A femoral head extractor

Abstract

The application relates to the technical field of medical devices, in particular to a femoral head extractor which comprises a main drill rod and a side drill rod. The main drill rod has a threaded end and a transmission end, the threaded end is used for drilling a threaded hole in a femoral head and connecting with the femoral head, the transmission end transmits power to the threaded end, a matching through hole is arranged on the transmission end, and the matching through hole has an included angle with the axis of the main drill rod; the side drill rod is installed in the matching through hole, the side drill rod is drilled into the femoral head and fixed with the femoral head. The femoral head extractor provided by the application realizes double fixation of the femoral head through the cooperation of the main drill rod and the side drill rod. The main drill rod is used for drilling a hole, and the side drill rod ensures that the femoral head remains stable during rotation, thereby improving the accuracy and efficiency in the operation process.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a femoral head extraction device. Background Technology

[0002] As an important tool in the field of medical devices, femoral head extraction devices have undergone several stages of technological innovation in their development. With the continuous advancement of medical technology and the increasing demand for surgery, the design and use of femoral head extraction devices have received increasing attention. However, in practical applications, existing femoral head extraction devices still have some problems that urgently need to be solved.

[0003] One particularly prominent problem is that when drilling holes in the femoral head to fix it in place, the femoral head often rotates during removal, which may prevent it from being removed smoothly, causing unnecessary trouble and risks for the patient's treatment. Utility Model Content

[0004] The purpose of this application is to provide a femoral head extraction device that prevents the femoral head from rotating during extraction, thereby improving surgical efficiency and effectiveness and reducing surgical risks.

[0005] To achieve the above objectives, embodiments of this application provide a femoral head extraction device, including a main drill rod and a side drill rod. The main drill rod has a threaded end and a drive end. The threaded end is used to drill a threaded hole into the femoral head and connect to it. The drive end drives the device to the threaded end. The drive end is provided with a mating through hole, which forms an angle with the axis of the main drill rod. The side drill rod is installed in the mating through hole.

[0006] In one embodiment, the end face of the side drill rod away from the femoral head has a connecting groove.

[0007] In one embodiment, a rotating handle is provided on the end of the transmission end that is away from the threaded end.

[0008] In one embodiment, the rotating handle is provided with a connecting through hole, which is coaxially arranged with the mating through hole, and the side drill rod is installed at the connecting through hole of the rotating handle and the mating through hole of the main drill rod.

[0009] In one embodiment, the threaded end has a conical structure and the outer wall is provided with threads.

[0010] In one embodiment, the end of the side drill rod used for drilling the femoral head has a conical structure and threads on its outer wall.

[0011] In one embodiment, the inner wall of the mating through hole is provided with an internal thread, and the outer wall of the side drill rod that mates with the mating through hole is provided with an external thread that mates with the internal thread of the mating through hole.

[0012] In one embodiment, a mating sleeve is provided at the mating through hole of the main drill rod. The mating sleeve is coaxially arranged with the mating through hole, and the inner diameter of the mating sleeve is equal to the inner diameter of the mating through hole. The side drill rod is installed in the mating sleeve and the mating through hole.

[0013] In one embodiment, the mating sleeve is provided with an internal thread, and the outer wall of the side drill rod is provided with an external thread that mates with the internal thread of the mating through hole.

[0014] In one embodiment, at least two mating through holes are provided, and at least two side drill rods and mating through holes are provided respectively. The mating through holes are staggered and do not communicate with each other.

[0015] The femoral head extraction device provided in the embodiments of this application achieves dual fixation of the femoral head through the cooperative design of the main drill rod and the side drill rod. The main drill rod is used to drill holes, and the fixation effect of the side drill rod reduces the risk of rotation and displacement of the femoral head during the operation. When removing the femoral head, the side drill rod can reduce the relative rotation of the femoral head, thereby reducing the possibility of damage to surrounding tissues.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of one embodiment of a femoral head extraction device provided in this application; Figure 2 A schematic diagram of the structure from one perspective of another embodiment of a femoral head extraction device provided in this application; Figure 3 This is a two-view structural schematic diagram of another embodiment of a femoral head extraction device provided in this application. Figure 4 for Figure 3 Sectional view along the middle AA direction; Figure 5A schematic diagram of a partial structure of one embodiment of a femoral head extraction device provided in this application; Figure 6 A three-view structural schematic diagram of another embodiment of a femoral head extraction device provided in this application; Figure 7 A three-view structural schematic diagram of an embodiment of a femoral head extraction device provided in this application; Figure 8 A three-view structural schematic diagram of another embodiment of a femoral head extraction device provided in this application; Figure 9 This is a schematic structural diagram from a perspective of a partial structure of another embodiment of a femoral head extraction device provided in this application.

[0019] icon: 100 - Main drill rod; 110 - Threaded end; 120 - Drive end; 130 - Mating through hole; 140 - Connecting through hole; 200 - Side drill pipe; 210 - Connecting slot; 300-Turn the handle; 400 - Fitting sleeve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Embodiments of this application provide a femoral head extraction device for removing the femoral head, such as... Figure 1 As shown, the femoral head includes a main drill rod 100 and a side drill rod 200.

[0024] The main drill rod 100 has a threaded end 110 and a drive end 120. The threaded end 110 is used to drill a threaded hole into the femoral head and connect to the femoral head. The drive end 120 drives the threaded end 110. During use, the doctor rotates the end to drive the threaded end 110 to rotate, and the threaded end 110 rotates to drill into the femoral head.

[0025] like Figure 1 and Figure 3 As shown, a mating through hole 130 is provided on the transmission end 120, and the mating through hole 130 has an angle with the axis of the main drill rod 100.

[0026] like Figure 1 As shown, the side drill rod 200 is installed in the mating through hole 130, so that the side drill rod 200 and the main drill rod 100 are arranged crosswise. The contact point between the side drill rod 200 and the femoral head and the contact point between the main drill rod 100 and the femoral head do not coincide. The two contact points fix the femoral head in the rotation direction, preventing the femoral head from rotating and causing damage to the surrounding tissues when it is removed.

[0027] The contact points between the side drill rod 200 and the femoral head are not coincident with those between the main drill rod 100 and the femoral head. This design allows for better fixation of the femoral head in the direction of rotation. Even when subjected to external forces during surgery, the femoral head is less prone to rotation or displacement, thus enhancing surgical stability.

[0028] The 200mm side drill rod is drilled into the femoral head and fixed thereto.

[0029] The combined design of the main drill rod 100 and the side drill rod 200 achieves dual fixation of the femoral head. The main drill rod 100 is used to drill holes, while the side drill rod 200 ensures that the femoral head remains stable during rotation, improving the accuracy and efficiency of the surgical procedure.

[0030] The fixation provided by the lateral drill rod 200 reduces the risk of rotation and displacement of the femoral head during surgery, thereby reducing the possibility of damage to surrounding tissues.

[0031] like Figure 5 As shown, in one embodiment, the end face of the side drill rod 200 away from the femoral head has a connecting groove 210. The connecting groove 210 can be adapted to the drill bit of the drilling machine, so that the drill bit can be connected to the side drill rod 200 through the connecting groove 210.

[0032] The femoral head extraction device provided in the embodiments of this application has a connecting groove 210 on the end face of the side drill rod 200 that can be adapted to the drill bit of the drilling machine. This design ensures a firm connection between the drill bit and the side drill rod 200. During the operation, the drill bit will not easily fall off or loosen due to external forces, thereby improving the stability and safety of the operation.

[0033] The drill bit can be quickly connected and disconnected from the side drill rod 200 via the connecting slot 210. This design simplifies surgical procedures, reduces operation time during surgery, allows surgeons to focus more on the operation itself, and improves surgical efficiency.

[0034] In another embodiment, a magnetic element is embedded in the inner wall of the connecting slot 210, which magnetically connects the drill bit. By embedding the magnetic element in the inner wall of the connecting slot 210, the drill bit can be quickly and stably connected to the side drill rod 200. The magnetic connection force provided by the magnetic element ensures that the drill bit will not easily fall off due to vibration or external force during the operation, thereby improving the stability and safety of the surgical procedure.

[0035] The magnetic connection allows the drill bit to be positioned in the connecting slot 210 more quickly, reducing interruptions during the procedure. This helps surgeons focus more on the surgical operation, improving efficiency and shortening the patient's operative time.

[0036] like Figure 1 As shown, in one embodiment, a rotating handle 300 is provided on the end of the transmission end 120 away from the threaded end 110.

[0037] The femoral head extraction device provided in the embodiments of this application improves operational convenience through the provided rotating handle 300. The rotating handle 300, located on the transmission end 120, allows the surgeon to rotate the main drill rod 100 more easily and conveniently. The rotating handle 300 provides a larger grip area and a better grip feel, reducing fatigue during operation and improving the comfort and convenience of the surgery.

[0038] The femoral head extraction device provided in the embodiments of this application enhances control precision through a rotating handle 300. The design of the rotating handle 300 allows the surgeon to more precisely control the rotation speed and direction of the main drill rod 100. By rotating the handle, the surgeon can intuitively feel the force and feedback of the rotation, thereby more accurately adjusting the surgical operation and improving the precision and success rate of the surgery.

[0039] The femoral head extraction device provided in this application improves surgical safety through the inclusion of a rotating handle 300. The rotating handle 300 provides the surgeon with a stable operating point, reducing the risk of hand slippage or errors during surgery. The stability and ease of grip of the handle ensure the stability of the surgical procedure and reduce the probability of surgical complications.

[0040] In another embodiment, the rotating handle 300 is detachably connected to the transmission end 120, which facilitates the replacement of rotating handles 300 of different sizes, such as replacing rotating handles 300 with larger or smaller diameters, or replacing rotating handles 300 with larger or smaller lengths, or replacing straight rotating handles 300 with curved rotating handles 300, etc., so that the femoral head extractor can be adapted to different surgical scenarios.

[0041] Detachable connection methods include threaded connections or snap-fit ​​connections.

[0042] like Figure 1 As shown, in one embodiment, the threaded end 110 has a conical structure and the outer wall is provided with threads.

[0043] like Figure 1 As shown, in one embodiment, the end of the side drill rod 200 used for drilling the femoral head has a conical structure and threads on its outer wall.

[0044] Both the threaded end 110 and the side drill rod 200, used for drilling the femoral head, are designed with a conical structure. This design allows the contact area to gradually increase as the drill bit penetrates deeper during drilling, thus providing a more stable drilling force. The conical structure also helps reduce resistance during drilling and improves drilling efficiency.

[0045] The conical outer wall is threaded, which increases the friction between the drill bit and the femoral head, helping to more stably fix the drill bit in the femoral head and preventing it from slipping during drilling. At the same time, the threads also help to more effectively remove debris generated during drilling, keeping the drill hole clean and improving drilling accuracy.

[0046] Conical threaded connections have a self-tightening effect, meaning that as the drill bit goes deeper, the gap between the threads gradually decreases, thus achieving a tighter connection and enhancing the connection stability between the drill bit and the femoral head.

[0047] The tapered thread design of the threaded end 110 and the side drill rod 200 helps to secure the drill bit more firmly and prevent slippage during drilling. This helps protect patient safety and reduces surgical risks.

[0048] A stable drilling process and precise drilling depth help improve surgical quality and reduce complications caused by improper drilling. The conical thread design helps achieve this goal, improving the reliability and success rate of the procedure.

[0049] The conical thread design allows the drill bit to adapt more flexibly to different shapes and sizes of femoral head ends. This versatility helps meet the surgical needs of different patients and improves the utilization rate of the equipment.

[0050] In one embodiment, an internal thread is provided on the inner wall of the through hole 130, such as... Figure 5 As shown, the outer wall of the side drill rod 200 that mates with the through hole 130 is provided with an external thread that mates with the internal thread of the through hole 130. During the rotation of the side drill rod 200, it can move axially within the through hole 130, which facilitates the side drill rod 200 drilling into the femoral head.

[0051] The internal thread on the inner wall of the through hole 130 engages with the external thread on the side drill rod 200 to form a helical drive mechanism. During the rotation of the side drill rod 200, this helical drive mechanism guides the side drill rod 200 to move axially within the through hole 130. This design makes the drilling process both stable and controllable; the surgeon can precisely control the drilling depth and speed by controlling the rotation speed and direction of the side drill rod 200.

[0052] The engagement of internal and external threads makes the connection between the side drill rod 200 and the mating through hole 130 more secure and reliable. During the operation, the side drill rod 200 needs to withstand a large drilling force and torque, and the threaded connection can effectively prevent the side drill rod 200 from slipping or breaking during drilling, ensuring the smooth progress of the operation.

[0053] By controlling the number of rotations of the side drill rod 200, the surgeon can precisely control the drilling depth. This design makes the surgical procedure more flexible and controllable, allowing the surgeon to adjust the drilling depth and speed at any time according to the patient's specific condition and surgical needs.

[0054] like Figure 1 As shown, in one embodiment, a mating sleeve 400 is provided at the mating through hole 130 of the main drill rod 100. The mating sleeve 400 is coaxially arranged with the mating through hole 130, and the inner diameter of the mating sleeve 400 is equal to the inner diameter of the mating through hole 130.

[0055] The side drill rod 200 is installed in the mating sleeve 400 and the mating through hole 130.

[0056] For example, the sleeve 400 is fixedly installed at the mating through hole 130 of the main drill rod 100 by means of welding, gluing, snap-fitting, bolting or integral molding.

[0057] The femoral head extraction device provided in the embodiments of this application has a sleeve 400 and a through hole 130 coaxially arranged with equal inner diameters, which ensures that the side drill rod 200 can be accurately aligned during installation. This design improves the fitting accuracy between the side drill rod 200 and the main drill rod 100, making the side drill rod 200 more stable during rotation and axial movement, reducing wobble and sway, thereby improving the accuracy and reliability of drilling.

[0058] The fitted sleeve 400 provides additional support for the side drill rod 200, enhancing the load-bearing capacity of the entire mechanical structure. During drilling, the side drill rod 200 is subjected to significant forces and torques; the fitted sleeve 400 effectively disperses these forces, reducing wear on the inner wall of the mating through hole 130 and extending the service life of the mechanical structure.

[0059] In another embodiment, the mating sleeve 400 is threaded onto the mating through hole 130 of the main drill rod 100, so that the mating sleeve 400 can be detachably mounted on the main drill rod 100. One main drill rod 100 is equipped with multiple mating sleeves 400, and the inner diameters of the different mating sleeves 400 are different. The mating sleeves 400 with different inner diameters are equipped with side drill rods 200 of different diameters. In this embodiment, the mating through hole 130 serves as the mounting base for the mating sleeve 400 and no longer provides limitation and support for the side drill rod 200.

[0060] In this embodiment, the mating sleeve 400 is detachably installed by threading it onto the mating through hole 130 of the main drill rod 100. This means that doctors or operators can quickly replace mating sleeves 400 with different inner diameters to accommodate side drill rods 200 of different diameters, depending on the surgical needs. This design greatly improves the flexibility and versatility of the mechanical structure, enabling the same set of equipment to handle a wider variety of surgical situations.

[0061] In this embodiment, different surgeries may require side drill rods 200 of different diameters to achieve optimal surgical results. By using matching sleeves 400 with different inner diameters, precise matching between the side drill rod 200 and the surgical site can be ensured, thereby improving surgical accuracy and success rate. This customized approach helps optimize surgical outcomes and promote patient recovery.

[0062] Typically, to accommodate side drill pipes 200 of different diameters, multiple sets of main drill pipes 100 and matching sleeves 400 of different specifications may need to be prepared. However, in this embodiment, a single set of main drill pipes 100 paired with multiple matching sleeves 400 of different inner diameters can meet various surgical needs. This design reduces the need for repeated purchases of equipment and tools, lowers costs, and also reduces resource waste.

[0063] In one embodiment, such as Figure 9 As shown, the end of the side drill rod 200 is provided with external threads, but in another embodiment, the mating sleeve 400 is provided with internal threads, such as... Figure 5 As shown, the outer wall of the side drill rod 200 is provided with an external thread that mates with the internal thread of the mating through hole 130. The external thread is distributed on the circumferential surface of the side drill rod.

[0064] By providing an internal thread within the sleeve 400 and a matching external thread on the outer wall of the side drill rod 200, a threaded connection is achieved between the side drill rod 200 and the sleeve 400 on the main drill rod 100. This threaded connection is self-locking, maintaining a stable connection during rotation of the side drill rod 200 and preventing loosening or detachment. This enhances the stability and reliability of the mechanical structure during surgery, ensuring a smooth procedure.

[0065] The threaded connection allows for precise axial movement of the side drill rod 200 within the mating sleeve 400. Surgeons or operators can precisely control the drilling depth and location by controlling the rotational speed and direction of the side drill rod 200. This precision and controllability are particularly important in orthopedic surgeries and other procedures requiring precise manipulation, contributing to improved surgical success rates and patient recovery.

[0066] like Figure 2 As shown, in one embodiment, at least two through holes 130 are provided, and at least two side drill rods 200 are provided corresponding to the through holes 130.

[0067] like Figure 3 and Figure 4 As shown, the through holes 130 are staggered and not connected to each other. Correspondingly, the sleeves 400 are also not connected to each other to prevent interference between the side drill rods 200.

[0068] For example, in this embodiment, such as Figure 2 As shown, two through holes 130 are provided, and correspondingly, two side drill rods 200 and two mating sleeves 400 are provided. In another embodiment, three through holes 130 are provided, and correspondingly, three side drill rods 200 and three mating sleeves 400 are provided. In yet another embodiment, four through holes 130 are provided, and correspondingly, four side drill rods 200 and four mating sleeves 400 are provided.

[0069] In this embodiment, by providing multiple mating through holes 130 and corresponding side drill rods 200, doctors or operators can selectively use different numbers of side drill rods 200 according to the actual needs of the surgery. This design improves the flexibility of surgical operations, making the surgical process more adaptable to different surgical scenarios and needs.

[0070] In this embodiment, by staggering and not communicating with each other, the corresponding side drill rods 200 are ensured not to interfere with each other, and at least two side drill rods 200 can be used at the same time, thereby ensuring the normal progress of the operation.

[0071] like Figure 6 As shown, in one embodiment, the rotating handle 300 is provided with a connecting through hole 140, which is coaxially arranged with the mating through hole 130. The side drill rod 200 is installed at the connecting through hole 140 of the rotating handle 300 and the mating through hole 130 of the main drill rod 100. The inner wall of the connecting through hole 140 is a smooth wall surface. However, in another embodiment, the inner wall of the connecting through hole 140 is provided with an internal thread that mates with the external thread on the side drill rod 200.

[0072] like Figure 6 As shown, in this embodiment, the fitting sleeve 400 is omitted, reducing the weight of the femoral head extraction device.

[0073] A connecting through hole 140 is provided on the rotating handle 300, and it is coaxially arranged with the mating through hole 130, making the installation position of the side drill rod 200 clearer and more intuitive. The operator can easily install the side drill rod 200 at the connecting through hole 140 of the rotating handle 300, and then install the side drill rod 200 into the mating through hole 130 of the main drill rod 100, without the need for complicated alignment and adjustment operations, thereby improving the convenience of operation.

[0074] By installing the side drill rod 200 at the connecting through hole 140 of the rotating handle 300 and the mating through hole 130 of the main drill rod 100, a firm connection between the side drill rod 200, the main drill rod 100, and the rotating handle 300 is achieved.

[0075] However, in another embodiment, such as Figure 7 As shown, a fitting sleeve 400 is added at the fitting through hole 130 of the main drill pipe 100. (As indicated...) Figure 8 As shown, in another embodiment, the main drill rod 100 and the rotating handle 300 are connected by a sleeve 400.

[0076] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0077] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A femoral head extraction device, characterized in that, include: The main drill rod (100) has a threaded end (110) and a transmission end (120). The threaded end (110) is used to drill a threaded hole into the femoral head and connect to the femoral head. The transmission end (120) drives the threaded end (110). The transmission end (120) is provided with a mating through hole (130). The mating through hole (130) has an angle with the axis of the main drill rod (100). Side drill rod (200), which is installed in the mating through hole (130).

2. The femoral head extraction device according to claim 1, characterized in that, The side drill rod (200) has a connecting groove (210) on the end face away from the femoral head.

3. The femoral head extraction device according to claim 1, characterized in that, A rotating handle (300) is provided on the end of the transmission end (120) away from the threaded end (110).

4. The femoral head extraction device according to claim 3, characterized in that, The rotating handle (300) is provided with a connecting through hole (140), which is coaxially arranged with the mating through hole (130). The side drill rod (200) is installed at the connecting through hole (140) of the rotating handle (300) and at the mating through hole (130) of the main drill rod (100).

5. The femoral head extraction device according to claim 1, characterized in that, The threaded end (110) has a conical structure and the outer wall is provided with threads.

6. The femoral head extraction device according to claim 1, characterized in that, The side drill rod (200) is used to drill the femoral head. One end of the rod is conical and has threads on its outer wall.

7. The femoral head extraction device according to claim 1, characterized in that, The inner wall of the mating through hole (130) is provided with an internal thread, and the outer wall of the side drill rod (200) that mates with the mating through hole (130) is provided with an external thread that mates with the internal thread of the mating through hole (130).

8. The femoral head extraction device according to claim 1, characterized in that, A fitting sleeve (400) is provided at the fitting through hole (130) of the main drill rod (100). The fitting sleeve (400) is coaxially arranged with the fitting through hole (130). The inner diameter of the fitting sleeve (400) is equal to the inner diameter of the fitting through hole (130). The side drill rod (200) is installed in the fitting sleeve (400) and the fitting through hole (130).

9. The femoral head extraction device according to claim 8, characterized in that, The sleeve (400) is provided with an internal thread, and the outer wall of the side drill rod (200) is provided with an external thread that engages with the internal thread of the through hole (130).

10. The femoral head extraction device according to any one of claims 1 to 9, characterized in that, At least two mating through holes (130) are provided, and at least two side drill rods (200) are provided corresponding to the mating through holes (130). The mating through holes (130) are staggered and do not communicate with each other.

Images