Kirschner wire guiding tool
By designing a KWN guide tool including a guide tube and a needle core, the problem of difficulty in positioning and guiding KWN during surgery is solved, achieving higher accuracy and stability, and reducing damage to important tissues.
Patent Information
- Application Number
- CN202421021506.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The existing Kleiner needles are difficult to accurately locate and guide during surgery, especially when used as guide needles for hollow screws, which are prone to bend due to insufficient softness, affecting the surgical effect.
A Kleiner needle guide tool is designed, including a guide tube and a needle core. The first end of the guide tube is equipped with two spaced conical parts. The needle core can be plugged into the guide tube. The stable connection between the needle core and the guide tube is achieved through the clamping ring and connecting rod structure, ensuring the stability and accuracy of the guide tube during the puncture process.
This tool can effectively protect the Klein needle, improve its positioning and guidance accuracy during surgery, reduce damage to important tissues, and improve the stability and operational convenience of the guide tube through the design of the tapered part.
Smart Images
Figure CN222565927U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of orthopedic medical instruments, in particular to a Kirschner wire guiding tool. Background Art
[0002] Kirschner wires are commonly used tools or internal fixation materials in orthopedic surgery. They are often used for temporary fixation or internal fixation of fracture reduction, and guide wires for hollow screws. Before the internal fixation of the hollow screws for fractures, they are drilled through X-ray C-arm fluoroscopy. The most commonly used in clinical practice are diameters of 0.88mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, and 4.0mm. Except for Kirschner wires with larger diameters such as 3.0mm, 3.5mm, and 4.0mm, which have better rigidity, the remaining Kirschner wires with smaller diameters are relatively soft and are easy to bend when subjected to greater force or when touching hard objects. Therefore, during the operation, its positioning and orientation functions are poor, especially when used as a guide wire for a hollow screw, it is difficult to drill it to a specific position and direction. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a Kirschner wire guiding tool which can assist the Kirschner wire in drilling and play the role of protecting, positioning and guiding the Kirschner wire.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a Kirschner wire guide tool, including a guide tube, the guide tube including a first end portion, the first end portion is provided with two spaced-apart conical portions; also including a needle core detachably connected to the guide tube; the needle core includes a needle core body inserted in the guide tube, the needle core body includes a second end portion, and after the needle core body is inserted into the guide tube, the second end portion is located between the two conical portions.
[0005] As a further improvement of the above solution:
[0006] The needle core also includes a hand-held portion, which is arranged on the other end of the needle core body relative to the second end, and is provided with a clamping ring that can be sleeved and clamped on the outside of the guide tube.
[0007] The clamping ring is in the shape of an elongated strip and comprises a clamping rod which can contact the outer wall of the guide tube when the needle core body is inserted into the guide tube. The clamping rods are distributed at intervals on both sides of the needle core body.
[0008] The handheld part is provided with a connecting rod connecting the clamp ring and the needle core body, and the other end of the guide tube relative to the first end is provided with an engaging opening that can form an engaging connection with the connecting rod to limit the circumferential rotation of the needle core body in the guide tube.
[0009] The transverse width of the fitting opening is the same as the width of the connecting rod.
[0010] The diameter of the needle core body is the same as the inner hole diameter of the guide tube; after the needle core is inserted into the guide hole, the first end and the second end are combined to form a wedge shape with two inclined surfaces.
[0011] The spacing distance between the ends of the two tapered portions is the same as the inner diameter of the guide tube, and the inner diameter of the guide tube is the same as the outer diameter of the Kirschner wire.
[0012] Compared with the prior art, the advantages of the utility model are:
[0013] The utility model proposes a Kirschner wire guide tool. Before use, the needle core is inserted into the guide tube to block the guide hole, thereby reducing the damage to important tissues such as muscles, tendons, blood vessels and nerves during the puncture process. The guide tube with the needle core is punctured to the insertion point of the Kirschner wire, and the inclination direction of the guide tube is adjusted according to the insertion direction. After the adjustment of the guide tube is completed, the needle core is pulled out, and the Kirschner wire is driven into the guide hole with the help of other tools such as an electric drill. The guide tube can better guide and protect the Kirschner wire. Two conical parts are provided on the first end of the guide tube. The setting of the conical part is also convenient for better fixing the guide tube at the insertion point, improving the stability of the guide tube when the Kirschner wire is driven in. When there is a deviation in the insertion point, the guide tube can be rotated and moved at a fixed point by using a conical part as a force point to fine-tune the position of the needle port. The moving distance of one rotation is the spacing distance between the two conical parts, thereby improving the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic front view of the structure of the guide tube in the first embodiment.
[0015] Figure 2 It is a schematic three-dimensional diagram of the structure of the guide tube in the first embodiment.
[0016] Figure 3 It is a schematic front view of the structure of the needle core in the first embodiment.
[0017] Figure 4 It is a schematic three-dimensional diagram of the structure of the needle core in the first embodiment.
[0018] Figure 5 It is a schematic front view of the structure of the Kirschner wire guide tool in Example 1.
[0019] Figure 6 It is a schematic structural stereogram of the Kirschner wire guide tool of the needle core in the first embodiment.
[0020] Figure 7 It is a schematic structural stereogram of the Kirschner wire guide tool in the second embodiment.
[0021] Figure 8 It is a schematic structural stereogram of the Kirschner wire guide tool in the second embodiment.
[0022] Fig. 9 It is a schematic three-dimensional diagram of the structure of the needle core in the second embodiment.
[0023] The symbols in the figure represent:
[0024] 1. Guide tube; 11. Conical portion; 12. Fitting opening; 13. First end portion; 2. Needle core body; 21. Second end portion; 3. Hand-held portion; 31. Clamping ring; 311. Clamping rod; 32. Connecting rod; 4. Inclined surface. DETAILED DESCRIPTION
[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] Embodiment 1:
[0027] Figures 1 to 6 The utility model shows an embodiment of a Kirschner wire guide tool, comprising a guide tube 1, the guide tube 1 comprising a first end 13, the first end 13 being provided with two spaced tapered portions 11; and a needle core detachably connected to the guide tube 1; the needle core comprising a needle core body 2 inserted into the guide tube 1, the needle core body 2 comprising a second end 21, and the second end 21 being located between the two tapered portions 11 after the needle core body 2 is inserted into the guide tube 1. In the structure, before use, the needle core is inserted into the guide tube 1 to block the guide hole, thereby reducing damage to important tissues such as muscle tendons, blood vessels and nerves during the puncture process. The guide tube 1 with the needle core is punctured to the insertion point of the Kirschner wire, and the inclination direction of the guide tube 1 is adjusted according to the insertion direction. After the adjustment of the guide tube 1 is completed, the needle core is pulled out, and the Kirschner wire is driven into the guide hole with the help of other tools such as an electric drill. After the needle core is pulled out, if the needle insertion point of the guide tube 1 needs to be fine-tuned within a certain range, the guide tube 1 can be rotated with one conical portion 11 as the force point, so that the other conical portion 11 is rotated to the position of the target needle insertion point, and then the other conical portion 11 is moved with this conical portion 11 as the force point, and this is repeated several times until the guide tube 1 is moved to the target needle insertion point. The interval between the two conical portions 11 is fixed, and the distance that the guide tube 1 moves in one rotation is the distance between the two conical portions 11, thereby achieving a more accurate adjustment of the needle insertion point. The provision of the conical portion 11 also facilitates better fixing of the guide tube 1 at the needle insertion point, thereby improving the stability of the guide tube 1 when the Kirschner wire is inserted.
[0028] In this embodiment, the needle core also includes a handheld portion 3 for hand-holding, and the handheld portion 3 is arranged on the other end of the needle core body 2 relative to the second end portion 21. The handheld portion 3 is provided with a clamping ring 31 that can be sleeved and clamped on the outside of the guide tube 1. In this structure, the guide tube 1 and the needle core are tightly connected by the clamping ring 31. After the needle core is inserted into the guide tube 1, a certain clamping force is applied to the guide tube 1 by the clamping ring 31 to improve the connection stability between the needle core and the guide tube 1 during the puncture process. Increasing the connection stability between the guide tube 1 and the needle core facilitates reducing damage to important tissues such as muscles, tendons, blood vessels and nerves during the puncture process. In addition, the clamping structure is simple, which makes it easy to pull out the needle core by applying force to the handheld portion 3 after the guide tube 1 is punctured into place.
[0029] In this embodiment, the clamping ring 31 is in the shape of an elongated strip and includes two clamping rods 311. The needle core body 2 is located between the two clamping rods 311. When the needle core body 2 is inserted into the guide tube 1, the two clamping rods 311 are in contact with the outer wall of the guide tube 1. In this structure, the clamping ring is made of a material with a certain elastic deformation ability, and the gap between the two clamping rods 311 is slightly smaller than the outer diameter of the guide tube 1, which is convenient for clamping the guide tube 1 through elastic action. The clamping ring 31 is set in the shape of an elongated strip and is located on the outer wall of the needle core body 2, so that the clamping ring can be used to apply a thrust in the length direction of the needle core body 2, thereby increasing the hand-grip holding force during puncture, making puncture more stable and easy, and improving the convenience of operation.
[0030] In this embodiment, the hand-held portion 3 is provided with a connecting rod 32 whose two ends respectively connect the clamp ring 31 and the needle core body 2, and the guide tube 1 is provided with a fitting opening 12 on the other end relative to the first end 13, which can be fitted with the connecting rod 32 to limit the circumferential rotation of the needle core body 2 in the guide tube 1. Specifically, the transverse width of the fitting opening 12 is the same as the width of the connecting rod 32. In this structure, the fitting opening 12 and the connecting rod 32 are provided to form a fitting connection, thereby improving the connection stability between the needle core and the guide tube 1, preventing the needle core from rotating relative to the guide tube 1, and further reducing the safety during the puncture process.
[0031] In this embodiment, after the needle core is inserted into the guide hole, the first end portion 13 and the second end portion 21 are combined to form a wedge shape with two inclined surfaces 4. The confluence of the two inclined surfaces 4 is an arc. In this structure, the first section and the second end portion 21 are combined to form a wedge shape, and the confluence of the two inclined surfaces 4 is an arc, which facilitates puncture and reduces the probability of damage to important tissues such as muscles, tendons, blood vessels and nerves. It is also convenient to form two tapered portions 11 on the first end portion 13 after the needle core is withdrawn to fine-tune the needle entry port.
[0032] In this embodiment, the spacing distance between the two tapered portions 11 is the same as the inner diameter of the guide tube 1, and the inner diameter of the guide tube 1 is one of 0.88mm, 1mm, 1.5mm, 2mm and 2.5mm. When the diameter of the needle core body 2 is 0.88mm or 1mm, the length of the needle core body 2 is 100mm; when the diameter of the needle core body 2 is 1.5mm, 2.0mm or 2.5mm, the length of the needle core body 2 is 150mm. Through this structure, it is convenient to use guide tools of corresponding sizes for Kirschner wires of different diameters. The length of the guide tube 1 is the same or similar to that of the needle core body 2, ensuring that the needle core can cooperate well with the guide tube 1 and improving the safety of the operation. At the same time, it is ensured that the length of the guide tube 1 is slightly smaller than the length of the Kirschner wire, ensuring that the Kirschner wire can reach the required depth position.
[0033] The working principle of the utility model is as follows: according to the type of Kirschner wire to be drilled, a Kirschner wire guide tool with the same model of guide hole diameter as the Kirschner wire diameter is selected. A small incision is made on the skin surface where the Kirschner wire needs to be inserted, and the assembled guide tool is inserted into the bone surface from the skin surface as a whole. During the puncture process, the needle core and the guide tube 1 are held by hand so that the needle core and the guide tube 1 form a tight whole, thereby reducing the probability of damage to the soft tissue. After reaching the bone surface, the needle insertion point and the tilt direction of the guide tube 1 are adjusted according to the needs of the operation, and the needle core is pulled out. The guide tube 1 is fixed on the bone surface and the direction is kept inconvenient, and the Kirschner wire is drilled from the guide hole by an electric drill. During the operation, through the perspective of the photo, when the guide tube 1 is offset from the correct insertion point, the guide tube 1 is rotated and displaced several times at a fixed point through the two tapered parts 11 according to the offset direction until it moves to the target insertion point, and then the Kirschner wire is inserted.
[0034] Embodiment 2:
[0035] Figures 7 to 9 The second embodiment of the utility model is shown, and its overall structure is basically the same as that of the Kirschner wire guide tool in the first embodiment, except that the needle core in this embodiment is made of steel pipe, the top of the needle core body 2 is bent 45° to form a connecting rod 32, and then an elliptical clamp ring 31 is bent around the needle core to form a hand-held part 3. The needle core with this structure has better integrity, is easy to process, and is easy to use.
[0036] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.
Claims
1. A Kirschner wire guiding tool, characterized in that: The invention comprises a guide tube (1), wherein the guide tube (1) comprises a first end portion (13), and the first end portion (13) is provided with two tapered portions (11) distributed at intervals; and further comprises a needle core detachably connected to the guide tube (1); the needle core comprises a needle core body (2) inserted into the guide tube (1), and the needle core body (2) comprises a second end portion (21); after the needle core body (2) is inserted into the guide tube (1), the second end portion (21) is located between the two tapered portions (11).
2. The Kirschner wire guide tool according to claim 1, characterized in that: The needle core also includes a hand-held portion (3) for hand-holding, wherein the hand-held portion (3) is arranged on the other end of the needle core body (2) relative to the second end portion (21), and the hand-held portion (3) is provided with a clamping ring (31) that can be sleeved and clamped on the outside of the guide tube (1).
3. The Kirschner wire guiding tool according to claim 2, characterized in that: The clamping ring (31) is in the shape of an elongated strip and comprises a clamping rod (311) which can contact the outer wall of the guide tube (1) when the needle core body (2) is inserted into the guide tube (1). The clamping rod (311) is distributed at intervals on both sides of the needle core body (2).
4. The Kirschner wire guiding tool according to claim 3, characterized in that: The hand-held portion (3) is provided with a connecting rod (32) connecting the clamp ring (31) and the needle core body (2); the guide tube (1) is provided with an engaging opening (12) at the other end relative to the first end (13) and capable of forming an engaging connection with the connecting rod (32) to limit the circumferential rotation of the needle core body (2) in the guide tube (1).
5. The Kirschner wire guiding tool according to claim 4, characterized in that: The transverse width of the fitting opening (12) is the same as the width of the connecting rod (32).
6. The Kirschner wire guiding tool according to any one of claims 1 to 5, characterized in that: The diameter of the needle core body (2) is the same as the inner hole diameter of the guide tube (1); after the needle core is inserted into the guide hole, the first end (13) and the second end (21) are combined to form a wedge shape with two inclined surfaces (4).
7. The Kirschner wire guiding tool according to claim 6, characterized in that: The spacing distance between the ends of the two tapered portions (11) is the same as the inner diameter of the guide tube (1), and the inner diameter of the guide tube (1) is the same as the outer diameter of the Kirschner wire.