Multifunctional knee joint opening marrow combined guide plate

Abstract

The application relates to a knee joint multifunctional marrow opening combined guide plate, which comprises a guide plate, the guide plate is provided with a bone cutting opening at the beginning, the guide plate is used for being connected with a femur and a tibia, and a plurality of Kirschner wire holes are formed in the guide plate. In use, the guide plate is connected to the corresponding femur or tibia, Kirschner wires are drilled into the bone through the Kirschner wire holes, so that the fixation of the guide plate is completed, the tibia or femur is cut through the bone cutting opening, so that the error in the bone cutting process is reduced, the bone cutting precision is improved, and the treatment effect is improved.

Description

Technical Field

[0001] This application relates to the field of implantable orthopedic technology, and in particular to a multifunctional open-heart surgery guide plate for the knee joint. Background Technology

[0002] The knee joint is an important weight-bearing joint in the lower limbs. When knee joint disease is severe, patients not only suffer from pain but also have impaired mobility, thus requiring total knee replacement surgery. Knee replacement surgery involves removing part of the original bone and replacing it with an artificial joint.

[0003] Currently, during total knee replacement surgery, osteotomy and leveling are usually required to ensure a close fit between the prosthesis and the bone. This osteotomy procedure relies heavily on the surgeon's experience.

[0004] Regarding the aforementioned techniques, due to varying levels of surgical experience among surgeons, errors may occur in the osteotomy location, affecting the placement and orientation of the femoral prosthesis and thus the surgical outcome. Summary of the Invention

[0005] To reduce errors during osteotomy and improve surgical outcomes, this application provides a multifunctional open-heart surgery guide plate for the knee joint.

[0006] The multifunctional open-heart surgery guide plate for the knee joint provided in this application adopts the following technical solution:

[0007] A multifunctional open-heart joint guide plate for the knee joint includes a guide plate with an osteotomy opening at the beginning, the guide plate being used to connect with the femur and tibia, and the guide plate having a plurality of Kirschner wire holes.

[0008] By adopting the above technical solution, during use, the guide plate is connected to the corresponding femoral tibia, and Kirschner wires are drilled into the bone through Kirschner wire holes to fix the guide plate. Osteotomy is performed on the femoral tibia through the osteotomy opening, thereby reducing the error in the osteotomy process, improving the osteotomy accuracy, and improving the treatment effect.

[0009] Optionally, the guide plate is connected to several guide cylinders, each of which is connected to a Kirschner wire hole. The guide cylinder is used to guide the Kirschner wire into the Kirschner wire hole.

[0010] By adopting the above technical solution and adding a guide cylinder, the Kirschner wire moves along the guide cylinder and approaches the Kirschner wire hole during use, thereby minimizing angular deviation when the Kirschner wire passes through the Kirschner wire hole and further improving the accuracy of operation.

[0011] Optionally, the guide plate has an opening positioning hole.

[0012] By adopting the above technical solution, a medullary canal positioning hole is provided. In use, the medullary canal positioning hole is used to position the medullary needle. The medullary needle passes through the medullary canal positioning hole to complete the medullary canal opening of the femoral condyle and tibial plateau, which facilitates the removal of damaged bone marrow. This makes it easier to complete the medullary canal opening and osteotomy of the femoral condyle and tibial plateau at the same time, thereby improving work efficiency.

[0013] Optionally, the guide plate is connected to a guide tube, which communicates with the medullary canal positioning hole. The guide tube is used to guide the medullary needle to the medullary canal positioning hole.

[0014] By adopting the above technical solution and adding a guide tube, the angle of the medullary needle may deviate when it approaches the medullary opening positioning hole, thereby improving the accuracy of medullary opening.

[0015] Optionally, the guide cylinder is connected to the guide plate via a connecting block. The Kirschner wire holes are strip-shaped holes. The connecting block slides along the length of the strip-shaped hole and fits into the strip-shaped hole. The connecting block is connected to a first locking component, which is used to lock the connecting block to the guide plate.

[0016] By adopting the above technical solution, the connecting block can be moved according to the operation needs during use. After being moved to the corresponding position, the connecting block is locked to the guide plate by the first locking component, thereby further adjusting the position of the Kirschner wire hole, improving the operation accuracy, and minimizing the impact of errors caused by trial and error in the production process.

[0017] Optionally, the first locking component includes an abutment plate and a pusher, wherein the abutment plate is slidably engaged with the connecting block, and the pusher is used to push the abutment plate to move and drive the abutment plate to press against the guide plate.

[0018] By adopting the above technical solution, when the connecting block moves to the corresponding position, the pushing member pushes the abutment plate to move and makes the abutment plate press against the guide plate, thereby making the connecting block stably connected to the guide plate.

[0019] Optionally, the abutment plate is connected to a plurality of friction strips near the guide plate, the friction strips being used to contact the guide plate.

[0020] By adopting the above technical solution and adding friction strips, the friction between the guide plate and the abutment plate is increased, thereby improving the connection stability between the abutment plate and the guide plate.

[0021] Optionally, a positioning plate is provided on one side of the guide plate. The positioning plate is connected to the guide plate via a connecting rod. The positioning plate is used to contact the femoral tibia. The positioning plate and the guide plate are respectively located on both sides of the femoral tibia. The connecting rod slides and engages with the guide plate, causing the positioning plate to move closer to or away from the guide plate. The guide plate is connected to a second locking assembly. The second locking assembly is used to lock the connecting rod to the guide plate. When the connecting rod is locked to the guide plate by the second locking assembly, the positioning plate contacts the femoral tibia.

[0022] By adopting the above technical solution, during use, the positioning plate is set away from the guide plate. After the guide plate contacts the femoral tibia, the connecting rod is moved so that the positioning plate is close to the guide plate and the femoral tibia. Both the guide plate and the positioning plate are in contact with the femoral tibia, thereby positioning the guide plate. This reduces the positional deviation caused by insufficient reference when positioning the guide plate and further improves the operating accuracy.

[0023] Optionally, the second locking component includes a positioning block and a moving member. The connecting rod has a limiting hole. The positioning block is used to engage with the limiting hole, and the moving member is used to drive the positioning block to move and cause the positioning block to engage with the limiting hole.

[0024] By adopting the above technical solution, when the connecting rod moves during use, and the positioning plate contacts the femoral tibia, the limiting block approaches the limiting hole, and the moving part drives the limiting block to engage in the limiting hole, thereby making the connecting rod stably connected to the guide plate and improving the connection stability between the positioning plate and the femoral tibia.

[0025] Optionally, the moving part is a spring, one end of which is connected to the guide plate and the other end of which is connected to the positioning block. The spring is used to drive the positioning block to move and cause the positioning block to engage in the limiting hole.

[0026] By adopting the above technical solution, when the limiting block approaches the limiting hole, the spring drives the positioning block to move and causes the positioning block to engage in the limiting hole, thereby facilitating the locking of the connecting rod.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. In use, the guide plate is connected to the corresponding femoral tibia. Kirschner wires are drilled into the bone through the Kirschner wire holes to fix the guide plate. Osteotomy is performed on the femoral tibia through the osteotomy opening, thereby reducing the error in the osteotomy process, improving the accuracy of osteotomy, and improving the treatment effect.

[0029] 2. It is equipped with a medullary canal positioning hole. During use, the medullary canal positioning hole is used to position the medullary needle. The medullary needle passes through the medullary canal positioning hole to complete the medullary canal opening of the femoral condyle and tibial plateau, which facilitates the removal of damaged bone marrow. This makes it easier to complete the medullary canal opening and osteotomy of the femoral condyle and tibial plateau at the same time, thereby improving work efficiency.

[0030] 3. When in use, the positioning plate is set away from the guide plate. After the guide plate contacts the femoral tibia, move the connecting rod so that the positioning plate is close to the guide plate and the femoral tibia. Both the guide plate and the positioning plate are in contact with the femoral tibia. This is used to position the guide plate, reducing the possibility of positional deviation due to insufficient reference when positioning the guide plate, and further improving the operation accuracy. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural schematic diagram of Example 1.

[0032] Figure 2 This is a three-dimensional structural diagram of Example 2.

[0033] Figure 3 This is a cross-sectional view of Embodiment 2, used to show the connecting rod.

[0034] Figure 4 This is a cross-sectional perspective view of Embodiment 2, used to illustrate the second locking component.

[0035] Figure 5 This is Example 2 Figure 3 Enlarged view of part A in the middle.

[0036] Explanation of reference numerals in the attached drawings: 100, guide plate; 110, guide cylinder; 120, guide tube; 200, osteotomy incision; 300, Kirschner wire hole; 310, connecting block; 311, connecting hole; 312, moving block; 313, support block; 314, moving groove; 315, connecting groove; 400, medullary canal positioning hole; 500, connecting rod; 510, curved rod; 520, straight rod; 521, limiting hole; 600, positioning plate; 700, mounting block; 710, moving hole; 720, connecting channel; 800, second locking assembly; 810, positioning block; 811, first block; 812, sliding hole; 820, spring; 900, first locking assembly; 910, abutment plate; 911, guide surface; 912, friction strip; 920, bolt. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0038] This application discloses a multifunctional open-heart surgery guide plate for the knee joint. (Refer to...) Figure 1 A multifunctional open-heart joint guide plate for the knee joint includes a guide plate 100, an osteotomy opening 200 at the beginning of the guide plate 100, a plurality of Kirschner wire holes 300 for Kirschner wires to pass through, an open-heart joint positioning hole 400, and the guide plate 100 is used to connect with the femoral tibia.

[0039] Reference Figure 1 The guide plate 100 is fitted against the femur at its end near the tibia. Several guide tubes 110 are connected to the guide plate 100, each guide tube 110 communicating with a Kirschner wire hole 300. The guide tube 110 guides the Kirschner wire into the Kirschner wire hole 300. The guide plate 100 is also connected to a guide tube 120, which communicates with the medullary canal positioning hole 400. The guide tube 120 guides the medullary canal needle into the medullary canal positioning hole 400.

[0040] The implementation principle of Embodiment 1 of this application is as follows: By planning the osteotomy position before surgery and realizing personalized customization through 3D printing technology, the guide plate 100 is placed on the femoral tibia and fits the guide plate 100 with the femoral tibia. Kirschner wires are drilled into the bone through Kirschner wire holes 300 to connect the guide plate 100 to the femoral tibia. The medullary canal opening needle opens the medullary canal of the femoral condyle and tibial plateau through the medullary canal opening positioning hole 400 to remove the damaged bone marrow. Osteotomy is performed through the osteotomy opening 200 using osteotomy tools. Osteotomy through the osteotomy opening 200 and opening the medullary canal of the femoral condyle and tibial plateau through the medullary canal opening positioning hole 400 improve the accuracy of operation and improve the treatment effect.

[0041] Example 2,

[0042] The difference between this embodiment and Embodiment 1 is as follows:

[0043] Reference Figure 2 and Figure 3 A connecting rod 500 is slidably connected to the guide plate 100. One end of the connecting rod 500 is connected to the guide plate 100 along its length, and the other end is connected to a positioning plate 600, which is used to contact the femoral tibia. In use, the positioning plate 600 and the guide plate 100 are respectively positioned on both sides of the femoral tibia. The addition of the positioning plate 600 facilitates the positioning of the guide plate 100 and reduces the possibility of the guide plate 100 shifting position.

[0044] Reference Figure 3 and Figure 4 The connecting rod 500 includes a curved rod 510 and a straight rod 520. One end of the curved rod 510 is connected to the positioning plate 600, and the other end of the curved rod 510 is connected to one end of the straight rod 520. The end of the straight rod 520 away from the curved rod 510 slides along the length of the straight rod 520 and engages with the guide plate 100. The guide plate 100 is connected to a mounting block 700, which has a moving hole 710. The depth direction of the moving hole 710 is consistent with the length direction of the straight rod 520, and the straight rod 520 slides along its length and engages with the inner wall of the moving hole 710.

[0045] Reference Figure 3 and Figure 4 The mounting block 700 is connected to a second locking assembly 800, which is used to lock the straight rod 520 to the mounting block 700. The second locking assembly 800 includes a positioning block 810 and a moving part. The straight rod 520 has a limiting hole 521, one end of which is open, and the positioning block 810 is used to engage with the limiting hole 521.

[0046] Reference Figure 3 and Figure 4The mounting block 700 has a connecting channel 720, the length of which is aligned with the thickness of the straight rod 520, and the middle of the connecting channel 720 communicates with the moving hole 710. The positioning block 810 is aligned with the length of the connecting channel 720, and the positioning block 810 slides along the length of the connecting channel 720 to fit against the inner wall of the connecting channel 720. One end of the positioning block 810 passes through the inner wall of the connecting channel 720 along its length, and the other end of the positioning block 810 is connected to a first block 811, the width of which is greater than the width of the positioning block 810.

[0047] Reference Figure 3 and Figure 4 The positioning block 810 has a sliding hole 812. The depth direction of the sliding hole 812 is consistent with the length direction of the straight rod 520. The sliding hole 812 is open at one end along the width direction of the connecting rod 500. The sliding hole 812 is used to communicate with the moving hole 710 and to allow the straight rod 520 to pass through. When the sliding hole 812 is connected to the moving hole 710, the straight rod 520 slides along its length and engages with the inner wall of the sliding hole 812 and the inner wall of the moving hole 710.

[0048] Reference Figure 4 The moving component is a spring 820. The length direction of the spring 820 is consistent with the length direction of the connecting channel 720, and one end of the spring 820 is connected to the inner wall of the connecting channel 720, while the other end is connected to the positioning block 810. The spring 820 is used to drive the positioning block 810 to move and cause the positioning block 810 to engage in the limiting hole 521. When the moving hole 710 is connected to the sliding hole 812, the spring 820 is stretched and deformed. When the straight rod 520 moves to the corresponding position, the limiting hole 521 approaches the positioning block 810, and at the same time, the spring 820 returns to its shape and pushes the positioning block 810 to engage in the limiting hole 521, thereby making the straight rod 520 stably connected to the mounting block 700.

[0049] Reference Figure 2 and Figure 5 The Kirschner wire hole 300 is a strip-shaped hole, and a connecting block 310 is slidably fitted onto the inner wall of the Kirschner wire hole 300. The connecting block 310 slides along the length of the Kirschner wire hole 300 and fits into the inner wall of the Kirschner wire hole 300. A guide cylinder 110 is connected to the connecting block 310, and the connecting block 310 has a connecting hole 311, which connects the guide cylinder 110 and the Kirschner wire hole 300. The connecting block 310 slides along the length of the Kirschner wire hole 300 and is connected inside the Kirschner wire hole 300, which facilitates the adjustment of the Kirschner wire drilling position and avoids the influence of production process errors on the Kirschner wire drilling position.

[0050] Reference Figure 3 and Figure 5The connecting block 310 includes a movable block 312 and a support block 313. The movable block 312 is disposed inside the Kirschner wire hole 300 and slides along the length of the Kirschner wire hole 300 to engage with the inner wall of the Kirschner wire hole 300. The support block 313 is connected to one side of the movable block 312, and a cylinder is connected to the support block 313. The width of the support block 313 is greater than the width of the Kirschner wire hole 300, and the support block 313 slides along the length of the Kirschner wire hole 300 to engage with the guide plate 100.

[0051] Reference Figure 5 The support block 313 is connected to a first locking component 900, which is used to lock the connecting block 310 to the guide plate 100. The first locking component 900 includes an abutment plate 910 and a pusher. The support block 313 has a moving groove 314, the length direction of which is consistent with the thickness direction of the support block 313. The abutment plate 910 slides along the thickness direction of the support block 313 and fits against the inner wall of the moving groove 314. A connecting groove 315 is formed at one end of the moving groove 314 along the width direction of the Kirschner wire hole 300. The connecting groove 315 is located at the end of the moving groove 314 away from the guide plate 100.

[0052] Reference Figure 3 and Figure 5 The pushing component is a bolt 920, the length direction of which is consistent with the length direction of the connecting groove 315, and the bolt 920 is threaded into the connecting groove 315. A guide surface 911 is provided at the end of the abutment block near the bolt 920. The guide surface 911 is inclined, and the end of the guide surface 911 away from the guide plate 100 is inclined towards the side away from the bolt 920. Several friction strips 912 are connected to the abutment plate 910 near the guide plate 100. The length direction of the friction strips 912 is consistent with the length direction of the Kirschner wire holes 300, and the friction strips 912 are evenly spaced along the width direction of the Kirschner wire holes 300 on the abutment plate 910. The friction strips 912 are made of rubber. When the connecting block 310 moves to the corresponding position, the bolt 920 is tightened. The bolt 920 pushes the abutment plate 910 closer to the guide plate 100, causing the abutment plate 910 to press firmly against the guide plate 100, thereby ensuring that the connecting block 310 is stably connected to the guide plate 100.

[0053] The implementation principle of Embodiment 2 of this application is as follows: During use, the guide plate 100 is brought into contact with the femoral tibia, and the guide plate 100 is in close contact with the femoral tibia. The straight rod 520 is moved along its length direction, and the curved rod 510 and the positioning plate 600 follow the straight rod 520, so that the positioning plate 600 approaches and contacts the femoral tibia, thereby positioning the guide plate 100 and reducing the possibility of displacement of the guide plate 100. After positioning, if there is an error between the position of the guide cylinder 110 and the actual required position, the connecting block 310 is moved so that the connecting block 310 slides along the length direction of the Kirschner wire hole 300 and fits into the inner wall of the Kirschner wire hole 300. When the connecting block 310 moves to the corresponding position, the bolt 920 is tightened. The bolt 920 pushes the abutment plate 910 to move and drives the abutment plate 910 to press against the guide plate 100, thereby making the connecting block 310 stably connected to the guide plate 100, thereby reducing the impact of production process errors on the position of the Kirschner wire drilling.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multifunctional open-heart surgery guide plate for the knee joint, characterized in that: The device includes a guide plate (100) for connecting to the femur and tibia, and the guide plate (100) having a plurality of Kirschner wire holes (300); the guide plate (100) is connected to a plurality of guide cylinders (110), each of the guide cylinders (110) communicating with a Kirschner wire hole (300), and the guide cylinders (110) guiding the Kirschner wire into the Kirschner wire hole (300); the guide plate (100) has a medullary canal opening positioning hole (400). The guide plate (100) is connected to a guide tube (120), which communicates with the medullary canal positioning hole (400). The guide tube (120) is used to guide the medullary needle to communicate with the medullary canal positioning hole (400). The guide tube (110) is connected to the guide plate (100) through a connecting block (310). The Kirschner wire hole (300) is a strip-shaped hole. The connecting block (310) slides along the length of the strip-shaped hole and fits into the strip-shaped hole. 10) A first locking component (900) is connected to the guide plate (100), the first locking component (900) being used to lock the connecting block (310) to the guide plate (100); a positioning plate (600) is provided on one side of the guide plate (100), the positioning plate (600) being connected to the guide plate (100) via a connecting rod (500), the positioning plate (600) being used to contact the femoral tibia, the positioning plate (600) and the guide plate (100) being respectively located on both sides of the femoral tibia, the connecting... The connecting rod (500) slides and engages with the guide plate (100) and drives the positioning plate (600) to move closer to or away from the guide plate (100). The guide plate (100) is connected to a second locking component (800). The second locking component (800) is used to lock the connecting rod (500) to the guide plate (100). When the connecting rod (500) is locked to the guide plate (100) by the second locking component (800), the positioning plate (600) contacts the femoral tibia.

2. The multifunctional open-heart surgery guide plate for the knee joint according to claim 1, characterized in that: The first locking component (900) includes an abutment plate (910) and a pusher. The abutment plate (910) is slidably engaged with the connecting block (310), and the pusher is used to push the abutment plate (910) to move and drive the abutment plate (910) to press against the guide plate (100).

3. The multifunctional open-heart surgery guide plate for the knee joint according to claim 2, characterized in that: The abutment plate (910) is connected to a plurality of friction strips (912) near the guide plate (100), and the friction strips (912) are used to contact the guide plate (100).

4. The multifunctional open-heart surgery guide plate for the knee joint according to claim 1, characterized in that: The second locking component (800) includes a positioning block (810) and a moving part. The connecting rod (500) has a limiting hole (521), and the positioning block (810) is used to engage with the limiting hole (521).

5. The multifunctional open-heart surgery guide plate for the knee joint according to claim 4, characterized in that: The moving part is a spring (820), one end of which is connected to the guide plate (100) and the other end of which is connected to the positioning block (810). The spring (820) is used to drive the positioning block (810) to move and drive the positioning block (810) to engage in the limiting hole (521).

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