Kirschner wire
By designing a threaded structure and a limiting part on the Kirschner wire, the problems of Kirschner wire loosening and excessive insertion depth are solved, achieving stable fixation and safe operation, and adapting to different fracture conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 冯军粮
- Filing Date
- 2025-01-03
- Publication Date
- 2026-04-21
AI Technical Summary
Ordinary Kirschner wires on the market have a smooth surface, making them prone to loosening and displacement. Furthermore, inserting them too deeply may damage blood vessels or nerves, making it difficult to effectively fix fracture sites with existing Kirschner wires.
A Kirschner wire was designed, comprising an integrally formed elongated cylindrical needle bar and a triangular conical first needle head. The needle bar has a first external thread with an outer diameter equal to one-third of the needle bar length. The thread provides friction to secure the wire tightly, and the length is adjustable and a limiting part is provided to prevent the needle from being inserted too deeply.
Kirschner wires enhance fixation through their threaded structure, preventing loosening and displacement, ensuring a close fit to the fracture site, preventing excessive insertion that could damage vital tissues, and adapting to different fracture conditions.
Smart Images
Figure CN224140913U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a Kirschner needle. Background Technology
[0002] Kirschner wires are medical devices widely used in surgical procedures, primarily for treating fractures. When a fracture occurs, the doctor inserts a Kirschner wire into the fractured bone and then rotates it to fix it firmly in place at the fracture site, thereby stabilizing the fracture and preventing displacement.
[0003] However, ordinary Kirschner wires on the market have a smooth, columnar structure with relatively weak holding force, making them prone to loosening and displacement, which can lead to loss of fracture reduction. If the Kirschner wire is inserted too deeply, it may damage important parts of the joint, such as blood vessels and nerves. Utility Model Content
[0004] In view of the shortcomings of the existing technology, this utility model provides a Kirschner wire that can solve the above-mentioned technical problems.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a Kirschner needle, characterized in that it includes an integrally formed needle bar and a first needle head, wherein the needle bar is in the shape of a long cylindrical bar, the first needle head is in the shape of a triangular pyramid, the first needle head is disposed at one end of the needle bar, wherein one end of the needle bar is provided with a first external thread along its length direction, the outer diameter of the first external thread is equal to the outer diameter of the needle bar, and the length of the first external thread is equal to one-third of the length of the needle bar.
[0006] Preferably, the pitch of the first external thread is equal.
[0007] Preferably, the pitch of the first external thread gradually increases from one end of the needle bar along the other end of the needle bar.
[0008] Preferably, the pitch of the first external thread is set to gradually decrease from one end of the needle bar along the other end of the needle bar.
[0009] Preferably, the first needle tip has a first recess, and the first recess has a first through hole.
[0010] Preferably, the needle bar includes a first needle bar, a plurality of second needle bars and a third needle bar, wherein one end of the first needle bar is detachably connected to one end of the second needle bar, one end of the third needle bar is detachably connected to the other end of the second needle bar or one end of the first needle bar, and the first needle tip is disposed at the other end of the first needle bar, and the outer walls of the first needle bar and the second needle bars are provided with the first external thread.
[0011] Preferably, one end of the first needle bar is provided with a first receiving groove, the inner wall of the first receiving groove is provided with a first internal thread, wherein one end of the second needle bar is provided with a first protruding post received in the first receiving groove, and the first protruding post is provided with a second external thread that is threadedly connected to the first internal thread.
[0012] Preferably, the other end of the second needle bar is provided with a second receiving groove, the inner wall of the second receiving groove is provided with a second internal thread, wherein one end of the third needle bar is provided with a second protruding post received in the second receiving groove, and the second protruding post is provided with a third external thread that is threadedly connected to the second internal thread.
[0013] Preferably, the second protruding post of the third needle bar is further provided with a second needle head that is received in the second receiving groove and is in the shape of a cone, wherein the second protruding post is provided with a second recess, and the second needle head or the second recess is provided with a second through hole.
[0014] Preferably, it further includes a limiting part, wherein the limiting part is provided with a third through hole, and the third through hole is provided with a third internal thread that is threadedly connected to the first external thread.
[0015] Compared with existing technologies, this utility model provides a Kirschner wire with the following beneficial effects: The Kirschner wire disclosed in this utility model includes an integrally formed needle shaft and a first needle tip. The needle shaft is elongated cylindrical, and the first needle tip is triangular pyramidal. The first needle tip is located at one end of the needle shaft, and a first external thread is provided at one end of the needle shaft along its length. The outer diameter of the first external thread is equal to the outer diameter of the needle shaft, and the length of the first external thread is equal to one-third of the length of the needle shaft. Through this method, the first external thread on the Kirschner wire shaft of this utility model enables the Kirschner wire to have good holding force, preventing the Kirschner wire from moving at the fracture site and allowing it to fit tightly against the fracture site, thus aiding in patient recovery. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the first embodiment of the Kirschner wire of this utility model;
[0017] Figure 2 for Figure 1 Another structural diagram of the Kirschner wire;
[0018] Figure 3 This is a schematic diagram of the second embodiment of the Kirschner wire of this utility model. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] like Figure 1-2 As shown, the Kirschner wire provided by this utility model includes a needle bar 1 and a first needle tip 2.
[0021] The needle bar 1 and the first needle head 2 are integrally formed, wherein the needle bar 1 is a long cylindrical shape, and the first needle head 2 is a triangular pyramid shape, and the first needle head 2 is located at one end of the needle bar 1.
[0022] In this embodiment, one end of the needle bar 1 is provided with a first external thread 3 along its length, wherein the outer diameter of the first external thread 3 is equal to the outer diameter of the needle bar 1, and the length of the first external thread 3 is equal to one-third of the length of the needle bar 1. It should be understood that the Kirschner wire is fixed tightly at the fracture site by rotation, and the first external thread 3 can provide more friction to the Kirschner wire to ensure a tight fit between the Kirschner wire and the fracture site, preventing the Kirschner wire from being pulled out of the body due to pressure.
[0023] Preferably, the pitch of the first external thread 3 is equal.
[0024] Of course, in other embodiments, the pitch of the first external thread 3 gradually increases from one end of the needle bar 1 along the other end. It should be understood that the gradually increasing pitch of the first external thread 3 allows the Kirschner wire to achieve a tighter connection with the bone.
[0025] Alternatively, in other embodiments, the pitch of the first external thread 3 gradually decreases from one end of the needle shank 1 along the other end. It should be understood that the gradually decreasing pitch of the first external thread 3 allows the Kirschner wire to adapt to different inertia and impact forces, and the gradually decreasing first external thread 3 reduces the gap at the connection with the fracture site, thereby increasing the stability of the connection between the Kirschner wire and the fracture site.
[0026] Furthermore, such as Figure 3 As shown, in some embodiments, the first needle tip 2 is provided with a first recess, and a first insertion hole 21 is provided in the first recess. In some special cases (such as comminuted fractures), surgical sutures can also be inserted into the first insertion hole 21 through the Kirschner wire, so that the Kirschner wire can perform simple suturing at the fracture site, which is conducive to better connection of the broken bones.
[0027] Furthermore, the needle bar 1 includes a first needle bar 11, multiple second needle bars 12, and a third needle bar 13. One end of the first needle bar 11 is detachably connected to one end of the second needle bar 12, and one end of the third needle bar 13 is detachably connected to the other end of the second needle bar 12 or one end of the first needle bar 11. A first needle tip 2 is located at the other end of the first needle bar 11. The outer walls of both the first needle bar 11 and the second needle bar 12 are provided with a first external thread 3. In other words, the length of the Kirschner wire can be extended by connecting multiple second needle bars 12 between the first needle bar 11 and the third needle bar 13, depending on the patient's actual condition. Conversely, if it is necessary to shorten the Kirschner wire, the second needle bars 12 can be detached, and one end of the third needle bar 13 can be connected to one end of the first needle bar 11 to shorten the length of the Kirschner wire.
[0028] Preferably, one end of the first needle bar 11 is provided with a first receiving groove 111, and the inner wall of the first receiving groove 111 is provided with a first internal thread. One end of the second needle bar 12 is provided with a first protruding post 121 received within the first receiving groove 111, and the first protruding post 121 is provided with a second external thread 122 that is threadedly connected to the first internal thread. It should be understood that the second external thread 122 can mesh with the first internal thread, thereby connecting the second needle bar 12 and the first needle bar 11 together.
[0029] Preferably, the other end of the second needle bar 12 is provided with a second receiving groove 123, and the inner wall of the second receiving groove 123 is provided with a second internal thread. One end of the third needle bar 13 is provided with a second protruding post 131 received within the second receiving groove 123, and the second protruding post 131 is provided with a third external thread 132 that is threadedly connected to the second internal thread. It should be understood that the third external thread 132 can engage with the second internal thread, thereby allowing the second protruding post 131 to be tightly connected within the second receiving groove 123.
[0030] It is worth noting that the third external thread 132 in this embodiment can also be threadedly connected to the first internal thread, so that the second protruding post 131 is tightly connected in the first receiving groove 111.
[0031] Furthermore, the second protruding post 131 of the third needle bar 13 is also provided with a second needle tip 1311 that is conical and housed within the second receiving groove 123. The second protruding post 131 has a second recess 1312, and the second needle tip 1311 or the second recess 1312 has a second through hole 1313. Of course, the second needle tip 1311 can also be housed within the first receiving groove 111.
[0032] It should be understood that in certain cases where the required Kirschner wire is extremely short, the third needle rod 13 can be used directly for fixation. The second needle tip 1311 can also adopt a triangular pyramidal structure, and the third external thread 132 of the third needle rod 13 can also ensure a tight connection of the third needle rod 13 to the fracture site. Similarly, when the patient's fracture is severe enough that the Kirschner wire cannot be used directly, a suture can be inserted through the second through hole 1313 of the second needle tip 1311 to perform a simple suture at the fracture site before using the Kirschner wire for fixation. Alternatively, the outer wall of the third needle rod 13 can also be provided with external threads.
[0033] Furthermore, such as Figure 3 As shown, in other embodiments, the Kirschner wire further includes a limiting part 4, wherein the limiting part 4 has a third through hole, and the third through hole has a third internal thread that is threadedly connected to the first external thread 3, so that the position of the limiting part 4 can be changed by rotating the limiting part 4. It should be understood that the limiting part 4 is locked externally, and the Kirschner wire needs to be rotated into the patient's bone. The third internal thread of the limiting part 4 can engage with the first external thread 3 of the Kirschner wire. The distance to be inserted into the bone is set in advance, so that the limiting part 4 will stop the Kirschner wire from continuing to advance after the Kirschner wire has been inserted a certain distance, thereby avoiding problems such as damage to blood vessels and nerve irritation caused by the Kirschner wire being inserted too deeply.
[0034] Specific working principle:
[0035] When using this Kirschner wire, the length of the Kirschner wire can be adjusted according to the specific condition of the patient's fracture. If the fracture is too deep, multiple second rods 12 can be connected between the first rod 11 and the third rod 13 to make the overall length of the Kirschner wire meet the needs of the operation. If the fracture is shallow, the third rod 13 can be directly inserted into the fracture site for fixation without the need for other rods. When the Kirschner wire needs to be rotated into the bone, the distance between the fracture site and the skin surface can be calculated first. The limiting part 4 is then positioned on the first external thread 3 of the rod 1 according to the calculated distance. During the process of the Kirschner wire being inserted into the bone, the first external thread 3 on the rod 1 will make the Kirschner wire and the bone tightly connected through the friction of the thread itself. When the Kirschner wire is threaded through the fracture site, the limiting part 4 will be locked outside the patient's body, preventing the Kirschner wire from being inserted further, thus avoiding damage to important tissues such as blood vessels and nerves due to excessive insertion.
[0036] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A K-wire, characterized in that, The device includes an integrally formed needle bar and a first needle tip. The needle bar is in the shape of a long cylindrical bar, and the first needle tip is in the shape of a triangular pyramid. The first needle tip is disposed at one end of the needle bar, wherein one end of the needle bar is provided with a first external thread along its length direction. The outer diameter of the first external thread is equal to the outer diameter of the needle bar, and the length of the first external thread is equal to one-third of the length of the needle bar.
2. The K-wire of claim 1, wherein, The pitch of the first external thread is equal.
3. The K-wire of claim 1, wherein, The pitch of the first external thread gradually increases from one end of the needle bar along the other end of the needle bar.
4. The K-wire of claim 1, wherein, The pitch of the first external thread gradually decreases from one end of the needle bar along the other end of the needle bar.
5. The K-wire of claim 1, wherein, The first needle tip has a first recess, and a first through hole is provided in the first recess.
6. The K-wire of claim 1, wherein, The needle bar includes a first needle bar, a plurality of second needle bars, and a third needle bar, wherein one end of the first needle bar is detachably connected to one end of the second needle bar, one end of the third needle bar is detachably connected to the other end of the second needle bar or one end of the first needle bar, and the first needle tip is disposed at the other end of the first needle bar, and the outer walls of the first needle bar and the second needle bars are provided with the first external thread.
7. The K-wire of claim 6, wherein, The first needle bar has a first receiving groove at one end, and the inner wall of the first receiving groove has a first internal thread. The second needle bar has a first protruding post at one end that is received in the first receiving groove, and the first protruding post has a second external thread that is threadedly connected to the first internal thread.
8. The K-wire of claim 7, wherein, The other end of the second needle bar is provided with a second receiving groove, and the inner wall of the second receiving groove is provided with a second internal thread. One end of the third needle bar is provided with a second protruding post that is received in the second receiving groove, and the second protruding post is provided with a third external thread that is threadedly connected to the second internal thread.
9. The K-wire of claim 8, wherein, The second protruding post of the third needle bar is also provided with a second needle head that is received in the second receiving groove and is in the shape of a cone. The second protruding post is provided with a second recess, and the second needle head or the second recess is provided with a second through hole.
10. The K-wire of claim 9, wherein, It also includes a limiting part, wherein the limiting part is provided with a third through hole, and the third through hole is provided with a third internal thread that is threadedly connected to the first external thread.