A k-wire

Abstract

The utility model provides a kind of kirschner wire, including needle, the needle includes needle body and needle tip, the needle tip is hemispherical, hemispherical kirschner wire realizes the high-speed grinding of kirschner wire, avoids the skidding of kirschner wire, simultaneously, when kirschner wire is placed into the medullary cavity in pedicle of vertebral arch, hemispherical needle head can avoid nerve or tissue in medullary cavity to suffer severe damage, greatly improve the security and reliability of the utility model.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a Kirschner wire. Background Technology

[0002] Kirschner wires, widely used bone fixation instruments in orthopedic surgery, are mainly used for temporary fixation of fracture reduction, skeletal traction, and bone block positioning in arthroplasty. Currently, most Kirschner wires used clinically have a triangular or conical tip structure, and their working principle relies on the tip's rotational cutting or axial advancement to penetrate the bone cortex. However, this traditional design has some significant drawbacks in practical applications: the triangular or conical tip is prone to stress concentration when in contact with the bone surface, especially in areas of osteoporosis or hard bone. The uneven distribution of the friction coefficient between the needle tip and the bone surface leads to frequent axial slippage during surgery, which not only prolongs the operation time but may also cause bone tunnel enlargement due to repeated punctures, affecting fixation stability; moreover, the sharp edge of the traditional tip may cut intramedullary vessels and nerve bundles during puncture, especially in anatomically complex areas such as the proximal femur or spine.

[0003] Therefore, there is an urgent need to develop a new type of Kirschner wire that comprehensively addresses key technical bottlenecks such as slippage control, tissue protection, and operational precision from a structural design perspective, in order to meet the clinical needs of minimally invasive orthopedic surgery for low-trauma and highly reliable implantable devices.

[0004] Therefore, the existing technology still needs further development. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a Kirschner wire to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned technical objectives, this utility model provides a Kirschner wire, comprising:

[0007] The needle includes a needle body and a needle tip, wherein the needle tip is hemispherical.

[0008] Specifically, the needle body is axially symmetrically distributed, and both sides of the needle body are provided with double-sided cutting edges and chip removal grooves, with the double-sided cutting edges and chip removal grooves adjacent to each other.

[0009] Specifically, the double-sided cutting edge is used to cut bone, and the chip removal groove is used to remove bone debris.

[0010] Specifically, the double-sided cutting edges are symmetrically distributed on both sides of the needle tip, and the chip removal grooves are symmetrically distributed on both sides of the needle tip.

[0011] Specifically, the chip removal groove extends along the axial direction of the needle and is fixedly connected to the double-sided cutting edge.

[0012] Specifically, the Kirschner wire also includes a needle body, which is fixedly connected to the needle tip, and the depth of the chip removal groove gradually increases from the needle tip towards the needle body.

[0013] Specifically, both the needle body and the needle tip are cylindrical, and the cross-sectional diameter of the needle body is larger than the cross-sectional diameter of the needle tip.

[0014] Specifically, the needle body and the needle tip are fixedly connected by welding.

[0015] Beneficial effects:

[0016] This invention provides a Kirschner wire, including a needle head, which comprises a needle head body and a needle tip. The needle tip is hemispherical. The hemispherical shape of the Kirschner wire enables high-speed grinding of the Kirschner wire and avoids slippage. At the same time, when the Kirschner wire is inserted into the medullary cavity of the pedicle, the hemispherical needle head can prevent serious damage to the nerves or tissues in the medullary cavity, thus greatly improving the safety and reliability of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the Kirschner wire structure provided in a specific embodiment of this utility model;

[0018] Figure 2 This is a front view of the Kirschner wire provided in a specific embodiment of this utility model;

[0019] Figure 3 This is a top view of the Kirschner wire provided in a specific embodiment of this utility model;

[0020] Figure 4 This is a three-dimensional view of the Kirschner wire provided in a specific embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of Kirschner wire insertion into the pedicle provided in a specific embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the cutting channel of the Kirschner wire provided in a specific embodiment of this utility model;

[0023] The above figures include the following reference numerals:

[0024] 1. Needle body; 2. Needle tip; 3. Cutting channel; 21. Double-sided cutting edge; 22. Chip removal groove; 23. Needle tip body; 24. Needle tip. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, the directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the creation of this utility model.

[0026] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0027] Please see Figures 1-6 This embodiment provides a Kirschner needle, including a needle head 2, which includes a needle head body 23 and a needle tip 24, wherein the needle tip 24 is hemispherical.

[0028] It is understood that the Kirschner wire in this embodiment is a ball-tipped Kirschner wire that can be ground at high speed. Most conventional Kirschner wires are triangular or conical, and are inserted into the bone by rotating or slowly advancing the tip. Due to the small contact area between the sharp tip and the bone surface, lateral slippage is likely to occur during high-speed rotation, resulting in a decrease in grinding positioning accuracy. Furthermore, the edges or conical tips are prone to shearing damage to soft tissues such as intramedullary nerves and vascular bundles during rotation. In contrast, the tip of the needle in this invention is hemispherical, which solves the technical problems of Kirschner wire slippage and the risk of intramedullary nerve or tissue damage caused by the tip, greatly ensuring the safety of the patient's surgery.

[0029] See Figures 2-4 In this embodiment of the Kirschner wire, the needle body 23 is axially symmetrically distributed, and both axial sides of the needle body 23 are provided with double-sided cutting edges 21 and chip removal grooves 22, with the double-sided cutting edges 21 and chip removal grooves 22 adjacent to each other. The double-sided cutting edges 21 are used to cut bone, and the chip removal grooves 22 are used to remove bone fragments.

[0030] See Figure 4 The double-sided cutting edge 21 and the chip removal groove 22 are symmetrically distributed on both sides of the needle head 2. The chip removal groove 22 extends along the axial direction of the needle head 2 and is fixedly connected to the double-sided cutting edge 21. The Kirschner needle also includes a needle body 1, which is fixedly connected to the needle head 2. The depth of the chip removal groove 22 gradually increases from the needle tip 24 toward the needle body 1.

[0031] With the above technical solution, the double-sided cutting edges 21 are symmetrically distributed on both sides of the needle tip 2, resulting in a uniform distribution of cutting force. This not only improves cutting efficiency but also reduces deviation or slippage caused by uneven force on one side, ensuring the stability of the cutting process. The chip removal groove 22 extends along the axial direction of the needle tip 2, ensuring that the chips generated during the cutting process can be smoothly discharged, avoiding clogging problems caused by chip accumulation, and maintaining a smooth cutting process. The depth of the chip removal groove gradually increases from the needle tip 24 towards the needle body 1. This helps to better accommodate and discharge chips generated at different stages. That is, the chip removal groove near the needle tip is shallower, which facilitates initial cutting, while the chip removal groove near the needle body is deeper, which can handle more chips and prevent clogging.

[0032] See Figure 4 In this embodiment of the Kirschner wire, both the needle body 1 and the needle tip body 23 are cylindrical. The cross-sectional diameter of the needle body 1 is larger than the cross-sectional diameter of the needle tip body 23, which further improves the stability of the Kirschner wire after it is inserted into the pedicle in this embodiment.

[0033] Preferably, in this embodiment, the needle body 1 and the needle tip 2 of the Kirschner needle are fixedly connected by welding.

[0034] It is understood that in this embodiment of the Kirschner wire, the double-sided cutting edge 21 is located at the end of the needle tip 2, and has a sharp cutting edge. The chip removal groove 22 is located at the end of the needle tip 2. During the cutting process, the generated bone chips are smoothly discharged through the chip removal groove 22, avoiding the blockage problem caused by bone chip accumulation and improving surgical efficiency. The chip removal groove 22 extends along the needle tip 2 and closely cooperates with the double-sided cutting edge 21 to ensure a smooth cutting process. The double-sided cutting edge 21 and the chip removal groove 22 are adjacent to each other and work together to complete the functions of cutting and chip removal. The needle tip 24 has a hemispherical design. This design can reduce the risk of damage to nerves or other tissues when the Kirschner wire accidentally penetrates into the medullary cavity. If the Kirschner wire is inserted to a depth beyond the plan and enters the medullary cavity, the hemispherical needle tip 2 can act as a buffer to avoid the sharp edge causing serious damage to the nerves or tissues in the medullary cavity, greatly increasing the safety of the operation, reducing the risk of complications, solving the technical problem of slippage of traditional triangular or conical Kirschner wires, and further avoiding damage to the patient's intramedullary nerves or tissues caused by the sharp tip.

[0035] Preferably, in this embodiment, the Kirschner wire can be made of medical alloy steel.

[0036] See Figures 5-6In this embodiment, the working process of the Kirschner wire includes: during operation, when the Kirschner wire is driven to rotate at high speed by an electric drill or other driver, the bone chips generated during the cutting process are smoothly discharged through the chip removal groove 22, avoiding the blockage problem caused by the accumulation of bone chips and improving the efficiency of the operation. Under the action of the double-sided cutting edge 21, the bone on the chip channel 3 is finally left in the pedicle. The Kirschner wire is removed after guiding the insertion of the pedicle screw. If the depth of the Kirschner wire insertion exceeds the planned position and enters the medullary cavity, its hemispherical needle tip 24 can avoid serious damage to the nerves or tissues in the medullary cavity, thereby further protecting the patient from accidental injury and increasing the safety of the operation.

[0037] It should be noted that this embodiment provides a Kirschner wire, including a needle body and a needle tip, which are fixedly connected. The needle tip includes a needle body and a needle tip, which is hemispherical. This enables high-speed grinding of the Kirschner wire and avoids slippage. At the same time, when the Kirschner wire is inserted into the medullary cavity of the pedicle, the hemispherical needle tip can prevent serious damage to the nerves or tissues in the medullary cavity, thus greatly improving the safety and reliability of this invention.

[0038] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0039] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A Kirschner wire, characterized in that, include: The needle (2) includes a needle body (23) and a needle tip (24), the needle tip (24) being hemispherical.

2. The Kirschner wire according to claim 1, characterized in that, The needle body (23) is axially symmetrically distributed. Both sides of the needle body (23) are provided with double-sided cutting edge (21) and chip removal groove (22). The double-sided cutting edge (21) and chip removal groove (22) are adjacent to each other.

3. The Kirschner wire according to claim 2, characterized in that, The double-sided cutting edge (21) is used to cut bone, and the chip removal groove (22) is used to remove bone debris.

4. The Kirschner wire according to claim 2, characterized in that, The double-sided cutting edge (21) is symmetrically distributed on both sides of the needle (2), and the chip removal groove (22) is symmetrically distributed on both sides of the needle (2).

5. The Kirschner wire according to claim 4, characterized in that, The chip removal groove (22) extends along the axial direction of the needle (2) and is fixedly connected to the double-sided cutting edge (21).

6. The Kirschner wire according to claim 5, characterized in that, The Kirschner wire also includes a needle body (1), which is fixedly connected to the needle tip (2), and the depth of the chip removal groove (22) gradually increases from the needle tip (24) toward the needle body (1).

7. The Kirschner wire according to claim 6, characterized in that, Both the needle body (1) and the needle tip body (23) are cylindrical, and the cross-sectional diameter of the needle body (1) is larger than the cross-sectional diameter of the needle tip body (23).

8. The Kirschner wire according to claim 6, characterized in that, The needle body (1) and the needle tip (2) are fixedly connected by welding.

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