Threaded kirschner wire with rotatable tip
By designing a tip rotatable threaded K-Wuans pin in traction of pelvic fracture, the connection block articulation design solves the problem of the transverse bone noose affecting reset, realizing the maintenance of axial traction while removing the noose, improving the reset efficiency.
Patent Information
- Application Number
- CN202421043080.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In pelvic fractures, the hip bone is moved upward and retained, resulting in a transverse bone noose, affecting reduction, and the prior art transverse fixing steel needles are prone to affect axial traction.
A threaded K-Wire pin with a tip rotatable tip is designed to hinge the linking block between the tip and the tail rod, allowing free rotation between the tip and the tail rod, ensuring that the axial traction reset is not affected when lateral traction is traction.
It realizes that while removing the bone noose, maintaining axial traction force, avoiding affecting the axial traction reset, and improving the efficiency of pelvic fracture traction reset.
Smart Images
Figure CN222623045U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of traction and reduction of pelvic fractures, in particular to a threaded Kirschner wire with a rotatable tip. Background Art
[0002] In pelvic fractures, the hip bone may move upward and get stuck. At this time, traction and reduction on the leg are required, but the lateral bone blocks are noose and jammed, which affects the reduction. The current method is to use a fixed steel needle to drill in, use a fixator to traction laterally, and then release the interlocking, but this lateral fixed steel needle is easy to affect and limit the axial traction on the leg. Utility Model Content
[0003] The utility model aims to address the deficiencies of the prior art and provide a threaded Kirschner wire with a rotatable tip. A connecting block is added between the tip and the tail rod so that the tip and the tail rod are hinged through the connecting block, thereby enabling the tip and the tail rod to rotate freely. When the Kirschner wire is pulled laterally to release the bone block noose, the axial traction force can cause the tip of the Kirschner wire to rotate slightly downward, thereby not affecting the axial traction reduction.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A threaded Kirschner wire with a rotatable tip comprises a tip, a connecting block and a tail rod, wherein the tip and the tail rod are hinged via the connecting block, one end of the tip is provided with a needle head, and the other end is provided with a first U-shaped connecting port, both ends of the connecting block are respectively provided with a connecting hole, and the opening directions of the two connecting holes are perpendicular to each other, a second U-shaped connecting port is provided at the head of the tail rod, and rivet holes are provided on two ears of the first U-shaped connecting port and the second U-shaped connecting port corresponding to the connecting holes, and both ends of the connecting block are respectively extended into the first U-shaped connecting port and the second U-shaped connecting port, and after the connecting holes at both ends of the connecting block are respectively aligned with the rivet holes on the first U-shaped connecting port and the second U-shaped connecting port, the connection between the connecting block and the tip and the tail rod is completed by driving in rivets.
[0006] Specifically, the needle consists of two parts, which are divided into a puncture part and a fixing part from the tip to the back. The puncture part is in the shape of a threaded drill bit, and the rear end of the puncture part is closely connected to the fixing part. The outer surface of the fixing part is provided with a plurality of miniature trapezoidal serrations.
[0007] Specifically, the total length of the needle is 40 mm, of which the puncture part is 25 mm long and the fixing part is 15 mm long. The inclination angle of the front part of each micro trapezoidal sawtooth on the fixing part is 35°, the inclination angle of the rear part is 3°, and the tooth spacing between two adjacent micro trapezoidal sawtooth is 1.25 mm.
[0008] Specifically, the structures of the first U-shaped connection port and the second U-shaped connection port are the same, the opening widths of the first U-shaped connection port and the second U-shaped connection port are both 6 mm, the opening depth of the first U-shaped connection port is 8.5 mm, the opening depth of the second U-shaped connection port is 9 mm, the length of the connection block is 8 mm, the width is 5.5 mm, and both ends of the connection block are chamfered.
[0009] Specifically, the diameters of the connecting holes and the riveting holes are both 2 mm.
[0010] Specifically, the tip and tail rod are both round rods, the rod diameters of the tip and tail rod body are 6 mm, and the maximum rod diameter at the hinge between the tip and tail rod is 10 mm.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. The utility model adds a connecting block between the tip and the tail rod, so that the tip and the tail rod are hinged through the connecting block, thereby enabling the tip and the tail rod to rotate freely, so that when the Kirschner wire is pulled laterally to release the bone block noose, the axial traction force can cause the tip of the Kirschner wire to rotate slightly downward, thereby not affecting the axial traction reduction.
[0013] 2. The tip of the utility model is designed with a puncture part and a fixing part. The threaded drill bit design of the puncture part can facilitate the insertion of the Kirschner wire, and the trapezoidal serrations on the outer surface of the fixing part can facilitate the fixation of the Kirschner wire after it is drilled into the specified position, so that it is not easy to fall out. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the overall structure of the universal threaded Kirschner wire of the utility model;
[0015] Figure 2 This is a structural schematic diagram of the connection block of the utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the tail rod of the utility model;
[0017] Figure 4 It is a schematic diagram of the structure of the cutting edge of the utility model.
[0018] In the figure: 1. tip; 2. connecting block; 3. tail rod; 4. needle; 5. first U-shaped connecting port; 6. connecting hole; 7. second U-shaped connecting port; 8. riveting hole; 9. rivet; 10. puncture part; 11. fixing part; 12. micro trapezoidal serrations. DETAILED DESCRIPTION
[0019] In order to better reflect the advantages and innovations of the present invention and clearly demonstrate the technical solution of the present invention, the implementation methods of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0020] Example 1
[0021] like Figure 1 As shown, the utility model provides a threaded Kirschner wire with a rotatable tip, comprising a tip 1, a connecting block 2 and a tail rod 3, wherein the tip 1 and the tail rod 3 are hingedly connected through the connecting block 2, and a needle 4 is provided at one end of the tip 1 and a first U-shaped connecting port 5 is provided at the other end. Figure 2 As shown, the two ends of the connection block 2 are each provided with a connection hole 6, and the opening directions of the two connection holes 6 are perpendicular to each other. Figure 3 As shown, the head of the tail rod 3 is provided with a second U-shaped connecting port 7, and the two ears of the first U-shaped connecting port 5 and the second U-shaped connecting port 7 are provided with rivet holes 8 corresponding to the connecting holes 6, and the two ends of the connecting block 2 are respectively extended into the first U-shaped connecting port 5 and the second U-shaped connecting port 7. After the connecting holes 6 at the two ends of the connecting block 2 are respectively aligned with the rivet holes 8 on the first U-shaped connecting port 5 and the second U-shaped connecting port 7, the connection between the connecting block 2 and the tip 1 and the tail rod 3 is completed by driving in rivets 9.
[0022] like Figure 4 As shown, the needle 4 consists of two parts, which are divided into a puncture part 10 and a fixing part 11 from the tip 1 from front to back. The puncture part 10 is in the shape of a threaded drill bit, and the rear end of the puncture part 10 is closely connected to the fixing part 11. The outer surface of the fixing part is provided with a plurality of miniature trapezoidal serrations 12.
[0023] In this embodiment, the design of the threaded drill bit of the puncture part 10 can facilitate the drilling of the Kirschner wire, and the micro trapezoidal serrations 12 on the outer surface of the fixing part 11 can facilitate the fixation of the Kirschner wire after drilling into the specified position, so that it is not easy to fall out.
[0024] In this embodiment, preferably, the total length of the needle 4 is 40 mm, of which the puncture portion 10 is 25 mm long, the fixing portion 11 is 15 mm long, the front inclination angle of each micro trapezoidal sawtooth 12 on the fixing portion 11 is 35°, the rear inclination angle is 3°, and the tooth spacing between two adjacent micro trapezoidal sawtooth 12 is 1.25 mm.
[0025] The structures of the first U-shaped connecting port 5 and the second U-shaped connecting port 7 are the same. The opening widths of the first U-shaped connecting port 5 and the second U-shaped connecting port 7 are both 6 mm. The opening depth of the first U-shaped connecting port 5 is 8.5 mm. The opening depth of the second U-shaped connecting port 7 is 9 mm. The length of the connecting block 2 is 8 mm and the width is 5.5 mm. Both ends of the connecting block 2 are chamfered.
[0026] The diameters of the connecting holes 6 and the riveting holes 8 are both 2 mm.
[0027] In this embodiment, the tip 1 and the tail rod 3 are both round rods, the rod diameters of the tip 1 and the main body of the tail rod 3 are 6 mm, and the maximum rod diameter at the hinge between the tip 1 and the tail rod 3 is 10 mm.
[0028] How it works
[0029] When in use, the tip 1 of the Kirschner wire is drilled into the part requiring traction, and the fixator is used for lateral traction. The bone block noose is released by lateral traction. When axial traction is performed, since the tip 1 and the tail rod 3 are hinged by the connecting block 2, the tip 1 of the Kirschner wire for lateral traction can be rotated slightly downward, thereby avoiding affecting the axial traction reduction of the Kirschner wire.
[0030] It should be understood that the above description of the preferred embodiment is relatively detailed and cannot be regarded as limiting the scope of patent protection of the utility model. Under the enlightenment of the utility model, ordinary technicians in this field can also make substitutions or modifications without departing from the scope of protection of the claims of the utility model, which all fall within the scope of protection of the utility model. The scope of protection requested for the utility model shall be based on the attached claims.
Claims
1. A threaded Kirschner wire with a rotatable tip, characterized in that: The invention comprises a tip (1), a connection block (2) and a tail rod (3), wherein the tip (1) and the tail rod (3) are hingedly connected via the connection block (2), one end of the tip (1) is provided with a needle head (4), and the other end is provided with a first U-shaped connection port (5), two ends of the connection block (2) are respectively provided with a connection hole (6), and the opening directions of the two connection holes (6) are perpendicular to each other, a second U-shaped connection port (7) is provided at the head of the tail rod (3), two ears of the first U-shaped connection port (5) and the second U-shaped connection port (7) are provided with rivet holes (8) corresponding to the connection holes (6), the two ends of the connection block (2) are respectively extended into the first U-shaped connection port (5) and the second U-shaped connection port (7), and after the connection holes (6) at the two ends of the connection block (2) are respectively aligned with the rivet holes (8) on the first U-shaped connection port (5) and the second U-shaped connection port (7), the connection between the connection block (2) and the tip (1) and the tail rod (3) is completed by driving in rivets (9).
2. A threaded Kirschner wire with a rotatable tip according to claim 1, characterized in that: The needle (4) is composed of two parts, which are divided into a puncture part (10) and a fixing part (11) from the tip (1) in sequence from front to back. The puncture part (10) is in the shape of a threaded drill. The rear end of the puncture part (10) is closely connected to the fixing part (11). The outer surface of the fixing part is provided with a plurality of miniature trapezoidal saw teeth (12).
3. A threaded Kirschner wire with a rotatable tip according to claim 2, characterized in that: The total length of the needle (4) is 40 mm, of which the length of the puncture portion (10) is 25 mm, and the length of the fixing portion (11) is 15 mm. The inclination angle of the front portion of each micro-trapezoidal sawtooth (12) on the fixing portion (11) is 35°, the inclination angle of the rear portion is 3°, and the tooth spacing between two adjacent micro-trapezoidal sawtooths (12) is 1.25 mm.
4. A threaded Kirschner wire with a rotatable tip according to claim 1, characterized in that: The first U-shaped connection port (5) and the second U-shaped connection port (7) have the same structure; the opening widths of the first U-shaped connection port (5) and the second U-shaped connection port (7) are both 6 mm; the opening depth of the first U-shaped connection port (5) is 8.5 mm; the opening depth of the second U-shaped connection port (7) is 9 mm; the length of the connection block (2) is 8 mm and the width is 5.5 mm; both ends of the connection block (2) are chamfered.
5. A threaded Kirschner wire with a rotatable tip according to claim 1, characterized in that: The diameters of the connection holes (6) and the riveting holes (8) are both 2 mm.
6. A threaded Kirschner wire with a rotatable tip according to claim 1, characterized in that: The tip (1) and the tail rod (3) are both round rods, the rod diameters of the tip (1) and the tail rod (3) are 6 mm, and the maximum rod diameter at the hinge between the tip (1) and the tail rod (3) is 10 mm.