Tibial extramedullary osteotomy positioning device and method

Abstract

The present application relates to the technical field of medical devices, and in particular to a tibial extramedullary osteotomy positioning device and method. A tibial extramedullary osteotomy positioning device includes a leg frame and a positioning assembly, the positioning assembly includes a positioning frame, a mounting seat, a plurality of positioning plates and a plurality of developing needles, the plurality of positioning plates and the plurality of developing needles are arranged in a one-to-one correspondence, the positioning plate is fixedly arranged on the leg frame, the positioning plate is provided with a mounting hole for installing the corresponding developing needle, a mounting seat is provided on both sides of the leg frame, a mounting plate is provided between the two mounting seats, the mounting plate and the mounting seat are detachably connected, and a multi-directional adjustment assembly capable of adjusting the positioning frame at multiple angles is provided on the mounting plate; a tibial extramedullary osteotomy positioning method, by combining with CT technology, can measure the angle between the tibial shaft and the developing needle, and adjust the positioning frame to the appropriate angle through the multi-directional adjustment assembly to complete the positioning, and the present application has the effect of improving the accuracy of tibial fixation.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a tibial extramedullary osteotomy positioning device and method. Background Art

[0002] Artificial knee replacement is a new technology for treating knee diseases that has gradually developed after the successful application of artificial hip joints in patients in modern times. It can effectively treat late-stage knee pain and improve the quality of life of patients.

[0003] In artificial knee replacement, the upper end of the tibia needs to be osteotomized first to obtain the tibial plane for installing the artificial prosthesis. Before osteotomizing the tibia, the osteotomy angle of the tibial plateau needs to be determined. Therefore, the tibia needs to be accurately positioned. The positioning device in the related technology requires the doctor to locate through visual observation and finally determine the angle of tibial osteotomy, which results in poor positioning accuracy. Summary of the Invention

[0004] In order to improve the positioning accuracy of the patient's tibia, the present application provides a tibial extramedullary osteotomy positioning device and method.

[0005] In the first aspect, the present application provides a tibial extramedullary osteotomy positioning device that adopts the following technical solutions:

[0006] A tibial extramedullary osteotomy positioning device includes a leg frame and a positioning assembly. The positioning assembly includes a positioning frame, a mounting seat, a plurality of positioning plates and a plurality of developing needles. The plurality of positioning plates and the plurality of developing needles are arranged in a one-to-one correspondence. The positioning plate is fixedly set on the leg frame. The positioning plate is provided with mounting holes for installing the corresponding developing needles. The mounting seats are provided on both sides of the leg frame. A mounting plate is provided between the two mounting seats. The mounting plate is detachably connected to the mounting seat. The mounting plate is provided with a multi-directional adjustment assembly that can adjust the positioning frame at multiple angles.

[0007] Before performing surgery on a patient, the patient's tibia needs to be positioned to facilitate the accuracy of osteotomy in subsequent surgery. By adopting the above-mentioned technical solution, the patient's lower limbs are first put on leg and foot frames, and then a CT examination is performed on the patient's lower limbs. The developing needle in this application and the patient's tibial shaft can be formed on the CT film, and the angle between the tibial shaft and the developing needle in the forward and lateral directions in the CT film is measured. Then, during the operation, the mounting plate and the multi-directional adjustment component are installed on the leg frame, and the leg frame is installed on the patient's lower limb. According to the measured angle, the positioning frame is adjusted to the appropriate angle through the multi-directional adjustment component to complete the positioning. The tibial extramedullary osteotomy positioning device in this application is combined with CT technology. On the one hand, it is convenient to adjust the angle of the positioning frame through the multi-directional adjustment component, and on the other hand, it can improve the accuracy of tibial shaft positioning.

[0008] Optionally, the multi-directional adjustment assembly includes a forward adjustment member and a lateral adjustment member; the forward adjustment member includes a first rotating block, a first rotating disk, a first sleeve, and a connecting block, one end of the first rotating block is rotatably connected to the mounting plate, the other end of the first rotating block is fixedly connected to the first sleeve, and the connecting block is provided with a connecting hole that cooperates with the first sleeve;

[0009] The first rotating disk is rotatably connected to the mounting plate, and a plurality of first tooth grooves are spaced apart on one side of the first rotating disk close to the connecting block, and the connecting block is provided with first teeth that cooperate with the first tooth grooves; the lateral adjustment member is provided on the connecting block and can drive the positioning frame to swing back and forth.

[0010] By adopting the above technical solution, the first rotating disk is rotated to a suitable angle according to the angle between the developing needle and the tibial shaft in the CT film. The first rotating disk drives the connecting block to swing, thereby driving the lateral adjustment member to swing, and the lateral adjustment member then drives the positioning frame to swing to a suitable angle.

[0011] Optionally, a limiting sleeve is provided at one end of the first sleeve away from the first rotating block, the limiting sleeve is sleeved on the first sleeve, the connecting block is slidably sleeved on the first sleeve through the connecting hole, a first limiting ring is fixedly provided on the inner wall of the connecting hole close to one end of the first rotating block, a first limiting spring is also sleeved on the first sleeve, one end of the first limiting spring is fixedly connected to the first limiting ring, and the other end of the first limiting spring is fixedly connected to the limiting sleeve.

[0012] By adopting the above technical solution, a first limit spring is provided, which pushes the connecting block to move in the direction of the first rotating turntable, so that the first tooth can be more stably abutted in the corresponding first tooth groove, thereby improving the stability of the positive adjustment member during the adjustment process.

[0013] Optionally, the lateral adjustment member includes a second rotating block, a second sleeve and a second rotating disk, one end of the second rotating block is rotatably connected to the connecting block, the other end of the second rotating block is fixedly connected to the second sleeve, and a rotating sleeve is sleeved on the second sleeve.

[0014] The second rotating disk is rotatably connected to the second rotating block, and a plurality of second tooth grooves are provided at intervals on a side of the second rotating disk close to the rotating sleeve, and the rotating sleeve is provided with second teeth that cooperate with the second tooth grooves;

[0015] The positioning frame includes a positioning rod and a positioning block. One end of the positioning rod is inserted into the second sleeve, and the other end of the positioning rod is fixedly connected to the positioning block.

[0016] By adopting the above technical solution, after the forward adjustment member is adjusted to the appropriate angle, the angle of the lateral adjustment member is adjusted. According to another angle between the developing needle and the tibial shaft in the CT film, the second rotating turntable is adjusted to the appropriate angle. The second rotating turntable drives the rotating sleeve to swing, and the rotating sleeve drives the second sleeve to swing, thereby driving the positioning rod to the appropriate angle.

[0017] Optionally, a height adjustment sleeve is provided at the end of the second sleeve away from the second rotating block, and the height adjustment sleeve is fixedly mounted on the second sleeve. A second limiting ring is provided on the inner wall of the rotating sleeve close to one end of the second sleeve, and a second limiting spring is also provided in the rotating sleeve, one end of the second limiting spring is fixedly connected to the height adjustment sleeve, and the other end of the second limiting spring is fixedly connected to the second limiting ring.

[0018] By adopting the above technical solution and providing the second limit spring, the stability of the second tooth abutting against the second tooth groove is improved, thereby improving the stability of the lateral adjustment member during the adjustment process.

[0019] Optionally, an internal threaded hole is provided on the side wall of the height adjustment sleeve, a locking screw is threaded into the internal threaded hole, a locking groove that cooperates with the locking screw is provided on the positioning rod, and the locking groove is provided along the length direction of the positioning rod.

[0020] By adopting the above technical solution, after the angle of the positioning frame is adjusted to a suitable angle, the height of the positioning rod is adjusted, the depth of the sleeve is increased by adjusting the positioning rod insertion, and then the height of the positioning rod is limited by the cooperation of the locking screw and the locking groove, and then the positioning block is fixed to the tibia, and then the tibial osteotomy operation is performed. The cooperation of the isomorphic locking screw and the locking groove can limit the rotation of the positioning rod in the height adjustment sleeve, further improving the stability and accuracy of the positioning rod.

[0021] Optionally, a mounting groove that cooperates with the mounting plate is provided on the mounting seat, a first positioning hole is provided on the side wall of the mounting groove, a positioning pin is inserted into the first positioning hole, and second positioning holes are provided at both ends of the mounting plate, and the positioning pin and the second positioning hole cooperate to fix the mounting plate.

[0022] By adopting the above technical solution, when installing the mounting plate, the second positioning holes at both ends of the mounting plate are aligned with the first positioning holes on the mounting seat, and then the positioning pins are inserted to fix the mounting plate, thereby improving the stability of the multi-directional adjustment assembly and facilitating the disassembly of the mounting plate.

[0023] Optionally, a plurality of tightening straps and a plurality of buckles are respectively provided on both sides of the leg frame, and the plurality of tightening straps and the plurality of buckles are provided in a one-to-one correspondence, and the tightening straps cooperate with the corresponding buckles.

[0024] By adopting the above technical solution, when the patient wears the leg brace on the lower limbs, the leg brace can be made to fit the patient's lower limbs better and be more stable through the cooperation of the tightening strap and the buckle.

[0025] In a second aspect, the present application provides a tibial extramedullary osteotomy positioning method, using the tibial extramedullary osteotomy positioning device as described above, and adopting the following technical solutions:

[0026] A tibial extramedullary osteotomy positioning method comprises the following steps:

[0027] S1. Before surgery, the patient wears leg braces and secures them securely.

[0028] S2. Perform anteroposterior and lateral CT scans of the patient's lower extremities.

[0029] S3. Based on the CT results in step S2, measure the angle between the patient's tibial shaft and the imaging needle in the anteroposterior and lateral views;

[0030] S4. During surgery, the leg brace in step S1 is worn on the patient's lower limbs, and a multi-directional adjustment component is installed on the leg brace and fixed with a positioning pin;

[0031] S5. According to the angle measured in step S3, the multi-directional adjustment component is adjusted to the corresponding angle;

[0032] S6. Adjust the height of the positioning frame and lock it, fix the positioning block to the patient's tibia, and perform tibial osteotomy.

[0033] By adopting the above-mentioned technical solution, the tibial extramedullary osteotomy positioning device in this application is combined with CT technology, which reduces the error caused by visually measuring the angle. The angle is parameterized during the positioning process, and the angle between the positioning frame and the tibial shaft can be adjusted more accurately, further improving the accuracy of tibial positioning, and can more accurately intercept the tibial plane, facilitating the installation of artificial prostheses.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. The tibial extramedullary osteotomy positioning device in this application is combined with CT technology. On the one hand, it is convenient to adjust the angle of the positioning frame through the multi-directional adjustment component, and on the other hand, it can improve the accuracy of positioning the tibial shaft.

[0036] 2. By providing a first limit spring, the first limit spring pushes the connecting block to move in the direction of the first rotating turntable, so that the first tooth can abut against the corresponding first tooth groove more stably, thereby improving the stability of the positive adjustment member during the adjustment process.

[0037] 3. After the angle of the positioning frame is adjusted to the appropriate angle, adjust the height of the positioning rod, insert the positioning rod to increase the depth of the sleeve, and then use the locking screw and locking groove to limit the height of the positioning rod, then fix the positioning block to the tibia, and then perform the tibial osteotomy operation. The isomorphic locking screw and locking groove can limit the rotation of the positioning rod in the height adjustment sleeve, further improving the stability of the positioning rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the tibial extramedullary osteotomy positioning device in an embodiment of the present application.

[0039] Figure 2 It is a schematic diagram of the exploded structure of part of the structure in the embodiment of the present application.

[0040] Figure 3 It is a schematic diagram of the three-dimensional structure of the multi-directional adjustment component in the embodiment of the present application.

[0041] Figure 4 It is a schematic cross-sectional structural diagram of the first sleeve in the embodiment of the present application.

[0042] Figure 5 It is a schematic diagram of the exploded structure of the connecting block connection structure in an embodiment of the present application.

[0043] Figure 6 It is a schematic cross-sectional structural diagram of the second sleeve in the embodiment of the present application.

[0044] Figure 7 It is a schematic diagram of the exploded structure of the height adjustment sleeve connection structure in the embodiment of the present application.

[0045] Figure numerals: 1, leg frame; 11, receiving groove; 12, tightening belt; 13, buckle; 2, positioning assembly; 21, positioning frame; 211, positioning rod; 2111, locking groove; 212, positioning block; 22, positioning plate; 221, mounting hole; 23, developing needle; 24, mounting seat; 241, mounting groove; 242, first positioning hole; 243, positioning pin; 25, mounting plate; 251, second positioning hole; 252, first rotating hole; 253, fixing plate; 26, ribbed plate; 3, multi-directional adjustment assembly; 31, forward adjustment member; 311, first rotating block; 312, first rotating disk; 3121, first tooth groove; 313, first sleeve; 3131, first section; 314 , connecting block; 3141, connecting hole; 3142, first tooth; 3143, second rotating hole; 3144, connecting plate; 315, limiting sleeve; 3151, first limiting ring; 3152, first limiting surface; 316, first limiting spring; 32, lateral adjustment member; 321, second rotating block; 322, second sleeve; 3221, second section; 323, second rotating disk; 3231, second tooth groove; 324, rotating sleeve; 3241, second tooth; 3242, second limiting ring; 3243, second limiting surface; 325, height adjustment sleeve; 3251, docking groove; 3252, internal threaded hole; 3253, locking screw; 326, second limiting spring. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1 To the attached Figure 7 , further details of this application are given.

[0047] Reference Figure 1 and Figure 2 , a tibial extramedullary osteotomy positioning device, including a leg frame 1, a positioning assembly 2 and a multi-directional adjustment assembly 3, the leg frame 1 has a receiving slot 11 for convenient wearing of the patient's lower limbs, the positioning assembly 2 includes a positioning frame 21, a plurality of positioning plates 22 and a plurality of developing needles 23, a plurality of positioning plates 22 and a plurality of developing needles 23 are arranged in a one-to-one correspondence, in this embodiment, two positioning plates 22 and two developing needles 23 are selected, the positioning plate 22 is fixedly set on the leg frame 1 and the two positioning plates 22 are parallel to each other, and a mounting hole 221 for installing the corresponding developing needle 23 is opened on the positioning plate 22, which is convenient for installing the developing needle 23, and the mounting hole 221 is opened along the length direction of the positioning plate 22. Both sides of the leg frame 1 are provided with a mounting seat 24, and a mounting plate 25 is provided between the two mounting seats 24. Both ends of the mounting plate 25 are detachably connected to the corresponding mounting seat 24, and the multi-directional adjustment assembly 3 is arranged on the mounting plate 25 and can adjust the positioning frame 21 at multiple angles.

[0048] The patient wears the leg and foot frame 1 on the lower limbs of the patient, and a CT examination is performed on the patient's lower limbs. The angle between the tibial shaft and the developing needle 23 in the forward and lateral directions is measured on the CT film, and then the positioning frame 21 is adjusted to the appropriate angle through the multi-directional adjustment component 3 to complete the positioning. The tibial extramedullary osteotomy positioning device in this application is combined with CT technology to improve the accuracy of tibial shaft positioning and facilitate adjustment.

[0049] Reference Figure 1 and Figure 2 The mounting seat 24 is provided with a mounting groove 241 that cooperates with the mounting plate 25, and a first positioning hole 242 is also provided on the side wall of the mounting groove 241. Second positioning holes 251 are provided at both ends of the mounting plate 25, and a positioning pin 243 is inserted into the first positioning hole 242. When installing the multi-directional adjustment component 3, first install the two ends of the mounting plate 25 into the corresponding mounting grooves 241, align the first positioning hole 242 with the second positioning hole 251, and then insert the positioning pin 243 into the second positioning hole 251 to fix the mounting plate 25, thereby improving the stability of the mounting plate 25 and facilitating the disassembly of the mounting plate 25. In addition, the two positioning plates 22 are arranged in a one-to-one correspondence with the two mounting seats 24, and a rib plate 26 is also provided between the mounting seat 24 and the corresponding positioning plate 22. One end of the rib plate 26 is fixedly connected to the positioning plate 22, and the other end of the rib plate 26 is fixedly connected to the positioning plate 22. One side of the rib plate 26 is also fixedly connected to the outer side surface of the leg frame 1. The rib plate 26 forms a whole with the positioning plate 22, the mounting seat 24 and the leg frame 1, thereby enhancing the integrity of the tibial extramedullary osteotomy positioning device.

[0050] Reference Figure 1 There are several tightening straps 12 and several buckles 13 on both sides of the leg and foot frame 1. The several tightening straps 12 and the several buckles 13 are set in one-to-one correspondence. First, the leg and foot frame 1 is installed on the patient's lower limbs, and then the tightening straps 12 are matched with the corresponding buckles 13 to achieve fastening. The leg and foot frame 1 firmly fixes the legs and feet, and utilizes the hinge-like joint characteristics of the ankle joint to improve the stability and repeatability of preoperative measurement and intraoperative fixation.

[0051] Reference Figure 1 The multi-directional adjustment component 3 includes a forward adjustment member 31 and a lateral adjustment member 32. The forward adjustment member 31 can swing the positioning frame 21 back and forth in a plane perpendicular to the length direction of the mounting plate 25, and the lateral adjustment member 32 can swing the positioning frame 21 back and forth in the direction close to the two ends of the mounting plate 25. The forward adjustment member 31 and the lateral adjustment member 32 cooperate to adjust the positioning frame 21 at multiple angles, thereby making it more convenient to adjust the angle of the positioning frame 21.

[0052] Specifically, refer to Figure 3 and Figure 4The forward adjustment member 31 includes a first rotating block 311, a first rotating disk 312, a first sleeve 313 and a connecting block 314. A first rotating hole 252 is provided in the middle of the mounting plate 25. One end of the first rotating block 311 extends into the first rotating hole 252 and is rotatably connected to the inner wall of the first rotating hole 252. The other end of the first rotating block 311 is fixedly connected to the first sleeve 313. The axis of the first rotating block 311 coincides with the axis of the first sleeve 313. A connecting hole 3141 is provided on the connecting block 314 to cooperate with the first sleeve 313. The connecting block 314 is slidably sleeved on the first sleeve 313 through the connecting hole 3141. A fixing plate 253 is fixedly provided in the middle of the mounting plate 25. The fixing plate 253 and the first rotating block 311 are fixedly connected to the first rotating block 311. The fixing plate 253 is arranged at intervals, and the side surface of the fixing plate 253 close to the first rotating block 311 is rotatably connected to the first rotating disk 312. The first rotating disk 312 has a fan-shaped structure, and a plurality of first tooth grooves 3121 are spaced apart on the side of the first rotating disk 312 close to the connecting block 314. The first rotating disk 312 is engraved with scale lines corresponding to the plurality of first tooth grooves 3121, thereby improving the rotation accuracy of the first rotating disk 312. The connecting block 314 is provided with first teeth 3142 that cooperate with the first tooth grooves 3121. When the first rotating disk 312 is rotated, the first rotating disk 312 can drive the connecting block 314 to swing back and forth in a plane perpendicular to the length direction of the mounting plate 25, thereby adjusting the angle between the positioning rod 211 and the positive direction of the tibial shaft.

[0053] In order to enhance the contact strength between the connecting block 314 and the first rotating disk 312, refer to Figure 4 A limiting sleeve 315 is provided at one end of the first sleeve 313 away from the first rotating block 311. The limiting sleeve 315 is fixedly sleeved on the first sleeve 313. A first limiting ring 3151 is fixedly provided on the inner wall of the connecting hole 3141 close to the end of the first rotating block 311. The inner diameter of the connecting hole 3141 is adapted to the outer wall of the limiting sleeve 315, so that the connecting block 314 is sleeved on the limiting sleeve 315 through the first limiting ring 3151. A first limiting spring is also sleeved on the first sleeve 313. 316, the first limit spring 316 is located in the connecting hole 3141, one end of the first limit spring 316 is fixedly connected to the first limit ring 3151, and the other end of the first limit spring 316 is fixedly connected to the end face of the limit sleeve 315. Under the action of the first limit spring 316, the connecting block 314 is always pushed toward the first rotating block 311, so that the first tooth 3142 can stably abut against the corresponding first tooth groove 3121, thereby improving the stability of the swing of the positive adjustment member 31.

[0054] Reference Figure 5The outer side surface of the first sleeve 313 is provided with a first cut surface 3131, and the first limiting ring 3151 is also provided with a first limiting surface 3152. When the connecting block 314 is slidably mounted on the first sleeve 313, the first cut surface 3131 cooperates with the first limiting surface 3152, so that the connecting block 314 can only slide along the length direction of the first sleeve 313, so that under the drive of the first rotating disk 312, the connecting block 314 can only swing back and forth in a plane perpendicular to the length direction of the mounting plate 25.

[0055] Reference Figure 3 and Figure 5 The lateral adjustment member 32 is rotatably arranged on the side of the connecting block 314 away from the first rotating block 311. Specifically, the lateral adjustment member 32 includes a second rotating block 321, a second sleeve 322 and a second rotating disk 323. A second rotating hole 3143 is opened on the connecting block 314. One end of the second rotating block 321 extends into the second rotating hole 3143 and is rotatably connected to the inner wall of the second rotating hole 3143. The other end of the second rotating block 321 is fixedly connected to the second sleeve 322. The axis of the second rotating block 321 coincides with the axis of the second sleeve 322. A rotating sleeve 324 is slidably sleeved on the second sleeve 322. A connecting plate 3144 is fixedly provided on the connecting block 314. The connecting plate 3144 is spaced apart from the second rotating block 321. The connecting plate 3144 is close to the second rotating block 321. The side surface of one side of the second rotating block 321 is rotatably connected to the second rotating disk 323, and the second rotating disk 323 also has a fan-shaped structure. A plurality of second tooth grooves 3231 are spaced apart on the side of the second rotating disk 323 close to the rotating sleeve 324. A second tooth 3241 that cooperates with the second tooth groove 3231 is provided on one end of the rotating sleeve 324 close to the second rotating disk 323, and scale lines corresponding to the plurality of second tooth grooves 3231 are engraved on the second rotating disk 323; the positioning frame 21 includes a positioning rod 211 and a positioning block 212, one end of the positioning rod 211 is inserted into the second sleeve 322, and the other end of the positioning rod 211 is fixedly connected to the positioning block 212. When the positioning rod 211 is adjusted to a suitable angle, the positioning block 212 is fixedly connected to the tibia, thereby completing the tibia positioning.

[0056] Reference Figure 3 and 6A height-adjusting sleeve 325 is provided at one end of the second sleeve 322 away from the second rotating block 321. The height-adjusting sleeve 325 is partially fixedly sleeved on the second sleeve 322. In order to facilitate the insertion of the positioning rod 211 into the second sleeve 322, a docking groove 3251 is provided on the inner wall of the height-adjusting sleeve 325 for cooperating with the second sleeve 322, so that the inner wall of the second sleeve 322 is flush with the inner wall of the height-adjusting sleeve 325. In order to improve the abutment strength between the rotating sleeve 324 and the second rotating disk 323, a second limiting ring 3242 is provided on the inner wall of the rotating sleeve 324 near one end of the second sleeve 322, and a second limiting spring 326 is also provided in the rotating sleeve 324. One end of the second limiting spring 326 is fixedly connected to the height adjustment sleeve 325, and the other end of the second limiting spring 326 is fixedly connected to the second limiting ring 3242. Under the action of the second limiting spring 326, the second tooth 3241 can abut more stably in the second tooth groove 3231, thereby improving the stability of the lateral adjustment member 32.

[0057] In order to limit the rotation between the rotating sleeve 324 and the second sleeve 322, refer to Figure 7 The outer side surface of the second sleeve 322 is provided with a second cut surface 3221, and the second limiting ring 3242 is also provided with a second limiting surface 3243 that cooperates with the second cut surface 3221. When the rotating sleeve 324 is sleeved on the second sleeve 322, the second cut surface 3221 abuts against the second limiting surface 3243, so that under the action of the second rotating disk 323, the rotating sleeve 324 can only swing along the length direction of the mounting plate 25.

[0058] Reference Figure 6 and Figure 7 When the locking cam 3253 is in the unlocking state, the locking cam 3253 can be locked to the unlocking state, so that the unlocking cam 3253 can be unlocked.

[0059] The implementation principle of the embodiment of the present application is as follows: after the patient's lower limbs are put on the leg and foot frame 1 and tightened, a CT scan is taken of the patient's lower limbs, and the angle between the patient's tibial shaft and the imaging needle 23 in the forward and lateral directions is measured on the CT film. According to the measured angle, the forward adjustment member 31 is used to adjust the angle between the positioning rod 211 and the tibia in the forward direction, and the lateral adjustment member 32 is used to adjust the angle between the positioning rod 211 and the tibia in the lateral direction to complete the positioning of the positioning rod 211. Finally, the positioning block 212 is fixedly connected to the tibia and the osteotomy is started. The present application is combined with CT technology to accurately locate the angle between the tibial shaft and the positioning rod 211, thereby improving the accuracy of tibia positioning, and through the multi-directional adjustment component 3, the angle of the positioning rod 211 can be adjusted at multiple angles, which is convenient for adjusting the positioning rod 211 during the positioning process.

[0060] The present application also discloses a method for positioning tibial extramedullary osteotomy, which uses the above-mentioned tibial extramedullary osteotomy positioning device and includes the following steps:

[0061] S1. Before surgery, the patient's lower limbs are worn on the leg frame 1 and fastened with the tightening strap 12 and the buckle 13;

[0062] S2. Perform anteroposterior and lateral CT scans of the patient's lower extremities.

[0063] S3. According to the CT results in step S2, the angle between the patient's tibial shaft and the imaging needle 23 in the anteroposterior and lateral positions is measured;

[0064] S4. During surgery, the leg stand 1 in step S1 is worn on the patient's lower limbs, and the multi-directional adjustment assembly 3 is installed on the leg stand 1 and fixed with a positioning pin 243;

[0065] S5. According to the angle measured in step S3, the positioning rod 211 is adjusted to a suitable angle by the multi-directional adjustment assembly 3;

[0066] S6. Adjust the height of the positioning rod 211 and lock it, fix the positioning block 212 to the patient's tibia, and perform tibial osteotomy to obtain a tibial plane for installing the artificial prosthesis.

[0067] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A tibial extramedullary osteotomy positioning device, characterized in that: The invention comprises a leg frame (1) and a positioning assembly (2), wherein the positioning assembly (2) comprises a positioning frame (21), a mounting seat (24), a plurality of positioning plates (22) and a plurality of developing needles (23), wherein the plurality of positioning plates (22) and the plurality of developing needles (23) are arranged in a one-to-one correspondence, wherein the positioning plate (22) is fixedly arranged on the leg frame (1), and the positioning plate (22) is provided with a mounting hole (221) for mounting the corresponding developing needle (23), the mounting seats (24) are arranged on both sides of the leg frame (1), a mounting plate (25) is arranged between the two mounting seats (24), the mounting plate (25) is detachably connected to the mounting seat (24), and the mounting plate (25) is provided with a multi-directional adjustment assembly (3) capable of adjusting the positioning frame (21) at multiple angles; The multi-directional adjustment assembly (3) comprises a forward adjustment member (31) and a lateral adjustment member (32); the forward adjustment member (31) comprises a first rotating block (311), a first rotating disk (312), a first sleeve (313) and a connecting block (314); one end of the first rotating block (311) is rotatably connected to the mounting plate (25); the other end of the first rotating block (311) is fixedly connected to the first sleeve (313); the connecting block (314) is provided with a connecting member connected to the first sleeve (313); 13) matching connecting hole (3141); the first rotating disk (312) is rotatably connected to the mounting plate (25); a plurality of first tooth grooves (3121) are spaced apart on one side of the first rotating disk (312) close to the connecting block (314); the connecting block (314) is provided with first teeth (3142) matching the first tooth grooves (3121); the lateral adjustment member (32) is provided on the connecting block (314) and can drive the positioning frame (21) to swing back and forth; The lateral adjustment member (32) comprises a second rotating block (321), a second sleeve (322) and a second rotating disk (323). One end of the second rotating block (321) is rotatably connected to the connecting block (314). The other end of the second rotating block (321) is fixedly connected to the second sleeve (322). A rotating sleeve (324) is sleeved on the second sleeve (322). A connecting plate (3144) is fixedly provided on the connecting block (314). The side surface of the connecting plate (3144) close to the second rotating block (321) is connected to the connecting plate (3144). The second rotating disk (323) is rotatably connected, and a plurality of second tooth grooves (3231) are spaced apart on one side of the second rotating disk (323) close to the rotating sleeve (324), and the rotating sleeve (324) is provided with second teeth (3241) that cooperate with the second tooth grooves (3231); the positioning frame (21) includes a positioning rod (211) and a positioning block (212), one end of the positioning rod (211) is inserted into the second sleeve (322), and the other end of the positioning rod (211) is fixedly connected to the positioning block (212).

2. The tibial extramedullary osteotomy positioning device according to claim 1, characterized in that: A limiting sleeve (315) is provided at one end of the first sleeve (313) away from the first rotating block (311), and the limiting sleeve (315) is sleeved on the first sleeve (313). The connecting block (314) is slidably sleeved on the first sleeve (313) through the connecting hole (3141). A first limiting ring (3151) is fixedly provided on the inner wall of the connecting hole (3141) near one end of the first rotating block (311). A first limiting spring (316) is also sleeved on the first sleeve (313), one end of the first limiting spring (316) is fixedly connected to the first limiting ring (3151), and the other end of the first limiting spring (316) is fixedly connected to the limiting sleeve (315).

3. The tibial extramedullary osteotomy positioning device according to claim 1, characterized in that: A height adjustment sleeve (325) is provided at one end of the second sleeve (322) away from the second rotating block (321), and the height adjustment sleeve (325) is fixedly sleeved on the second sleeve (322). A second limiting ring (3242) is provided on the inner wall of the rotating sleeve (324) close to one end of the second sleeve (322). A second limiting spring (326) is also provided in the rotating sleeve (324), one end of the second limiting spring (326) is fixedly connected to the height adjustment sleeve (325), and the other end of the second limiting spring (326) is fixedly connected to the second limiting ring (3242).

4. The tibial extramedullary osteotomy positioning device according to claim 3, characterized in that: An internal threaded hole (3252) is provided on the side wall of the height adjustment sleeve (325), a locking screw (3253) is screwed into the internal threaded hole (3252), and a locking groove (2111) is provided on the positioning rod (211) to cooperate with the locking screw (3253), and the locking groove (2111) is provided along the length direction of the positioning rod (211).

5. The tibial extramedullary osteotomy positioning device according to claim 1, characterized in that: The mounting seat (24) is provided with a mounting groove (241) that cooperates with the mounting plate (25); a first positioning hole (242) is provided on a side wall of the mounting groove (241); a positioning pin (243) is inserted into the first positioning hole (242); second positioning holes (251) are provided at both ends of the mounting plate (25); the positioning pin (243) and the second positioning hole (251) cooperate to fix the mounting plate (25).

6. The tibial extramedullary osteotomy positioning device according to claim 1, characterized in that: A plurality of tightening belts (12) and a plurality of buckles (13) are respectively provided on both sides of the leg stand (1), and the plurality of tightening belts (12) and the plurality of buckles (13) are provided in a one-to-one correspondence, and the tightening belts (12) cooperate with the corresponding buckles (13).

Images