Fixing needle and traction device matched with tibial tuberosity part

Abstract

The utility model relates to a fixing needle and a traction device matched with a tibial tuberosity part, the fixing needle comprises a needle body, the needle body is provided with a tip end, a threaded section and a tail end, the threaded section is located between the tip end and the tail end, and the threaded section is provided with a first section, a second section and a third section which are continuously arranged; wherein the first section is provided with a first external thread, the first thread major diameter of the first external thread is D1, the first thread height is H1, and the first thread pitch is L1; the second section is provided with a second external thread, the second thread major diameter of the second external thread is D2, the second thread height is H2, and the second thread pitch is L2; the third section is provided with a third external thread, the third thread major diameter of the third external thread is D3, the third thread height is H3, and the third thread pitch is L3; d1 = D2 = D3, H1 = H2 = H3, and L2 > = L1 = L3. According to the application, the fixation and traction of the tibial tuberosity part are realized.

Description

Technical Field

[0001] This application belongs to the field of orthopedic medical device technology, specifically relating to a fixation pin and traction device adapted to the tibial tuberosity. Background Technology

[0002] The tibial tuberosity is an important component of the knee joint, and many knee fractures, especially tibial tuberosity fractures, require internal fixation. Currently, commonly used fixation devices such as screws and plates face significant challenges when dealing with special areas like the tibial tuberosity.

[0003] Due to the complex anatomical structure of the tibial tuberosity, traditional fixation methods such as screws or plates often fail to provide a tight fit to the bone surface, resulting in unsatisfactory fixation and problems such as difficulty in reduction, unstable fixation leading to postoperative loosening or displacement, and a high rate of postoperative complications. Furthermore, the frictional heat generated during the implantation of conventional screws or plates can cause thermal damage to bone tissue, affecting fracture healing. Excessively high temperatures can also damage bone cells, hindering fracture healing and even leading to osteonecrosis, increasing the risk of postoperative complications. In addition, the tips of existing fixation pins may damage surrounding soft tissues or nerves during surgery, and if the tips are exposed postoperatively, it may cause discomfort or injury. Utility Model Content

[0004] In view of the above analysis, the present invention aims to provide a fixation pin and traction device adapted to the tibial tuberosity, so as to solve one or more of the above-mentioned problems existing in the prior art.

[0005] The purpose of this utility model is achieved as follows:

[0006] On one hand, a fixation pin adapted to the tibial tuberosity is provided, comprising a pin body having a tip, a threaded section, and a tail end, the threaded section being located between the tip and the tail end, and having a connection to the instruction manual ZSU240839CN.

[0007] The system is further divided into a first segment, a second segment, and a third segment. The first segment has a first external thread with a first thread major diameter of D1, a first thread height of H1, and a first thread pitch of L1. The second segment has a second external thread with a second thread major diameter of D2, a second thread height of H2, and a second thread pitch of L2. The third segment has a third external thread with a third thread major diameter of D3, a third thread height of H3, and a third thread pitch of L3. D1 = D2 = D3, H1 = H2 = H3, and L2 ≥ L1 = L3.

[0008] Furthermore, D1 = D2 = D3 = 6 mm; H1 = H2 = H3 = 1.2 mm; L2 = 1.3 mm, L1 = L3 = 1.0 mm.

[0009] Furthermore, the first external thread, the second external thread, and the third external thread are all negative angle threads.

[0010] Furthermore, the inclination angle of the negative angle thread is -5°.

[0011] Furthermore, a first smooth rod segment is provided between the tip and the first segment; a second smooth rod segment is provided between the tail end and the third segment.

[0012] Furthermore, the first smooth rod segment is provided with a breakage groove, which is configured to allow the tip to be broken off postoperatively using a breakage tool.

[0013] Furthermore, the tail end is provided with an irregular structure, which is adapted to the surgical tool, and the surgical tool realizes the rotation operation of the needle body through the irregular structure.

[0014] Furthermore, the tip is a conical spike.

[0015] On the other hand, a traction device adapted to the tibial tuberosity is also provided, comprising:

[0016] The aforementioned fixation pin, adapted for the tibial tuberosity, is used to pass through the tibial tuberosity.

[0017] Kirschner wires for the calcaneus are used to pass through the calcaneus.

[0018] The fixed support mechanism has an upper fixed end and a lower fixed end. The upper fixed end is used to fix the two ends of the fixed pin that passes through the tibial tuberosity, and the lower fixed end is used to fix the two ends of the calcaneal Kirschner wire that passes through the calcaneus.

[0019] Furthermore, the fixed support mechanism also has two sets of parallel telescopic support rod assemblies, the length of which is adjustable; the top end of each telescopic support rod assembly is provided with a top adapter, and the bottom end of each telescopic support rod assembly is provided with a bottom adapter; the specifications for the two top adapters are ZSU240839CN.

[0020] Together they form the upper fixed end; the two bottom adapters together form the upper fixed end.

[0021] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0022] a) The fixation pin adapted for the tibial tuberosity provided by this utility model optimizes the thread structure on the pin body according to the different densities of the bone, enabling the fixation pin to closely conform to the bone surface, providing a precise reduction effect and ensuring stable healing of the fracture fragments in the correct position. Specifically, the threaded section on the pin body adopts a three-section thread structure with small pitch at both ends and large pitch in the middle. This not only allows the fixation pin to make closer contact with the bone, improving the stability of fixation and effectively reducing the risk of postoperative loosening or displacement, ensuring stable reduction during the operation, but also reduces the heat generated by friction during implantation, thereby avoiding thermal damage to the bone, maximizing the protection of bone tissue health, increasing surgical safety, promoting rapid fracture healing, reducing postoperative complications, and avoiding various adverse reactions that occur during traditional surgery.

[0023] b) The fixation pin adapted to the tibial tuberosity provided by this utility model has a breakable tip. After implantation, the tip can be safely broken off, avoiding damage to surrounding soft tissues or other anatomical structures caused by the tip protruding. This increases the safety of the surgery and also reduces postoperative discomfort and complications.

[0024] c) The fixation pin adapted for the tibial tuberosity provided by this utility model has an irregularly shaped operating end that can better integrate with surgical instruments, facilitating the surgeon to quickly and stably complete the fixation operation during surgery. The irregular design enhances the stability of the fixation, avoids displacement or loosening of the pin during surgery, and improves the overall efficiency of the surgery.

[0025] d) The traction device adapted to the tibial tuberosity provided by this utility model adopts a height-adjustable fixation support mechanism, which can provide stable support for the fixation pin and the calcaneal Kirschner wire. It is easy to operate and the height adjustment is flexible. Moreover, the use of fixation pins adapted to the tibial tuberosity makes closer contact with the bone, improves the stability of fixation, ensures stable reduction during operation, and can also avoid thermal damage to the bone, increase the safety of the operation, promote rapid fracture healing, and reduce postoperative complications. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the structure of the fixation pin adapted to the tibial tuberosity region provided by this utility model Figure 1 ;

[0028] Figure 2 Schematic diagram of the structure of the fixation pin adapted to the tibial tuberosity region provided by this utility model Figure 2 ;

[0029] Figure 3 A schematic diagram of the threaded section of the fixation pin adapted to the tibial tuberosity region provided by this utility model;

[0030] Figure 4 A schematic diagram of the structure of the traction device adapted to the tibial tuberosity provided by this utility model;

[0031] Figure 5 for Figure 4 Schematic diagram of the structure of region A in the middle;

[0032] Figure 6 A schematic diagram of the implementation state of the traction device adapted to the tibial tuberosity provided by this utility model.

[0033] Figure label:

[0034] 100. Fixing pin;

[0035] 1. Tip; 2. Threaded section; 201. First section; 202. Second section; 203. Third section; 3. Tail end; 4. First polished section; 5. Second polished section; 6. Breaking ring groove; 7. Breaking tool; 8. Calcaneal Kirschner wire; 9. Telescopic support rod assembly; 901. Upper screw; 902. Lower screw; 903. Threaded sleeve; 904. Top adapter; 905. Bottom adapter; 10. Calcaneal region; 11. Tibial tuberosity region. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0037] Instruction manual ZSU240839CN

[0038] It is obvious that the described embodiments are only a part of the embodiments of this application, not all of them. It should be noted that, unless otherwise specified, the implementation methods and features in these implementation methods can be combined, separated, interchanged, and / or rearranged. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0040] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0041] For descriptive purposes, this disclosure may use spatial relative terms such as “top,” “bottom,” “below,” “under,” “under,” “below,” “above,” “above,” “higher,” etc., which are relative to components, to describe the relationship between one component and another (other) component as shown in the accompanying drawings.

[0042] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as in specification ZSU240839CN…

[0043] As used herein, the terms “substantially,” “approximately,” and other similar terms are used as approximate terms rather than as terms of degree, so that they are used to explain the inherent biases of measured, calculated, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0044] Example 1

[0045] A specific embodiment of this utility model is as follows: Figures 1 to 3As shown, a fixation needle adapted to the tibial tuberosity is disclosed, hereinafter referred to as "fixation needle 100", including a needle body. The needle body has a tip 1, a threaded section 2 and a tail end 3. The threaded section 2 is located between the tip 1 and the tail end 3. The threaded section 2 adopts a three-segment thread structure, having a first segment 201, a second segment 202 and a third segment 203 arranged continuously. The first segment 201, the second segment 202 and the third segment 203 are arranged sequentially from the tip 1 to the tail end 3.

[0046] The first segment 201 is provided with a first external thread, the first thread major diameter of the first external thread is D1, the first thread height is H1, and the first thread pitch is L1; the second segment 202 is provided with a second external thread, the second thread major diameter of the second external thread is D2, the second thread height is H2, and the second thread pitch is L2; ​​the third segment 203 is provided with a third external thread, the third thread major diameter of the third external thread is D3, the third thread height is H3, and the third thread pitch is L3; D1=D2=D3, H1=H2=H3, L2≥L1=L3.

[0047] In one optional embodiment, the external thread parameters of the first segment 201, the second segment 202, and the third segment 203 are as follows: D1 = D2 = D3 = 6mm; H1 = H2 = H3 = 1.2mm; L2 = 1.3mm, L1 = L3 = 1.0mm. Further, the length of the first segment 201 is W1, the length of the second segment 202 is W2, and the length of the third segment 203 is W3, and 1 / 4W2 ≤ W1 = W3 ≤ 1 / 3W2

[0048] In one alternative embodiment, the first external thread, the second external thread, and the third external thread are all negative angle threads. Preferably, the inclination angle of the negative angle thread is -5°. Using this inclination angle of the negative angle thread, in conjunction with the external thread parameters of the first segment 201, the second segment 202, and the third segment 203, can further enhance the close contact between the fixation pin 100 and the bone, improve the stability of fixation, and avoid thermal damage to the bone.

[0049] In this example, a first optical rod segment 4 is provided between the tip 1 of the needle body and the first segment 201; a second optical rod segment 5 is provided between the tail end 3 of the needle body and the third segment 203. Optionally, the first optical rod segment 5 is described in the instruction manual ZSU240839CN.

[0050] The length of rod segment 4 is greater than or equal to the length of the second polished rod segment 5, and the length of threaded segment 2 is equal to 1 / 2 to 3 / 5 of the length of the second polished rod segment 5.

[0051] In this embodiment, the first smooth rod segment 4 is provided with a breakage groove 6. The breakage groove 6 is configured to allow the tip 1 to break off postoperatively. The breakage groove 6 serves as the boundary between the tip 1 and the first smooth rod segment 4. After the surgery, excess needle tip can be broken off, avoiding damage to surrounding soft tissues, nerves, or blood vessels, thus increasing the safety of the surgery.

[0052] Furthermore, the fixation needle 100 is also equipped with a breaking tool 7, which is used to break the tip 1 at the breaking annular groove 6 after the operation. For example, the breaking tool 7 is a closed hollow tubular structure that can be fitted onto the tip 1, and when the breaking tool 7 is fitted onto the tip 1, the breaking annular groove 6 is located on the outside of the breaking tool 7.

[0053] In this embodiment, the tail end 3 of the needle body has an irregularly shaped structure. This irregularly shaped structure is adapted to the surgical tool, which uses this structure to rotate the needle body. In this embodiment, the irregularly shaped structure means that the outer wall of the tail end of the needle body is not a regular cylinder, and the radial cross-section of the tail end is not circular. For example, the cross-section of the tail end can be made non-circular through cutting operations. This facilitates the tightening and unscrewing of the fixing needle 100 when used with the surgical tool. By providing an irregularly shaped structure at the tail end of the fixing needle, it is easier to combine with the surgical tool during the surgical procedure, ensuring the convenience and efficiency of the surgery. The surgeon can complete the surgical procedure more quickly and stably, improving the overall efficiency of the surgery and reducing the surgical time.

[0054] Optionally, the tail end 3 of the needle body is blunted, or the tail end 3 of the needle body is designed as a breakable structure, similar to the breakable structure of the tip 1. By blunting the tail end of the needle body or breaking off the tail end 3 after surgery, the exposed tail end can be prevented from puncturing the patient or causing postoperative discomfort.

[0055] In this embodiment, the tip 1 of the needle body is a conical spiky end. This structural design allows the fixation needle to generate a gradually increasing pressure distribution when penetrating the bone, which can reduce the damage to the bone and soft tissues caused by the spiky end during the initial puncture, reduce local stress concentration, and prevent secondary damage to the fracture site. Especially when passing through areas with dense muscles, ligaments, or nerves, it can effectively reduce the risk of postoperative pain and complications.

[0056] Instruction manual ZSU240839CN

[0057] This embodiment also provides a traction device adapted to the tibial tuberosity region, such as... Figures 4 to 6As shown, it includes a fixation pin 100, a calcaneal Kirschner wire 8, and a fixation support mechanism; wherein, the fixation pin 100 adapted to the tibial tuberosity is used to pass through the tibial tuberosity 11; the calcaneal Kirschner wire 8 is used to pass through the calcaneal 10; the fixation support mechanism has an upper fixation end and a lower fixation end, the upper fixation end is used to fix the two ends of the fixation pin 100 passing through the tibial tuberosity, and the lower fixation end is used to fix the two ends of the calcaneal Kirschner wire 8 passing through the calcaneal 10.

[0058] In this embodiment, the calcaneal Kirschner wire 8 can be a regular Kirschner wire or a bone wire with the same or similar structure as the fixation pin 100. For example, the calcaneal Kirschner wire 8 is also provided with a breakage groove so that the tip of the calcaneal Kirschner wire 8 can be broken off after surgery; the calcaneal Kirschner wire 8 is also provided with a threaded section, which can also adopt a three-section thread structure, which will not be described in detail here.

[0059] In this embodiment, the fixed support mechanism also has two sets of parallel telescopic support rod assemblies 9, the length of which is adjustable; the top end of the telescopic support rod assembly 9 is provided with a top adapter 904, and the bottom end of the telescopic support rod assembly 9 is provided with a bottom adapter 905; the two top adapters 904 together constitute the upper fixed end; the two bottom adapters 905 together constitute the upper fixed end.

[0060] In one alternative embodiment, the telescopic support rod assembly 9 includes two screws, namely an upper screw 901 and a lower screw 902. The two screws are connected by a threaded sleeve 903, and the length of the telescopic support rod assembly 9 can be adjusted by screwing.

[0061] In one alternative embodiment, the top adapter 904 has a first mounting port and a second mounting port. The first mounting port can clamp the top end of the upper screw 901 of the telescopic support rod assembly 9, and the second mounting port can clamp the needle body. The bottom adapter 905 has a third mounting port and a fourth mounting port. The third mounting port can clamp the bottom end of the lower screw 902 of the telescopic support rod assembly 9, and the fourth mounting port can clamp the calcaneal Kirschner wire 8.

[0062] It should be noted that the top adapter 904 and the bottom adapter 905 can have the same structure, capable of clamping both the needle and the screw simultaneously, which can be achieved using adapters with existing technology.

[0063] Compared with the prior art, the fixation pin and traction instruction manual for the tibial tuberosity region provided in this embodiment are ZSU240839CN

[0064] The device has the following beneficial effects:

[0065] 1. The threaded structure of the fixation pin is optimized according to the different densities of bone, allowing the pin to closely conform to the bone surface, providing precise reduction and ensuring stable healing of the fracture fragments in the correct position. Specifically, the threaded section of the pin adopts a three-section threaded structure with small pitch at both ends and large pitch in the middle. This not only allows the fixation pin to make closer contact with the bone, improving fixation stability and effectively reducing the risk of postoperative loosening or displacement, ensuring stable reduction during the operation, but also reduces the heat generated by friction during implantation, thereby avoiding thermal damage to the bone, maximizing the protection of bone tissue health, increasing surgical safety, promoting rapid fracture healing, reducing postoperative complications, and avoiding various adverse reactions that occur during traditional surgery.

[0066] 2. The tip of the fixation needle is designed to be breakable. After implantation, the tip can be safely broken off, avoiding damage to surrounding soft tissues or other anatomical structures caused by the tip protruding. This increases the safety of the surgery and also reduces postoperative discomfort and complications.

[0067] 3. The tail end of the fixation needle has a uniquely shaped structure, which allows for better integration with surgical instruments, facilitating quick and stable fixation during surgery. This unique design enhances fixation stability, preventing needle displacement or loosening during the procedure and improving overall surgical efficiency.

[0068] 4. The height-adjustable fixation support mechanism provides stable support for the fixation pins and calcaneal Kirschner wires, making operation convenient and height adjustment flexible. Moreover, the use of fixation pins adapted to the tibial tuberosity site allows for closer contact with the bone, improving fixation stability, ensuring stable reduction during surgery, and avoiding thermal damage to the bone, thus increasing surgical safety, promoting rapid fracture healing, and reducing postoperative complications.

[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A fixation pin for adapting to a tibial tuberosity site, characterized by, Includes a needle body having a tip (1), a threaded section (2) and a tail end (3), the threaded section (2) being located between the tip (1) and the tail end (3), and having a first section (201), a second section (202) and a third section (203) arranged in succession; The first segment (201) is provided with a first external thread, the first thread major diameter of the first external thread is D1, the first thread height is H1, and the first thread pitch is L1; The second segment (202) is provided with a second external thread, the major diameter of the second external thread is D2, the second thread height is H2, and the second thread pitch is L2; The third segment (203) is provided with a third external thread, the major diameter of the third external thread is D3, the third thread height is H3, and the third thread pitch is L3; D1=D2=D3, H1=H2=H3, L2≥L1=L3.

2. The fixation pin for adapting to a tibial tubercle site according to claim 1, wherein D1=D2=D3=6mm; H1=H2=H3=1.2mm; L2=1.3mm, L1=L3=1.0mm.

3. The fixation pin for adapting to a tibial tubercle site according to claim 2, wherein The first external thread, the second external thread, and the third external thread are all negative angle threads.

4. The fixation pin for adapting to a tibial tubercle site according to claim 3, wherein The inclination angle of the negative angle thread is -5°.

5. The fit-adapted tibial tubercle site fixation pin according to any one of claims 1 to 4, characterized in that The tip (1) has a first smooth section (4) between it and the first segment (201); the tail end (3) has a second smooth section (5) between it and the third segment (203).

6. The fixation pin for adapting to a tibial tubercle site according to claim 5, wherein The first smooth rod segment (4) is provided with a breakage groove (6), which is configured to allow the tip (1) to be broken off by a breakage tool (7) after surgery.

7. The fixation pin for adapting a tibial tubercle site according to claim 1, wherein The tail end (3) is provided with an irregular structure, which is adapted to the surgical tool. The surgical tool realizes the rotation operation of the needle body through the irregular structure.

8. The fixation pin for adapting to a tibial tubercle site according to claim 1, wherein The tip (1) is a conical spike.

9. A traction device adapted to the tibial tuberosity site, characterized in that, include: The fixation pin adapted to the tibial tuberosity as described in any one of claims 1 to 8 is used to pass through the tibial tuberosity (11); Kirschner wires (8) are used to pass through the calcaneus (10); The fixed support mechanism has an upper fixed end and a lower fixed end. The upper fixed end is used to fix the two ends of the fixed pin that passes through the tibial tuberosity, and the lower fixed end is used to fix the two ends of the calcaneal Kirschner wire (8) that passes through the calcaneus.

10. The traction device of claim 9, wherein, The fixed support mechanism also has two sets of parallel telescopic support rod assemblies (9), the length of which is adjustable; the top of the telescopic support rod assembly (9) is provided with a top adapter (904), and the bottom of the telescopic support rod assembly (9) is provided with a bottom adapter (905). The two top adapters (904) together constitute the upper fixed end; the two bottom adapters (905) together constitute the upper fixed end.

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