectively preventing loosening at the knot and ensuring the reliability of the suture connection, improving the effectiveness of the treatment.

[0005] Further technical solutions: The thread on the outer wall of the external fixation screw is a first external thread, which is used to screw into the bone. The inner thread section is provided in the inner winding bolt hole, and the inner thread is adapted to the second external thread opened on the inner winding bolt. When the inner thread and the second external thread are engaged, the sewing hole is located in the fixing groove.

[0006] Furthermore: the second external thread is located at the middle section of the inner winding bolt, the upper part of the second external thread is the winding section, and the sewing hole is located in the winding section.

[0007] Furthermore: below the second external thread is an anti-deflection guide rod section, and below the internal thread section is a guide rod hole, and the anti-deflection guide rod section can be inserted into the guide rod hole.

[0008] Furthermore: the groove wall of the thread-fixing groove is provided with a thread passage for the thread to enter the thread-fixing groove, and the thread enters the thread-fixing groove through the thread passage and passes through the thread hole; Furthermore: the inner wall of the fixed groove is a movable inner wall, and the movable inner wall can contract toward the center of the fixed groove; Furthermore, the two sutures divide the movable inner wall into left and right movable inner wall sections through the opening.

[0009] Furthermore, it also includes a transmission mechanism, with each of the two movable inner walls connected to a transmission mechanism, and the two transmission mechanisms are symmetrically arranged about the axis of the external fixing screw; Furthermore, the vertical movement of the inner winding bolt is converted into the horizontal movement of the movable inner wall through the transmission mechanism.

[0010] Furthermore: the transmission mechanism includes a transverse transmission wedge, a vertical transmission wedge, a wedge block assembly fixed to the movable inner wall, and a wedge-shaped part provided on the anti-deflection light rod section. Both ends of the vertical transmission wedge are wedge-shaped surfaces, and the two ends of the vertical transmission wedge, together with the transverse transmission wedge and the wedge block assembly, respectively form a wedge-shaped transmission structure. Furthermore, the other end of the transverse transmission wedge and the wedge-shaped portion form a wedge-shaped transmission structure.

[0011] Furthermore: when the inner winding bolt is inserted into the inner winding bolt hole and no winding is performed, the bottom end of the wedge-shaped part touches the transverse transmission wedge.

[0012] Furthermore, the length of the wedge-shaped portion is equal to the length of the second external thread.

[0013] Furthermore: the wedge assembly includes a return spring, a wedge-shaped member with a cap, and a wedge-shaped groove formed in the external fixing screw. The wedge-shaped member with a cap is slidably disposed in the wedge-shaped groove, and one end of the return spring is abutted against the wedge-shaped groove and the other end of the return spring is abutted against the cap of the wedge-shaped member with a cap. Furthermore: one end of the wedge-shaped component of the belt cap is fixed to the movable inner wall, and the other end of the wedge-shaped component of the belt cap is a wedge-shaped surface, which together with the wedge-shaped surface of the vertical transmission wedge constitutes a wedge-shaped transmission structure.

[0014] Furthermore: the stitch hole is located at the bottom end of the winding segment, and the stitches are wound upwards sequentially around the winding segment during winding.

[0015] A thread-tying method using a spiral-wound knotless thread-fixing device is described below: Step S1: Screw the external fixation screws into the bone for internal fixation; Step S2: Secure one end of the suture to the soft tissue layer, and pass the other end through the suture hole; Step S3: Place the winding screw into the inner winding bolt hole and adjust the length of the sewing thread at both ends of the sewing hole; Step S4: Screw in the inner winding bolt to wrap the thread around the winding section; Step S5: Tightly attach the thread to the inner wall of the thread-fixing groove and complete the thread knot.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. This invention discloses a spiral-wound knotless suture fixation device and a suture knotting method. In this solution, an external fixation screw is screwed into the bone to determine the suture connection position. Then, after the suture is passed through the suture hole, the suture is wound around the inner winding bolt by the inner winding bolt hole. Combined with the structure of the suture fixing groove, the winding is fixed and secured, thereby achieving the suture connection. This effectively eliminates the suture knotting process, thus effectively avoiding loosening at the knot when sutures are knotted, thereby ensuring the reliability of the suture connection and improving the effectiveness of treatment.

[0017] 2. This invention provides a spiral-wound knotless suture fixing device and suture knotting method. The inner wall of the suture fixing groove is configured as two movable inner walls that can retract towards the center. During the suture winding process, the opening distance of the movable inner walls is greater than the sum of the diameter of the winding segment and the suture. At this time, the suture will not rub against the inner wall of the suture fixing groove during the rotation and winding process, thereby preventing damage to the suture and ensuring the effectiveness of the suture knot fixing, avoiding the situation where the suture breaks due to wear. As the suture winds, the two movable inner walls retract towards the center. When the suture winding is completed, the two movable inner walls retract to a state that just presses the suture tightly, thereby achieving the fixing of the suture.

[0018] 3. The present invention provides a spiral winding type knotless sewing thread fixing device and sewing thread knotting method. The cooperation between the smooth rod hole and the anti-deflection smooth rod section structure can prevent the inner winding bolt from deflecting during the rotation winding process, thereby ensuring that the sewing thread can be accurately wound on the winding section, and thus realizing the connection of the sewing thread.

[0019] 4. The present invention provides a spiral winding type knotless suture fixing device and suture knotting method. The present invention has a simple structure and is easy to operate, which can reduce the difficulty of work while ensuring the stability of suture connection. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the external fixing screw structure of the present invention; Figure 3 This is a schematic diagram of the internal winding bolt structure of the present invention; Figure 4 This is a schematic diagram of the transmission mechanism structure of the present invention; Figure 5 This is a schematic diagram of the wedge block assembly structure; Figure 6 This is a schematic diagram of the stitching structure in Example 5, where the stitches move left and right. The attached diagram shows the markings and corresponding component names: 1-External fixing screw, 2-Internal winding bolt, 3-Transmission mechanism, 11-Fixing groove, 12-Internal winding bolt hole, 13-First external thread, 14-Sewing passage, 15-Modible inner wall, 16-Wedge groove, 21-Sewing hole, 22-Second external thread, 23-Winding section, 24-Anti-deflection smooth rod section, 31-Transverse transmission wedge, 32-Vertical transmission wedge, 33-Wedge assembly, 121-Internal thread section, 122-Smooth rod hole, 241-Wedge part, 331-Reset spring, 332-Wedge with cap. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0022] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0023] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limiting the scope of protection of this invention.

[0025] The previous method of suture knotting involved inserting a suture anchor into the bone, knotting one end of the suture and looping it over the anchor, then using a suture or a special suture-passing tool to pass the other end of the suture through the soft tissue to be fixed, and finally returning the other end of the suture to the anchor for knotting. This method of suturing with suture anchors was time-consuming, technically demanding, and prone to loosening at the knot, resulting in an unreliable suture connection and affecting the treatment outcome. Example

[0026] like Figures 1-3 As shown, this invention discloses a spiral-wound knotless suture fixing device, comprising an external fixing screw 1 and an internal winding bolt 2. The external fixing screw 1 has a suture-fixing groove 11 with its top end facing downwards, and an internal winding bolt hole 12 with its bottom facing downwards from the groove 11. The internal winding bolt 2 can be screwed into the internal winding bolt hole 12. The internal winding bolt 2 has a suture hole 21 for inserting sutures, and the suture can be spirally wound around the internal winding bolt 2. In this embodiment, the external fixing screw 1 is screwed into the bone for fixation to determine the connection position of the suture; the internal winding bolt 2, by screwing into the winding bolt hole 12, drives the suture passing through the suture hole 21 to wind around it. At this time, the suture wound on the internal winding bolt 2 can be tightly attached to the inner sidewall of the groove 11, thereby achieving suture fixation.

[0027] Compared to traditional thread-tying methods, which are complex and difficult to operate, and prone to loosening due to manual knotting, resulting in poor knotting effect, the spiral-wound knot-free thread fixing device provided in this embodiment is simple and convenient to use. The thread can be fixed simply by screwing the inner winding bolt 2 into the outer fixing screw 1, which provides a better fixing effect and prevents loosening of the knot during the knotting process.

[0028] The thread on the outer wall of the external fixation screw 1 is a first external thread 13, which is used to screw into the bone. In this embodiment, the external fixation screw 1 is preferably a self-tapping screw, with the first external thread 13 used to drill a hole in the bone and fix the external fixation screw 1 into the bone. The inner threaded section 121 is provided in the inner threaded bolt hole 12, and the inner thread is adapted to the second external thread 22 on the inner threaded bolt 2. When the inner thread and the second external thread 22 are engaged, the suture hole 21 is located in the suture fixing groove 11. The second external thread 22 is located in the middle section of the inner threaded bolt 2, and the upper part of the second external thread 22 is the winding section 23, and the suture hole 21 is located in the winding section 23. In this embodiment, the opening of the inner winding bolt hole 12 is mainly used to install and fix the inner winding bolt 2. When the inner winding bolt 2 is fully engaged with the second external thread 22, the thread wrapped around the inner winding bolt 2 is located in the fixing groove 11, and the wrapped thread is tightly attached to the inner sidewall of the fixing groove 11 to achieve the knotting effect of the thread.

[0029] Below the second external thread 22 is an anti-deflection smooth rod section 24, and below the internal thread section 121 is a smooth rod hole 122, and the anti-deflection smooth rod section 24 can be inserted into the smooth rod hole 122. During the winding process, the thread will generate torque on the inner winding bolt 2, which may cause the inner winding bolt 2 to deflect and affect the thread connection effect. Therefore, in this embodiment, by setting the anti-deflection smooth rod section 24 and the smooth rod hole 122, when the anti-deflection smooth rod section 24 can be inserted into the smooth rod hole 122, the smooth rod hole 122 can restrict the anti-deflection smooth rod section 24, thereby preventing the entire inner winding bolt 2 from deflecting. The diameter of the anti-deflection smooth rod section 24 is limited to be smaller than the diameter of the second external thread 22 to ensure that the anti-deflection smooth rod section 24 can be effectively inserted into the smooth rod hole 122.

[0030] The groove wall of the thread-fixing groove 11 is provided with a thread passage 14 for the thread to enter the thread-fixing groove 11, and the thread enters the thread-fixing groove 11 through the thread passage 14 and passes through the thread hole 21. In this embodiment, the opening of the thread passage 14 can provide a channel for the thread to enter the thread-fixing groove 11, ensuring that the thread can smoothly enter the thread-fixing groove 11 and be wound around the inner winding bolt 2.

[0031] The inner wall of the aforementioned thread-fixing groove 11 is a fixed inner wall, which clamps the wound thread together with the outer wall of the winding section 23. While this structure effectively clamps the thread and completes the knotting process, in actual use, the thread experiences friction during rotation due to the pressure from the inner wall and the outer wall of the winding section 23. This friction can damage the thread. To avoid damaging the thread, this embodiment preferably employs the following solution to address this issue: The inner wall of the thread-fixing groove 11 is a movable inner wall 15, and the movable inner wall 15 can retract towards the center of the thread-fixing groove 11; the two threads divide the movable inner wall 15 into two movable inner walls 15, left and right, through the opening 14. In this embodiment, it is preferable to set the inner wall of the thread-fixing groove 11 as two movable inner walls 15 that can retract towards the center, and the outer side of the movable inner wall 15 is provided with a sliding structure that can slide within the thread-fixing groove 11; when the thread is being wound, the opening distance of the movable inner wall 15 is greater than the sum of the diameter of the winding segment 23 and the thread, so that the thread will not rub against the inner wall of the thread-fixing groove 11 during the rotation and winding process, thereby preventing damage to the thread and ensuring the effectiveness of the thread knot fixation, avoiding the situation where the thread breaks due to wear; as the thread is wound, the two movable inner walls 15 retract towards the center, and when the thread is wound, the two movable inner walls 15 retract to a state that just presses the thread tightly, thereby achieving the fixation of the thread.

[0032] The stitch hole 21 is located at the bottom end of the winding segment 23, and the stitches are wound upwards onto the winding segment 23 during winding. At this time, the stitch hole 21 moves downwards as the inner winding bolt 2 is screwed in, and the winding position of the stitches relative to the winding segment 23 also moves upwards, thereby ensuring that the stitches can be wound upwards towards the upper end of the winding segment 23 in sequence. This prevents the stitches from overlapping at the same position and prematurely sticking to the inner wall of the thread-fixing groove 11, which would cause the inner winding bolt 2 to get stuck when screwed in, thus preventing the stitches from being properly fixed. Example

[0033] Based on Embodiment 1, this embodiment provides a transmission mechanism 3 to convert the downward screwing action of the inner thread-wrapping bolt 2 into the action of the movable inner wall 15 contracting towards the center, thereby achieving the tightening of the thread and realizing the effect of knotting the thread. The specific structure is as follows: like Figure 4 As shown, the two movable inner walls 15 are respectively connected to a set of transmission mechanisms 3, and the two sets of transmission mechanisms 3 are symmetrically arranged about the axis of the external fixing screw 1. Of course, in different embodiments, the transmission mechanism 3 can be set to multiple sets, and the multiple sets of transmission mechanisms 3 are arranged symmetrically about the axis of the fixing screw 1 and are respectively connected to a movable inner wall 15. This embodiment has arranged two sets as an example for explanation. The two symmetrically arranged transmission mechanisms 3 are respectively connected to a movable inner wall 15, which can realize the synchronous movement of the two movable inner walls 15 and ensure that the two movable inner walls 15 can simultaneously achieve the fastening effect of the sewing thread. If the two movable inner walls 15 contract towards the center asynchronously, it will cause one side of the movable inner wall 15 to be in close contact with the sewing thread first, thereby causing wear of the sewing thread. In severe cases, it may also cause the inner winding bolt 2 to be screwed in and stuck.

[0034] The transmission mechanism 3 can be a spring assembly, a linkage slider, or an automatic push rod mechanism, and its power source can be electric or pneumatic. However, considering manufacturing difficulty and precision issues, this embodiment uses, for example, a multi-link mechanism with built-in installation. The specific structure of the transmission mechanism 3 is as follows: The transmission mechanism 3 includes a transverse transmission wedge 31, a vertical transmission wedge 32, a wedge block assembly 33 fixed to the movable inner wall 15, and a wedge-shaped portion 241 provided on the anti-deflection guide rod section 24. Both ends of the vertical transmission wedge 32 are wedge-shaped surfaces, and both ends of the vertical transmission wedge 32 form a wedge-shaped transmission structure with the transverse transmission wedge 31 and the wedge block assembly 33, respectively; the other end of the transverse transmission wedge 31 forms a wedge-shaped transmission structure with the wedge-shaped portion 241. In this embodiment, the transmission mechanism 3 first converts the vertical movement of the inner winding bolt 2 into the horizontal movement of the horizontal transmission wedge 31 through a wedge-shaped transmission structure formed by the horizontal transmission wedge 31 and the wedge-shaped part 241. Then, it converts the horizontal movement of the horizontal transmission wedge 31 into the vertical movement of the vertical transmission wedge 32 through a wedge-shaped transmission structure formed by the horizontal transmission wedge 31 and the vertical transmission wedge 32. Finally, it converts the vertical movement of the vertical transmission wedge 32 into the horizontal movement of the wedge block assembly 33 through a wedge-shaped transmission structure formed by the vertical transmission wedge 32 and the wedge block assembly 33. The wedge block assembly 33 drives the movable inner wall 15 to contract towards the center, thereby fixing the stitch. Specifically, the wedge-shaped part 241 provided on the anti-deflection rod section 24 cooperates with the wedge-shaped surface at one end of the transverse transmission wedge 31. When the inner winding bolt 2 is screwed in downward, it can push the transverse transmission wedge 31 to slide outward. Then, by utilizing the cooperation between the wedge-shaped surface at the other end of the transverse transmission wedge 31 and the wedge-shaped surface at the bottom end of the vertical transmission wedge 32, the vertical transmission wedge 32 is pushed to slide upward. Furthermore, by utilizing the cooperation between the wedge-shaped surface at the other end of the vertical transmission wedge 32 and the wedge-shaped surface of the wedge block assembly 33, the wedge block assembly 33 is pushed to slide inward and drive the movable inner wall 15 connected to it to contract towards the center. This realizes the conversion of the downward screwing action of the inner winding bolt 2 into the contraction action of the movable inner wall 15 towards the center, so that the thread is tightly attached to the movable inner wall 15, achieving the fixing effect of the thread and completing the thread knotting work.

[0035] Meanwhile, to ensure that the movable inner wall 15 can fit snugly against the seam when the inner winding bolt 2 is fully screwed in, thus achieving a tight seal, in this embodiment, preferably, when the inner winding bolt 2 is inserted into the inner winding bolt hole 12 without winding, the bottom end of the wedge-shaped part 241 touches the transverse transmission wedge 31. The length of the wedge-shaped part 241 is equal to the length of the second external thread 22. Furthermore, the horizontal widths of the transverse transmission wedge 31, the vertical transmission wedge 32, the wedge block assembly 33, and the wedge-shaped surface of the wedge-shaped part 241 are all the same. And because the transmission mechanism 3 is located inside the outer fixing screw 1, it is necessary to first create a groove inside the outer fixing screw 1 for the transmission mechanism 3 to move. Specifically, the outer fixing screw 1 can be first moved along... Example

[0036] like Figure 5 As shown, this embodiment provides a structure for automatic reset of the wedge block assembly 33 based on embodiment 2. The specific structure is as follows: The wedge assembly 33 includes a return spring 331, a wedge-shaped member 332 with a cap, and a wedge-shaped groove 16 formed in the external fixing screw 1. The wedge-shaped member 332 with a cap is slidably disposed in the wedge-shaped groove 16, and one end of the return spring 331 is fixed to the wedge-shaped groove 16 and the other end of the return spring 331 is fixed to the cap of the wedge-shaped member 332 with a cap. In this embodiment, when the wedge-shaped member 332 with a cap is squeezed and moves towards the center, it will compress the return spring 331 and maintain the compressed state. When the inward pressure on the wedge-shaped member 332 with a cap disappears, the return spring 331 can recover under its own elastic force, and at the same time drive the wedge-shaped member 332 with a cap to move outward. Through the movement relationship between the transmission mechanism 3 and the structure, the entire transmission mechanism 3 is restored to the initial state before the stitching is knotted for secondary use.

[0037] One end of the wedge-shaped member 332 with the cap is fixed to the movable inner wall 15, and the other end of the wedge-shaped member 332 with the cap is a wedge-shaped surface, which together with the wedge-shaped surface of the vertical transmission wedge 32 forms a wedge-shaped transmission structure. In this embodiment, because the wedge block assembly 33 has the ability to automatically reset, when the inner winding bolt 2 is unscrewed, the wedge-shaped part 241 moves upward. At this time, the contact and compression relationship between it and the wedge-shaped surface of the transverse transmission wedge 31 is released, and under the action of the reset spring 331, the movable inner wall 15 expands outward. At the same time, the wedge-shaped surface of the wedge-shaped member 332 with the cap begins to press outward against the wedge-shaped surface of the vertical transmission wedge 32. The vertical transmission wedge 32 moves downward, and then the wedge-shaped surface at the bottom of the vertical transmission wedge 32 presses against the wedge-shaped surface of the transverse transmission wedge 31 that is in contact with it. The transverse transmission wedge 31 moves outward, thereby realizing the reset of the entire transmission mechanism 3. Example

[0038] This embodiment provides a method for knotting seams using a spiral-wound knotless seam fixing device. The specific steps are as follows: First, the external fixation screw 1 is screwed into the bone for fixation using a tool. One end of the suture is fixed to the soft tissue layer. Then, the other end of the suture is passed through the suture hole 21. Next, the inner winding bolt 2 is placed into the inner winding bolt hole 12, and the length of the suture at both ends of the suture hole 21 is adjusted. Both ends of the suture in the suture hole 21 must be inserted into the suture passage 14. After the suture is adjusted, the inner winding bolt 2 is screwed into the inner winding bolt hole 12. During the screwing process of the inner winding bolt 2, the suture will be wrapped around the winding section 23 of the inner winding bolt 2. At the same time, the movable inner wall 15 is contracted towards the center under the drive of the transmission mechanism 3. Finally, when the inner winding bolt 2 is screwed into place, the movable inner wall 15 is also just contracted to a state of close contact with the suture, thereby achieving the fixation of the suture and thus achieving the effect of knotting the suture. Furthermore, the spiral-wound knotless suture fixation device is not only suitable for soft tissue suturing, but can also be used for other medical procedures that require suture knotting. Example

[0039] like Figure 6 As shown, to prevent the thread from shifting left and right during the winding process, this embodiment provides a thread-pressing structure. A small threaded hole is opened inside the inner winding bolt 2, and a corresponding bolt is placed in this threaded hole. After the thread is adjusted and the inner winding bolt 2 is screwed into the inner winding bolt hole 12, the bolt is screwed downward and the bottom end of the bolt is used to secure it to the thread. In this way, the thread can be effectively pressed into the thread hole 21. At this time, the thread will not shift left and right during the winding work, thereby improving the accuracy of the thread knotting work. Example

[0040] To ensure the thread effectively wraps around the inner thread bolt 2 to form a connection, in this embodiment, preferably, the number of thread turns on the inner thread section 121 is 4 to 5, and the number of thread turns on the second outer thread 22 is the same as the number of thread turns on the inner thread section 121. In this case, the number of thread turns corresponds to the number of thread wrapping turns. Therefore, if the number of turns is too small, the thread connection effect will be poor; if the number of turns is too large, there will be too much thread in the thread-fixing groove 11, in which case the inner thread bolt 2 cannot fully enter the thread-fixing groove 11, thus affecting the stability of the thread connection.

[0041] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is 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. A spiral-wound knotless thread fixing device, characterized in that, The device includes an external fixing screw (1) and an internal winding bolt (2). The external fixing screw (1) has a wire-fixing groove (11) with its top end facing downward, and an internal winding bolt hole (12) with its bottom facing downward from the wire-fixing groove (11). The internal winding bolt (2) can be screwed into the internal winding bolt hole (12). The inner winding bolt (2) has a thread hole (21) for inserting the thread, and the thread can be spirally wound on the inner winding bolt (2). The groove wall of the thread-fixing groove (11) is provided with a thread passage (14) for the thread to enter the thread-fixing groove (11), and the thread enters the thread-fixing groove (11) through the thread passage (14) and then passes through the thread hole (21). The inner wall of the fixed groove (11) is a movable inner wall (15), and the movable inner wall (15) can shrink toward the center of the fixed groove (11); The two sutures divide the movable inner wall (15) into two movable inner wall pieces (15) through the opening (14). It also includes a transmission mechanism (3), with each of the two movable inner walls (15) connected to a transmission mechanism (3), and the two transmission mechanisms (3) are symmetrically arranged about the axis of the external fixing screw (1); The vertical movement of the inner winding bolt (2) is converted into the horizontal movement of the movable inner wall (15) by the transmission mechanism (3).

2. The spiral-wound knotless suture fixing device according to claim 1, characterized in that, The thread on the outer wall of the external fixation screw (1) is a first external thread (13), which is used to screw into the bone; The inner thread section (121) is provided in the inner winding bolt hole (12), and the inner thread is adapted to the second external thread (22) opened on the inner winding bolt (2). When the inner thread is engaged with the second external thread (22), the sewing hole (21) is located in the fixing groove (11).

3. The spiral-wound knotless suture fixing device according to claim 2, characterized in that, The second external thread (22) is located in the middle section of the inner winding bolt (2), and the winding section (23) is located above the second external thread (22), and the sewing hole (21) is located in the winding section (23).

4. The spiral-wound knotless suture fixing device according to claim 3, characterized in that, Below the second external thread (22) is an anti-deflection rod section (24), and below the internal thread section (121) is a rod hole (122), and the anti-deflection rod section (24) can be inserted into the rod hole (122).

5. A spiral-wound knotless suture fixing device according to claim 1, characterized in that, The transmission mechanism (3) includes a transverse transmission wedge (31), a vertical transmission wedge (32), a wedge block assembly (33) fixed to the movable inner wall (15), and a wedge-shaped part (241) provided on the anti-deflection light rod section (24). Both ends of the vertical transmission wedge (32) are wedge-shaped surfaces, and the two ends of the vertical transmission wedge (32) form a wedge-shaped transmission structure with the transverse transmission wedge (31) and the wedge block assembly (33), respectively. The other end of the transverse transmission wedge (31) and the wedge-shaped part (241) form a wedge-shaped transmission structure.

6. The spiral-wound knotless suture fixing device according to claim 5, characterized in that, When the inner winding bolt (2) is inserted into the inner winding bolt hole (12) and no winding is performed, the bottom end of the wedge (241) touches the transverse transmission wedge (31). The length of the wedge (241) is equal to the length of the second external thread (22).

7. A spiral-wound knotless suture fixing device according to claim 6, characterized in that, The wedge assembly (33) includes a return spring (331), a wedge-shaped member (332) with a cap, and a wedge-shaped groove (16) opened in the external fixing screw (1). The wedge-shaped member (332) with a cap is slidably disposed in the wedge-shaped groove (16), and one end of the return spring (331) is fixed to the wedge-shaped groove (16), and the other end of the return spring (331) is fixed to the cap of the wedge-shaped member (332). One end of the wedge-shaped member (332) of the belt cap is fixed to the movable inner wall (15), and the other end of the wedge-shaped member (332) of the belt cap is a wedge-shaped surface, which together with the wedge-shaped surface of the vertical transmission wedge (32) forms a wedge-shaped transmission structure.

Images