A three-dimensional navigation-based tibial dual-pin traction orthopedic system

Abstract

The application provides a tibia double-fixed-point traction orthopedic system based on three-dimensional navigation, and belongs to the technical field of medical instruments. The system comprises a first fixed plate, a second fixed plate and arc-shaped sliding grooves respectively formed on the middle outer wall, and the first fixed plate and the second fixed plate are respectively fixedly connected with second hinge rings at the end close to each other. An auxiliary assembly comprises a first base and a second base, and the two ends of the first base and the second base are fixedly connected with first hinge rings which are sleeved on the outer wall of a first threaded column. The first base and the second base are respectively provided with sliding columns with scales, the sliding columns are slidably connected with sliding seats, the sliding seats are provided with sliding tubes and guide round plates, and the sliding tubes and the guide round plates are used for guiding Kirschner wires. Through the setting of the auxiliary assembly, the Kirschner wire can be guided during the wire placement process, the operation efficiency of medical staff is improved, the needle path is ensured to be parallel, and a foundation is laid for the stability of the stress area in the subsequent orthopedic stage.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation. Background Technology

[0002] Tibial deformity correction and bone lengthening techniques are among the core technologies in orthopedic reconstructive surgery, widely used in various diseases causing tibial axis deviation or length abnormalities, including post-traumatic malunion, infected bone injuries, congenital malformations, bone defects, nonunion, and lower limb alignment abnormalities. To achieve precise control of tibial correction and lengthening, external fixation devices are primarily used clinically, with the circular external fixator system being a commonly used instrument.

[0003] In clinical applications, existing ring-shaped external fixators consist of a metal ring frame, connecting rods, adjusting screws, and multiple puncture steel needles or elastic needles. They can achieve multi-plane traction and force line correction of the tibia, and have significant clinical advantages in bone defect reconstruction, nonunion treatment, and functional traction. However, this type of ring-shaped external fixation system has obvious shortcomings: the placement of the guide needles is highly dependent on the clinical experience of medical staff. Once a puncture deviation occurs, it is difficult to establish a stable traction axis, which can easily cause instability of the force-bearing area during subsequent correction, leading to secondary injury to the patient. In addition, the correction adjustment process also depends on the subjective experience of medical staff, resulting in limited traction accuracy and a high rate of operational errors, which is not conducive to the patient's rehabilitation process. Therefore, this invention provides a tibial dual-fixation-point traction and correction system based on three-dimensional navigation to meet the needs. Summary of the Invention

[0004] This invention provides a tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation, which solves the problem that puncture deviation is easy to occur when medical staff insert the guide needle, which leads to instability of the force area during the orthopedic process and causes secondary injury to the patient. At the same time, it avoids the adverse effects of the subjective experience of medical staff on the traction accuracy.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation includes a first fixation plate and a second fixation plate. Arc-shaped sliding grooves are respectively formed on the outer walls of the middle portion of the first and second fixation plates. Second hinge rings are fixedly connected to the ends of the first and second fixation plates closest to each other. Third threaded posts are rotatably connected to the inner walls of the second hinge rings. Limiting circular grooves are formed on the outer walls of the ends of the first and second fixation plates away from the second hinge rings. First threaded posts are slidably connected to the inner walls of the limiting circular grooves. A plurality of second threaded posts are slidably connected to the inner walls of the arc-shaped sliding grooves. The first threaded post has a fixed block at one end away from the central axis of the first threaded post, and a fixing screw is screwed onto the outer wall of the middle part of the fixing block. The auxiliary assembly includes a first base and a second base, both ends of which are fixedly connected to a first hinge ring, which is sleeved on the outer wall of the first threaded post. The first and second bases are each provided with a graduated sliding post, and a sliding seat is slidably connected to each sliding post. The sliding seat has a sliding tube and a guide plate, which are used to guide the Kirschner wires.

[0007] Optionally, the first hinge ring is composed of two cylinders, and the distance between the two cylinders is adapted to the thickness of the first fixing plate and the second fixing plate. The first hinge ring is fixedly connected to the first fixing plate and the second fixing plate respectively through the first threaded post.

[0008] Optionally, a first arc-shaped plate is fixedly connected to the top outer wall of the first base, and a first support plate is fixedly connected to the end of the first arc-shaped plate away from the first base; a second arc-shaped plate is fixedly connected to the top outer wall of the second base, and a second support plate is fixedly connected to the end of the second arc-shaped plate away from the second base.

[0009] Optionally, a first rotating groove is formed on the outer wall of the first base away from the second base, and a plurality of first sliding columns are fixedly connected to the outer wall of the first base near the first rotating groove. A first rotating handle is rotatably connected to the inner wall of the first rotating groove, and a first sliding seat is screwed onto the outer wall of the first rotating handle.

[0010] Optionally, the first sliding seat is symmetrically fixedly connected to the two ends of the first baffle, the first sliding seat is provided with a first screw groove on the outer wall of the side near the first base, the first sliding seat is provided with a plurality of second sliding grooves on the outer wall near the first screw groove, and the first baffle is provided with a first sliding groove on the outer wall near the middle.

[0011] Optionally, a second screw groove is provided on the outer wall of the second base away from the first base, and a plurality of second sliding columns are fixedly connected to the outer wall of the second base near the first base. The outer walls of the first sliding column and the second sliding column are provided with scales. A second rotating handle is screwed onto the inner wall of the second screw groove, and a second sliding seat is rotatably connected to the end of the second rotating handle near the first base.

[0012] Optionally, a second rotating groove is provided on the outer wall of the second sliding seat near the second base, and a plurality of third sliding grooves are provided on the outer wall of the second sliding seat near the second rotating groove. Second baffles are symmetrically fixedly connected to both ends of the second sliding seat, and a fourth sliding groove is provided on the outer wall of the second baffle near the top.

[0013] Optionally, a sliding tube is slidably connected to the inner wall of the first sliding groove and the fourth sliding groove, a first limiting plate is fixedly connected to the outer wall of the sliding tube near the middle, a threaded tube is fixedly connected to the end of the sliding tube away from the central axis of the second sliding seat, and a rotating cylinder is screwed onto the outer wall of the threaded tube.

[0014] Optionally, a guide plate is fixedly connected to the end of the threaded tube away from the sliding tube, and an inclined surface is formed on the inner wall of the end of the guide plate away from the threaded tube. A second limiting plate is fixedly connected to the end of the sliding tube away from the threaded tube, and a spring is fixedly connected to the outer wall of the second limiting plate on the side away from the sliding tube.

[0015] Optionally, an abutment post is slidably connected to the outer wall of the end of the sliding tube away from the threaded tube. A cavity is formed inside the abutment post. A guide groove is formed on the inner wall of the cavity away from the second limiting plate. A rounded corner is provided on the inner wall of the guide groove away from the cavity.

[0016] The beneficial effects of the above-described technical solution of the present invention are as follows:

[0017] In the above-mentioned scheme, by setting up auxiliary components, not only can the patient's legs be raised during the operation to facilitate the insertion of Kirschner wires by medical staff, thereby improving the patient's comfort and compliance during the operation, but it can also provide guidance during the insertion of Kirschner wires, improving the efficiency of medical staff's operation, while ensuring the parallelism of the needle path, laying the foundation for the stability of the force-bearing area in the subsequent orthopedic stage; in addition, CT scan results can be used as a reference to avoid operational errors caused by limited traction accuracy.

[0018] By setting a first base, a first hinge ring, a first arc plate, a first support plate, a second base, a second arc plate, and a second support plate within the auxiliary components, the patient's leg can be lifted during operation to insert a transverse Kirschner wire. This not only facilitates the doctor's implantation operation but also adapts to the patient's leg contour, improving comfort when lifting the leg and thus enhancing the patient's cooperation.

[0019] By setting a first sliding column, a second sliding column, a first sliding seat, a second sliding seat, a first rotating handle, and a second rotating handle within the auxiliary component, medical staff can adjust the positions of the first sliding seat and the second sliding seat by rotating the first rotating handle and the second rotating handle respectively according to the scale on the first sliding column and the second sliding column, so that medical staff can perform subsequent operations.

[0020] By incorporating a first baffle, a second baffle, an abutment post, a sliding tube, a threaded tube, and a guide plate within the auxiliary components, it can not only adapt to the contours of the patient's leg but also provide guidance for the insertion of the Kirschner wire into the patient's leg, thereby improving the work efficiency of medical staff. Attached Figure Description

[0021] Figure 1 This is a first-view three-dimensional structural diagram of the tibial dual-fixation-point traction and orthopedic system based on three-dimensional navigation according to the present invention;

[0022] Figure 2 This is a second-view three-dimensional structural diagram of the tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation of the present invention;

[0023] Figure 3 This is an enlarged three-dimensional structural diagram of the first fixing plate, the second fixing plate, the first threaded post, and the scale mating of the present invention.

[0024] Figure 4 This is an enlarged three-dimensional structural diagram of the first base, second base, first support plate, second support plate, first sliding seat, and second sliding seat of the present invention.

[0025] Figure 5 This is a semi-sectional enlarged three-dimensional structural diagram of the first base, second base, first support plate, second support plate, first sliding seat and second sliding seat of the present invention.

[0026] Figure 6 This is an enlarged three-dimensional structural diagram of the first sliding seat, the second sliding seat, the first baffle, and the second baffle of the present invention.

[0027] Figure 7 This is an enlarged three-dimensional structural diagram of the contact post, sliding tube, first limiting plate, rotating cylinder and guide plate of the present invention.

[0028] Figure 8This is a half-section enlarged three-dimensional structural diagram of the contact post, sliding tube, first limiting plate, rotating cylinder and guide circular plate of the present invention.

[0029] [Figure Labels]

[0030] 1. First base; 2. First hinge ring; 3. First arc-shaped plate; 4. First support plate; 5. First rotating groove; 6. First sliding column; 7. Second base; 9. Second sliding column; 10. Second arc-shaped plate; 11. Second support plate; 12. First rotating handle; 13. First sliding seat; 14. First baffle; 15. First sliding groove; 16. First screw groove; 17. Second sliding groove; 18. Second sliding seat; 19. Second rotating groove; 20. Third sliding groove; 21. Second baffle; 22. Fourth sliding groove; 23. Second rotating handle 24. Handle; 25. Second threaded groove; 26. Sliding tube; 27. Threaded tube; 28. Guide circular plate; 29. ​​Inclined surface; 30. Rotating cylinder; 31. First limiting plate; 32. Second limiting plate; 33. Spring; 34. Abutting post; 35. Chamber; 36. Guide groove; 37. First fixing plate; 38. Arc-shaped sliding groove; 39. Limiting circular groove; 40. Second hinge ring; 41. Second fixing plate; 42. First threaded post; 43. Second threaded post; 44. Fixing block; 45. Fixing screw; 46. Third threaded post; 47. Scale. Detailed Implementation

[0031] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 8As shown, an embodiment of the present invention provides a tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation, including a first fixation plate 36 and a second fixation plate 40. There are two first fixation plates 36 and two fixation plates 40. Both the first fixation plate 36 and the second fixation plate 40 are arc-shaped aluminum alloy plates. Arc-shaped sliding grooves 37 are respectively formed on the outer wall of the middle portion of the first fixation plate 36 and the second fixation plate 40. The arc-shaped sliding grooves 37 are arc-shaped grooves. Second hinge rings 39 are fixedly connected to the ends of the first fixation plate 36 and the second fixation plate 40 near each other. The second hinge ring 39 on the first fixation plate 36 is a hollow circular aluminum alloy plate, while the second hinge ring 39 on the second fixation plate 40 consists of two hollow... A circular aluminum alloy plate is used, and the second hinge ring 39 on the first fixing plate 36 can be inserted between the second hinge rings 39 on the second fixing plate 40. A third threaded post 45 is rotatably connected to the inner wall of the second hinge ring 39. The third threaded post 45 is an aluminum alloy cylinder with threads on its outer wall. Three nuts are screwed onto the third threaded post 45. After the second hinge ring 39 slides to an appropriate position along the outer wall of the third threaded post 45, the second hinge ring 39 can be limited by tightening the two nuts, thus limiting the position of the first fixing plate 36 and the second fixing plate 40. A limiting circular groove 38 is formed on the outer wall of the first fixing plate 36 and the second fixing plate 40 away from the second hinge ring 39. The device is a circular groove. A first threaded post 41 is slidably connected to the inner wall of the limiting circular groove 38. The first threaded post 41 is an aluminum alloy cylinder with threads on its outer wall. Several second threaded posts 42 are slidably connected to the inner wall of the arc-shaped sliding groove 37. The outer contour of the second threaded post 42 is adapted to the inner contour of the arc-shaped sliding groove 37, so the second threaded post 42 can slide on the inner wall of the arc-shaped sliding groove 37. A fixing block 43 is fixedly connected to the end of the second threaded post 42 away from the central axis of the first threaded post 41. The fixing block 43 is a square aluminum alloy cylinder, and a fixing screw 44 is screwed onto the outer wall of the middle part of the fixing block 43. Medical staff Based on the CT scan of the patient's leg, the fixation block 43 is moved, causing the second threaded post 42 to slide along the inner wall of the arc-shaped sliding groove 37 to an appropriate position. Then, the nut screwed onto the outer wall of the second threaded post 42 is rotated to limit the fixation block 43. Subsequently, the fixing screw 44 screwed onto the fixation block 43 is turned, and the fixing screw 44 will penetrate the patient's tibia, thus fixing the first fixation plate 36 and the second fixation plate 40. The auxiliary component includes a first base 1 and a second base 7. Both ends of the first base 1 and the second base 7 are fixedly connected to a first hinge ring 2, which is sleeved on the outer wall of the first threaded post 41.The first base 1 and the second base 7 are each provided with a sliding post marked with a scale 46. A sliding seat is slidably connected to the sliding post. The sliding seat is provided with a sliding tube 25 and a guide plate 27. The sliding tube 25 and the guide plate 27 are used to guide the Kirschner wires.

[0033] This auxiliary component is used to assist medical staff in fixing the patient's tibia. The auxiliary component is connected to the first fixation plate 36 and the second fixation plate 40 respectively. By setting up the auxiliary component, this application can not only raise the patient's leg during the operation, making it easier for medical staff to insert Kirschner wires and improving the patient's comfort and compliance during the operation; it can also provide guidance for Kirschner wire insertion, improving the efficiency of medical staff's operation, while ensuring the parallelism of the wire path, laying the foundation for the stability of the force area in the subsequent orthopedic stage; in addition, it can use CT scan results as a reference to avoid operational errors caused by limited traction accuracy.

[0034] like Figures 1 to 5 As shown, the first hinge ring 2 is composed of two cylinders, and the distance between the two cylinders is adapted to the thickness of the first fixing plate 36 and the second fixing plate 40. The first hinge ring 2 is fixedly connected to the first fixing plate 36 and the second fixing plate 40 respectively through the first threaded post 41. A first arc plate 3 is fixedly connected to the top outer wall of the first base 1. A first support plate 4 is fixedly connected to the end of the first arc plate 3 away from the first base 1. A second arc plate 10 is fixedly connected to the top outer wall of the second base 7. A second support plate 11 is fixedly connected to the end of the second arc plate 10 away from the second base 7.

[0035] Specifically, both the first base 1 and the second base 7 are square-structured cylinders made of aluminum alloy, with several lightweight grooves on their outer walls. This reduces the weight for the patient without affecting the CT scan. There are four first hinge rings 2 in total. Two first hinge rings 2 are symmetrically fixed to both ends of the first base 1, and the other two are symmetrically fixed to both ends of the second base 7. Since the first hinge ring 2 consists of two cylinders, and the distance between the two cylinders is adapted to the thickness of the first fixing plate 36 and the second fixing plate 40, the ends of the first fixing plate 36 and the second fixing plate 40 away from the second hinge ring 39 can be inserted into the gap between the two cylinders on the first hinge ring 2. Then, the first threaded post 41 is passed through the first... The inner wall of the hinge ring 2 and the inner wall of the limiting groove 38 are then tightened, and the nuts on the first threaded post 41 are tightened to abut against both sides of the first hinge ring 2 to form a limit. The arc-shaped sliding groove 37 and the second fixing plate 40 can be fixed to both ends of the first base 1 respectively. Similarly, the other arc-shaped sliding groove 37 and the second fixing plate 40 can be fixed to both ends of the second base 7. One end of the first arc-shaped plate 3 is fixedly connected to the top outer wall of the first base 1, and the other end of the first arc-shaped plate 3 is fixedly connected to the first support plate 4. The first arc-shaped plate 3 and the first support plate 4 are both arc-shaped carbon fiber plates. The surface area of ​​the first support plate 4 is larger than the surface area of ​​the first arc-shaped plate 3, and several segmented grooves arranged in a linear array are symmetrically opened on both sides of the first support plate 4. When the patient When the leg is placed on the first support plate 4, both the first arc-shaped plate 3 and the first support plate 4 will be stressed and deform along their respective bending directions. The segmented grooves on the first support plate 4 allow it to better conform to the contour of the patient's leg during deformation. One end of the second arc-shaped plate 10 is fixedly connected to the top of the second base 7, and the other end of the second arc-shaped plate 10 is fixedly connected to the second support plate 11. Both the second arc-shaped plate 10 and the second support plate 11 are arc-shaped carbon fiber plates. The surface area of ​​the second support plate 11 is larger than that of the second arc-shaped plate 10, and several segmented grooves arranged in a linear array are symmetrically formed on both sides of the second support plate 11. When the patient's leg is placed on the second support plate 11, both the second arc-shaped plate 10 and the second support plate 11 will be stressed and deformed. The first base 1 and the second base 7 deform along their respective bending directions. The segmented grooves on the second base 11 allow it to better conform to the patient's leg contour during deformation. During preoperative CT scanning, the first base 1 and the second base 7 can be placed at appropriate positions on the CT table according to the length of the patient's leg. Then, the patient's leg is placed on the first base 4 and the second base 11. At this time, the first arc plate 3, the first base 4, the second base 11, and the second arc plate 10 will be stressed and deform along their respective bending directions. The deformation of the first base 4 and the second base 11 can adapt to the patient's leg contour, improving patient comfort. At the same time, the patient's leg is elevated, making it easier for the doctor to insert the transverse Kirschner wire in the appropriate position according to the scan results. The above structural design...During the procedure, the patient's leg can be raised to insert the transverse Kirschner wire. This facilitates the implantation procedure for the doctor, adapts to the patient's leg contour, improves comfort when the leg is raised, and thus increases patient cooperation.

[0036] like Figures 1 to 6 As shown, a first rotating groove 5 is provided on the outer wall of the first base 1 away from the second base 7. Several first sliding columns 6 are fixedly connected to the outer wall of the first base 1 near the first rotating groove 5. A first rotating handle 12 is rotatably connected to the inner wall of the first rotating groove 5. A first sliding seat 13 is screwed onto the outer wall of the first rotating handle 12. A first screw groove 16 is provided on the outer wall of the first sliding seat 13 near the first base 1. Several second sliding grooves 17 are provided on the outer wall of the first sliding seat 13 near the first screw groove 16.

[0037] Specifically, the first rotating groove 5 is formed on the outer wall of the first base 1 on the side away from the second base 7. The first rotating groove 5 is a convex groove. The first rotating handle 12 is rotatably connected to the inner wall of the first rotating groove 5. The first rotating groove 5 consists of three parts: a circular plate at one end, a cylinder with threads on its outer wall in the middle, and a cylinder with anti-slip grooves on its outer wall at the other end. It is made of aluminum alloy. Since the outer wall contour of the end with the circular plate on the first rotating handle 12 matches the inner wall contour of the first rotating groove 5, the first... A rotating handle 12 can rotate on the inner wall of the first rotating groove 5. A first sliding seat 13 is screwed onto the outer wall of the first rotating handle 12. The first sliding seat 13 is a square aluminum alloy column. A first threaded groove 16 is formed on the outer wall of the first sliding seat 13 near the first base 1. The first threaded groove 16 is a groove with threads on its inner wall. Since the inner wall contour of the first threaded groove 16 matches the outer wall contour of the middle part of the first rotating handle 12, the first rotating handle 12 can rotate in the first threaded groove 16. The first sliding seat 13 rotates on the inner wall of the first sliding base 13. Several first sliding posts 6 are fixedly connected to the outer wall of the first base 1 near the first rotating groove 5. There are two first sliding posts 6 in total, and they are symmetrical about the first rotating groove 5. Several second sliding grooves 17 are opened on the outer wall of the first sliding seat 13 near the first screw groove 16. There are two second sliding grooves 17 in total, and they are symmetrical about the first screw groove 16. Since the inner wall contour of the second sliding groove 17 matches the outer wall contour of the first sliding post 6, the first sliding seat 13 can slide on the outer wall of the first sliding post 6. When medical personnel rotate the first rotating handle 12, limited by the two first sliding posts 6, the first sliding seat 13 will not rotate synchronously with the first rotating handle 12, but will slide along the inner wall of the first sliding post 6 as the first rotating handle 12 rotates. With the above structural arrangement, medical personnel can rotate the first rotating handle 12 to drive the first sliding seat 13 to move, providing convenience for subsequent operations.

[0038] like Figures 1 to 6As shown, a second threaded groove 24 is provided on the outer wall of the second base 7 away from the first base 1. Several second sliding posts 9 are fixedly connected to the outer wall of the second base 7 near the first base 1. Scales 46 are provided on the outer walls of both the first sliding posts 6 and the second sliding posts 9. A second rotating handle 23 is threaded onto the inner wall of the second threaded groove 24. A second sliding seat 18 is rotatably connected to the end of the second rotating handle 23 near the first base 1. A second rotating groove 19 is provided on the outer wall of the second sliding seat 18 near the second base 7. Several third sliding grooves 20 are provided on the outer wall of the second sliding seat 18 near the second rotating groove 19. Specifically, the second threaded groove 24 is located on the outer wall of the second base 7 away from the first base 1. The groove 24 is a circular groove with threads on its inner wall. The second rotating handle 23 is screwed onto the inner wall of the second threaded groove 24. The second rotating handle 23 consists of three parts: a circular plate at one end, a cylinder with threads on its outer wall in the middle, and a cylinder with anti-slip grooves on its outer wall at the other end. It is made of aluminum alloy. Since the outer wall contour of the middle part of the second rotating handle 23 matches the inner wall contour of the second threaded groove 24, the second rotating handle 23 can rotate and move along the inner wall of the second threaded groove 24. Furthermore, since the second sliding seat 18 is rotatably connected to the end of the second rotating handle 23 near the first base 1, the second rotating groove 19 is formed on the outer wall of the second sliding seat 18 near the second base 7. The second rotating groove 19 is a convex groove. The outer wall contour of one end of the circular plate is adapted to the inner wall contour of the second rotating groove 19, so the second rotating handle 23 can rotate on the inner wall of the second rotating groove 19. When the medical staff rotates the second rotating handle 23, the second rotating handle 23 will rotate and move along the inner wall of the second threaded groove 24. At this time, the end of the second rotating handle 23 near the second sliding seat 18 will rotate on the inner wall of the second threaded groove 24 and drive the second sliding seat 18 to move. Several second sliding posts 9 are fixedly connected to the outer wall of the second base 7 near the first base 1. There are two second sliding posts 9 in total. The two second sliding posts 9 are symmetrical about the second threaded groove 24. The second sliding posts 9 are aluminum alloy cylinders. Also, because several third sliding grooves 20 are opened in the second... The sliding seat 18 is located near the outer wall of the second rotating groove 19. The third sliding groove 20 is a circular groove, and there are two third sliding grooves 20. The two third sliding grooves 20 are symmetrical about the second rotating groove 19. Since the inner wall contour of the third sliding groove 20 matches the outer wall contour of the second sliding column 9, the second sliding seat 18 can slide on the inner wall of the second sliding column 9. At the same time, it is limited by the two second sliding columns 9. The second sliding seat 18 will not rotate when sliding on the outer wall of the second sliding column 9. When the medical staff rotates the second rotating handle 23, the second rotating handle 23 will rotate along the inner wall of the second screw groove 24. At the same time, the end of the second rotating handle 23 near the second sliding seat 18 will rotate on the inner wall of the second rotating groove 19.This causes the second sliding seat 18 to shift along the inner wall of the second sliding column 9. Since both the first sliding column 6 and the second sliding column 9 have graduations 46 on their outer walls, this structural arrangement allows medical personnel to adjust the positions of the first sliding seat 13 and the second sliding seat 18 by rotating the first rotating handle 12 and the second rotating handle 23 according to the graduations 46 on the first sliding column 6 and the second sliding column 9, facilitating subsequent operations.

[0039] like Figures 4 to 8 As shown, the first sliding seat 13 has a first baffle 14 symmetrically fixedly connected to both ends. A first sliding groove 15 is formed on the outer wall of the first baffle 14 near its center. The second sliding seat 18 has a second baffle 21 symmetrically fixedly connected to both ends. A fourth sliding groove 22 is formed on the outer wall of the second baffle 21 near its top. Sliding tubes 25 are slidably connected to the inner walls of the first sliding groove 15 and the fourth sliding groove 22, respectively. Specifically, the two first baffles 14 are symmetrically fixedly connected to both ends of the first sliding seat 13. The first baffle 14 is a square aluminum alloy plate, and the first sliding groove 15 is formed on the first baffle 14. 4. On the outer wall near the middle, the first sliding groove 15 is a square-shaped groove. When medical staff rotate the first rotating handle 12, the first baffle 14 will move synchronously with the first sliding seat 13. Two second baffles 21 are symmetrically fixedly connected to both ends of the second sliding seat 18. The second baffles 21 are Z-shaped aluminum alloy plates. The fourth sliding groove 22 is opened on the outer wall near the top of the second baffle 21. The fourth sliding groove 22 is a square-shaped groove. When medical staff rotate the second rotating handle 23, the second baffle 21 will move synchronously with the second sliding seat 18. The four sliding tubes 25 slide respectively. The sliding tube 25 is a hollow aluminum alloy cylinder, which is dynamically connected to the inner walls of the two first sliding grooves 15 and the two fourth sliding grooves 22. Since the outer wall contour of the sliding tube 25 matches the inner wall contours of the first sliding groove 15 and the fourth sliding groove 22 respectively, the sliding tube 25 can slide on the inner walls of the first sliding groove 15 and the fourth sliding groove 22 respectively. A first limiting plate 30 is fixedly connected to the outer wall of the sliding tube 25 near the middle. A threaded tube 26 is fixedly connected to the end of the sliding tube 25 away from the central axis of the second sliding seat 18. A rotating cylinder 29 is screwed onto the outer wall of the threaded tube 26. The threaded tube 26 is located away from the sliding seat 18. One end of the tube 25 is fixedly connected to a guide plate 27. The inner wall of the guide plate 27 away from the threaded tube 26 has an inclined surface 28. The end of the sliding tube 25 away from the threaded tube 26 is fixedly connected to a second limiting plate 31. The outer wall of the second limiting plate 31 away from the sliding tube 25 has a spring 32 fixedly connected to it. The outer wall of the sliding tube 25 away from the threaded tube 26 has a sliding contact post 33. The inside of the contact post 33 has a chamber 34. The inner wall of the chamber 34 away from the second limiting plate 31 has a guide groove 35. The inner wall of the guide groove 35 away from the chamber 34 has a rounded corner.

[0040] Specifically, the first limiting plate 30 is fixedly connected to the outer wall of the sliding tube 25 near the middle, and the threaded tube 26 is fixedly connected to the end of the sliding tube 25 away from the central axis of the second sliding seat 18. The first limiting plate 30 is a circular aluminum alloy plate with a chamfer on the outer wall near the threaded tube 26. The sliding tube 25 is an aluminum alloy tube with threads on its outer wall. Since the distance between the first limiting plate 30 and the threaded tube 26 is adapted to the thickness of the first baffle 14 and the second baffle 21, this arrangement provides clearance when the sliding tube 25 slides on the inner walls of the first sliding groove 15 and the fourth sliding groove 22, respectively. The rotating cylinder 29 is screwed onto the threaded tube 26. On its outer wall, the rotating cylinder 29 is a hollow aluminum alloy cylinder, and anti-slip grooves are provided on its outer wall. Threaded grooves are provided on its inner wall. Because the inner wall contour of the rotating cylinder 29 matches the outer wall contour of the threaded tube 26, the rotating cylinder 29 can rotate and move on the outer wall of the threaded tube 26. When medical personnel rotate the rotating cylinder 29, it will rotate and move on the outer wall of the threaded tube 26. The end of the rotating cylinder 29 closest to the first limiting plate 30 will abut against the outer wall of the first baffle 14 or the second baffle 21, thus fixing the sliding tube 25. The guide plate 27 is fixedly connected to the end of the threaded tube 26 away from the sliding tube 25. The guide plate 27 is a hollow aluminum alloy cylinder. Furthermore, a bevel 28 is formed on the inner wall of the guide plate 27 at the end away from the threaded tube 26. The bevel 28 can provide guidance for the insertion of the Kirschner wire. The second limiting plate 31 is fixedly connected to the end of the sliding tube 25 away from the threaded tube 26. The second limiting plate 31 is a hollow aluminum alloy round plate. A contact post 33 is slidably connected to the outer wall of the end of the sliding tube 25 away from the threaded tube 26. The contact post 33 is a bullet-shaped aluminum alloy cylinder. The cavity 34 is formed inside the contact post 33. The cavity 34 is a cylindrical groove. The contour of the outer wall of the second limiting plate 31 matches the contour of the inner wall of the cavity 34. Therefore, the sliding tube 25 can drive the second limiting plate 31 to slide on the inner wall of the cavity 34. 1. It can prevent the sliding tube 25 from sliding out of the chamber 34. A spring 32 is fixedly connected to the outer wall of the second limiting plate 31 away from the sliding tube 25. The other end of the spring 32 is fixedly connected to the inner wall of the chamber 34 away from the sliding tube 25. When the abutting post 33 slides along the outer wall of the sliding tube 25 toward the threaded tube 26, the spring 32 will be stressed and deform along its bending direction. The guide groove 35 is opened on the inner wall of the chamber 34 away from the threaded tube 26, and the guide groove 35 passes through the end of the abutting post 33 away from the threaded tube 26. Since the inner wall of the guide groove 35 away from the spring 32 is provided with a rounded corner, this setting facilitates the insertion and exit of the Kirschner wire.

[0041] Based on the CT scan, medical staff pinch the rotating cylinder 29 to move the sliding tube 25 sequentially along the inner walls of the two first sliding grooves 15 and the two fourth sliding grooves 22 to the appropriate position. Then, the rotating cylinder 29 is rotated, and it moves along the outer wall of the threaded tube 26 towards the first limiting plate 30. At this time, the end of the rotating cylinder 29 near the first limiting plate 30 will abut against the outer wall of the first baffle 14 or the second baffle 21, thus fixing the sliding tube 25 in the appropriate position. During this process, the end of the abutment post 33 away from the first limiting plate 30 will abut against the skin of the patient's leg under the guidance of the inclined outer wall of the abutment post 33. At this time, the abutment post 33 will move along the outer wall of the sliding tube 25 towards the threaded tube 26. The spring 32 slides in the direction of bending, and under the guidance of the inclined plane 28, it can be inserted into the patient's leg sequentially through the inner wall of the threaded tube 26, the inner wall of the sliding tube 25, and the inner wall of the guide groove 35. Then it exits from the other side of the patient's leg and enters the guide groove 35 under the guidance of the rounded corner on the guide groove 35. Then it exits sequentially through the inner wall of the sliding tube 25, the inner wall of the threaded tube 26, and the inner wall of the guide plate 27. In this way, two Kirschner wires can be inserted into the calcaneus and the anterolateral position of the tibial tuberosity, respectively. The above structure not only adapts to the contour of the patient's leg, but also provides guidance for the Kirschner wires to be inserted into the patient's leg, which helps to improve the work efficiency of medical staff.

[0042] The working process of the tibial dual-fixation-point traction and orthopedic system based on three-dimensional navigation provided by this invention is as follows:

[0043] In the above scheme, during preoperative CT scanning, the first base 1 and the second base 7 can be placed at appropriate positions on the CT bed according to the length of the patient's legs. Then, the patient's legs are placed on the first support plate 4 and the second support plate 11. At this time, the first arc plate 3, the first support plate 4, the second support plate 11, and the second arc plate 10 will be subjected to force and deform along their respective bending directions. The deformation of the first support plate 4 and the second support plate 11 can adapt to the contour of the patient's legs, improving patient comfort. At the same time, the patient's legs are raised. Subsequently, according to the CT scan, the medical staff pinch the rotating cylinder 29 to drive the sliding tube 25 to slide along the inner walls of the two first sliding grooves 15 and the two fourth sliding grooves 22 to the appropriate position. Then, the rotating cylinder 29 is rotated. The rotating cylinder 29 will move along the outer wall of the threaded tube 26 towards the first limiting plate 30. At this time, the end of the rotating cylinder 29 near the first limiting plate 30 will abut against the outer wall of the first baffle 14 or the second baffle 21, thus fixing the sliding tube 25 in the appropriate position. During this process, the end of the abutment post 33 away from the first limiting plate 30 will abut against the skin of the patient's leg under the guidance of the inclined outer wall of the abutment post 33. At this time, the abutment post 33 will slide along the outer wall of the sliding tube 25 towards the threaded tube 26, and the spring 32 will be stressed and deform along its bending direction. Then, under the guidance of the inclined surface 28, it can sequentially penetrate into the patient's leg through the inner wall of the threaded tube 26, the inner wall of the sliding tube 25, and the inner wall of the guide groove 35. The needles emerge from the other side of the patient's leg and, guided by the rounded corners of the guide groove 35, enter the guide groove 35. They then pass through the inner wall of the sliding tube 25, the inner wall of the threaded tube 26, and the inner wall of the guide plate 27 in sequence. This allows two Kirschner wires to be inserted into the calcaneus and the anterolateral aspect of the tibial tuberosity, respectively. Then, medical personnel manipulate the two first fixation plates 36 and the two second fixation plates 40, inserting their ends near the limiting groove 38 into the gaps between the first hinge rings 2 at both ends of the first base 1 and the second base 7. Next, the nuts on the outer wall of the third threaded post 45 are tightened to secure the first fixation plates 36 and 40. Finally, the first threaded post 41 is passed through the... The inner wall of the hinge ring 2 and the inner wall of the limiting circular groove 38 are then tightened, and the nuts on the first threaded post 41 are tightened to abut against both sides of the first hinge ring 2 to form a limit. The arc-shaped sliding groove 37 and the second fixing plate 40 can then be fixed to both ends of the first base 1. Similarly, the other arc-shaped sliding groove 37 and the second fixing plate 40 can be fixed to both ends of the second base 7. Then, according to the complete orthopedic and extension scheme generated by the navigation system automatically registering the skeleton and the device, and in conjunction with the scale 46 set on the outer wall of the first sliding post 6 and the second sliding post 9, the first rotating handle 12 and the second rotating handle 23 are rotated respectively. Under the limit of the two first sliding posts 6, the first sliding seat 13 will not rotate synchronously with the first rotating handle 12, but will rotate with the first rotating handle 12.The first sliding post 6 slides along its inner wall, while the second rotating handle 23 rotates along its inner wall. Simultaneously, the end of the second rotating handle 23 near the second sliding seat 18 rotates on the inner wall of the second rotating groove 19, causing the second sliding seat 18 to move along its inner wall. During this process, the first baffle 14 and the second baffle 21 respectively displace the four sliding tubes 25, leading to movement of the Kirschner wires and creating a traction force on the patient's leg to correct its shape.

[0044] In this embodiment, the first sliding post 6, the second sliding post 9, the first sliding seat 13, and the second sliding seat 18, all with graduations 46, are mounted on the first base 1 and the second base 7. Together with the sliding tube 25 and the guide plate 27, they constitute the auxiliary components of this system. The graduations 46 are used to precisely adjust the traction distance based on the CT scan results, while the sliding tube 25 and the guide plate 27 provide parallel guidance during Kirschner wire insertion, thereby avoiding puncture deviation and limited traction accuracy.

[0045] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles described in the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation, comprising a first fixation plate and a second fixation plate, characterized in that, Arc-shaped sliding grooves are respectively formed on the outer wall of the middle portion of the first fixing plate and the second fixing plate. A second hinge ring is fixedly connected to the end of the first fixing plate and the second fixing plate close to each other. A third threaded post is rotatably connected to the inner wall of the second hinge ring. A limiting circular groove is formed on the outer wall of the end of the first fixing plate and the second fixing plate away from the second hinge ring. A first threaded post is slidably connected to the inner wall of the limiting circular groove. A plurality of second threaded posts are slidably connected to the inner wall of the arc-shaped sliding groove. A fixing block is fixedly connected to the end of the second threaded post away from the central axis of the first threaded post. A fixing screw is screwed onto the outer wall of the middle portion of the fixing block. An auxiliary component includes a first base and a second base. Both ends of the first base and the second base are fixedly connected to a first hinge ring, which is sleeved on the outer wall of the first threaded post. The first base and the second base are respectively provided with a graduated sliding post. A sliding seat is slidably connected to the sliding post. The sliding seat is provided with a sliding tube and a guide plate. The sliding tube and the guide plate are used to guide the Kirschner wires.

2. The tibial dual-fixation-point traction and orthopedic system based on three-dimensional navigation according to claim 1, characterized in that, The first hinge ring is composed of two cylinders, and the distance between the two cylinders is adapted to the thickness of the first fixing plate and the second fixing plate. The first hinge ring is fixedly connected to the first fixing plate and the second fixing plate respectively through the first threaded post.

3. The tibial dual-fixation-point traction and orthopedic system based on three-dimensional navigation according to claim 1, characterized in that, A first arc-shaped plate is fixedly connected to the top outer wall of the first base, and a first support plate is fixedly connected to the end of the first arc-shaped plate away from the first base. A second arc-shaped plate is fixedly connected to the top outer wall of the second base, and a second support plate is fixedly connected to the end of the second arc-shaped plate away from the second base.

4. The tibial dual-fixation-point traction and orthopedic system based on three-dimensional navigation according to claim 1, characterized in that, A first rotating groove is provided on the outer wall of the first base away from the second base. A plurality of first sliding columns are fixedly connected to the outer wall of the first base near the first rotating groove. A first rotating handle is rotatably connected to the inner wall of the first rotating groove. A first sliding seat is screwed onto the outer wall of the first rotating handle.

5. The tibial dual-fixation-point traction and orthopedic system based on three-dimensional navigation according to claim 4, characterized in that, The first sliding seat has a first baffle fixedly connected to both ends symmetrically. A first screw groove is provided on the outer wall of the first sliding seat near the first base. A plurality of second sliding grooves are provided on the outer wall of the first sliding seat near the first screw groove. A first sliding groove is provided on the outer wall of the first baffle near the middle.

6. The tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation according to claim 5, characterized in that, The second base has a second screw groove on the outer wall of the side away from the first base. Several second sliding columns are fixedly connected to the outer wall of the second base near the first base. The outer walls of the first sliding column and the second sliding column are both provided with scales. A second rotating handle is screwed onto the inner wall of the second screw groove. A second sliding seat is rotatably connected to the end of the second rotating handle near the first base.

7. The tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation according to claim 6, characterized in that, The second sliding seat has a second rotating groove on the outer wall of one side near the second base, and a plurality of third sliding grooves on the outer wall of one side near the second rotating groove. The two ends of the second sliding seat are symmetrically fixedly connected with second baffles, and the outer wall of the second baffle near the top has a fourth sliding groove.

8. The tibial dual-fixation-point traction and orthopedic system based on three-dimensional navigation according to claim 7, characterized in that, Sliding tubes are slidably connected to the inner walls of the first sliding groove and the fourth sliding groove, respectively. A first limiting plate is fixedly connected to the outer wall of the sliding tube near the middle. A threaded tube is fixedly connected to the end of the sliding tube away from the central axis of the second sliding seat. A rotating cylinder is screwed onto the outer wall of the threaded tube.

9. The tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation according to claim 8, characterized in that, A guide plate is fixedly connected to the end of the threaded tube away from the sliding tube. An inclined surface is formed on the inner wall of the end of the guide plate away from the threaded tube. A second limiting plate is fixedly connected to the end of the sliding tube away from the threaded tube. A spring is fixedly connected to the outer wall of the second limiting plate on the side away from the sliding tube.

10. The tibial dual-fixation-point traction orthopedic system based on three-dimensional navigation according to claim 9, characterized in that, A contact post is slidably connected to the outer wall of the end of the sliding tube away from the threaded tube. A cavity is formed inside the contact post. A guide groove is formed on the inner wall of the cavity away from the second limiting plate. A rounded corner is provided on the inner wall of the guide groove away from the cavity.

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