Orthopedic surgery navigation reference frame fixation device

Abstract

The utility model relates to medical instrument technical field, and disclose a kind of orthopedics surgery navigation reference frame fixing device, including navigation reference frame body and the fixed frame for supporting navigation reference frame body, the fixed frame includes fixed seat, the bottom of fixed seat is provided with several Kirschner wires, the top of fixed seat is fixedly installed with first stand, the top of first stand is provided with second stand. The utility model, when connecting Kirschner wire and patient's skeleton, first stand and second stand can be separated in advance, then fixed seat is inserted with Kirschner wire and connects action, after insertion and fixation, by rectangular column insertion rectangular sleeve inside and limit, and the firmness of connection is enhanced using the magnetic force between strong magnet and iron sheet, it is convenient to improve the stability when using navigation reference frame body subsequently, since it has the advantages of convenient to take, small volume when installing Kirschner wire, reduce the operation difficulty, to facilitate the accurate installation of Kirschner wire.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically to a fixation device for an orthopedic surgical navigation reference frame. Background Technology

[0002] Orthopedic surgery typically involves acquiring images of the affected area before or during the procedure, followed by intraoperative registration to enable image-guided surgery. Commonly used image-guided modes include 2D fluoroscopic guidance and CT guidance. Orthopedic surgical navigation uses a reference frame to track patient displacement or changes in bone structure. The navigation reference frame is usually securely fixed to the surgical bone structure to reflect its position in real time, allowing the navigation system to guide the surgical procedure. The navigation reference frame is generally fixed by clamping it directly to the adjacent bone structure.

[0003] A search revealed an existing patent (application number: 202020584584.2) that discloses a reference frame fixation device for orthopedic surgical navigation. This device has a fixing seat connected to the lower end of a connecting rod, with Kirschner wires connected to the bottom of the fixing seat. The navigation reference frame can be fixed by inserting the Kirschner wires into the bone near the affected area, eliminating the need for pre-opening near the affected area and clamping the bone with metal clips. This reduces patient pain and recovery time, and provides a secure fixation, preventing positional displacement. The patent also proposes a bent connecting rod, allowing for greater operating space during surgery and preventing the connecting rod from interfering with the surgeon's work. Furthermore, it proposes that the connecting frame and mounting ring are fixed by a threaded rod. By adjusting the threaded rod, the compressive force between the mounting ring and the reference frame can be controlled, allowing for arbitrary adjustment of the positions of the connecting frame and the reference frame. This enables the tracer ball on the reference frame to more accurately reflect the location information of the affected area. However, in the process of realizing this utility model, the inventors discovered the following problems with the prior art: The above-mentioned fixing device uses Kirschner wires inserted into the patient's bone to achieve the purpose of positioning the whole device. Since the Kirschner wires are fixedly installed with the whole device and cannot be disassembled and separated separately, when inserting the Kirschner wires into the patient's bone, the other structures will hinder the insertion action, making it difficult to smoothly and accurately insert the Kirschner wires into the appropriate position of the patient's bone.

[0004] In view of this, the present invention proposes a reference frame fixing device for orthopedic surgical navigation that is easy to operate and install in order to solve this problem. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an orthopedic surgical navigation reference frame fixation device to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: an orthopedic surgical navigation reference frame fixing device, including a navigation reference frame body and a fixing frame for supporting the navigation reference frame body. The fixing frame includes a fixing seat, a plurality of Kirschner wires are provided at the bottom end of the fixing seat, a first column is fixedly installed at the top of the fixing seat, a second column is provided at the top of the first column, an installation sleeve is provided at the top of the second column, an extension arm is provided at the top of the installation sleeve, the extension arm is bent, a shaft is fixedly installed at the top of the extension arm, a connecting frame is provided on the surface of the shaft, and the connecting frame is fixed to the bottom end of the navigation reference frame body.

[0007] The first column and the second column are detachably installed. A rectangular insert is fixedly installed on the top of the first column, and a rectangular sleeve is fixedly installed on the bottom of the second column. The rectangular insert is inserted into the rectangular groove reserved at the bottom of the rectangular sleeve, and a strong magnet is embedded in the top of the rectangular sleeve. An iron sheet is embedded in the top of the rectangular insert, and the iron sheet is magnetically attracted to the strong magnet.

[0008] Furthermore, the second column is rotatably connected to the mounting sleeve, the inner wall of the mounting sleeve is provided with a transmission cavity, a knob is rotatably connected to the surface of the mounting sleeve, the rod of the knob extends into the interior of the transmission cavity and a worm gear is fixedly installed thereon, and a worm wheel is fixedly installed inside the second column in the transmission cavity, with the worm gear meshing with the worm wheel.

[0009] As a further description of the above technical solution: by rotating the second column and the mounting sleeve, and by rotating the knob, the position of the navigation reference frame body can be horizontally rotated and adjusted based on the meshing of the worm and the worm wheel, thereby improving the flexibility of the device and reducing the difficulty of installing the Kirschner wire.

[0010] Furthermore, the top of the mounting sleeve is provided with a rectangular telescopic groove, the extension arm is inserted into the rectangular telescopic groove, the surface of the mounting sleeve is threaded with a threaded set screw, and the surface of the extension arm is provided with a plurality of first positioning holes at equal intervals, the threaded set screw and the first positioning hole are positioned corresponding to each other.

[0011] As a further description of the above technical solution: by inserting the extension arm into the rectangular telescopic groove at the top of the mounting sleeve, and using the threaded set screw to engage with the first positioning hole at different heights, the height of the navigation reference frame body can be adjusted, thereby enhancing the flexibility and adjustability of the device.

[0012] Furthermore, the fixing base, the first column, and the Kirschner wire are all made of 304 medical-grade stainless steel.

[0013] As a further description of the above technical solution: by setting the material to stainless steel, it is not easy for the instruments to cause infection due to rust.

[0014] Furthermore, the connecting frame and the shaft are rotatably connected, and an angle adjustment assembly is provided between the connecting frame and the extension arm. The angle adjustment assembly includes a positioning screw threaded to the surface of the connecting frame. The surface of the extension arm is provided with a plurality of second positioning holes equidistantly arranged in a circular array with the central axis of the shaft as the axis. The threaded end of the positioning screw is engaged inside the second positioning hole.

[0015] As a further description of the above technical solution: by setting an angle adjustment component and using a positioning screw to engage with the second positioning hole at different positions, the tilt angle of the navigation reference frame body can be adjusted, further improving the flexibility of the device.

[0016] Furthermore, the surface of the extension arm is provided with angle scale lines corresponding to the second positioning hole, and the surface of the connecting frame is provided with a pointer, the position of which corresponds to the angle scale lines.

[0017] As a further description of the above technical solution: by setting pointers and angle scale lines, the angle adjusted by the navigation reference frame body can be accurately marked.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] 1. Compared with existing technologies, this orthopedic surgical navigation reference frame fixation device uses Kirschner wires inserted into the bone near the patient's affected area to achieve a firm positioning of the entire device. After positioning, the navigation reference frame body is used. When connecting the Kirschner wires to the patient's bone, the first and second posts can be separated in advance, and then the fixation base and Kirschner wires are inserted and connected. After insertion and fixation, the rectangular insert is inserted into the rectangular sleeve for limiting, and the magnetic force between the strong magnet and the iron plate is used to enhance the firmness of the connection, which facilitates the stability of the navigation reference frame body during subsequent use. Due to the advantages of easy handling and small size during Kirschner wire installation, the operation difficulty is reduced, thus facilitating the accurate installation of Kirschner wires.

[0020] 2. Compared with existing technologies, this orthopedic surgical navigation reference frame fixing device, through the rotatable connection between the second column and the mounting sleeve, allows for horizontal rotation adjustment of the navigation reference frame body by rotating a knob, based on the meshing of the worm gear and worm wheel. This improves the device's usability and reduces the difficulty of Kirschner wire installation. The extension arm, inserted into the rectangular telescopic groove at the top of the mounting sleeve, and secured with a threaded set screw into the first positioning holes at different heights, allows for height adjustment of the navigation reference frame body, enhancing its flexibility and adjustability. An angle adjustment component, using a positioning screw engaged in the second positioning holes at different positions, allows for tilt adjustment of the navigation reference frame body, further improving usability. A pointer and angle scale accurately indicate the adjusted angle of the navigation reference frame body. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention from one perspective;

[0022] Figure 2 This is a two-dimensional structural schematic diagram of the present invention from a different perspective;

[0023] Figure 3 This is a cross-sectional view of the installation sleeve of this utility model;

[0024] Figure 4 This is a cross-sectional structural diagram of the connecting frame of this utility model.

[0025] The attached diagram is labeled as follows: 1. Navigation reference frame body; 2. Fixing base; 3. Kirschner wire; 4. First column; 5. Second column; 6. Mounting sleeve; 7. Extension arm; 8. Shaft; 9. Connecting frame; 10. Rectangular insert; 11. Rectangular sleeve; 12. Strong magnet; 13. Iron sheet; 14. Knob; 15. Worm gear; 16. Worm wheel; 17. Threaded set screw; 18. First positioning hole; 19. Positioning screw; 20. Second positioning hole; 21. Angle scale line; 22. Pointer. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The orthopedic surgical navigation reference frame fixation device involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Reference Figures 1 to 4This utility model provides a fixation device for an orthopedic surgical navigation reference frame, including a navigation reference frame body 1 and a fixing frame for supporting the navigation reference frame body 1. The fixing frame includes a fixing seat 2, a plurality of Kirschner wires 3 are provided at the bottom end of the fixing seat 2, a first column 4 is fixedly installed at the top of the fixing seat 2, a second column 5 is provided at the top end of the first column 4, a mounting sleeve 6 is provided at the top end of the second column 5, an extension arm 7 is provided at the top end of the mounting sleeve 6, the extension arm 7 is bent, a shaft 8 is fixedly installed at the top end of the extension arm 7, a connecting frame 9 is provided on the surface of the shaft 8, and the connecting frame 9 is fixed to the bottom end of the navigation reference frame body 1.

[0028] When using this orthopedic surgical navigation reference frame fixation device, Kirschner wires 3 are inserted into the bone near the patient's affected area to achieve the purpose of firmly positioning the entire device. After positioning, medical staff use the navigation reference frame body 1 from the outside.

[0029] The first column 4 and the second column 5 are detachably installed. A rectangular insert 10 is fixedly installed on the top of the first column 4, and a rectangular sleeve 11 is fixedly installed on the bottom of the second column 5. The rectangular insert 10 is inserted into the rectangular groove reserved at the bottom of the rectangular sleeve 11, and a strong magnet 12 is embedded in the top of the inner side of the rectangular sleeve 11. An iron sheet 13 is embedded in the top of the rectangular insert 10, and the iron sheet 13 and the strong magnet 12 are magnetically attracted to each other.

[0030] It is worth noting that when connecting the Kirschner wire 3 to the patient's bone, the first post 4 and the second post 5 can be separated in advance. Then, the fixing base 2 and the Kirschner wire 3 are inserted and connected. After insertion and fixing, the rectangular insert 10 is inserted into the rectangular sleeve 11 for limiting. The magnetic force between the strong magnet 12 and the iron plate 13 is used to enhance the firmness of the connection, which facilitates the improvement of the stability when using the navigation reference frame body 1. Since the Kirschner wire 3 is easy to handle and has a small size, the operation difficulty is reduced, thus facilitating the accurate installation of the Kirschner wire 3.

[0031] The fixing base 2, the first column 4 and the Kirschner wire 3 are all made of 304 medical stainless steel.

[0032] By using stainless steel as the material, it is less likely to cause infection due to rust on the equipment.

[0033] The second column 5 is rotatably connected to the mounting sleeve 6. The inner wall of the mounting sleeve 6 is provided with a transmission cavity. A knob 14 is rotatably connected to the surface of the mounting sleeve 6. The rod of the knob 14 extends into the interior of the transmission cavity and a worm gear 15 is fixedly installed thereon. A worm wheel 16 is fixedly installed inside the transmission cavity of the second column 5. The worm gear 15 and the worm wheel 16 mesh with each other.

[0034] It is worth noting that by rotating the second column 5 and the mounting sleeve 6, and by rotating the knob 14, the position of the navigation reference frame body 1 can be horizontally rotated and adjusted based on the meshing of the worm gear 15 and the worm wheel 16. This can improve the flexibility of the device and further reduce the difficulty of installing the Kirschner wire 3.

[0035] The top of the mounting sleeve 6 has a rectangular telescopic groove, and the extension arm 7 is inserted inside the rectangular telescopic groove.

[0036] The surface of the mounting sleeve 6 is threaded with a threaded set screw 17, and the surface of the extension arm 7 is provided with a number of first positioning holes 18 at equal intervals, with the threaded set screw 17 corresponding to the position of the first positioning hole 18.

[0037] It is worth noting that by inserting the extension arm 7 into the rectangular telescopic groove at the top of the mounting sleeve 6 and using the threaded set screw 17 to engage with the first positioning hole 18 at different heights, the height of the navigation reference frame body 1 can be adjusted, thereby enhancing the flexibility and adjustability of the device.

[0038] The connecting frame 9 and the shaft 8 are rotatably connected, and an angle adjustment component is provided between the connecting frame 9 and the extension arm 7.

[0039] The angle adjustment assembly includes a positioning screw 19 threadedly connected to the surface of the connecting frame 9. The surface of the extension arm 7 is provided with a plurality of second positioning holes 20 equidistantly arranged in a circular array with the central axis of the shaft 8 as the axis. The threaded end of the positioning screw 19 is engaged inside the second positioning hole 20.

[0040] It is worth noting that by setting up an angle adjustment component and using the positioning screw 19 to engage with the second positioning hole 20 at different positions, the tilt angle of the navigation reference frame body 1 can be adjusted, further improving the flexibility of the device.

[0041] An angle scale line 21 is provided on the surface of the extension arm 7 corresponding to the second positioning hole 20, and a pointer 22 is provided on the surface of the connecting frame 9, with the pointer 22 corresponding to the position of the angle scale line 21.

[0042] Furthermore, by setting the pointer 22 and the angle scale line 21, the angle adjusted by the navigation reference frame body 1 can be accurately marked, improving the accuracy of adjustment.

[0043] Finally, it should be noted that the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A fixation device for an orthopedic surgical navigation reference frame, comprising a navigation reference frame body (1) and a fixation frame for supporting the navigation reference frame body (1), characterized in that: The fixing frame includes a fixing base (2), a plurality of Kirschner wires (3) are provided at the bottom end of the fixing base (2), a first column (4) is fixedly installed at the top of the fixing base (2), a second column (5) is provided at the top end of the first column (4), a mounting sleeve (6) is provided at the top end of the second column (5), an extension arm (7) is provided at the top end of the mounting sleeve (6), the extension arm (7) is bent, a shaft (8) is fixedly installed at the top end of the extension arm (7), a connecting frame (9) is provided on the surface of the shaft (8), and the connecting frame (9) is fixed to the bottom end of the navigation reference frame body (1); The first column (4) and the second column (5) are detachably installed. A rectangular insert (10) is fixedly installed on the top of the first column (4), and a rectangular sleeve (11) is fixedly installed on the bottom of the second column (5). The rectangular insert (10) is inserted into the rectangular groove reserved at the bottom of the rectangular sleeve (11), and a strong magnet (12) is embedded in the top of the inner side of the rectangular sleeve (11). An iron sheet (13) is embedded in the top of the rectangular insert (10), and the iron sheet (13) and the strong magnet (12) are magnetically attracted to each other.

2. The orthopedic surgical navigation reference frame fixation device according to claim 1, characterized in that: The second column (5) is rotatably connected to the mounting sleeve (6). The inner wall of the mounting sleeve (6) is provided with a transmission cavity. A knob (14) is rotatably connected to the surface of the mounting sleeve (6). The rod of the knob (14) extends into the interior of the transmission cavity and a worm (15) is fixedly installed thereon. A worm wheel (16) is fixedly installed inside the transmission cavity of the second column (5). The worm (15) and the worm wheel (16) mesh with each other.

3. The orthopedic surgical navigation reference frame fixation device according to claim 1, characterized in that: The top of the mounting sleeve (6) is provided with a rectangular telescopic groove, and the extension arm (7) is inserted inside the rectangular telescopic groove.

4. The orthopedic surgical navigation reference frame fixation device according to claim 3, characterized in that: The mounting sleeve (6) has a threaded set screw (17) on its surface, and the extension arm (7) has several first positioning holes (18) equidistantly opened on its surface, with the threaded set screw (17) and the first positioning hole (18) corresponding to each other.

5. The orthopedic surgical navigation reference frame fixation device according to claim 1, characterized in that: The fixing base (2), the first column (4) and the Kirschner wire (3) are all made of 304 medical stainless steel.

6. The orthopedic surgical navigation reference frame fixation device according to claim 1, characterized in that: The connecting frame (9) is rotatably connected to the shaft (8), and an angle adjustment component is provided between the connecting frame (9) and the extension arm (7).

7. The orthopedic surgical navigation reference frame fixation device according to claim 6, characterized in that: The angle adjustment assembly includes a positioning screw (19) threadedly connected to the surface of the connecting frame (9). The surface of the extension arm (7) is provided with a plurality of second positioning holes (20) equidistantly arranged in a circular array with the central axis of the shaft (8) as the axis. The threaded end of the positioning screw (19) is engaged inside the second positioning hole (20).

8. The orthopedic surgical navigation reference frame fixation device according to claim 7, characterized in that: The surface of the extension arm (7) is provided with an angle scale line (21) corresponding to the second positioning hole (20), and the surface of the connecting frame (9) is provided with a pointer (22), the pointer (22) and the angle scale line (21) are positioned corresponding to each other.

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