A metal intramedullary fixation needle

Abstract

This utility model discloses a metal intramedullary fixation needle, including a needle shaft. One end of the needle shaft is fixedly connected to a striking cap. Positioning holes are provided at both ends of the needle shaft. The other end of the needle shaft has a first transition section. One end of the first transition section is fixedly connected to a first stage rod. One end of the first stage rod is fixedly connected to a second transition section. One end of the second transition section is fixedly connected to a second stage rod. One end of the second stage rod is fixedly connected to a third transition section. One end of the third transition section is fixedly connected to a third stage rod. A conical head is fixedly connected to the end of the third stage rod. The surface of the conical head has a dividing groove, allowing for hammering installation and side-mounting with rivets. Furthermore, by using stage rods and transition sections of different diameters in stages, smooth insertion and installation are ensured, effectively reducing installation resistance and facilitating precise and efficient positioning.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more specifically, to a metal intramedullary fixation needle. Background Technology

[0002] Intramedullary nailing is a surgical procedure in which a suitable-sized and long intramedullary nail is inserted into the medullary cavity on both sides of the fracture site to fix the fracture. Intramedullary nails come in different types, such as "V"-shaped, quincunx-shaped, and triangular. "V"-shaped, quincunx-shaped, and triangular intramedullary nails are suitable for fractures of long bones; three-winged nails are suitable for femoral neck fractures; and Kirschner wires are commonly used for short bone fractures of the hands and feet.

[0003] The utility model with authorization announcement number CN 217593028 U relates to the field of medical device technology, specifically to a spherical surface (22) and a metal intramedullary fixation needle, including a tailstock, a needle bar A, a spherical surface (22) B of the needle bar, a needle tip A and a needle tip B; the tailstock is arranged horizontally; the two ends of the tailstock are respectively connected to the needle bar A and the needle bar B by spherical surfaces (22); the needle bar A and the needle bar B are arranged vertically downward with spherical surfaces (22) below the two ends of the tailstock; the tailstock and the needle bar A and the needle bar B form a U-shaped spherical surface (22) structure; the length of the needle bar A is greater than the length of the needle bar B; the head of the needle bar A is provided with a needle tip A on the spherical surface (22); the head of the needle bar B is provided with a needle tip B; the needle tip A and the spherical surface (22) and the needle tip B are set in a conical structure, which solves the problem that the existing intramedullary needle operation spherical surface (22) fixation is relatively complicated and the fixation effect is not good.

[0004] In the above-disclosed structure, the tailstock is set in a U-shaped structure. During hammering installation, the center position and the straight position of the needle bar are misaligned, which can easily cause skewness, resulting in poor precision and stability. It is also not conducive to marking the positioning position. Moreover, the lack of a segmented structure is not conducive to reducing installation resistance and has poor adaptability. It needs to be improved. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a metal intramedullary fixation needle. By setting a positioning hole and a striking cap on the needle shaft, it can be installed by striking and can be positioned by connecting rivets from the side. At the same time, by setting stage rods and transition sections of different diameters in stages, it ensures the smoothness of insertion and installation, effectively reduces installation resistance, facilitates positioning and use, and is precise and efficient.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A metal intramedullary fixation needle includes a needle shaft, one end of which is fixedly connected to a striking cap. Positioning holes are provided at both ends of the needle shaft. The other end of the needle shaft has a first transition section. A first stage rod is fixedly connected to one end of the first transition section. A second transition section is fixedly connected to one end of the first stage rod. A second stage rod is fixedly connected to one end of the second transition section. A third transition section is fixedly connected to one end of the second stage rod. A third stage rod is fixedly connected to one end of the third transition section. A conical head is fixedly connected to the end of the third stage rod. The surface of the conical head has four dividing grooves, which are evenly distributed at equal angles on the side of the conical head.

[0008] Furthermore, one side of the striking cap is provided with a positioning plane, and the other side of the striking cap is provided with a striking plane.

[0009] Furthermore, the outer surface of the striking cap is spherical, and the positioning plane is fixedly connected to the end of the needle bar.

[0010] Furthermore, the surface of the spherical surface is provided with a semi-circular groove. The angle of the semi-circular groove toward the positioning hole is such that the positioning plane and the striking plane are set by the tapping cap, which can be combined and connected for positioning. In addition, the semi-circular groove on the surface of the spherical surface can mark the position of the positioning hole, which is conducive to accurate positioning from the side, convenient and efficient, and beneficial for positioning use.

[0011] Furthermore, the needle bar, the first stage bar, the second stage bar, and the third stage bar are all circular bars, with their diameters decreasing by 0.5 mm in sequence.

[0012] Furthermore, the lengths of the needle bar, the first stage bar, the second stage bar, and the third stage bar are all equal and are 20 millimeters.

[0013] Furthermore, the first, second, and third transition sections are all conical structures. By successively reducing the diameter of the needle bar and the stage bar, and setting a conical transition structure, a smooth surface transition can be ensured. At the same time, they can be plugged in for fixed support, which is convenient, stable, and highly adaptable.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution uses a positioning hole and a striking cap on the needle bar to allow for hammering installation and can be positioned by connecting rivets from the side. At the same time, by setting stage bars and transition sections of different diameters in stages, the smoothness of insertion and installation is ensured, effectively reducing installation resistance, facilitating positioning and use, and making it precise and efficient.

[0016] (2) By setting the positioning plane and the striking plane with the tapping cap, the positioning can be combined and connected. In addition, the semi-circular groove is set on the spherical surface to mark the position of the positioning hole, which is conducive to accurate positioning from the side, convenient and efficient, and conducive to positioning use.

[0017] (3) By successively reducing the diameter of the needle bar and the stage bar, and setting a transition structure with a conical structure, a smooth surface transition can be ensured. At the same time, it can be plugged in for fixed support, which is convenient, stable, and highly adaptable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the striking cap of this utility model;

[0021] Figure 4 This is a schematic diagram of the conical head of this utility model.

[0022] Explanation of the labels in the diagram:

[0023] 1. Needle bar, 11. Striking cap, 12. Positioning hole, 13. First transition section, 14. First stage rod, 15. Second transition section, 16. Second stage rod, 17. Third transition section, 18. Third stage rod, 19. Conical head, 2. Positioning plane, 21. Striking plane, 22. Spherical surface, 23. Semicircular groove, 24. Separating groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 , Figure 2 and Figure 4A metal intramedullary fixation needle includes a needle shaft 1, one end of which is fixedly connected to a striking cap 11. Positioning holes 12 are provided at both ends of the needle shaft 1. The other end of the needle shaft 1 has a first transition section 13. One end of the first transition section 13 is fixedly connected to a first stage rod 14. One end of the first stage rod 14 is fixedly connected to a second transition section 15. One end of the second transition section 15 is fixedly connected to a second stage rod 16. One end of the second stage rod 16 is fixedly connected to a third transition section 17. One end of the third transition section 17 is fixedly connected to a third stage rod 18. The end of the third stage rod 18 is fixedly connected to... The device is equipped with a conical head 19, the surface of which is provided with four dividing grooves 24. These grooves are evenly distributed at equal angles on the side of the conical head 19. The dividing grooves 24 can divide the conical head 19 into a four-corner structure, which is convenient for insertion and installation. The first transition section 13 connects the first stage rod 14 and the lower end in one go. The diameter can be reduced from top to bottom. When the conical head 19 is inserted for installation, the contact area at the end is small, which can reduce the corresponding resistance. As it is inserted deeper, the diameter can be increased, thereby ensuring the support strength. It has high adaptability and is convenient for installation and use.

[0026] Please see Figure 1 , Figure 2 and Figure 3 The striking cap 11 has a positioning plane 2 on one side and a striking plane 21 on the other side. The outer surface of the striking cap 11 is a spherical surface 22. The positioning plane 2 is fixedly connected to the end of the needle bar 1. The surface of the spherical surface 22 has a semi-circular groove 23. The semi-circular groove 23 faces the positioning hole 12 at an angle. By setting the positioning plane and the striking plane on the striking cap, positioning can be combined and connected. The semi-circular groove on the spherical surface can mark the position of the positioning hole, which is convenient and efficient for precise positioning from the side. The striking plane 21 on the top of the striking cap 11 can be hammered into the needle bar 1 for installation, avoiding slippage and misalignment. The spherical surface 22 on the outer surface can ensure the smoothness of the surface, avoid interference with the side, and improve the stability of avoidance. The semi-circular groove 23 can mark the position of the positioning hole 12, which is convenient for riveting and fixing the crossbar from the side, avoiding misalignment and interference. On the other hand, it can form an anti-slip function to prevent slippage, which is conducive to adjusting positioning and has high adaptability.

[0027] Please see Figure 1 and Figure 2The needle bar 1, the first stage bar 14, the second stage bar 16, and the third stage bar 18 are all circular bars, with their diameters decreasing by 0.5 mm in succession. The lengths of the needle bar 1, the first stage bar 14, the second stage bar 16, and the third stage bar 18 are all equal and 20 mm. The first transition section 13, the second transition section 15, and the third transition section 17 are all conical structures. By successively reducing the diameters of the needle bar and the stage bars and setting the transition structure with a conical structure, a smooth surface transition can be ensured. At the same time, it can be plugged in for fixed support, which is convenient, stable, and highly adaptable.

[0028] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A metal intramedullary fixation needle, comprising a needle stem (1), one end of the needle stem (1) being fixedly connected with a knocking cap (11), both ends of the inside of the needle stem (1) being provided with positioning holes (12), characterized in that: The other end of the needle bar (1) is provided with a first transition section (13), one end of the first transition section (13) is fixedly connected to a first stage rod (14), one end of the first stage rod (14) is fixedly connected to a second transition section (15), one end of the second transition section (15) is fixedly connected to a second stage rod (16), one end of the second stage rod (16) is fixedly connected to a third transition section (17), one end of the third transition section (17) is fixedly connected to a third stage rod (18), and the end of the third stage rod (18) is fixedly connected to a conical head (19). The surface of the conical head (19) is provided with a dividing groove (24), there are four dividing grooves (24), and they are evenly distributed at equal angles on the side of the conical head (19).

2. The metal intramedullary fixation needle according to claim 1, characterized in that: The striking cap (11) has a positioning plane (2) on one side and a striking plane (21) on the other side surface.

3. The metal intramedullary fixation needle according to claim 2, characterized in that: The outer surface of the striking cap (11) is a spherical surface (22), and the positioning plane (2) is fixedly connected to the end of the needle bar (1).

4. The metal intramedullary fixation needle according to claim 3, characterized in that: The surface of the spherical surface (22) is provided with a semi-circular groove (23), and the semi-circular groove (23) is oriented towards the positioning hole (12) at an angle.

5. The metal intramedullary fixation needle according to claim 1, characterized in that: The needle bar (1), the first stage bar (14), the second stage bar (16) and the third stage bar (18) are all circular bars, and their diameters decrease by 0.5 mm in sequence.

6. The metal intramedullary fixation needle according to claim 1, characterized in that: The needle bar (1), the first stage bar (14), the second stage bar (16), and the third stage bar (18) are all of equal length and are 20 mm.

7. The metal intramedullary fixation needle according to claim 1, characterized in that: The first transition section (13), the second transition section (15) and the third transition section (17) are all conical structures.

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