Tibial osteotomy measuring device

Abstract

The application provides a tibial osteotomy measuring device, which comprises: a valgus angle measuring member and a base plate cooperatively showing a valgus angle; a first end of a first measuring member can be matched with the lowest part of the medial tibia, a second end of the first measuring member is movably arranged in a first sliding seat, and a middle part of the first measuring member is movably arranged in a first guide groove; a lateral osteotomy depth measuring mechanism and a medial osteotomy depth measuring mechanism are arranged at intervals, a first end of a second measuring member can be matched with the lowest part of the lateral tibia, a second end of the second measuring member is movably arranged in the first sliding seat, and a middle part of the second measuring member is movably arranged in the first guide groove; the medial osteotomy depth measuring mechanism and the lateral osteotomy depth measuring mechanism are driven and matched with the valgus angle measuring member. The technical scheme of the application effectively solves the problem that the osteotomy measuring scale in the related art cannot simultaneously indicate the valgus angle and the medial and lateral osteotomy depth.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of osteotomy measuring ruler, in particular to a tibial osteotomy measuring device. BACKGROUND

[0002] In total knee arthroplasty surgery, the osteotomy operation on the tibial side is one of the most important links. The method in the prior art usually relies on the experience of the operator, and the measurement and adjustment of each parameter such as the valgus angle, the osteotomy depth and the osteotomy width of the tibia are independent operation steps.

[0003] At present, the commonly used knee tibial osteotomy method in the clinic mainly includes the following points:

[0004] 1. Positioning reference base point selection: The osteotomy of the tibial side is usually based on the tibia as the reference, and the position of the osteotomy plane is preliminarily set by the experience of the operator. However, the accuracy and reliability of this method are limited for patients with varus and valgus deformities and lateral bone defects.

[0005] 2. Osteotomy depth measurement: The operator usually uses a probe to measure the lowest position of the joint, and determines the depth required for tibial osteotomy based on this. Although this method can provide a certain reference value, it does not take into account the problem that the osteotomy depth may be different at different positions, especially in the case of knee deformity, a single depth of osteotomy often cannot meet the needs of precise osteotomy.

[0006] 3. Valgus angle adjustment: The valgus angle of the tibia after osteotomy is an important factor affecting the postoperative recovery of the knee joint function. The adjustment method in the prior art lacks accurate measuring tools, which may result in the valgus angle after osteotomy not meeting the expected value, affecting the rehabilitation effect of the patient.

[0007] 4. Limitations of measuring tools: Traditional osteotomy measuring tools can only measure the osteotomy depth or the valgus angle, and cannot measure the osteotomy depth and the valgus angle at the same time. SUMMARY

[0008] The main purpose of the present application is to provide a tibial osteotomy measuring device to solve the problem that the osteotomy measuring ruler in the related art cannot simultaneously indicate the valgus angle and the medial and lateral osteotomy depth.

[0009] In order to achieve the above object, according to one aspect of the present application, there is provided a tibial osteotomy measuring device, comprising: a base plate; a valgus angle measuring member hingedly connected with the base plate to show a valgus angle together with the base plate, the valgus angle measuring member being provided with a first guide slot; a medial osteotomy depth measuring mechanism, comprising a first sliding seat movably arranged on the base plate in a direction from a medial side of a tibia to a lateral side of the tibia, and a first measuring member, a first end of the first measuring member being capable of being fitted with a lowest point of the medial side of the tibia, a second end of the first measuring member being reciprocally movably arranged in the first sliding seat in a direction from a distal end of the tibia to a proximal end of the tibia, and a middle part of the first measuring member being movably arranged in the first guide slot; and a lateral osteotomy depth measuring mechanism, arranged in a spaced manner with the medial osteotomy depth measuring mechanism, the lateral osteotomy depth measuring mechanism comprising a second sliding seat movably arranged on the base plate in the direction from the medial side of the tibia to the lateral side of the tibia, and a second measuring member, a first end of the second measuring member being capable of being fitted with a lowest point of the lateral side of the tibia, a second end of the second measuring member being reciprocally movably arranged in the first sliding seat in the direction from the distal end of the tibia to the proximal end of the tibia, and a middle part of the second measuring member being movably arranged in the first guide slot; wherein the medial osteotomy depth measuring mechanism and the lateral osteotomy depth measuring mechanism are drivingly matched with the valgus angle measuring member.

[0010] Further, the first sliding seat is provided with a slot extending in the direction from the distal end of the tibia to the proximal end of the tibia, and the first measuring member is movably inserted in the slot.

[0011] Further, the base plate is provided with a second guide slot, and the first sliding seat and the second sliding seat are movably arranged in the second guide slot.

[0012] Further, the first measuring member comprises a first measuring plate movably arranged on the first sliding seat in the direction from the distal end of the tibia to the proximal end of the tibia, and a first probe rod, a first end of the first probe rod being capable of being moved to be fitted with the lowest point of the medial side of the tibia, and a second end of the first probe rod being connected with the first measuring plate.

[0013] Further, the second measuring member comprises a second measuring plate movably arranged on the second sliding seat in the direction from the distal end of the tibia to the proximal end of the tibia, and a second probe rod, a first end of the second probe rod being capable of being moved to be fitted with the lowest point of the lateral side of the tibia, and a second end of the second probe rod being connected with the second measuring plate.

[0014] Further, the valgus angle measuring member comprises a first mounting plate hingedly connected with the base plate, and a third measuring plate arranged at an end of the first mounting plate, the first guide slot being arranged on the first mounting plate, and the third measuring plate being provided with a valgus angle indicating scale, the base plate having an indicating part indicating matched with the valgus angle indicating scale to show the valgus angle.

[0015] Further, the first sliding seat comprises a second mounting plate and a plurality of guide rods arranged on the second mounting plate, a slot is arranged on the second mounting plate, and the plurality of guide rods are arranged in the second guide slot.

[0016] Further, a first mounting through hole is arranged on the first probe rod for penetrating the first external fixing member, and the first external fixing member is arranged in the first mounting through hole and connected with the tibia.

[0017] Further, a bone-cutting width indicating scale is arranged on the base plate and extends along the length direction of the base plate.

[0018] Further, a plurality of mounting groups are arranged on the base plate, each mounting group comprises two second mounting through holes arranged at intervals, the tibia bone-cutting device is fixed to the tibia through one mounting group, and / or the tibia bone-cutting measuring device further comprises a connecting member, the connecting member comprises a connecting sleeve and a connecting nail, a first connecting hole is arranged on the base plate, a second connecting hole is arranged on the eversion angle measuring member, the connecting sleeve is arranged in the first connecting hole and the second connecting hole, a stepped portion is arranged on the connecting nail, the connecting sleeve is arranged on the side of the base plate away from the eversion angle measuring member and is attached to the base plate, and the stepped portion is arranged on the side of the eversion angle measuring member away from the base plate and is attached to the eversion angle measuring member.

[0019] By using the technical scheme of the present application, the tibia bone-cutting measuring device comprises a base plate, an eversion angle measuring member, an inner side bone-cutting depth measuring mechanism and an outer side bone-cutting depth measuring mechanism. The eversion angle measuring member is hingedly connected with the base plate, so that the inner side bone-cutting depth measuring mechanism and the outer side bone-cutting depth measuring mechanism can drive the eversion angle measuring member to rotate relative to the base plate, thereby achieving the indication of the eversion angle. The middle part of the first measuring member is movably arranged in the first guide slot, and the middle part of the second measuring member is movably arranged in the first guide slot, so that when the first measuring member and the second measuring member move, the eversion angle measuring member can be driven to rotate relative to the base plate. The first sliding seat and the second sliding seat can move relative to the base plate, so that the first sliding seat can drive the first measuring member to move along the direction from the inner side of the tibia to the outer side of the tibia, and the second sliding seat can drive the second measuring member to move along the direction from the inner side of the tibia to the outer side of the tibia, so as to facilitate the first measuring member to be attached to the lowest part of the inner side of the tibia and the second measuring member to be attached to the lowest part of the outer side of the tibia. The second end of the first measuring member can move in the first sliding seat, so that the relative position between the first measuring member and the first sliding seat can be changed, the second end of the second measuring member can move in the second sliding seat, so that the relative position between the second measuring member and the second sliding seat can be changed, and thus when the first sliding seat and the second sliding seat slide on the base plate, the eversion angle measuring member can rotate relative to the base plate. Therefore, the technical scheme of the present application effectively solves the problem that the bone-cutting measuring ruler in the related art cannot simultaneously indicate the eversion angle and the inner and outer side bone-cutting depth. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 A schematic diagram of a three-dimensional structure of an embodiment of the tibial osteotomy measuring device according to the present invention is shown;

[0022] Figure 2 It shows Figure 1 A first-view three-dimensional structural diagram of the tibial osteotomy measuring device;

[0023] Figure 3 It shows Figure 1 A two-dimensional structural diagram of the tibial osteotomy measuring device from a second perspective;

[0024] Figure 4 It shows Figure 1 A three-dimensional structural diagram of the medial osteotomy depth measuring mechanism of the tibial osteotomy measuring device;

[0025] Figure 5 It shows Figure 4 A cross-sectional schematic diagram of the medial osteotomy depth measurement mechanism;

[0026] Figure 6 It shows Figure 1 A three-dimensional structural diagram of the connector of the tibial osteotomy measuring device;

[0027] Figure 7 It shows Figure 1 A front view schematic diagram of the eversion angle measuring component of the tibial osteotomy measuring device;

[0028] Figure 8 It shows Figure 1 A front view schematic diagram of the base plate of the tibial osteotomy measuring device.

[0029] The above figures include the following reference numerals:

[0030] 10, base plate; 11, second guide slot; 12, indicating part; 13, osteotomy width indicating scale; 14, mounting group; 141, second mounting through hole; 15, first connecting hole; 20, eversion angle measuring member; 21, first guide slot; 22, first mounting plate; 23, third measuring plate; 231, eversion angle indicating scale; 24, second connecting hole; 30, medial osteotomy depth measuring mechanism; 31, first sliding seat; 311, insertion slot; 312, second mounting plate; 313, guide rod; 32, first measuring member; 321, first measuring plate; 322, first probe rod; 3221, first mounting through hole; 40, lateral osteotomy depth measuring mechanism; 41, second sliding seat; 42, second measuring member; 421, second measuring plate; 422, second probe rod; 50, connecting member; 51, connecting sleeve; 52, connecting nail; 521, stepped portion. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to limit the present application and its applications or uses in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort fall within the scope of the present application.

[0032] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values set forth herein are not limiting. It should be understood that the various parts shown in the drawings are not necessarily drawn to scale in proportion. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely illustrative, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] As shown in Figure 1 and Figure 3 , the tibial osteotomy measuring device of the embodiment comprises a base plate 10, an eversion angle measuring piece 20, a medial osteotomy depth measuring mechanism 30 and a lateral osteotomy depth measuring mechanism 40. The eversion angle measuring piece 20 is hingedly connected with the base plate 10 to jointly show the eversion angle with the base plate 10, and a first guide groove 21 is arranged on the eversion angle measuring piece 20. The medial osteotomy depth measuring mechanism 30 comprises a first sliding seat 31 and a first measuring piece 32, the first sliding seat 31 is movably arranged on the base plate 10 in the direction from the medial side of the tibia to the lateral side of the tibia, the first end of the first measuring piece 32 is capable of abuttingly fitting with the lowest part of the medial side of the tibia, the second end of the first measuring piece 32 is reciprocally movably arranged on the first sliding seat 31 in the direction from the distal end of the tibia to the proximal end of the tibia, and the middle part of the first measuring piece 32 is movably arranged in the first guide groove 21. The lateral osteotomy depth measuring mechanism 40 is arranged in a spaced manner with the medial osteotomy depth measuring mechanism 30, the lateral osteotomy depth measuring mechanism 40 comprises a second sliding seat 41 and a second measuring piece 42, the second sliding seat 41 is movably arranged on the base plate 10 in the direction from the medial side of the tibia to the lateral side of the tibia, the first end of the second measuring piece 42 is capable of abuttingly fitting with the lowest part of the lateral side of the tibia, the second end of the second measuring piece 42 is reciprocally movably arranged on the second sliding seat 41 in the direction from the distal end of the tibia to the proximal end of the tibia, and the middle part of the second measuring piece 42 is movably arranged in the first guide groove 21. Wherein, the medial osteotomy depth measuring mechanism 30 and the lateral osteotomy depth measuring mechanism 40 are drivingly matched with the eversion angle measuring piece 20.

[0035] The tibial osteotomy measuring device includes a base plate 10, an eversion angle measuring piece 20, a medial osteotomy depth measuring mechanism 30, and a lateral osteotomy depth measuring mechanism 40. The eversion angle measuring piece 20 is hingedly connected to the base plate 10, so that the medial osteotomy depth measuring mechanism 30 and the lateral osteotomy depth measuring mechanism 40 can drive the eversion angle measuring piece 20 to rotate relative to the base plate 10, thereby enabling the eversion angle to be shown. The middle part of the first measuring piece 32 is movably arranged in the first guide groove 21, and the middle part of the second measuring piece 42 is movably arranged in the first guide groove 21, so that when the first measuring piece 32 and the second measuring piece 42 move, the eversion angle measuring piece 20 can be driven to rotate relative to the base plate 10. The first sliding seat 31 and the second sliding seat 41 can move relative to the base plate 10, and the first sliding seat 31 can drive the first measuring piece 32 to move in the direction from the medial side of the tibia to the lateral side of the tibia, and the second sliding seat 41 can drive the second measuring piece 42 to move in the direction from the medial side of the tibia to the lateral side of the tibia, so as to facilitate the first measuring piece 32 to be attached to the lowest part of the medial side of the tibia, and the second measuring piece 42 to be attached to the lowest part of the lateral side of the tibia. The second end of the first measuring piece 32 can move in the first sliding seat 31, so that the relative position between the first measuring piece 32 and the first sliding seat 31 can be changed, and the second end of the second measuring piece 42 can move in the second sliding seat 41, so that the relative position between the second measuring piece 42 and the second sliding seat 41 can be changed, and when the first sliding seat 31 and the second sliding seat 41 slide on the base plate 10, the eversion angle measuring piece 20 can rotate relative to the base plate 10. Therefore, the technical solution of the embodiment effectively solves the problem that the osteotomy measuring ruler in the related art cannot simultaneously indicate the eversion angle and the medial and lateral osteotomy depth.

[0036] It should be noted that the first sliding seat 31 can move in the direction from the lateral side of the tibia to the medial side of the tibia.

[0037] The first measuring piece 32 can move in the direction from the proximal end of the tibia to the distal end of the tibia.

[0038] The second sliding seat 41 can move in the direction from the lateral side of the tibia to the medial side of the tibia.

[0039] The second measuring piece 42 can move in the direction from the proximal end of the tibia to the distal end of the tibia.

[0040] As shown in Figure 2 and Figure 4 In the embodiment, the first sliding seat 31 is provided with a slot 311 extending in the direction from the distal end of the tibia to the proximal end of the tibia, and the first measuring piece 32 is movably inserted into the slot 311. The slot 311 is arranged to facilitate the first measuring piece 32 to slide in the first sliding seat 31 in the direction from the distal end of the tibia to the proximal end of the tibia, thereby enabling the eversion angle measuring piece 20 to rotate relative to the base plate 10.

[0041] It should be noted that the slot 311 can be a U-shaped slot or a rectangular slot. In the embodiment, the slot 311 is a U-shaped slot.

[0042] As shown in Figure 1 and Figure 2 In the embodiment, a second guide slot 11 is arranged on the substrate 10, and the first sliding seat 31 and the second sliding seat 41 are movably arranged in the second guide slot 11. The second guide slot 11 can guide the movement of the first sliding seat 31 and the second sliding seat 41, so that the first sliding seat 31 and the second sliding seat 41 can move in the direction from the medial side of the tibia to the lateral side of the tibia.

[0043] As shown in Figure 2 and Figure 4 In the embodiment, the first measuring member 32 includes a first measuring plate 321 and a first probe rod 322. The first measuring plate 321 is movably arranged on the first sliding seat 31 in the direction from the distal end of the tibia to the proximal end of the tibia, and the first end of the first probe rod 322 can be moved to fit the lowest point of the medial side of the tibia. The second end of the first probe rod 322 is connected to the first measuring plate 321. When the first end of the first probe rod 322 slides on the tibia, because the surface of the tibia is a curved surface, the first end of the first probe rod 322 can move in the direction from the distal end of the tibia to the proximal end of the tibia along with the change of the surface of the tibia, and then the first probe rod 322 can drive the first measuring plate 321 to move on the first sliding seat 31 in the direction from the distal end of the tibia to the proximal end of the tibia.

[0044] It should be noted that the structure of the lateral osteotomy depth measuring mechanism 40 is similar to that of the medial osteotomy depth measuring mechanism 30. Specifically, the second sliding seat 41 is similar in structure to the first sliding seat 31. The second measuring member 42 is similar in structure to the first measuring member 32.

[0045] Specifically, the length of the first measuring plate 321 of the second measuring member 42 is different from that of the first measuring plate 321 of the first measuring member 32.

[0046] The middle part of the first probe rod 322 is protruding, so that the first probe rod 322 can avoid the femur and avoid interference between the first probe rod 322 and the femur.

[0047] The first measuring plate 321 is provided with an osteotomy depth indicating scale. The osteotomy depth indicating scale on the first measuring plate 321 of the first measuring member 32 is a medial osteotomy depth indicating scale, and the osteotomy depth indicating scale on the first measuring plate 321 of the second measuring member 42 is a lateral osteotomy depth indicating scale.

[0048] As shown in Figure 1 and Figure 2As shown in the figure, in the embodiment, the second measuring member 42 comprises a second measuring plate 421 and a second probe rod 422, the second measuring plate 421 is movably arranged on the second sliding seat 41 in the direction from the distal end of the tibia to the proximal end of the tibia, and the first end of the second probe rod 422 is capable of moving to fit the lowest part of the lateral side of the tibia, and the second end of the second probe rod 422 is connected with the second measuring plate 421. When the first end of the second probe rod 422 slides on the tibia, due to the fact that the surface of the tibia is a curved surface, the first end of the second probe rod 422 is capable of moving in the direction from the distal end of the tibia to the proximal end of the tibia along with the change of the surface of the tibia, and then the second probe rod 422 is capable of moving the second measuring plate 421 on the second sliding seat 41 in the direction from the distal end of the tibia to the proximal end of the tibia.

[0049] As shown in the figure, Figure 2 and Figure 7 As shown in the figure, in the embodiment, the valgus angle measuring member 20 comprises a first mounting plate 22 which is hingedly connected with the base plate 10, and a third measuring plate 23 which is arranged at the end of the first mounting plate 22, the first guide slot 21 is arranged on the first mounting plate 22, the third measuring plate 23 is provided with a valgus angle indicating scale 231, and the base plate 10 is provided with an indicating part 12 which cooperates with the valgus angle indicating scale 231 to show the valgus angle. The first mounting plate 22 is hingedly connected with the base plate 10, so that the first mounting plate 22 is capable of rotating relative to the base plate 10, and then the first mounting plate 22 is capable of rotating the third measuring plate 23 relative to the base plate 10, and then the position of the valgus angle indicating scale 231 relative to the base plate 10 can be changed, and then the indicating part 12 can show the valgus angle together with the valgus angle indicating scale 231.

[0050] It should be noted that, in the embodiment, the indicating part 12 is an indicating plate.

[0051] In other embodiments, the indicating part 12 is an indicating rod, and can also be an indicating needle.

[0052] The third measuring plate 23 is a sector plate.

[0053] As shown in the figure, Figure 2 and Figure 4 As shown in the figure, in the embodiment, the first sliding seat 31 comprises a second mounting plate 312 and a plurality of guide rods 313 which are arranged on the second mounting plate 312 in a spaced manner, and the insertion slot 311 is arranged on the second mounting plate 312, the plurality of guide rods 313 are all arranged in the second guide slot 11, and the guide rod 313 cooperates with the second guide slot 11 in a guide manner. The plurality of guide rods 313 not only can cooperate with the second guide slot 11 in a guide manner, but also can avoid the rotation of the guide rod 313, the second mounting plate 312 and the first probe rod 322 relative to the base plate 10 when one guide rod 313 is arranged, and then the measurement of the medial cut bone depth, the lateral cut bone depth and the valgus angle can be avoided.

[0054] As shown in the figure,Figure 5 As shown in the figure, in the embodiment, the first probe rod 322 is provided with a first mounting through hole 3221 for penetrating a first external fixing member, and the first external fixing member penetrates the first mounting through hole 3221 and is connected with the tibia. The first external fixing member can penetrate the first mounting through hole 3221 and be connected with the tibia, so that the relative position of the first probe rod 322 and the tibia can be fixed after the valgus angle, the medial osteotomy depth and the lateral osteotomy depth are adjusted.

[0055] It should be noted that the first external fixing member is a Kirschner wire.

[0056] As shown in the figure, Figure 1 and Figure 8 As shown in the figure, in the embodiment, the substrate 10 is provided with an osteotomy width indicating scale 13 extending along the length direction of the substrate 10. The osteotomy width indicating scale 13 can be used to determine the osteotomy width.

[0057] As shown in the figure, Figure 2 , Figure 3 and Figure 8 As shown in the figure, in the embodiment, the substrate 10 is provided with a plurality of mounting groups 14 spaced apart, each mounting group 14 includes two second mounting through holes 141 spaced apart, and two second external fixing members penetrate the two second mounting through holes 141 of one mounting group 14 respectively and are connected with the tibia. The two second external fixing members can be used to fix the substrate 10 to the tibia. When the valgus angle, the medial osteotomy depth and the lateral osteotomy depth are determined, according to the relative position of the tibial osteotomy measuring device and the tibia and the tibial osteotomy device used when the osteotomy is performed, a suitable mounting group 14 is selected, the two second external fixing members are fixed to the tibia through the mounting group 14, and the tibial osteotomy device is installed to the two second external fixing members. The valgus angle, the medial osteotomy depth and the lateral osteotomy depth are the required valgus angle, medial osteotomy depth and lateral osteotomy depth after the osteotomy is performed using the tibial osteotomy device, which facilitates the osteotomy of the tibial osteotomy device.

[0058] The second external fixing member is a fixation pin, of course, it can also be a Kirschner wire.

[0059] Among the plurality of mounting groups 14, two adjacent mounting groups 14 are a first mounting group and a second mounting group, one second mounting through hole 141 of the second mounting group is located between the two second mounting through holes 141 of the first mounting group, and the other second mounting through hole 141 of the second mounting group is located outside the two second mounting through holes 141 of the first mounting group.

[0060] A plurality of third mounting through holes are arranged on the second mounting plate 312, and the plurality of third mounting through holes are arranged in one-to-one correspondence with the plurality of guide rods 313, and the guide rods 313 are arranged in the third mounting through holes. A first blocking ring is arranged on the outer circumferential surface of the end of the guide rod 313 away from the second mounting plate 312, and the substrate 10 is located between the first blocking ring and the second mounting plate 312.

[0061] A second blocking ring is arranged on the first probe rod 322, and the valgus angle measuring member 20 is clamped between the second blocking ring and the first measuring plate 321.

[0062] As shown in Figure 2 and Figure 6 In the present embodiment, the tibial osteotomy measuring device further comprises a connecting member 50, the connecting member 50 comprises a connecting sleeve 51 and a connecting pin 52, the first connecting hole 15 is arranged on the substrate 10, the second connecting hole 24 is arranged on the valgus angle measuring member 20, the connecting sleeve 51 is arranged in the first connecting hole 15 and the second connecting hole 24, the connecting pin 52 is provided with a stepped portion 521, the connecting sleeve 51 is located on the side of the substrate 10 away from the valgus angle measuring member 20 and is attached to the substrate 10, and the stepped portion 521 is located on the side of the valgus angle measuring member 20 away from the substrate 10 and is attached to the valgus angle measuring member 20. The connecting sleeve 51 can pass through the first connecting hole 15 and the second connecting hole 24, thereby connecting the substrate 10 and the valgus angle measuring member 20. Through the stepped portion 521 and the connecting pin 52, the relative position between the substrate 10 and the valgus angle measuring member 20 can be kept unchanged in the axial direction of the connecting sleeve 51.

[0063] The connecting member 50 comprises a plurality of, the varus osteotomy measuring mechanism further comprises a connecting member 50, the first probe rod 322 and the first measuring plate 321 are connected through the connecting member 50, the connecting sleeve 51 is connected with the first measuring plate 321, the connecting pin 52 is arranged on the second end of the first probe rod 322, and the valgus angle measuring member 20 is located between the stepped portion 521 and the connecting pin 52.

[0064] The use method of the tibial osteotomy measuring device of the present embodiment is as follows:

[0065] 1), place the tibial osteotomy measuring device in the incision close to the distal end of the tibia;

[0066] 2), adjust the first measuring member 32 and the second measuring member 42, and make the first measuring member 32 located at the lowest point of the medial side of the tibia, and the second measuring member 42 located at the lowest point of the lateral side of the tibia, and then drive the first external fixing member;

[0067] 3) According to the required valgus angle, the medial bone cutting depth and the lateral bone cutting depth, adjust the base plate 10, read the valgus angle by the valgus angle measuring piece 20, read the medial bone cutting depth by the first measuring piece 32, and read the lateral bone cutting depth by the second measuring piece 42, determine whether it is adjusted in place, and record the value of the bone cutting width indicating scale (used to guide the selection of the tibial plateau size);

[0068] 4) According to the placement position of the tibial bone cutting measuring device and the tibial bone cutting device used, select a suitable installation group, and punch the second fixing piece.

[0069] 5) Remove the tibial bone cutting measuring device, install the tibial bone cutting device, and complete the tibial bone cutting.

[0070] It should be noted that when the first sliding seat 31 slides on the base plate 10, the first measuring plate 321 can slide on the first sliding seat 31, and thus the rotation of the valgus angle measuring piece 20 relative to the base plate 10 can be realized.

[0071] When the second sliding seat 41 slides on the base plate 10, the second measuring plate 421 can slide on the second sliding seat 41, and thus the rotation of the valgus angle measuring piece 20 relative to the base plate 10 can be realized.

[0072] The tibial bone cutting measuring device with the assembled structure in the embodiment is used to guide the tibial bone cutting of the knee joint (valgus angle and depth of the bone cutting), the millimeter level width indicating module design (i.e. the bone cutting width indicating scale) is used to guide the selection of the tibial plateau size after the bone cutting, and has the following advantages:

[0073] 1) Multiple installation groups are pre-set to guide the installation of the tibial bone cutting device;

[0074] 2) The valgus angle of the bone cutting can be read to guide the tibial valgus bone cutting;

[0075] 3) The medial and lateral bone cutting height can be read to guide the medial and lateral tibial bone cutting depth;

[0076] 4) The width of the bone cutting surface after the bone cutting can be evaluated to guide the selection of the tibial plateau size;

[0077] 5) It can assist the installation of the tibial bone cutting module.

[0078] In the description of the application, it should be understood that "a plurality of" means two or more. The positional words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the positional relationship or position relationship shown in the drawings, which are only for the convenience of describing the application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the scope of protection of the application; the positional words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0079] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0080] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the application.

[0081] The above is only the preferred embodiment of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. A tibial osteotomy measuring device, characterized in that, include: base(10); An outward turning angle measuring element (20) is hinged to the substrate (10) to show the outward turning angle together with the substrate (10). A first guide groove (21) is provided on the outward turning angle measuring element (20). The medial osteotomy depth measuring mechanism (30) includes a first sliding seat (31) and a first measuring element (32). The first sliding seat (31) is movably disposed on the base plate (10) in the direction from the medial side of the tibia to the lateral side of the tibia. The first end of the first measuring element (32) can fit and cooperate with the lowest point of the medial side of the tibia. The second end of the first measuring element (32) is reciprocally disposed on the first sliding seat (31) in the direction from the distal end of the tibia to the proximal end of the tibia. The middle part of the first measuring element (32) is movably disposed in the first guide groove (21). The lateral osteotomy depth measuring mechanism (40) is spaced apart from the medial osteotomy depth measuring mechanism (30). The lateral osteotomy depth measuring mechanism (40) includes a second sliding seat (41) and a second measuring element (42). The second sliding seat (41) is movably disposed on the base plate (10) along the direction from the medial side of the tibia to the lateral side of the tibia. The first end of the second measuring element (42) can fit and cooperate with the lowest point of the lateral side of the tibia. The second end of the second measuring element (42) is reciprocally disposed on the second sliding seat (41) along the direction from the distal end of the tibia to the proximal end of the tibia. The middle part of the second measuring element (42) is movably disposed in the first guide groove (21). The medial osteotomy depth measuring mechanism (30) and the lateral osteotomy depth measuring mechanism (40) are both driven and cooperate with the eversion angle measuring component (20).

2. The tibial osteotomy measuring device according to claim 1, characterized in that, The first sliding seat (31) is provided with a slot (311) extending in the direction from the distal end of the tibia to the proximal end of the tibia, and the first measuring element (32) is movably inserted into the slot (311).

3. The tibial osteotomy measuring device according to claim 2, characterized in that, The substrate (10) is provided with a second guide groove (11), and the first sliding seat (31) and the second sliding seat (41) are movably disposed within the guide groove (11).

4. The tibial osteotomy measuring device according to any one of claims 1 to 3, characterized in that, The first measuring element (32) includes a first measuring plate (321) and a first probe rod (322). The first measuring plate (321) is movably disposed on the first sliding seat (31) along the direction from the distal end of the tibia to the proximal end of the tibia. The first end of the first probe rod (322) can be moved to fit against the lowest point of the medial side of the tibia. The second end of the first probe rod (322) is connected to the first measuring plate (321).

5. The tibial osteotomy measuring device according to any one of claims 1 to 3, characterized in that, The second measuring element (42) includes a second measuring plate (421) and a second probe rod (422). The second measuring plate (421) is movably disposed on the second sliding seat (41) in the direction from the distal end of the tibia to the proximal end of the tibia. The first end of the second probe rod (422) can be moved to fit against the lowest point on the outer side of the tibia. The second end of the second probe rod (422) is connected to the second measuring plate (421).

6. The tibial osteotomy measuring device according to claim 2 or 3, characterized in that, The outward angle measuring component (20) includes a first mounting plate (22) hinged to the base plate (10) and a third measuring plate (23) disposed at the end of the first mounting plate (22). The first guide groove (21) is disposed on the first mounting plate (22). The third measuring plate (23) is provided with an outward angle indicating scale (231). The base plate (10) has an indicating part (12) that cooperates with the outward angle indicating scale (231) to indicate the outward angle.

7. The tibial osteotomy measuring device according to claim 3, characterized in that, The first sliding seat (31) includes a second mounting plate (312) and a plurality of guide rods (313) spaced apart on the second mounting plate (312). The slot (311) is disposed on the second mounting plate (312), and the plurality of guide rods (313) are all inserted into the second guide groove (11). The guide rods (313) are guided and engaged with the second guide groove (11).

8. The tibial osteotomy measuring device according to claim 4, characterized in that, The first probe rod (322) is provided with a first mounting through hole (3221) for inserting the first external fixator. The first external fixator is inserted into the first mounting through hole (3221) and connected to the tibia.

9. The tibial osteotomy measuring device according to claim 2 or 3, characterized in that, The substrate (10) is provided with osteotomy width indicator scale (13), which extends along the length direction of the substrate (10).

10. The tibial osteotomy measuring device according to any one of claims 1 to 3, characterized in that, The base plate (10) is provided with a plurality of mounting groups (14) spaced apart. Each mounting group (14) includes two second mounting through holes (141) spaced apart. Two second external fasteners are respectively inserted into the two second mounting through holes (141) of one mounting group (14) and are connected to the tibia. And / or, the tibia osteotomy measuring device also includes a connector (50). The connector (50) includes a connecting sleeve (51) and a connecting nail (52). The base plate (10) is provided with a first connecting hole (15). The eversion angle The measuring component (20) is provided with a second connecting hole (24), the connecting sleeve (51) passes through the first connecting hole (15) and the second connecting hole (24), the connecting pin (52) is provided with a step portion (521), the connecting sleeve (51) is located on the side of the substrate (10) away from the outward angle measuring component (20) and is in contact with the substrate (10), the step portion (521) is located on the side of the outward angle measuring component (20) away from the substrate (10) and is in contact with the outward angle measuring component (20).

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