An intramedullary nail implantation navigation device

Abstract

The present invention provides an intramedullary nail implantation navigation device, belonging to the technical field of medical devices. Its main function is to place a sensor in the intramedullary nail to perform navigation and positioning on the screw holes of the intramedullary nail. The main structure of an intramedullary nail implantation navigation device includes a displacement adjustment component, an intramedullary nail locking component, and a sensing component. The displacement adjustment component includes an inner sliding cylinder and an outer sleeve, and the inner sliding cylinder is disposed through the outer sleeve; the intramedullary nail locking component includes an intramedullary nail locking inner cylinder and a sensing wire positioning outer cylinder, and the rear end of the sensing wire positioning outer cylinder is disposed through the front end of the outer sleeve, and the front end of the sensing wire positioning outer cylinder is disposed through the rear end of the intramedullary nail locking inner cylinder; the sensing component includes a complete set of chips and a flexible sensing wire, a sensor for performing positioning navigation is provided at the front end of the flexible sensing wire, the complete set of chips is disposed through the inner sliding cylinder, and the flexible sensing wire passes out from the front end of the inner sliding cylinder.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to an intramedullary nail implantation navigation device. Background Art

[0002] Intertrochanteric fractures are a common fracture condition that often occurs in the elderly. Currently, intramedullary nails are often used to fix the fracture site. After the nail is implanted, fixation screws are required to secure the nail. The screw holes in the nail are located in the patient's body, and the screws are inserted in different directions at different screw holes. Furthermore, during the nail's insertion into the femoral medullary cavity, the nail can bend and deform due to the influence of the bone, making it more difficult to locate the screw holes and hindering the positioning of the fixation screws. Screw hole positioning directly affects the duration of the surgery and can even lead to positioning errors, causing injury to the patient. Therefore, accurate screw hole positioning is crucial, directly impacting the quality and duration of the surgery, as well as the patient's postoperative recovery. Generally, the proximal end of the nail can be first identified to estimate the location of the screw hole, or X-ray imaging can be used to assist in finding the screw hole. However, X-rays generate a large amount of radiation, which is harmful to the health of patients and medical staff. Furthermore, X-ray imaging equipment has poor sensitivity to hole location, which can lead to inaccurate positioning and even failure of the femoral nail fixation. Summary of the Invention

[0003] The purpose of the present invention is to provide an intramedullary nail implantation navigation device, aiming to solve the problem that screw holes on femoral intramedullary nails are difficult to locate and fixing screws are difficult to install.

[0004] To achieve the above-mentioned object, the present invention adopts a technical solution as follows: providing an intramedullary nail implantation navigation device, comprising: a displacement adjustment assembly, the displacement adjustment assembly comprising an inner sliding cylinder and an outer sleeve arranged to slide relative to each other, the inner sliding cylinder being inserted into the outer sleeve;

[0005] an intramedullary nail locking member, the intramedullary nail locking member comprising an intramedullary nail locking inner cylinder and a sensor line positioning outer cylinder, the rear end of the sensor line positioning outer cylinder being passed through the front end of the outer cylinder, the front end of the sensor line positioning outer cylinder being passed through the rear end of the intramedullary nail locking inner cylinder, the front end of the intramedullary nail locking inner cylinder being threadedly connected to the rear end of the intramedullary nail; and

[0006] A sensing component, the sensing component includes a packaged chip and a flexible sensing wire. The packaged chip is inserted into the inner sliding cylinder. The rear end of the flexible sensing wire is connected to the packaged chip. The front end of the flexible sensing wire is provided with a sensor for positioning and navigation. The flexible sensing wire sequentially passes through the inner sliding cylinder, the sensing wire positioning outer cylinder, and the intramedullary nail locking inner cylinder and extends into the inner cavity of the intramedullary nail.

[0007] In a possible implementation manner, it further includes a sensing wire locking component. The sensing wire locking component includes a sensing wire locking inner cylinder and a sensing wire locking outer cylinder. The sensing wire locking outer cylinder is fixedly installed at the front end of the inner sliding cylinder. The rear end of the sensing wire locking inner cylinder is detachably arranged in the sensing wire locking outer cylinder. The flexible sensing wire penetrates through the sensing wire locking outer cylinder and the sensing wire locking inner cylinder. The sensing wire locking inner cylinder and the sensing wire locking outer cylinder cooperate to lock the flexible sensing wire.

[0008] In a possible implementation manner, a plurality of sensing wire limiting claw pieces are circumferentially arranged at the rear end of the sensing wire locking inner cylinder. The outer diameter of the sensing wire limiting claw pieces gradually decreases towards the free end. A sensing wire limiting groove is arranged at the rear end of the inner cavity of the sensing wire locking outer cylinder. The sensing wire limiting claw pieces are located in the sensing wire limiting groove. The sensing wire locking outer cylinder is threadedly connected to the sensing wire locking inner cylinder. The sensing wire locking outer cylinder applies a force to the sensing wire limiting claw pieces through the side wall of the sensing wire limiting groove, causing the sensing wire limiting claw pieces to approach each other, thereby locking the flexible sensing wire.

[0009] In a possible implementation manner, a positioning groove is arranged at the rear end of the intramedullary nail locking inner cylinder. A plurality of positioning claw pieces are circumferentially arranged at the front end of the sensing wire positioning outer cylinder. The positioning claw pieces are located inside the positioning groove. The shape of the inner wall of the positioning groove matches the outer side wall of the positioning claw pieces. A positioning portion is arranged at the front end of the sensing wire locking inner cylinder. The positioning portion is inserted into the inner cavity formed by the positioning claw pieces, pressing the positioning claw pieces tightly in the positioning groove.

[0010] In a possible implementation manner, the diameter of the positioning portion gradually decreases towards the free end, and the distance between the inner side walls of the positioning claw pieces gradually decreases towards the free end.

[0011] In a possible implementation manner, a rotating cylinder (14) is further provided. The rotating cylinder is rotatably arranged at the rear end of the outer sleeve. The rotating cylinder is threadedly connected to the rear end of the inner sliding cylinder.

[0012] In one possible implementation, the front end of the outer sleeve is detachably provided with an outer sleeve end cover, and the outer sleeve end cover is provided with a clearance hole suitable for the front end of the sensing line positioning outer sleeve to pass through, and the rear end of the sensing line positioning outer sleeve is provided with a stopper, and the diameter of the stopper is larger than the diameter of the clearance hole.

[0013] In one possible implementation, the rear end cover of the outer cylinder end cover is arranged at the front end of the outer cylinder, a limit stop column is provided on the inner side wall of the rear end of the outer cylinder end cover, and a limit stop groove is provided on the side wall of the front end of the outer cylinder, and the limit stop groove includes an axial groove and a circumferential groove, the axial groove is arranged along the axial direction of the outer cylinder, the circumferential groove is arranged at the end of the axial groove away from the front end of the outer cylinder, and the circumferential groove is arranged along the circumferential direction of the outer cylinder, and the limit stop column slides into the circumferential groove along the axial groove to fix the outer cylinder end cover to the front end of the outer cylinder.

[0014] In one possible implementation, a holding assembly is also provided, which includes an intramedullary nail locking outer cylinder and a handle. The intramedullary nail locking outer cylinder is sleeved on the outer peripheral side of the intramedullary nail locking inner cylinder. A limiting block is provided at the front end of the intramedullary nail locking outer cylinder. The limiting block is clamped in the anti-rotation groove at the rear end of the intramedullary nail to limit the position of the intramedullary nail. The handle is provided at the rear end of the intramedullary nail locking outer cylinder.

[0015] In a possible implementation, weight-reducing grooves are respectively provided on the side walls of the inner sliding cylinder and the outer sleeve.

[0016] The beneficial effects of the intramedullary nail implantation navigation device provided by the present invention are:

[0017] Compared with the prior art, a displacement adjustment component, an intramedullary nail locking part and a sensor component are provided. The displacement adjustment component includes an inner sliding cylinder and an outer sleeve. The inner sliding cylinder is relatively slidably arranged in the outer sleeve. The intramedullary nail locking part includes an intramedullary nail locking inner cylinder and a sensor line positioning outer cylinder. The intramedullary nail locking inner cylinder is arranged at the rear end of the intramedullary nail for easy fixation with the intramedullary nail. The sensor component includes an assembled chip and a flexible sensor line. The assembled chip is connected to the flexible sensor line. With the help of the flexible sensor line, the sensor located at the front end of the flexible sensor line is placed in a specified position. The position signal of the sensor is transmitted to the assembled chip for navigation and positioning of the screw hole. The assembled chip is arranged in the inner sliding cylinder. The position of the sensor at the front end of the flexible sensor line is adjusted by adjusting the position of the inner sliding cylinder in the outer sleeve, which is convenient for limiting the length of the flexible sensor line in the intramedullary nail and increasing the stability of the device. The sensor line positioning outer cylinder is arranged at the front end of the outer sleeve. The front end of the sensor line positioning outer cylinder is passed through the rear end of the intramedullary nail locking inner cylinder, which is convenient for the sensor to be placed in the specified position and increases the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 Structural schematic of the sensing navigation device provided by the embodiment of the present invention Figure 1 ;

[0020] Figure 2 Structural schematic of the sensing navigation device provided by the embodiment of the present invention Figure 2 ;

[0021] Figure 3 Exploded decomposition structural schematic of the sensing navigation device provided by the embodiment of the present invention Figure 1 ;

[0022] Figure 4 Exploded decomposition structural schematic of the sensing navigation device provided by the embodiment of the present invention Figure 2 ;

[0023] Figure 5 Exploded decomposition structural schematic of the sensing navigation device provided by the embodiment of the present invention Figure 3 ;

[0024] Figure 6 Structural schematic diagram of the outer sleeve and the outer cylinder end cover adopted in the embodiment of the present invention;

[0025] Figure 7 Cross-sectional structural schematic of the sensing navigation device provided by the embodiment of the present invention.

[0026] In the figure: 1, integrated chip; 2, flexible sensing line; 3, sensor; 4, inner sliding cylinder; 5, outer sleeve; 6, intramedullary nail locking inner cylinder; 7, sensing line positioning outer cylinder; 8, sensing line locking inner cylinder; 9, sensing line locking outer cylinder; 10, sensing line limiting claw piece; 11, first thread part; 12, positioning claw piece; 13, positioning part; 14, rotating cylinder; 15, clamping block; 16, outer cylinder end cover; 17, stop block; 18, positioning rotating block; 19, limiting stop column; 20, axial groove; 21, circumferential groove; 22, gear position groove; 23, positioning button; 24, top spring; 25, intramedullary nail locking outer cylinder; 26, handle; 27, limiting block; 28, weight reduction groove; 29, intramedullary nail; 30, screw hole. Detailed implementation manners

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Please refer to Figures 1 to 7 , and a specific implementation manner of an intramedullary nail implantation navigation device provided by the present invention will be described. It includes: a displacement adjustment component, an intramedullary nail locking member, and a sensing component; the displacement adjustment component includes an inner sliding cylinder 4 and an outer sleeve 5 that are relatively slidably arranged. The integrated chip 1 is disposed through the inner sliding cylinder 4, and the inner sliding cylinder 4 is disposed through the outer sleeve 5; the intramedullary nail locking member includes an intramedullary nail locking inner cylinder 6 and a sensing wire positioning outer cylinder 7. The rear end of the sensing wire positioning outer cylinder 7 is disposed through the front end of the outer sleeve 5, and the front end of the sensing wire positioning outer cylinder 7 is disposed through the rear end of the intramedullary nail locking inner cylinder 6. The front end of the intramedullary nail locking inner cylinder 6 is threadedly connected to the rear end of the intramedullary nail 29; the sensing component includes an integrated chip 1 and a flexible sensing wire 2. The integrated chip 1 is disposed through the inner sliding cylinder 4. The rear end of the flexible sensing wire 2 is connected to the integrated chip 1. The front end of the flexible sensing wire 2 is provided with a sensor 3 for positioning and navigation. The flexible sensing wire 2 sequentially passes through the inner sliding cylinder 4, the sensing wire positioning outer cylinder 7, and the intramedullary nail locking inner cylinder 6 and extends into the inner cavity of the intramedullary nail 29.

[0029] An intramedullary nail implantation navigation device provided by the present invention, compared with the prior art, is provided with a displacement adjustment component, an intramedullary nail locking member, and a sensing component. The displacement adjustment component includes an inner sliding cylinder 4 and an outer sleeve 5. The inner sliding cylinder 4 is relatively slidably arranged within the outer sleeve 5. By adjusting the position of the inner sliding cylinder 4 within the outer sleeve 5, the position of the sensor 3 at the front end of the flexible sensing wire 2 is adjusted. The intramedullary nail 29 locking member includes an intramedullary nail locking inner cylinder 6 and a sensing wire positioning outer cylinder 7. The intramedullary nail locking inner cylinder 6 is disposed at the rear end of the intramedullary nail 29, facilitating fixation with the intramedullary nail 29. The sensing component includes an integrated chip 1 and a flexible sensing wire 2. The integrated chip 1 is connected to the flexible sensing wire 2. With the aid of the flexible sensing wire 2, the sensor 3 located at the front end of the flexible sensing wire 2 is placed at a specified position. The position signal of the sensor 3 is transmitted to the integrated chip 1 for navigation and positioning of the screw hole 30. The integrated chip 1 is disposed within the inner sliding cylinder 4. By adjusting the position of the inner sliding cylinder 4 within the outer sleeve 5, the position of the sensor 3 at the front end of the flexible sensing wire 2 is adjusted, facilitating the limitation of the length of the flexible sensing wire 2 within the intramedullary nail 29 and increasing the stability of the device during use. The sensing wire positioning outer cylinder 7 is disposed at the front end of the outer sleeve 5, and the front end of the sensing wire positioning outer cylinder 7 is disposed through the rear end of the intramedullary nail locking inner cylinder 6, facilitating the placement of the sensor 3 into the specified position and increasing the convenience of the device during use.

[0030] Specifically, please refer to Figures 1 to 7, including a displacement adjustment component, an intramedullary nail locking component, and a sensing component. The sensing component is used for positioning and navigation of the screw hole 30. The displacement adjustment component is used for adjusting the position of the sensing component. The intramedullary nail 29 locking component is used for connecting with the intramedullary nail 29 and limiting the sensing component, increasing the stability of the device during use. The sensing component includes an integrated chip 1 and a flexible sensing wire 2. The integrated chip 1 is arranged at the rear end of the flexible sensing wire 2. A sensor 3 is arranged at the front end of the flexible sensing wire 2. After the sensor 3 is placed at the specified position, the signal is transmitted to the integrated chip 1. The integrated chip 1 receives and analyzes the signal. According to the set program, the position information of the screw hole 30 around the sensor 3 is obtained. Matching with an external instrument, receiving the position information of the screw hole 30 and cooperating with the sensor 3 to determine the position of the screw and implant the screw. The intramedullary nail 29 locking component includes an intramedullary nail locking inner cylinder 6 and a sensing wire positioning outer cylinder 7. The intramedullary nail locking inner cylinder 6 is used for fixing with the rear end of the intramedullary nail 29, increasing the stability of the device during use. The front end of the intramedullary nail locking inner cylinder 6 is threadedly connected with the rear end of the intramedullary nail 29. The rear end of the sensing wire positioning outer cylinder 7 is arranged at the front end of the outer sleeve 5. The flexible sensing wire 2 passes through the sensing wire positioning outer cylinder 7. The front end of the sensing wire positioning outer cylinder 7 is inserted into the rear end of the intramedullary nail locking inner cylinder 6 to fix the device.

[0031] Further, please refer to Figures 1 to 7 , install the intramedullary nail locking inner cylinder 6 at the rear end of the intramedullary nail 29. The sensing component is an integrated component. According to the specifications of the actually used intramedullary nail 29, different sensing components can be selected, and different length specifications of the flexible sensing wire 2 can be selected. Install the integrated chip 1 into the inner sliding cylinder 4. The flexible sensing wire 2 passes out from the front end of the inner sliding cylinder 4. The inner sliding cylinder 4 is inserted into the outer sleeve 5. The flexible sensing wire 2 passes through the sensing wire positioning outer cylinder 7. The sensing wire positioning outer cylinder 7 abuts against the rear end of the intramedullary nail locking inner cylinder 6. Push the inner sliding cylinder 4 towards the intramedullary nail 29 until the sensor 3 reaches the specified position for positioning and navigation of the screw hole 30.

[0032] As a specific implementation manner of an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7 , it further includes a sensing wire locking component. The sensing wire locking component includes a sensing wire locking inner cylinder 8 and a sensing wire locking outer cylinder 9. The sensing wire locking outer cylinder 9 is fixedly installed at the front end of the inner sliding cylinder 4. The rear end of the sensing wire locking inner cylinder 8 is detachably arranged in the sensing wire locking outer cylinder 9. The flexible sensing wire 2 passes through the sensing wire locking outer cylinder 9 and the sensing wire locking inner cylinder 8. The sensing wire locking inner cylinder 8 and the sensing wire locking outer cylinder 9 cooperate to lock the flexible sensing wire 2.

[0033] Specifically, please refer to Figures 1 to 7, the sensing wire locking assembly is used to lock the flexible sensing wire 2 to the inner sliding cylinder 4. The sensing wire locking assembly includes a sensing wire locking inner cylinder 8 and a sensing wire locking outer cylinder 9. The sensing wire locking outer cylinder 9 is passed through the front end of the inner sliding cylinder 4. A positioning button 23 is provided on the side wall of the sensing wire locking outer cylinder 9. The inner sliding cylinder 4 is provided with a clamping groove, and the clamping groove matches the positioning button 23. The positioning button 23 is clamped in the clamping groove to clamp the sensing wire locking outer cylinder 9 in the inner sliding cylinder 4. The flexible sensing wire 2 sequentially passes through the sensing wire locking outer cylinder 9 and the sensing wire locking inner cylinder 8. When the flexible sensing wire 2 needs to be fixed, the rear end of the sensing wire locking inner cylinder 8 is installed in the inner cavity of the sensing wire locking outer cylinder 9 to lock the flexible sensing wire 2 and fix the flexible sensing wire 2 inside the inner sliding cylinder 4.

[0034] As a specific implementation manner of an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7 , a plurality of sensing wire limiting claw pieces 10 are circumferentially arranged at the rear end of the sensing wire locking inner cylinder 8. The outer diameter of the sensing wire limiting claw pieces 10 gradually decreases towards the free end. A sensing wire limiting groove is provided at the rear end of the inner cavity of the sensing wire locking outer cylinder 9. The sensing wire limiting claw pieces 10 are located in the sensing wire limiting groove. The sensing wire locking outer cylinder 9 is threadedly connected to the sensing wire locking inner cylinder 8. The sensing wire locking outer cylinder 9 applies a force to the sensing wire limiting claw pieces 10 through the side wall of the sensing wire limiting groove, so that the sensing wire limiting claw pieces 10 approach each other, thereby locking the flexible sensing wire 2.

[0035] Specifically, please refer to Figures 1 to 7 , the rear end of the sensing wire locking inner cylinder 8 is provided with sensing wire limiting claw pieces 10. Multiple groups of sensing wire limiting claw pieces 10 are arranged around the rear end of the sensing wire locking inner cylinder 8. The thickness of the sensing wire limiting claw pieces 10 gradually decreases as it approaches the free end. The sensing wire locking outer cylinder 9 is provided with a sensing wire limiting groove. The sensing wire limiting groove is provided at the rear end of the inner cavity of the sensing wire locking outer cylinder 9. The shape of the inner wall of the limiting groove matches the shape of the outer side wall of the sensing wire limiting claw pieces 10. The sensing wire limiting claw pieces 10 are sequentially provided with a first thread portion 11 near the front end of the sensing wire locking inner cylinder 8. A thread structure matching the first thread portion 11 is provided at the front end of the inner cavity of the sensing wire locking outer cylinder 9. By means of the first thread portion 11, the rear end of the sensing wire locking inner cylinder 8 is installed in the inner cavity of the sensing wire locking outer cylinder 9, and the sensing wire limiting claw pieces 10 limit the flexible sensing wire 2.

[0036] As a specific implementation manner of an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7, a positioning groove is provided at the rear end of the intramedullary nail locking inner cylinder 6. A plurality of positioning claw pieces 12 are circumferentially provided at the front end of the sensing wire positioning outer cylinder 7. The positioning claw pieces 12 are located inside the positioning groove. The shape of the inner wall of the positioning groove matches the outer wall shape of the positioning claw pieces 12. A positioning portion 13 is provided at the front end of the sensing wire locking inner cylinder 8. The positioning portion 13 is installed in the inner cavity formed by the positioning claw pieces 12, pressing the positioning claw pieces 12 tightly in the positioning groove.

[0037] Specifically, please refer to Figures 1 to 7 , a positioning groove for connecting the sensing wire positioning outer cylinder 7 is provided at the rear end of the intramedullary nail locking inner cylinder 6. The front end of the sensing wire positioning outer cylinder 7 is provided with positioning claw pieces 12. Multiple groups of positioning claw pieces 12 are arranged around the front end of the sensing wire positioning outer cylinder 7. The outer wall of the positioning claw pieces 12 is spherical. The shape of the inner wall of the positioning groove matches the outer wall shape of the positioning claw pieces 12. A positioning portion 13 is provided at the front end of the sensing wire locking inner cylinder 8. As the inner sliding cylinder 4 moves forward, the positioning portion 13 enters the inner cavity formed by the positioning claw pieces 12, applying an outward expanding force to the positioning claw pieces 12, pressing the positioning claw pieces 12 tightly in the positioning groove, preventing the positioning claw pieces 12 from falling off the positioning groove, restricting the moving distance of the flexible sensing wire 2, and limiting the flexible sensing wire 2.

[0038] As a specific implementation manner of an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7 , the diameter of the positioning portion 13 gradually decreases towards the free end, and the distance between the inner side walls of the positioning claw pieces 12 gradually decreases towards the free end.

[0039] Specifically, please refer to Figures 1 to 7 , the outer diameter of the positioning portion 13 gradually decreases towards the free end. Correspondingly, the distance between the inner side walls of the positioning claw pieces 12 gradually decreases towards the free end, facilitating the positioning portion 13 to penetrate between the positioning claw pieces 12.

[0040] As a specific implementation manner of an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 3 、 Figure 7 , a rotating cylinder 14 is further provided. The rotating cylinder 14 is rotatably arranged at the rear end of the outer sleeve. The rotating cylinder 14 is threadedly connected to the rear end of the inner sliding cylinder 4.

[0041] Specifically, please refer to Figures 1 to 3 、 Figure 7The rear end of the outer sleeve 5 is provided with a rotating cylinder 14, which is used to rotate the inner sliding cylinder 4. The rotating cylinder 14 is rotatably set on the outer sleeve 5, and the front end of the rotating cylinder 14 is provided with a clamping block 15. Multiple groups of clamping blocks 15 are evenly distributed along the circumferential direction of the rotating cylinder 14. The rear end of the outer sleeve 5 is provided with a clamping groove that matches the clamping block 15. The clamping block 15 cooperates with the clamping groove. The front end of the rotating cylinder 14 is penetrated into the rear end of the outer sleeve 5, and the inner wall of the rear end of the rotating cylinder 14 is threadedly connected to the outer wall of the rear end of the inner sliding cylinder 4. By rotating the rotating cylinder 14, the inner sliding cylinder 4 drives the assembled chip 1 to adjust its position.

[0042] As a specific embodiment of the intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7 The front end of the outer sleeve 5 is detachably provided with an outer sleeve end cover 16, and the outer sleeve end cover 16 is provided with a clearance hole suitable for the front end of the sensing line positioning outer sleeve 7 to pass through, and the rear end of the sensing line positioning outer sleeve 7 is provided with a stopper 17, and the diameter of the stopper 17 is larger than the diameter of the clearance hole.

[0043] For details, please refer to Figures 1 to 7 The front end of the outer sleeve 5 is provided with an outer sleeve end cover 16, and the outer sleeve end cover 16 is detachable. The end cover of the outer sleeve 5 limits the inner sliding cylinder 4 to prevent the inner sliding cylinder 4 from passing through the front end of the outer sleeve 5. The outer sleeve end cover 16 is provided with a clearance hole, and the front end of the sensing line positioning outer cylinder 7 passes through the clearance hole. The rear end of the sensing line positioning outer cylinder 7 is provided with a stopper 17, and the diameter of the stopper 17 is larger than the diameter of the clearance hole, that is, the stopper 17 cannot pass through the clearance hole, limiting the sensing line positioning outer cylinder 7 to prevent the sensing line positioning outer cylinder 7 from passing through the front end of the outer sleeve end cover 16, thereby increasing the stability of the device.

[0044] For further information, please refer to Figures 1 to 7 A positioning rotary block 18 is provided at the rear end of the outer tube end cover 16. The positioning rotary block 18 is provided in the inner cavity of the outer tube end cover 16 and is threadedly connected to the inner wall of the outer tube end cover 16. The front end surface of the positioning rotary block 18 is pressed against the rear end surface of the intramedullary nail locking inner tube 6 to limit the intramedullary nail locking inner tube 6, thereby preventing the intramedullary nail locking inner tube 6 from falling off from the front end of the outer tube end cover 16 and increasing the stability of the device.

[0045] As a specific embodiment of the intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7, the rear end of the outer cylinder end cap 16 covers the front end of the outer sleeve 5. A limiting stop post 19 is provided on the inner side wall at the rear end of the outer cylinder end cap 16, and a limiting stop groove is provided on the side wall at the front end of the outer sleeve 5. The limiting stop groove includes an axial groove 20 and a circumferential groove 21. The axial groove 20 is arranged along the axis of the outer sleeve 5, and the circumferential groove 21 is arranged at one end of the axial groove 20 away from the front end of the outer sleeve 5. The circumferential groove 21 is arranged along the circumferential direction of the outer sleeve 5. The limiting stop post 19 slides into the circumferential groove 21 along the axial groove 20 to fix the outer cylinder end cap 16 to the front end of the outer sleeve 5.

[0046] Specifically, please refer to Figures 1 to 7 , the outer cylinder end cap 16 covers the front end of the outer sleeve 5. The outer cylinder end cap 16 is detachably connected to the outer sleeve 5, which is convenient for the installation and disassembly of the inner sliding cylinder 4. A limiting stop post 19 is provided on the inner wall of the outer cylinder end cap 16. The limiting stop post 19 is a cylinder, and two groups of limiting stop posts 19 are symmetrically arranged. A limiting stop groove is provided on the side wall of the outer sleeve 5. The limiting stop block 17 can slide in the limiting groove. The limiting stop groove includes an axial groove 20 and a circumferential groove 21. The axial groove 20 extends from the front end to the rear end of the outer sleeve 5. The circumferential groove 21 is arranged at one end of the axial groove 20 away from the front end of the outer sleeve 5. The circumferential groove 21 is arranged in the circumferential direction of the outer sleeve 5. A blocking groove 22 is provided at one end of the circumferential groove 21 away from the axial groove 20. The blocking groove 22 is a circular groove and faces the front end of the outer sleeve 5. Two spring grooves are provided on the end face at the front end of the outer sleeve 5 outside the circumferential groove 21. A top spring 24 is arranged in the spring groove. The rear end of the top spring 24 abuts against the bottom of the spring groove, and the front end can abut against the inner wall of the outer cylinder end cap 16. When installing the outer cylinder end cap 16, the limiting stop post 19 slides into the axial groove 20 and slides to the bottom of the axial groove 20. Rotate the outer cylinder end cap 16 cover, and the limiting stop slides along the circumferential groove 21 into the blocking groove 22. The top spring 24 abuts between the outer cylinder end cap 16 and the outer sleeve 5 to prevent the limiting stop from falling off from the gear groove, completing the installation of the outer cylinder end cap 16. When disassembling the outer cylinder end cap 16, press the outer cylinder end cap 16, the limiting stop block 17 enters the circumferential groove 21, and rotate it in the reverse direction to remove the outer cylinder end cap 16.

[0047] As a specific embodiment of an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7 , a holding assembly is further provided. The holding assembly includes an intramedullary nail locking outer cylinder 25 and a handle 26. The intramedullary nail locking outer cylinder 25 is sleeved on the outer peripheral side of the intramedullary nail locking inner cylinder 6. A limiting block 27 is provided at the front end of the intramedullary nail locking outer cylinder 25. The limiting block 27 is clamped in the anti-rotation groove at the rear end of the intramedullary nail 29 to limit the position of the intramedullary nail 29. The handle 26 is provided at the rear end of the intramedullary nail locking outer cylinder 25.

[0048] Specifically, please refer to Figures 1 to 7, the holding assembly includes an intramedullary nail locking outer cylinder 25 and a handle 26. The handle 26 is arranged on the side wall of the intramedullary nail locking outer cylinder 25. The intramedullary nail locking outer cylinder 25 is sleeved on the outside of the intramedullary nail locking inner cylinder 6. A limiting block 27 matching the anti-rotation groove at the rear end of the intramedullary nail 29 is arranged at the front end of the intramedullary nail locking outer cylinder 25 to prevent the rotation of the intramedullary nail 29. The arrangement of the handle 26 facilitates the holding of the device and, in cooperation with the intramedullary nail 29, facilitates the determination of the angle of the intramedullary nail 29 and the orientation of the sensor 3 to be placed.

[0049] As a specific embodiment of an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7 , weight reduction grooves 28 are respectively arranged on the side walls of the inner sliding cylinder 4 and the outer sleeve 5.

[0050] Specifically, please refer to Figures 1 to 7 , weight reduction grooves 28 are arranged on the side wall of the inner sliding cylinder 4, and weight reduction grooves 28 are arranged on the side wall of the outer sleeve 5. Multiple groups of weight reduction grooves 28 are arranged along the length directions of the inner sliding cylinder 4 and the outer sleeve 5, which helps to reduce the weight of the device and improve the convenience of use of the device.

[0051] As a method for using an intramedullary nail implantation navigation device provided by the present invention, please refer to Figures 1 to 7, the front end of the flexible sensing wire 2 penetrates into the inner sliding cylinder 4 from the rear end, the front end of the flexible sensing wire 2 penetrates out of the inner sliding cylinder 4, passes through the outer locking cylinder 9 for the sensing wire and the inner locking cylinder 8 for the sensing wire. The integrated chip 1 is located in the inner sliding cylinder 4. The flexible sensing wire 2 is provided with a length scale to determine the length of the flexible sensing wire 2 passing through. Rotate the inner locking cylinder 8 for the sensing wire into the outer locking cylinder 9 for the sensing wire to lock the length of the flexible sensing wire 2. Install the outer positioning cylinder 7 for the sensing wire and the positioning rotary block 18 on the outer cylinder end cover 16. The outer cylinder end cover 16 is installed at the front end of the outer sleeve 5 and is locked with the inner sliding cylinder 4. The flexible sensing wire 2 passes through the outer sleeve 5. The rear end of the inner sliding cylinder 4 is threadedly connected to the rotary cylinder 14 and is screwed into the outer sleeve 5. The flexible sensing wire 2 penetrates out of the inner locking cylinder 6 for the intramedullary nail. Press the outer locking cylinder 25 for the intramedullary nail against the tail end of the intramedullary nail 29. The front end of the inner locking cylinder 6 for the intramedullary nail is screwed into the rear end of the intramedullary nail 29. According to the orientation of the handle 26, determine the direction of the sensor 3. Pass the flexible sensing wire 2 into the inner locking cylinder 6 for the intramedullary nail until the front end of the outer positioning cylinder 7 for the sensing wire penetrates into the inner locking cylinder 6 for the intramedullary nail. Rotate the rotary cylinder 14 so that the inner sliding cylinder 4 moves forward until it cannot be rotated. At this time, the front positioning portion 13 of the inner locking cylinder 8 for the sensing wire enters the inner cavity formed by the positioning claw 12, applies an outwardly expanding force to the positioning claw 12, presses the positioning claw 12 tightly in the positioning groove, prevents the positioning claw 12 from falling off from the positioning groove, limits the moving distance of the flexible sensing wire 2, and limits the flexible sensing wire 2. At this time, the sensor 3 is placed at a specified position to cooperate with an external instrument. The signal of the sensor 3 is transmitted to the integrated chip 1. The integrated chip 1 receives and analyzes the signal. According to the set program, the position information of the screw hole 30 around the sensor 3 is obtained. Cooperate with the external instrument, receive the position information of the screw hole 30, cooperate with the sensor 3 to determine the position of the screw, and implant the screw.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intramedullary nail implantation navigation device, characterized in that, Comprising: A displacement adjustment component, the displacement adjustment component includes an inner sliding cylinder (4) and an outer sleeve (5) which are relatively slidably arranged, and the inner sliding cylinder (4) is arranged inside the outer sleeve (5); An intramedullary nail locking component, the intramedullary nail locking component includes an intramedullary nail locking inner cylinder (6) and a sensing wire positioning outer cylinder (7), the rear end of the sensing wire positioning outer cylinder (7) is arranged inside the front end of the outer sleeve (5), the front end of the sensing wire positioning outer cylinder (7) is arranged inside the rear end of the intramedullary nail locking inner cylinder (6), and the front end of the intramedullary nail locking inner cylinder (6) is threadedly connected to the rear end of the intramedullary nail (29); A sensing component, the sensing component includes an integrated chip (1) and a flexible sensing wire (2), the integrated chip (1) is arranged inside the inner sliding cylinder (4), the rear end of the flexible sensing wire (2) is connected to the integrated chip (1), the front end of the flexible sensing wire (2) is provided with a sensor (3) for positioning and navigation, and the flexible sensing wire (2) sequentially passes through the inner sliding cylinder (4), the sensing wire positioning outer cylinder (7) and the intramedullary nail locking inner cylinder (6) and extends into the inner cavity of the intramedullary nail (29); And A sensing wire locking component, the sensing wire locking component includes a sensing wire locking inner cylinder (8) and a sensing wire locking outer cylinder (9), the sensing wire locking outer cylinder (9) is fixedly installed at the front end of the inner sliding cylinder (4), the rear end of the sensing wire locking inner cylinder (8) is detachably arranged inside the sensing wire locking outer cylinder (9), the flexible sensing wire (2) passes through the sensing wire locking outer cylinder (9) and the sensing wire locking inner cylinder (8), the sensing wire locking inner cylinder (8) and the sensing wire locking outer cylinder (9) cooperate to lock the flexible sensing wire (2), a plurality of sensing wire limiting claw pieces (10) are arranged circumferentially at the rear end of the sensing wire locking inner cylinder (8), the outer diameter of the sensing wire limiting claw pieces (10) gradually decreases towards the free end, a sensing wire limiting groove is arranged at the rear end of the inner cavity of the sensing wire locking outer cylinder (9), the sensing wire limiting claw pieces (10) are located in the sensing wire limiting groove, the sensing wire locking outer cylinder (9) is threadedly connected to the sensing wire locking inner cylinder (8), and the sensing wire locking outer cylinder (9) applies a force to the sensing wire limiting claw pieces (10) by means of the side wall of the sensing wire limiting groove, so that the sensing wire limiting claw pieces (10) approach each other, thereby locking the flexible sensing wire (2), a positioning groove is arranged at the rear end of the intramedullary nail locking inner cylinder (6), a plurality of positioning claw pieces (12) are arranged circumferentially at the front end of the sensing wire positioning outer cylinder (7), the positioning claw pieces (12) are located inside the positioning groove, the shape of the inner wall of the positioning groove matches the outer side wall of the positioning claw pieces (12), and a positioning portion (13) is arranged at the front end of the sensing wire locking inner cylinder (8), and the positioning portion (13) passes through the inner cavity formed by the positioning claw pieces (12) and presses the positioning claw pieces (12) tightly in the positioning groove.

2. The intramedullary nail implantation navigation device according to claim 1, characterized in that, The diameter of the positioning portion (13) gradually decreases toward the free end, and the distance between the inner side walls of the positioning claw pieces (12) gradually decreases toward the free end.

3. The intramedullary nail implantation navigation device according to claim 1, characterized in that, A rotating cylinder (14) is also provided. The rotating cylinder is rotatably provided at the rear end of the outer cylinder (5). The rotating cylinder (14) is threadedly connected to the rear end of the inner sliding cylinder (4).

4. The intramedullary nail implantation navigation device according to claim 1, characterized in that, The front end of the outer sleeve (5) is detachably provided with an outer sleeve end cover (16), and the outer sleeve end cover (16) is provided with a clearance hole suitable for the front end of the sensing line positioning outer sleeve (7) to pass through. The rear end of the sensing line positioning outer sleeve (7) is provided with a stopper (17), and the diameter of the stopper (17) is larger than the diameter of the clearance hole.

5. The intramedullary nail implantation navigation device according to claim 4, characterized in that, The rear end cover of the outer cylinder end cover (16) is arranged at the front end of the outer cylinder (5), and a limit stop column (19) is arranged on the inner side wall of the rear end of the outer cylinder end cover (16). The side wall of the front end of the outer cylinder (5) is provided with a limit stop groove, and the limit stop groove includes an axial groove (20) and a circumferential groove (21). The axial groove (20) is arranged along the axial direction of the outer cylinder (5), and the circumferential groove (21) is arranged at one end of the axial groove (20) away from the front end of the outer cylinder (5). The circumferential groove (21) is arranged along the circumferential direction of the outer cylinder (5). The limit stop column (19) slides into the circumferential groove (21) along the axial groove (20) to fix the outer cylinder end cover (16) to the front end of the outer cylinder (5).

6. The intramedullary nail implantation navigation device according to claim 1, characterized in that, A holding assembly is also provided, the holding assembly comprising an intramedullary nail locking outer cylinder (25) and a handle (26), the intramedullary nail locking outer cylinder (25) being sleeved on the outer peripheral side of the intramedullary nail locking inner cylinder (6), a limiting block (27) being provided at the front end of the intramedullary nail locking outer cylinder (25), the limiting block (27) being clamped in the anti-rotation groove at the rear end of the intramedullary nail (29) to limit the position of the intramedullary nail (29), and the handle (26) being provided at the rear end of the intramedullary nail locking outer cylinder (25).

7. The intramedullary nail implantation navigation device according to claim 1, characterized in that, The inner sliding cylinder (4) and the outer sleeve (5) are respectively provided with weight-reducing grooves (28) on their side walls.

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