Tibia alignment tool under navigation system

Abstract

The utility model relates to the technical field of medical instruments, in particular to a tibia alignment tool under a navigation system, which comprises an intramedullary positioning rod, one end of the intramedullary positioning rod is connected with a tibia in a pluggable manner, and an intramedullary positioning frame component is mounted on one side of the tibia and positioned on the outer wall of the intramedullary positioning rod. According to the tibia osteotomy guider, the angle limiting hole and the eccentric knob are arranged in the intramedullary positioning frame assembly, the angle position of the intramedullary positioning frame assembly is adjusted only by inserting the eccentric knob into the angle limiting hole for fixing, the locking shaft can be rotated by screwing the handle, and the position of the tibia osteotomy guider is adjusted. The tibia osteotomy guider can be better attached to the outer wall of the tibia for accurate positioning, one end of the button block compresses the spring to move, meanwhile, the other end of the button block is warped, then the button block and the transverse Morse taper hole are disconnected, the transfer rod body can be flexibly replaced and detached, installation is more convenient, and positioning is accurate.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a tibial alignment tool for a navigation system. Background Technology

[0002] During surgery, due to the large number of instruments involved and the complexity of their installation steps, surgical personnel often find it difficult to maneuver small installation tools flexibly when changing instruments. This not only increases the difficulty of installation but also frequently leads to instruments slipping while wearing gloves. This can result in instrument contamination or render the instruments unusable, further impacting the surgical procedure and efficiency. Therefore, optimizing instrument design and improving preoperative preparation procedures are crucial for better installation of various surgical instruments, and for precisely adjusting tibial alignment and tibial posterior tilt angle in knee replacement surgery.

[0003] Therefore, a tibial alignment tool for navigation systems is needed to improve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a tibial alignment tool for a navigation system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A tibial alignment tool for a navigation system includes an intramedullary positioning rod, one end of which is inserted and connected to the tibia. An intramedullary positioning frame assembly is installed on one side of the tibia and on the outer wall of the intramedullary positioning rod. A tibial osteotomy guide assembly is provided on the outer wall of the intramedullary positioning frame assembly. An optical tracking assembly is installed at one end of the intramedullary positioning frame assembly.

[0007] The intramedullary positioning frame assembly includes a bushing, which is fitted onto the outer wall of the intramedullary positioning rod for fixation. A crossbar is installed on the outer wall of the bushing via an eccentric knob. An angle limiting hole is provided on one side of the eccentric knob and on the outer wall of the crossbar. A longitudinal Morse taper hole and a transverse Morse taper hole are respectively provided on the outer wall of the crossbar.

[0008] As a preferred embodiment of this utility model, the optical tracking component includes a longitudinal Morse taper. An adapter rod body is installed on the inner wall of the longitudinal Morse taper hole, and a spring hole is provided on the outer wall of the adapter rod body. A spring is provided on the inner wall of the spring hole. A rotating shaft is rotatably connected to the inner wall of the adapter rod body opposite to it, and a button block is installed on the outer wall of the rotating shaft. One end of the button block is connected to the outer wall of the spring, and the other end of the button block is inserted and removed to the inner wall of the transverse Morse taper hole for fixation.

[0009] As a preferred embodiment of this utility model, an adapter rod is installed on the outer wall of the adapter rod body. The outer wall of the adapter rod is respectively provided with a flat round positioning post and a round positioning post. A threaded hole is opened on the outer wall of the flat round positioning post. A set screw is threadedly connected to the inner wall of the threaded hole. A passive optical tracking bracket is provided on the outer wall of the set screw. A round positioning hole is opened on the outer wall of the passive optical tracking bracket.

[0010] As a preferred embodiment of this utility model, the circular positioning hole and the circular positioning post are connected by a plug-in connection. A flat circular positioning hole is provided on one side of the set screw and on the outer wall of the passive optical tracking bracket. A flat circular positioning post is plugged into the inner wall of the flat circular positioning hole. The tracking bracket body is embedded in the outer wall of the passive optical tracking bracket, and a reflective ball is installed at the port of the tracking bracket body.

[0011] As a preferred embodiment of this utility model, the tibial osteotomy guide assembly includes a vertical rod, which is installed at the bottom of a horizontal rod. A top bead is installed on one side of the horizontal rod and on the outer wall of the vertical rod. The vertical rod is inserted into the horizontal rod and fixed by the top bead. A fixing rod is installed on the outer wall of the vertical rod and is fixed to the outer wall of the vertical rod by a locking button.

[0012] As a preferred embodiment of this utility model, a locking shaft is inserted and installed on the outer wall of the fixing rod, wherein a handle is installed at one end of the locking shaft and a stop pin is installed at the other end of the locking shaft, and a tibial osteotomy guide is installed on one side of the stop pin and on the outer wall of the locking shaft, and the tibial osteotomy guide is attached to the outer wall of the tibia.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In this invention, the tibial osteotomy guide component in the tibial alignment tool under the navigation system, and the angle limiting hole and eccentric knob in the intramedullary positioning frame component, only require adjusting the eccentric knob to insert into the angle limiting hole for fixation, thereby adjusting the angle position of the intramedullary positioning frame component. Turning the handle rotates the locking shaft, thereby adjusting the position of the tibial osteotomy guide, allowing the tibial osteotomy guide to better fit against the outer wall of the tibia for precise positioning. One end of the button block compresses the spring and displaces, while the other end of the button block tilts up, thereby disconnecting the button block from the transverse Morse taper hole, allowing for flexible replacement and disassembly of the adapter rod body. Installation is more convenient and positioning is more accurate, thus helping to solve the problems of optimizing instrument design and improving preoperative preparation procedures for better installation of various surgical instruments and tools, and how to accurately adjust the tibial alignment and tibial posterior tilt angle in knee replacement surgery. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of the adapter rod of this utility model;

[0017] Figure 3 This is a schematic diagram of the crossbar structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the tibial osteotomy guide assembly of this utility model;

[0019] Figure 5 This is a schematic diagram of the intramedullary positioning frame assembly of this utility model;

[0020] Figure 6 This is a schematic diagram of the main structure of the adapter rod of this utility model.

[0021] In the diagram: 1. Intramedullary positioning rod; 2. Tibia; 3. Intramedullary positioning frame assembly; 301. Bushing; 302. Eccentric knob; 303. Horizontal bar; 304. Angle limiting hole; 305. Longitudinal Morse taper hole; 306. Transverse Morse taper hole; 4. Tibial osteotomy guide assembly; 401. Vertical bar; 402. Top bead; 403. Fixing rod; 404. Locking button; 405. Locking shaft; 406. Handle; 407. Stop pin; 408. Tibial osteotomy guide; 5. 501. Optical tracking assembly; 502. Longitudinal Morse taper; 503. Adapter rod body; 504. Spring hole; 505. Spring; 506. Rotating shaft; 507. Button block; 508. Adapter rod; 509. With flat round positioning post; 510. Round positioning post; 511. Threaded hole; 512. Set screw; 513. Passive optical tracking bracket; 514. Round positioning hole; 515. With flat round positioning hole; 516. Tracking bracket body; 517. Reflector ball. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] For examples, please refer to Figure 1-6 This utility model provides a technical solution:

[0024] A tibial alignment tool for a navigation system includes an intramedullary positioning rod 1, one end of which is inserted and connected to a tibia 2, an intramedullary positioning frame assembly 3 is installed on one side of the tibia 2 and on the outer wall of the intramedullary positioning rod 1, a tibial osteotomy guide assembly 4 is provided on the outer wall of the intramedullary positioning frame assembly 3, and an optical tracking assembly 5 is installed at one end of the intramedullary positioning frame assembly 3.

[0025] In this embodiment, please refer to Figure 1 and Figure 5 The intramedullary positioning frame assembly 3 includes a bushing 301, which is fitted onto the outer wall of the intramedullary positioning rod 1 for fixation. A crossbar 303 is installed on the outer wall of the bushing 301 via an eccentric knob 302. An angle limiting hole 304 is provided on one side of the eccentric knob 302 and on the outer wall of the crossbar 303. A longitudinal Morse taper hole 305 and a transverse Morse taper hole 306 are respectively provided on the outer wall of the crossbar 303.

[0026] In this embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 The optical tracking component 5 includes a longitudinal Morse taper 501. A converter rod body 502 is installed on the inner wall of the longitudinal Morse taper hole 305, inserted into the longitudinal Morse taper 501. A spring hole 503 is provided on the outer wall of the converter rod body 502, and a spring 504 is provided on the inner wall of the spring hole 503. A rotating shaft 505 is rotatably connected to the opposing inner walls of the converter rod body 502, and a button block 506 is installed on the outer wall of the rotating shaft 505. One end of the button block 506 is connected to the outer wall of the spring 504, and the other end of the button block 506 is inserted and removed into the inner wall of the transverse Morse taper hole 306 for fixation. A converter rod 507 is installed on the outer wall of the converter rod body 502, and a flat round positioning post 508 and a round positioning post 509 are respectively provided on the outer wall of the converter rod 507. A threaded hole 510 is provided on the outer wall of the flat-round positioning post 508. A set screw 511 is threadedly connected to the inner wall of the threaded hole 510. A passive optical tracking bracket 512 is provided on the outer wall of the set screw 511. A circular positioning hole 513 is provided on the outer wall of the passive optical tracking bracket 512. The circular positioning hole 513 and the circular positioning post 509 are connected by a plug-in connection. A flat-round positioning hole 514 is provided on one side of the set screw 511 and on the outer wall of the passive optical tracking bracket 512. A flat-round positioning post 508 is plugged into the inner wall of the flat-round positioning hole 514. A tracking bracket body 515 is embedded in the outer wall of the passive optical tracking bracket 512. A reflector ball 516 is installed at the port of the tracking bracket body 515.

[0027] In this embodiment, please refer to Figure 1 , Figure 4 and Figure 5The tibial osteotomy guide assembly 4 includes a vertical rod 401, which is installed at the bottom of a horizontal rod 303. A top bead 402 is installed on one side of the horizontal rod 303 and on the outer wall of the vertical rod 401. The vertical rod 401 is inserted into the horizontal rod 303 and fixed by the top bead 402. A fixing rod 403 is installed on the outer wall of the vertical rod 401 and is fixed to the outer wall of the vertical rod 401 by a locking button 404. A locking shaft 405 is inserted and removed from the outer wall of the fixing rod 403. A handle 406 is installed at one end of the locking shaft 405 and a stop pin 407 is installed at the other end of the locking shaft 405. A tibial osteotomy guide 408 is installed on one side of the stop pin 407 and on the outer wall of the locking shaft 405. The tibial osteotomy guide 408 fits against the outer wall of the tibia 2.

[0028] The working process of this utility model is as follows: When using the tibial alignment tool under the navigation system designed in this scheme, the tibia 2 is inserted and connected to one end of the intramedullary positioning rod 1. An intramedullary positioning frame assembly 3 is installed on one side of the tibia 2 and on the outer wall of the intramedullary positioning rod 1. A tibial osteotomy guide assembly 4 is provided on the outer wall of the intramedullary positioning frame assembly 3. Under the action of the optical tracking assembly 5 installed at one end of the intramedullary positioning frame assembly 3, the angle limiting hole 304 and the eccentric knob 302 in the intramedullary positioning frame assembly 3 only need to be adjusted to insert the eccentric knob 302 into the angle limiting hole 304 for fixation, thereby adjusting the angle position of the intramedullary positioning frame assembly 3. At the same time, the angle position of the intramedullary positioning frame assembly 3 is adjusted by fixing the rod 4. 03 The locking button 404 is fixed to the outer wall of the vertical rod 401. The locking shaft 405 is inserted and installed on the outer wall of the fixing rod 403. One end of the locking shaft 405 is equipped with a handle 406, and the other end of the locking shaft 405 is equipped with a stop pin 407. A tibial osteotomy guide 408 is installed on one side of the stop pin 407 and on the outer wall of the locking shaft 405. With the tibial osteotomy guide 408 fitting against the outer wall of the tibia 2, the locking shaft 405 can be rotated by simply turning the handle 406, thereby adjusting the position of the tibial osteotomy guide 408 so that the tibial osteotomy guide 408 fits better against the outer wall of the tibia 2 for precise positioning.

[0029] Meanwhile, an adapter rod body 502 is installed on the inner wall of the longitudinal Morse taper 501 inserted into the longitudinal Morse taper hole 305. A spring hole 503 is opened on the outer wall of the adapter rod body 502, and a spring 504 is provided on the inner wall of the spring hole 503. A rotating shaft 505 is rotatably connected to the opposing inner wall of the adapter rod body 502, and a button block 506 is installed on the outer wall of the rotating shaft 505. One end of the button block 506 is connected to the outer wall of the spring 504, and the other end of the button block 506 is inserted and pulled into the inner wall of the transverse Morse taper hole 306 for fixation. When disassembly is required, simply press the button block 506 to make the button block 506 detach. One end of the compression spring 504 of the 06 is displaced, while the other end of the button block 506 is raised, thereby disconnecting the button block 506 from the transverse Morse taper hole 306. This allows for flexible replacement and disassembly of the adapter rod body 502. Simply release the button block 506, and the compressed spring 504 will extend, pushing the button block 506 back to its original position. This makes installation more convenient and precise, thus helping to solve the problems of optimizing instrument design and improving preoperative preparation procedures for better installation of various surgical instruments and tools, as well as how to accurately adjust the tibial alignment and tibial posterior tilt angle in knee replacement surgery.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tibial alignment tool for a navigation system, comprising an intramedullary positioning rod (1), characterized in that: One end of the intramedullary positioning rod (1) is inserted and connected to the tibia (2). An intramedullary positioning frame assembly (3) is installed on one side of the tibia (2) and on the outer wall of the intramedullary positioning rod (1). A tibial osteotomy guide assembly (4) is provided on the outer wall of the intramedullary positioning frame assembly (3). An optical tracking assembly (5) is installed at one end of the intramedullary positioning frame assembly (3). The intramedullary positioning frame assembly (3) includes a bushing (301), which is fitted onto the outer wall of the intramedullary positioning rod (1) for fixation. A crossbar (303) is installed on the outer wall of the bushing (301) via an eccentric knob (302). An angle limiting hole (304) is provided on one side of the eccentric knob (302) and on the outer wall of the crossbar (303). A longitudinal Morse taper hole (305) and a transverse Morse taper hole (306) are respectively provided on the outer wall of the crossbar (303).

2. The tibia alignment tool in a navigation system according to claim 1, characterized in that: The optical tracking component (5) includes a longitudinal Morse taper (501). The longitudinal Morse taper (501) is inserted into the inner wall of the longitudinal Morse taper hole (305) and a converter rod body (502) is installed. A spring hole (503) is opened on the outer wall of the converter rod body (502). A spring (504) is provided on the inner wall of the spring hole (503). A rotating shaft (505) is rotatably connected to the inner wall opposite to the converter rod body (502). A button block (506) is installed on the outer wall of the rotating shaft (505). One end of the button block (506) is connected to the outer wall of the spring (504), and the other end of the button block (506) is inserted and pulled into the inner wall of the transverse Morse taper hole (306) for fixation.

3. The tibia alignment tool in a navigation system according to claim 2, characterized in that: An adapter rod (507) is installed on the outer wall of the adapter rod body (502). The outer wall of the adapter rod (507) is provided with a flat round positioning post (508) and a round positioning post (509). A threaded hole (510) is opened on the outer wall of the flat round positioning post (508). A set screw (511) is threaded on the inner wall of the threaded hole (510). A passive optical tracking bracket (512) is provided on the outer wall of the set screw (511). A round positioning hole (513) is opened on the outer wall of the passive optical tracking bracket (512).

4. The tibia alignment tool in a navigation system according to claim 3, characterized in that: The circular positioning hole (513) and the circular positioning post (509) are connected by a plug-in connection. A flat circular positioning hole (514) is provided on one side of the set screw (511) and on the outer wall of the passive optical tracking bracket (512). A flat circular positioning post (508) is plugged into the inner wall of the flat circular positioning hole (514). A tracking bracket body (515) is embedded in the outer wall of the passive optical tracking bracket (512). A reflector ball (516) is installed at the port of the tracking bracket body (515).

5. The tibia alignment tool in a navigation system according to claim 1, characterized in that: The tibial osteotomy guide assembly (4) includes a vertical rod (401) which is installed at the bottom of a horizontal rod (303). A top bead (402) is installed on one side of the horizontal rod (303) and on the outer wall of the vertical rod (401). The vertical rod (401) is inserted into the horizontal rod (303) and fixed by the top bead (402). A fixing rod (403) is installed on the outer wall of the vertical rod (401) and the fixing rod (403) is fixed to the outer wall of the vertical rod (401) by a locking button (404).

6. The tibia alignment tool in a navigation system according to claim 5, characterized in that: A locking shaft (405) is inserted and installed on the outer wall of the fixing rod (403). A handle (406) is installed at one end of the locking shaft (405), and a stop pin (407) is installed at the other end of the locking shaft (405). A tibial osteotomy guide (408) is installed on one side of the stop pin (407) and on the outer wall of the locking shaft (405). The tibial osteotomy guide (408) is attached to the outer wall of the tibia (2).

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