A metal bone needle with an openable hole and a chip-breaking groove
By designing metal bone needles with openable and closable holes and chip-dispersing grooves, the problems of cumbersome procedures and easy breakage of existing Kirschner wires have been solved, thus simplifying the surgical process, reducing bone damage, and promoting postoperative recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI EAST HOSPITAL EAST HOSPITAL TONGJI UNIV SCHOOL OF MEDICINE
- Filing Date
- 2025-04-08
- Publication Date
- 2026-05-26
AI Technical Summary
Existing Kirschner wires with holes are cumbersome to use, take a long time to operate, have small holes that make it difficult to insert sutures, and lack chip-removing grooves at the needle tip, resulting in high frictional heat and stress concentration, making them prone to breakage, thus increasing the difficulty and time of the operation.
Design a metal bone needle with an openable hole and a chip-removing groove. After drilling through the bone fragment with an electric drill, clean the bone debris in the suture notch, hang the double-stranded suture into the suture notch, and use an opening and closing spring to automatically open the hole, eliminating the step of single-thread lead-out. A chip-removing groove is provided at the needle tip to reduce heat and stress concentration.
It reduces surgical steps, saves time, lowers the risk of bone damage and needle tip breakage, and facilitates postoperative recovery.
Smart Images
Figure CN224269416U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a metal bone needle with an openable hole and a chip-separating groove. Background Technology
[0002] Metal bone pins have been used for internal fixation of fractures for over 100 years. Commonly used metal bone pins in clinical practice include Kirschner wires and Steinmann wires. They have many advantages such as simple surgical operation, convenient use, effective fixation, and low price, and are widely used in clinical practice.
[0003] Currently, the perforated Kirschner wires used clinically have a through hole at or near the tip of the needle. Sutures are passed through the fracture fragments via these perforated Kirschner wires to achieve direct bone-to-bone suturing. The specific process is as follows: The perforated Kirschner wire is drilled through the fracture fragment using an electric drill. Bone debris is removed from the hole in the perforated Kirschner wire. Then, the suture is inserted through the hole, ensuring the suture and Kirschner wire are on the same axis. The Kirschner wire is then withdrawn using a slow drill and quick withdrawal, allowing the suture to pass through the hole in the fracture fragment. Because the through hole of the Kirschner wire cannot be opened, the suture must be cut at the point of contact with the through hole after passing through the bone tunnel, turning one double-stranded suture into two single-stranded sutures. Two double-stranded sutures are then introduced through the two single-stranded sutures. The two double-stranded sutures are then tied with Nice knots to reduce and fix the fracture fragments, achieving direct bone-to-bone suturing. If necessary, bone plates, screws, intramedullary nails, etc., are used to further strengthen the fixation of the fracture ends.
[0004] However, existing perforated Kirschner wires are cumbersome to use, resulting in prolonged surgical time and hindering postoperative recovery. Furthermore, the small holes in existing perforated Kirschner wires make it difficult to insert thicker sutures, while thinner sutures, due to their limited strength, are prone to breakage. Once a suture breaks, it must be removed during surgery, increasing both the surgical time and difficulty. Moreover, existing perforated Kirschner wires lack chip grooves at the tip. During drilling, the friction between the Kirschner wire and bone generates high heat, causing local bone damage. Additionally, local stress concentration at the contact surface makes the Kirschner wire tip prone to breakage. Once broken, the broken tip must be removed during surgery, further increasing the surgical time and difficulty.
[0005] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content
[0006] The purpose of this invention is to provide a metal bone needle with an openable hole and a chip-separating groove. This metal bone needle solves the technical problems of existing perforated Kirschner wires, such as the inability to open the needle hole, the small size of the needle hole, and the difficulty in inserting sutures. It reduces surgical steps, saves surgical time, and facilitates postoperative recovery.
[0007] This utility model provides a metal bone needle with an openable hole and a chip-dispersing groove, comprising a metal bone needle body and an opening / closing spring. The metal bone needle body includes a cylindrical needle body and a needle tip at the end. A threading notch or two threading notches are provided on the side of the needle body near the needle tip. An upper arc-shaped groove and a lower arc-shaped groove are respectively provided at both ends of the threading notch. A downwardly extending baffle is provided at the edge of the upper arc-shaped groove, and a connecting hole is provided on the inner side of the lower arc-shaped groove. The opening / closing spring includes an opening / closing piece, an arc-shaped piece, and a connecting piece. One end of the arc-shaped piece is connected to the opening / closing piece, and the other end of the arc-shaped piece is connected to the connecting piece. The arc-shaped piece is engaged in the lower arc-shaped groove, the connecting piece is inserted into the connecting hole, and the other end of the opening / closing piece is pressed against the inner side of the baffle of the upper arc-shaped groove. Three or four edges are evenly distributed on the side of the needle tip, and chip-dispersing grooves are provided between adjacent edges.
[0008] Using the above technical solution, during use, a perforated Kirschner wire is drilled through the fracture fragment using an electric drill. Bone debris in the suture notch is cleaned, and two or more double-stranded sutures are respectively inserted into the suture notch. The Kirschner wire is then removed using an electric drill (slow drill, fast retraction), and the double-stranded sutures are brought out. The suture hole is opened by pressing the opening and closing spring, and the sutures are taken out. The fracture fragment is then tied and fixed by tying Nice knots with the double-stranded sutures, achieving direct bone-to-bone suturing. After the fracture fragment is reduced and fixed, if necessary, the fracture ends can be further fixed using bone plates, screws, intramedullary nails, etc., which facilitates early functional exercise of the affected limb, early weight-bearing, and prevents joint stiffness, muscle atrophy, osteoporosis, etc. During use, simply press the double-stranded sutures onto the opening and closing spring, pull the double-stranded sutures, and the double-stranded sutures will slide into the suture notch. The opening and closing spring will automatically spring back to its original position, closing the suture hole.
[0009] Furthermore, both the metal bone needle body and the opening and closing spring are integrally formed structures.
[0010] Furthermore, the metal bone needle body has an outwardly protruding bulge at the needle body portion adjacent to the needle tip.
[0011] Furthermore, the length of the threading notch is 1.5-2.5mm, the width is 0.3-0.5mm, and the depth is 0.3-0.5mm.
[0012] Furthermore, the opening and closing spring has a length of 1.2-2.2 mm, a width of 0.3-0.5 mm, a height of 0.4-0.7 mm, and a thickness of 0.1-0.2 mm.
[0013] Furthermore, the baffle has a length of 0.3-0.5 mm, a width of 0.3-0.5 mm, and a thickness of 0.1-0.2 mm.
[0014] Furthermore, the outer diameter of the arc-shaped piece is 0.3-0.5 mm.
[0015] Furthermore, the length of the cylindrical needle body is 3-20cm, and the diameter of the cylindrical needle body is 1-6mm.
[0016] Furthermore, the height of the needle tip is 2-6 mm, and the diameter of the needle tip is 1-6 mm.
[0017] Furthermore, the metal bone needle body is made of medical-grade stainless steel or medical-grade titanium alloy.
[0018] Furthermore, the opening and closing spring is made of medical-grade stainless steel, medical-grade titanium alloy, or medical-grade polymer material.
[0019] This invention relates to a metal bone needle with an openable hole and a chip-removing groove. In use, the perforated metal bone needle is drilled through the fracture fragment using an electric drill. Bone debris is cleared from the suture notch, and two or more double-stranded sutures are inserted into the notch. The Kirschner wire is then removed using a slow drill (slow drill, fast retraction), and the two or more double-stranded sutures are brought out. The fracture fragment is then tied and fixed by Nice knots tied with the two or more double-stranded sutures, achieving direct bone-to-bone suture. During use, the double-stranded sutures are simply pressed onto the opening and closing plate of the opening and closing spring, and pulling the double-stranded sutures causes them to slide in. The suture notch in this invention solves the problem of existing perforated Kirschner wires where the suture hole cannot be opened, eliminating the need to guide two single sutures to two double-stranded sutures, thus reducing surgical steps and saving surgical time. Furthermore, it addresses the technical problem of existing perforated Kirschner wires having small suture holes, making suture insertion difficult. Additionally, it overcomes the technical problem of existing Kirschner wires lacking chip-dispersing grooves at the tip, resulting in high heat generation and stress concentration at the bone-bone contact surface during drilling, leading to significant bone damage and easy breakage of the Kirschner wire tip. Therefore, this Kirschner wire reduces surgical steps, saves surgical time, reduces bone damage, lowers the risk of tip breakage, and facilitates postoperative recovery. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of the metal bone needle provided in Embodiment 1 of this utility model.
[0021] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the metal bone needle body.
[0022] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the opening and closing spring of the metal bone needle.
[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the metal bone needle provided in Embodiment 2 of this utility model.
[0024] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the metal bone needle body.
[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the metal bone needle provided in Embodiment 3 of this utility model.
[0026] Figure 7 This is a schematic diagram of another cross-sectional structure of the metal bone needle provided in Embodiment 3 of this utility model.
[0027] Figure 8 for Figure 1 A schematic diagram of the structure of the tip of the metal bone needle.
[0028] The reference numerals and components involved in the accompanying drawings are shown below:
[0029] 1. Metal bone needle body
[0030] 111. Cylindrical needle body
[0031] 112. Needle tip
[0032] 11. Threading gap
[0033] 12. Upper arc-shaped groove
[0034] 13. Lower end arc-shaped groove
[0035] 14. Baffle
[0036] 15. Connecting hole
[0037] 16. Edge
[0038] 17. Chip separating groove
[0039] 18. Bulging end
[0040] 2. Opening and closing spring clips
[0041] 21. Opening and closing piece
[0042] 22. Curved piece
[0043] 23. Connecting piece Detailed Implementation
[0044] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0045] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0046] Example 1
[0047] Figure 1 This is a schematic diagram of the cross-sectional structure of the metal bone needle provided in Embodiment 1 of this utility model. Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the metal bone needle body. Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the opening and closing spring of the metal bone needle. Figure 8 for Figure 1 A schematic diagram of the structure of the metal bone needle body and its tip. Please refer to... Figure 1 , Figure 2 , Figure 3 , Figure 8 This utility model provides a metal bone needle with an openable hole and a chip-breaking groove, comprising a metal bone needle body 1 and an opening / closing spring 2; the metal bone needle body 1 includes a cylindrical needle body 111 and a needle tip 112 located at the end; a threading notch 11 is provided on the side of the needle body 1 near the needle tip 112, and an upper arc-shaped groove 12 and a lower arc-shaped groove 13 are respectively provided at both ends of the threading notch 11; a downwardly extending baffle 14 is provided at the edge of the upper arc-shaped groove 12, and a connecting plate is provided on the inner side of the lower arc-shaped groove 13. Hole 15; The opening and closing spring 2 includes an opening and closing piece 21, an arc-shaped piece 22, and a connecting piece 23; One end of the arc-shaped piece 22 is connected to the opening and closing piece 21, and the other end of the arc-shaped piece 22 is connected to the connecting piece 23; The arc-shaped piece 22 is engaged in the lower arc-shaped groove 13, the connecting piece 23 is inserted into the connecting hole 15, and the other end of the opening and closing piece 21 is pressed against the inner side of the baffle 14 of the upper arc-shaped groove 12; Three or four edges 16 are evenly distributed on the side of the needle tip 112, and chip-separating grooves 17 are provided between adjacent edges.
[0048] It should be noted that the metal bone needle of this utility model with an openable hole and a chip-separating groove is used to drill through the fracture fragment with an electric drill, clean the bone fragments in the threading notch 11, hang two or more double-stranded threads into the threading notch 11 respectively, slowly drill and quickly withdraw the metal bone needle with an electric drill, lead out the double-stranded threads, tie Nice knots with the double-stranded threads to tie and fix the fracture fragment, and realize direct bone-to-bone suturing.
[0049] The metal bone needle of this invention has an openable hole and a chip-separating groove. During use, simply press the double-stranded wire onto the opening and closing plate 21 of the opening and closing spring 2, pull the double-stranded wire, and the double-stranded wire will slide into the threading notch 11.
[0050] This invention, using a metal bone needle, solves the problem of existing perforated Kirschner wires where the needle hole cannot be opened, eliminating the need to guide two single sutures to two double-stranded sutures, thus reducing surgical steps. It also addresses the technical problem of existing Kirschner wires having small needle holes, making suture insertion difficult. Furthermore, it solves the technical problem of existing Kirschner wires lacking chip-dispersing grooves at the needle tip, resulting in high heat generation and stress concentration at the Kirschner wire-bone contact surface during drilling, leading to significant bone damage and easy breakage of the Kirschner wire tip. This invention reduces surgical steps, saves surgical time, reduces bone damage, lowers the risk of needle tip breakage, and facilitates postoperative recovery.
[0051] Furthermore, the design of the edge 16 ensures both the strength of the tip 112 of the metal bone needle body 1, making it less prone to breakage, and the drilling efficiency of the metal bone needle body 1. The edge 16 of the tip 112 is provided with a chip-breaking groove 17, which can reduce the heat generation and stress concentration during the drilling process of the metal bone needle body 1 and the bone, reduce bone damage, and prevent the tip from breaking.
[0052] It should be noted that the metal bone needle body 1 and the opening / closing spring 2 of this utility model are integrally molded structures. The metal bone needle body 1 is made of medical-grade stainless steel or medical-grade titanium alloy; the opening / closing spring 2 is made of medical-grade stainless steel, medical-grade titanium alloy, or medical-grade polymer material; the threading notch 11 has a length of 1.5-2.5 mm, a width of 0.3-0.5 mm, and a depth of 0.3-0.5 mm; the opening / closing spring 2 has a length of 1.2-2.2 mm, a width of 0.3-0.5 mm, a height of 0.4-0.7 mm, and a thickness of 0.1-0.2 mm. The baffle 14 has a length of 0.3-0.5 mm, a width of 0.3-0.5 mm, and a thickness of 0.1-0.2 mm. The outer diameter of the arc-shaped piece 22 is 0.3-0.5 mm. The cylindrical needle body 111 has a length of 3-20 cm and a diameter of 1-6 mm. The height of the needle tip 112 is 2-6mm, and the diameter is 1-6mm.
[0053] Example 2
[0054] The metal bone needle with openable holes and chip-separating grooves in this embodiment is basically the same as the metal bone needle with openable holes and chip-separating grooves provided in Embodiment 1, except for the number of threading notches 11.
[0055] Figure 4 This is a schematic diagram of the cross-sectional structure of the metal bone needle provided in Embodiment 2 of this utility model. Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the metal needle body in a medium-sized metal needle. Please refer to... Figure 4 , Figure 5 In this embodiment, two threading notches 11 are provided on the side of the metal bone needle body 1 near the needle tip.
[0056] It should be noted that the design of the two suture notches 11 requires the use of more double-stranded sutures to fix the fracture ends during the operation, thus allowing more double-stranded sutures to be inserted.
[0057] Example 3
[0058] The metal bone needle with an openable hole and a chip-breaking groove in this embodiment is basically the same as the metal bone needle with an openable hole and a chip-breaking groove provided in Embodiment 1, except that the bulging end 18 is different.
[0059] Figure 6 This is a schematic diagram of the cross-sectional structure of the metal bone needle provided in Embodiment 3 of this utility model. Figure 7 This is a schematic diagram of another cross-sectional structure of the metal bone needle provided in Embodiment 3 of this utility model. Please refer to... Figure 6 , Figure 7 In this embodiment, the metal bone needle body 1 is provided with an outwardly protruding bulge end 18 at the needle body portion adjacent to the needle tip 112.
[0060] It should be noted that for very fine metal needles, such as those with a diameter of 1.0 mm, the needle body portion adjacent to the needle tip 112 is appropriately protruded and thickened to provide space for the opening and closing hole, thus preventing the metal needle from breaking during drilling.
[0061] As can be seen from the above description, the advantages of this utility model are:
[0062] 1. This utility model features a metal bone needle with an openable hole and a chip-removing groove. In use, the perforated metal bone needle is drilled through the fracture fragment using an electric drill. Bone debris is cleared from the suture notch, and multiple double-stranded sutures are inserted into the notch. The Kirschner wire is then withdrawn using a slow drill and a quick retraction, allowing the multiple double-stranded sutures to be led out. After the sutures pass through the bone tunnel, the openable hole is opened to allow the sutures to be removed. The fracture fragment is then tied and fixed using Nice knots tied with the double-stranded sutures, achieving direct bone-to-bone suturing. During use, the double-stranded sutures are simply pressed against the open hole. On the opening and closing tab of the snap-fit device, pulling the double-stranded thread causes it to slide into the threading notch. This new type of metal bone needle solves the problem of existing perforated Kirschner wires where the hole cannot be opened, eliminating the need to draw two single-stranded threads from two single-stranded threads, thus reducing surgical steps. It also solves the technical problem of existing perforated Kirschner wires having small holes, making suture insertion difficult. Furthermore, it addresses the technical problem of existing Kirschner wires lacking chip-dispersing grooves at the needle tip, resulting in high heat generation and stress concentration at the Kirschner wire-bone contact surface during drilling, leading to significant bone damage and easy breakage of the Kirschner wire tip. This new Kirschner wire reduces surgical steps, saves surgical time, reduces bone damage, lowers the risk of needle tip breakage, and facilitates postoperative recovery.
[0063] 2. The metal bone needle of this invention, featuring an openable hole and chip-breaking grooves, has three or four evenly distributed edges on the side of the needle tip, with chip-breaking grooves between adjacent edges. The edge design ensures both the strength of the needle tip portion of the metal bone needle body, preventing breakage, and the drilling efficiency of the metal bone needle body. The chip-breaking grooves between the edges of the needle tip reduce heat generation and stress concentration during the drilling process between the metal bone needle body and bone, minimizing bone damage and preventing needle tip breakage.
[0064] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A metal bone needle having an openable hole and a chip-dispersing groove, characterized in that, It includes a metal bone needle body (1) and an opening and closing spring (2); The metal bone needle body (1) includes a cylindrical needle body (111) and a needle tip (112) at the end; a threading notch (11) or two threading notches (11) is provided on the side of the needle body near the needle tip (112) of the metal bone needle body (1); an upper arc groove (12) and a lower arc groove (13) are provided at both ends of the threading notch (11); a downwardly extending baffle (14) is provided at the edge of the upper arc groove (12); and a connecting hole (15) is provided on the inner side of the lower arc groove (13). The opening and closing spring (2) includes an opening and closing piece (21), an arc-shaped piece (22), and a connecting piece (23). One end of the arc-shaped piece (22) is connected to the opening and closing piece (21), and the other end of the arc-shaped piece (22) is connected to the connecting piece (23). The arc-shaped piece (22) is engaged in the lower arc-shaped groove (13), the connecting piece (23) is inserted into the connecting hole (15), and the other end of the opening and closing piece (21) is pressed against the inner side of the baffle (14) of the upper arc-shaped groove (12). Three or four edges (16) are evenly distributed on the side of the needle tip (112), and chip-separating grooves (17) are provided between adjacent edges.
2. The metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The metal bone needle body (1) and the opening and closing spring (2) are both integrally formed structures.
3. The metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The metal bone needle body (1) is provided with an outwardly protruding bulge end (18) at the needle body portion adjacent to the needle tip (112).
4. A metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The threading notch (11) has a length of 1.5-2.5 mm, a width of 0.3-0.5 mm, and a depth of 0.3-0.5 mm.
5. A metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The opening and closing spring (2) has a length of 1.2-2.2 mm, a width of 0.3-0.5 mm, a height of 0.4-0.7 mm, and a thickness of 0.1-0.2 mm.
6. A metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The baffle (14) has a length of 0.3-0.5 mm, a width of 0.3-0.5 mm, and a thickness of 0.1-0.2 mm.
7. A metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The outer diameter of the arc-shaped piece (22) is 0.3-0.5 mm.
8. A metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The length of the cylindrical needle body (111) is 3-20cm, and the diameter of the cylindrical needle body (111) is 1-6mm.
9. A metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The height of the needle tip (112) is 2-6 mm, and the diameter of the needle tip (112) is 1-6 mm.
10. A metal bone needle with an openable hole and a chip-breaking groove according to claim 1, characterized in that, The metal bone needle body (1) is made of medical stainless steel or medical titanium alloy; the opening and closing spring (2) is made of medical stainless steel, medical titanium alloy or medical polymer material.