Auxiliary guide plate device for high tibial osteotomy
The design of the tibial high osteotomy auxiliary guide plate device solves the problem of precise positioning of the osteotomy position in tibial high osteotomy surgery, achieving precise positioning and cost reduction, and is suitable for tibial high osteotomy surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU BOSHI DIGITAL MEDICAL TECH CO LTD
- Filing Date
- 2025-01-24
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, high tibial osteotomy surgery relies on the doctor's experience, making it difficult to accurately locate the osteotomy position. Furthermore, 3D-printed guide plates are costly and time-consuming, limiting their widespread application.
A high tibial osteotomy auxiliary guide plate device was designed, including a measuring component, a first positioning component, and a second positioning component. The osteotomy position is determined by the measuring component, and precise positioning is achieved by the rotational connection of the first and second positioning components, which reduces reliance on the doctor's experience and reduces preparation time and cost.
It enables precise positioning of the osteotomy site, reduces reliance on the doctor's experience, shortens the preparation time from examination to surgery, and reduces costs.
Smart Images
Figure CN224251506U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices, and in particular to an osteotomy auxiliary guide plate device. Background Technology
[0002] In the field of orthopedic surgery, high tibial osteotomy (HTO) is an important surgical method for treating knee osteoarthritis. It involves surgically removing a high tibial bone to restore the alignment of the varus knee joint to normal, thereby relieving knee pain. This is an extra-articular procedure that does not damage any important intra-articular structures, preserving as much of the knee joint's normal mobility as possible; therefore, it is considered a true knee-preserving surgery.
[0003] In the traditional procedure of this surgery, the surgeon must rely on experience to perform osteotomy by manually placing screws, and the treatment effect depends heavily on the surgeon's experience. Currently, a simulated osteotomy approach based on 3D printing technology has emerged. This involves designing an osteotomy guide plate tailored to the patient's specific condition before surgery, which can then be used for the osteotomy procedure during the operation. However, such guide plates are limited by material properties, time, and cost, making their application in various scenarios inconvenient and hindering their widespread adoption. Utility Model Content
[0004] Purpose of the utility model: This solution provides an auxiliary guide plate device for high tibial osteotomy that can accurately locate the osteotomy position.
[0005] Technical solution: This utility model provides a high tibial osteotomy auxiliary guide plate device, comprising:
[0006] The measuring components are selected according to the height between the tibial plateau and the osteotomy site, using a suitable measuring component of appropriate size;
[0007] A first positioning component is movably connected to a measuring component. The first positioning component is provided with a first positioning hole and a first osteotomy channel. The first positioning hole is used to fix a preset position of the first positioning component.
[0008] The second positioning component is rotatably connected to the first positioning component. The second positioning component is provided with a second positioning hole and a second osteotomy channel. The second positioning hole is used to fix the preset position of the second positioning component and to adjust the angle between the second osteotomy channel and the first osteotomy channel.
[0009] In one implementation, the measuring component includes a measuring scale and an alignment end and a connecting end disposed at both ends of the measuring scale. The alignment end is used to align with the tibial plateau, and the connecting end is used to connect with the first positioning component.
[0010] In one implementation, the first positioning component and the measuring component are plugged together, and the first positioning component is provided with a positioning groove that matches the size of the connecting end of the measuring component.
[0011] In one implementation, the upper side of the positioning groove is constructed with a relief groove to accommodate a portion of the measuring tape.
[0012] In one implementation, the first positioning component is provided with a plurality of first positioning holes, through which the first bone needle passes.
[0013] As one implementation, the plane containing all the first positioning holes coincides with the first osteotomy channel.
[0014] In one implementation, the first positioning component and the second positioning component are hinged together, and hinge holes are provided at corresponding positions of the first positioning component and the second positioning component. The hinge holes allow the second bone needle to pass through and form a rotatable connection.
[0015] In one implementation, the second positioning hole allows the third bone needle to pass through, which is used to determine the included angle between the second positioning component and the first positioning component.
[0016] As one implementation, the first positioning component is provided with a plurality of auxiliary positioning holes corresponding to the second positioning hole, such that the angle between the second positioning component and the first positioning component is set within a preset range formed by the auxiliary positioning holes.
[0017] As one implementation, the auxiliary positioning hole allows the angle between the second osteotomy channel on the second positioning component and the horizontal plane to be set at 100-120°.
[0018] Beneficial effects: This invention calculates the osteotomy height based on medical images and selects a measuring component of suitable size. The measuring component determines the position of the first positioning component, and the second positioning component rotates relative to the first positioning component to obtain the second osteotomy channel with the required anterior oblique angle. Compared with freehand osteotomy, this invention can accurately determine the osteotomy position, meet different clinical requirements, and reduce reliance on the surgeon's osteotomy experience. Compared with 3D-printed custom guide plates, this invention can reduce the preparation time from examination to surgery and lower costs. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of the first positioning component. Detailed Implementation
[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0023] In the description of the embodiments of this utility model, it should be noted that the terms "top", "bottom", "horizontal", "vertical", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.
[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.
[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0026] When high tibial osteotomy is required, doctors typically rely on their experience to roughly determine the osteotomy location visually. This often fails to pinpoint the precise location based on the patient's actual knee joint condition, impacting postoperative outcomes. Therefore, this invention provides an auxiliary guide plate device for high tibial osteotomy, comprising a measuring component 100, a first positioning component 200, and a second positioning component 300. For ease of explanation, this embodiment describes the auxiliary guide plate device in conjunction with the structure of a tibial model.
[0027] The measuring component 100 is used to select a measuring component 100 of appropriate size based on the distance between the tibial plateau and the target position. Here, the target position refers to the tibial position at the same height as the osteotomy position. Since the tibial plane and the target osteotomy position are usually not on the same vertical line, the height of the osteotomy position can be indirectly found through the measuring component 100.
[0028] It should be noted that the distance between the tibial plateau and the target location can be obtained based on the patient's preoperative medical images. Preoperatively, medical images of the affected area are acquired, and the osteotomy location is planned. The image distance between the tibial plateau and the target location is calculated from the images, and the actual distance between the two is calculated based on the registration relationship between the images and the actual location. The medical images referred to here can be MRI, CT, etc., without limitation.
[0029] Specifically, the measuring component 100 includes a measuring scale 101 and an alignment end 102 and a connecting end 103 respectively located at both ends of the measuring scale 101. The alignment end 102 is located at the top of the measuring scale 101, and the connecting end 103 is located at the bottom of the measuring scale 101. The top surface of the alignment end 102 is used for alignment with the tibial plateau, and the connecting end 103 is used for connection with the first positioning component 200. It is conceivable that the measuring component 100 can be selected in different sizes (here, size specifically refers to height). Therefore, according to the distance between the tibial plateau and the target position for different patients, a measuring component 100 of a suitable size can be selected for use, facilitating the determination of the fixed position of the first fixation component. Figure 1 As shown, the height of the measuring component 100 selected in this embodiment is 40mm.
[0030] Secondly, the first positioning component 200 is movably connected to the measuring component 100. The first positioning component 200 is provided with a first positioning hole 201, which is used to fix the position of the first positioning component 200. After the measuring component 100 determines the osteotomy height, the first positioning component 200 is connected to it, and the first bone pin 401 passes through the first positioning hole 201 and is fixed in the preset position of the tibial model, thus completing the positioning of the first positioning component 200.
[0031] The number of first positioning holes 201 is set to at least one. When the number of first positioning holes 201 tends to be more, the first positioning component 200 can be further reinforced. In actual operation, the number of first positioning holes 201 used can be selected by comprehensively considering the operation time and reinforcement requirements.
[0032] In this embodiment, there are 3 first positioning holes 201, and the 3 first positioning holes 201 are collinear.
[0033] Furthermore, a first osteotomy channel 206 is constructed on the first positioning component 200 for positioning the first incision for high tibial osteotomy. The first incision is a straight incision parallel to the joint line. Specifically, to save space in the first positioning component 200, the first osteotomy channel 206 can be integrated with the first positioning holes 201, with the lines connecting all the first positioning holes 201 coinciding with the first osteotomy channel. That is, the first positioning holes 201 are distributed at a certain point on the first osteotomy channel 206. After the first positioning component 200 is fixed, the first bone pin 401 can be removed to allow manipulation of the tibial model using the first osteotomy channel 206.
[0034] For example, the measuring component 100 and the first positioning component 200 are connected by a plug-in joint. The first positioning component 200 is provided with a positioning groove 202 that matches the size of the connecting end 103 of the measuring component 100 for plug-in engagement with the connecting end 103. The shape of the connecting end 103 and the positioning groove 202 is not limited, as long as the plug-in engagement can be achieved to connect the measuring component 100 and the first positioning component 200. To improve the stability of the plug-in, the connecting end 103 can be made of a plastic material with a certain degree of elasticity, so as to achieve an interference fit with the positioning groove 202 after plugging in.
[0035] In this embodiment, the connecting end 103 is constructed as a cubic structure, and the positioning groove 202 is constructed as a through hole adapted to it, so that the connecting end 103 can be completely embedded in the through hole. Due to the connection relationship between the connecting end 103 and the measuring scale 101, a clearance groove 203 is also designed on the upper side of the through hole to accommodate part of the measuring scale 101.
[0036] Since the rear side of the first positioning component 200 abuts against the tibia model, and considering the ease of removing the measuring component 100 after the first positioning component 200 is fixed in position, the clearance groove 203 is provided on the front side of the first positioning component 200.
[0037] More specifically, the connecting end 103 is constructed as a cuboid with a long lateral dimension. It can be imagined that since the measuring scale 101 is a component constructed in the longitudinal direction, the long lateral dimension of the connecting end 103 can ensure the stability of the measuring component 100 and the first positioning component 200 after connection, and it is not easy to shake or detach.
[0038] In addition, the second positioning component 300 is rotatably connected to the first positioning component 200. The second positioning component 300 is provided with a second positioning hole 301 and a second osteotomy channel 302. The second positioning hole 301 is used to determine the fixed position of the second positioning component 300, and the second osteotomy channel 302 is used to position the second incision for high tibial osteotomy. The second incision is an anterior oblique incision.
[0039] In one implementation, the first positioning component 200 and the second positioning component 300 are hinged. Hinge holes are provided at corresponding positions of the first positioning component 200 and the second positioning component 300, through which the second bone needle 402 passes to form a rotatable connection. In this embodiment, the first positioning component 200 has a first hinge hole 205 on its left side, and the second positioning component 300 has a second hinge hole on its right side. After aligning the two hinge holes, the second bone needle 402 passes through and is fixed to the tibia model, thus enabling the second positioning component 300 to rotate relative to the first positioning component 200.
[0040] Specifically, the second positioning component 300 is provided with a second positioning hole 301, through which the third bone needle 403 passes to determine the included angle between the second positioning component 300 and the first positioning component 200, and at the same time, the second positioning component 300 can be fixed at a preset position on the tibia.
[0041] To accommodate different anterior oblique osteotomy angles, multiple auxiliary positioning holes 204 corresponding to the second positioning hole 301 are provided on the first positioning component 200, so that the included angle between the second positioning component 300 and the first positioning component 200 is set within a preset range formed by the auxiliary positioning holes 204. After the auxiliary positioning holes 204 and the second positioning hole 301 are aligned, the second bone pin 402 passes through and is fixed to the tibia model, thereby locking the position of the second positioning component 300. Therefore, a suitable auxiliary positioning hole 204 can be found according to the required anterior oblique angle of osteotomy, and the auxiliary positioning hole 204 is used to confirm the angle of the second positioning component 300.
[0042] In this embodiment, three auxiliary positioning holes 204 are constructed on the first positioning component 200. With the hinge hole as the rotation center, the three consecutive auxiliary positioning holes 204 make the angle between the second osteotomy channel 302 and the horizontal plane set at 100-120°. It can be imagined that the three auxiliary positioning holes 204 correspond to angles of 100°, 110° and 120° respectively.
[0043] In this embodiment, before operating on the tibial model, planning, measurement, and design are first performed based on preoperative CT images to determine the distance between the inner edge of the tibial platform and the first positioning hole 201. The image distance is then converted into the actual distance on the tibial model, and a measuring component 100 of appropriate height is selected. Here, the actual distance must be 30mm greater than the theoretical distance, and the model of the steel plate and the screw hole positions of steel plates from different manufacturers are taken into account after osteotomy and expansion.
[0044] During operation, align the alignment end 102 of the measuring component 100 with the inner edge of the tibial plateau of the model. The first positioning component 200 is then inserted into the measuring component 100 and fixed to the tibial model via the first bone pin 401 passing through the first positioning hole 201. At this point, the measuring component 100 can be removed. The first positioning component 200 can be rotated around the first bone pin 401 to fine-tune its position, ensuring accurate positioning of the first osteotomy channel 206. Another first bone pin 401 is inserted, and the position is verified under fluoroscopic X-ray. If unsuitable, the first bone pin 401 is removed, and the positioning is re-established.
[0045] After aligning the hinge holes of the second positioning component 300 and the first positioning component 200, the second bone pin 402 is passed through and fixed to the tibia model. The angle of the second positioning component 300 is adjusted by rotation to find the auxiliary positioning hole 204 corresponding to the appropriate pre-osteotomy angle. The third bone pin 403 is then passed through the second positioning hole 301 and the auxiliary positioning hole 204 for fixation. At this point, the first bone pin of the first positioning component 200 can be removed. The first osteotomy channel 206 on the first positioning component 200 and the second osteotomy channel 302 on the second positioning component 300 serve as references for the final osteotomy incision position.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.
Claims
1. A guide plate device for high tibial osteotomy, characterized in that, include: The measuring components are selected according to the height between the tibial plateau and the osteotomy site, using a suitable measuring component of appropriate size; A first positioning component is movably connected to a measuring component. The first positioning component is provided with a first positioning hole and a first osteotomy channel. The first positioning hole is used to fix a preset position of the first positioning component. The second positioning component is rotatably connected to the first positioning component. The second positioning component is provided with a second positioning hole and a second osteotomy channel. The second positioning hole is used to fix the preset position of the second positioning component and to adjust the angle between the second osteotomy channel and the first osteotomy channel.
2. The tibial high osteotomy auxiliary guide plate device according to claim 1, characterized in that, The measuring component includes a measuring scale and an alignment end and a connecting end located at both ends of the measuring scale. The alignment end is used to align with the tibial plateau, and the connecting end is used to connect with the first positioning component.
3. The tibial high osteotomy auxiliary guide device according to claim 2, characterized in that, The first positioning component and the measuring component are plugged into each other, and the first positioning component is provided with a positioning groove that matches the size of the connecting end of the measuring component.
4. The tibial high osteotomy auxiliary guide plate device according to claim 3, characterized in that, The upper side of the positioning groove has a clearance groove for accommodating part of the measuring tape.
5. The tibial high osteotomy auxiliary guide device according to claim 1, characterized in that, The first positioning component has multiple first positioning holes, through which the first bone needle passes.
6. The tibial high osteotomy auxiliary guide plate device according to claim 5, characterized in that, The plane containing all the first positioning holes coincides with the first osteotomy channel.
7. The tibial high osteotomy auxiliary guide device according to claim 1, characterized in that, The first positioning component and the second positioning component are hinged together, and the corresponding positions of the first positioning component and the second positioning component are provided with hinge holes, which allow the second bone needle to pass through and form a rotatable connection.
8. The tibial high osteotomy auxiliary guide device according to claim 1, characterized in that, The second positioning hole allows the third bone needle to pass through, and is used to determine the included angle between the second positioning component and the first positioning component.
9. The tibial high osteotomy auxiliary guide device according to claim 8, characterized in that, The first positioning component is provided with a plurality of auxiliary positioning holes corresponding to the second positioning hole, such that the included angle between the second positioning component and the first positioning component is set within a preset range formed by the auxiliary positioning holes.
10. The tibial high osteotomy auxiliary guide device according to claim 9, characterized in that, The auxiliary positioning hole sets the angle between the second osteotomy channel on the second positioning component and the horizontal plane to 100-120°.