Positioner for malleolus medialis osteotomy

Abstract

The utility model discloses a positioner for malleolus medialis osteotomy, and relates to the technical field of medical instruments. The adjusting positioning piece is in sliding fit with the base; the sleeve is fixed in the adjusting and positioning piece through a clamping mechanism; the adjusting and positioning part comprises a guide plate, a positioning part and a positioning part, wherein the guide plate is connected with the base in a sliding mode; the rotating block is movably connected with the guide plate through a connecting frame, and the sleeve can be fixedly arranged in the rotating block through the clamping mechanism; and the locking piece can adjust the length between the guide plate and the base and the angle between the rotating block and the guide plate, so that the purpose of adjusting the angle and the position of the sleeve is achieved, and the adjusting device has the beneficial effects of being convenient to adjust and wide in application range.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a positioner for medial malleolus osteotomy. Background Art

[0002] Medial malleolus osteotomy is a recognized classic approach for the treatment of talus fractures and talar cartilage injuries. Oblique osteotomy is a surgical method commonly used by surgeons, that is, the medial malleolus osteotomy oriented at an average of 30° relative to the tibial axis enters the joint perpendicular to the tibial cartilage. This osteotomy direction has the best healing rate, and the locking direction of the bone screw is perpendicular to the osteotomy direction, and the fixation strength is the best. The entrance of the oscillating saw osteotomy is marked as point A, the exit of the oscillating saw osteotomy is marked as point C, the entry point of the bone screw is marked as point B, and the end point of the bone screw is marked as point D, AC⊥BD.

[0003] In clinical practice, a positioning pin (screw or Kirschner wire) is generally used to locate the osteotomy line, and the positioning pin needs to be positioned by a sleeve on the locator. The angle between the sleeve and the locator in the prior art is fixed, so it can only be used at a specific angle, resulting in a small scope of application and many inconveniences in use. Utility Model Content

[0004] In view of this, the present application provides a positioner for medial malleolus osteotomy to solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A locator for medial malleolus osteotomy, comprising:

[0007] A base, wherein an inclined rod is provided on the base;

[0008] An adjustment positioning member slidably matched with the base;

[0009] A sleeve fixed in the adjustment positioning member by a clamping mechanism;

[0010] Wherein, the adjusting positioning member comprises:

[0011] A guide plate slidably connected to the base;

[0012] A rotating block movably connected to the guide plate via a connecting frame, wherein the sleeve can be fixedly arranged in the rotating block via the clamping mechanism;

[0013] A locking piece, wherein the locking piece can adjust the length between the guide plate and the base and the angle between the rotating block and the guide plate, thereby achieving the purpose of adjusting the angle and position of the sleeve.

[0014] Furthermore, the locking member includes a first locking knob and a second locking knob.

[0015] Furthermore, the first locking knob is threadedly connected to the base, and the lower end of the first locking knob can be abutted against the guide plate.

[0016] Furthermore, the second locking knob is threadedly connected to the connecting frame, and the rear end of the second locking knob can be abutted against the rotating block.

[0017] Furthermore, the clamping mechanism comprises:

[0018] A support mounted on the rotating block;

[0019] A driving assembly movably connected to the support;

[0020] A pair of hinged rods, both right ends of which are movably connected to the driving assembly, and the left ends of the hinged rods are hinged on the support;

[0021] A pair of clamping assemblies are clamped on the sleeve, and the clamping assemblies are fixedly connected to the corresponding hinge rods.

[0022] Furthermore, the driving assembly comprises:

[0023] A guide rod slidably engaged with the support;

[0024] A pressure plate connected to the guide rod;

[0025] A compression spring is sleeved on the guide rod, and the compression spring is supported between the support and the pressure plate.

[0026] Furthermore, a connecting rod is provided at the left end of the guide rod, a connecting pin is installed on the connecting rod, and a sliding groove slidably connected to the connecting pin is provided on the hinged rod.

[0027] Furthermore, the clamping assembly comprises:

[0028] A clamping jaw fixedly connected to the corresponding hinged rod;

[0029] A clamping block connected to the corresponding clamping jaw;

[0030] A tension spring is connected between the clamping jaw and the support.

[0031] Furthermore, the hinged rod is hinged to the support via a connecting shaft, and the clamping claw is fixedly connected to the corresponding connecting shaft.

[0032] Furthermore, the rotating block is rotatably connected to the connecting frame via a rotating shaft, and a pair of wear-resistant sleeves are sleeved on the rotating shaft.

[0033] It can be seen from the above technical solution that the advantages of the utility model are:

[0034] 1. In the present application, the guide plate is slidably connected to the base, and the position of the guide plate can be fixed by a first locking knob, so that the present application can adjust the distance between the sleeve and the base, making it more convenient to use.

[0035] 2. In this application, the sleeve is connected to the rotating block through a clamping mechanism. The clamping mechanism has a simple structure and is easy to operate, making the installation of the sleeve more efficient.

[0036] 3. In the present application, the rotating block and the guide plate can rotate, so as to facilitate the adjustment of the angle of the sleeve, so that it can be used for surgical positioning for different groups of people. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0038] Figure 1 This is a schematic diagram of the structure of this application.

[0039] Figure 2 This is a top view of the present application.

[0040] Figure 3 for Figure 2 A partial enlarged view of point A.

[0041] Figure 4 This is a schematic diagram of the structure used in this application.

[0042] Figure 5 The figure is a schematic diagram of the oblique cutting direction for exposing the talus during medial malleolus osteotomy in the prior art.

[0043] List of figure marks: inclined rod 1, handle 11, base 2, slide groove 21, first threaded hole 22, guide plate 3, first locking knob 4, connecting frame 5, second threaded hole 51, C-shaped cavity 52, rotating block 6, rotating shaft 61, wear-resistant sleeve 611, accommodating cavity 62, second locking knob 7, clamping mechanism 8, pressure plate 81, guide rod 82, compression spring 83, support 84, connecting rod 85, connecting pin 86, hinged rod 87, slide groove 871, connecting shaft 872, clamping claw 88, tension spring 881, clamping block 89, sleeve 9. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the implementation modes and the accompanying drawings. Here, the illustrative implementation modes and descriptions of the present application are used to explain the present application, but are not intended to limit the present application.

[0045] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0046] In addition, the terms “first” and “second” are merely used for distinction in description and have no special meanings.

[0047] In the prior art, medial malleolus osteotomy is the recognized classic approach for treating talar fractures and talar cartilage injuries, but there are various ways of osteotomy, including transverse incision, oblique incision, transverse-vertical incision and oblique-vertical incision. Oblique osteotomy is a technique commonly used by many surgeons. It has many advantages, including relatively simple technology, good talar exposure, preservation of deltoid ligament and optimal screw compression, and is the preferred approach for the treatment of medial talar lesions with autologous osteochondral transplantation or metal implantation.

[0048] Related research "Direction of the oblique medial malleolar osteotomy for exposure of the talus" (Arch Orthop Trauma Surg (2011) 131: 893-901 DOI10.1007 / s00402-010-1227-8) shows that if Figure 5 As shown, the medial malleolus osteotomy oriented at an average of 30° relative to the tibial axis enters the joint perpendicular to the tibial cartilage. This osteotomy direction has the best healing rate, the bone screw locking direction is perpendicular to the osteotomy direction, and the fixation strength is the best; the oscillating saw osteotomy entrance is marked as point A, the oscillating saw osteotomy exit is marked as point C, the bone screw entry point is marked as point B, the bone screw termination point is marked as point D, and AC⊥BD.

[0049] At present, the position of the screw is mostly determined by the sleeve in the positioner in clinical practice. However, the sleeve and the positioner in the prior art are fixedly connected, and the position and angle of the sleeve cannot be adjusted according to the actual patient, resulting in a narrow scope of use.

[0050] refer to Figures 1 to 4 ,like Figure 1As shown, the present embodiment provides a positioner for medial malleolus osteotomy, which can solve the above-mentioned problems and thus improve the convenience of use. The positioner for medial malleolus osteotomy comprises: a base 2, an adjustment positioner and a sleeve 9, wherein the base 2 is provided with an inclined rod 1; a handle 11 is connected to the upper end of the inclined rod 1, and the handle 11 is convenient for finger operation during installation, and the adjustment positioner is slidably matched with the base 2; the sleeve 9 is fixed in the adjustment positioner by a clamping mechanism 8; wherein the adjustment positioner comprises: a guide plate 3, a rotating block 6 and a locking member, wherein the guide plate 3 is slidably connected with the base 2; the rotating block 6 is movably connected with the guide plate 3 by a connecting frame 5, and the sleeve 9 can be fixedly arranged in the accommodating cavity 62 of the rotating block 6 by the clamping mechanism 8; the locking member can adjust the length between the guide plate 3 and the base 2 and the angle between the rotating block 6 and the guide plate 3, thereby achieving the purpose of adjusting the angle and position of the sleeve 9.

[0051] like Figure 2 As shown, the locking member includes a first locking knob 4 and a second locking knob 7 .

[0052] In the embodiment of the present application, the first locking knob 4 is threadedly connected to the base 2 , and the lower end of the first locking knob 4 can be abutted against the guide plate 3 .

[0053] Preferably, in the embodiment of the present application, a slide groove 21 is provided in the base 2 , and the guide plate 3 is slidably disposed in the slide groove 21 .

[0054] Preferably, in the embodiment of the present application, the right end of the slide groove 21 has an opening to facilitate the installation of the guide plate 3. After installation, the guide plate 3 can be fixed by rotating the first locking knob 4 so that the lower end of the first locking knob 4 abuts against the guide plate 3.

[0055] Preferably, in the embodiment of the present application, a first threaded hole 22 is formed on the base 2 , and the first locking knob 4 is threadedly connected to the first threaded hole 22 .

[0056] In the embodiment of the present application, the second locking knob 7 is threadedly connected to the connecting frame 5 , and the rear end of the second locking knob 7 can be abutted against the rotating block 6 .

[0057] Preferably, in the embodiment of the present application, the connecting frame 5 is in a “C” shape with its opening facing right, and the rotating block 6 is hinged in the C-shaped cavity 52 of the connecting frame 5 .

[0058] Preferably, in the embodiment of the present application, a second threaded hole 51 is opened in the connecting frame 5, and the rear end of the second locking knob 7 can be abutted against the front side of the rotating block 6 after passing through the second threaded hole 51, thereby fixing the rotating block 6.

[0059] Preferably, in the embodiment of the present application, the second threaded hole 51 is located at the front side of the C-shaped cavity 52 .

[0060] Preferably, in the embodiment of the present application, the rotating shaft 61 and the second locking knob 7 are respectively located at the left and right ends of the rotating block 6, so as to achieve a better locking effect of the second locking knob 7.

[0061] Preferably, in the embodiment of the present application, the rotating block 6 is rotatably connected to the connecting frame 5 via a rotating shaft 61, and a pair of wear-resistant sleeves 611 are sleeved on the rotating shaft 61, and the wear-resistant sleeves 611 are located between the rotating block 6 and the corresponding side walls in the C-shaped cavity 52, and the wear-resistant sleeves 611 are close to the rotating block 6 and the side walls of the C-shaped cavity 52. ​​Therefore, when adjusting the angle of the rotating block 6, it is necessary to loosen the second locking knob 7 and then manually rotate the rotating block 6 to rotate the rotating block 6. Therefore, the wear-resistant sleeves 611 can prevent the rotating block 6 from automatically rotating downward under the action of gravity, thereby making the connection stable and reliable, and the positioning accuracy is higher.

[0062] like Figure 3 As shown, the clamping mechanism 8 includes: a support 84, a driving assembly, a pair of hinged rods 87 and a pair of clamping assemblies, the support 84 is installed on the rotating block 6; the driving assembly is movably connected to the support 84; the right ends of a pair of hinged rods 87 are movably connected to the driving assembly, and the left ends of the hinged rods 87 are hinged on the support 84; a pair of clamping assemblies are symmetrically clamped on the sleeve 9 front and back, and the clamping assemblies are fixedly connected to the corresponding hinged rods 87.

[0063] Preferably, in the embodiment of the present application, the support 84 is a "C"-shaped structure with its opening facing left.

[0064] In the embodiment of the present application, the driving assembly includes: a guide rod 82, a pressure plate 81 and a compression spring 83, the guide rod 82 is slidably matched with the support 84; the pressure plate 81 is connected to the guide rod 82; the compression spring 83 is sleeved on the guide rod 82, and the compression spring 83 is supported between the support 84 and the pressure plate 81.

[0065] Preferably, in some embodiments, the guide rod 82 is slidably connected to the support 84 via a T-shaped guide sleeve.

[0066] Preferably, in the embodiment of the present application, a connecting rod 85 is provided at the left end of the guide rod 82, a connecting pin 86 is installed on the connecting rod 85, a sliding groove 871 is provided on the hinged rod 87, and the connecting pin 86 can slide in the sliding groove 871, thereby driving a pair of hinged rods 87 to swing.

[0067] Preferably, in the embodiment of the present application, the clamping assembly includes: a clamping jaw 88, a clamping block 89 and a tension spring 881, the clamping jaw 88 is fixedly connected to the corresponding hinge rod 87; the clamping block 89 is connected to the corresponding clamping jaw 88; the tension spring 881 is connected between the clamping jaw 88 and the support 84, and the tension spring 881 can not only increase the clamping effect of the clamping block 89 on the rotating block 6, but also help the clamping jaw 88 to quickly reset.

[0068] Preferably, in the embodiment of the present application, the hinged rod 87 is hinged to the support 84 via a connecting shaft 872 , and the clamping claw 88 is fixedly connected to the corresponding connecting shaft 872 .

[0069] In the embodiment of the present application, the pressure plate 81 is pressed to cause the guide rod 82 to move to the left, and the compression spring 83 is squeezed to provide elasticity for subsequent resetting. The guide rod 82 moves to the left, driving the connecting pin 86 to move, so that a pair of hinged rods 87 swing in the direction of increasing the angle, so that a pair of clamping claws 88 move away from each other, and the tension spring 881 is stretched. After the sleeve 9 is placed in the accommodating cavity 62, the pressure plate 81 is released, and under the reaction force of the tension spring 881 and the compression spring 83, a pair of clamping blocks 89 clamp the sleeve 9. Working principle: Before the operation, the doctor can determine the position of the oscillating saw osteotomy exit point C and the bone screw entry point point B based on the patient's X-ray / CT images, which is convenient for intraoperative positioning and selection. BC is on the same horizontal line as the upper edge of the ankle joint, and point B is determined. Then point C is selected, and the distance between BC is measured so that the distance BC = AB. The length of AB is adjusted, that is, the length from the base 2 to the sleeve 9. The locator is placed at the medial malleolus, and the osteotomy is performed along the direction in which the oblique rod 1 coincides with AC to expose the lesion. After the operation is completed, the screw is inserted at position B along the axial direction of the sleeve 9. The medial malleolus width BC of an adult is different from that of a child. The length from the base 2 to the sleeve 9 can be adjusted according to the measurement data of the patient population to meet the needs of different patients and achieve the versatility of the tool.

[0070] In summary, the present application is not only easy to operate, but also can adjust the angle and position of the sleeve according to different patient groups, thereby achieving a better positioning effect.

[0071] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the embodiments of the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A locator for medial malleolus osteotomy, characterized in that: include: A base (2), wherein an inclined rod (1) is provided on the base (2); an adjustment positioning member slidably matched with the base (2); A sleeve (9) fixed in the adjustment positioning member by a clamping mechanism (8); Wherein, the adjusting positioning member comprises: A guide plate (3) slidably connected to the base (2); A rotating block (6) movably connected to the guide plate (3) via a connecting frame (5), wherein the sleeve (9) can be fixedly arranged in the rotating block (6) via the clamping mechanism (8); A locking member, wherein the locking member is capable of adjusting the length between the guide plate (3) and the base (2) and the angle between the rotating block (6) and the guide plate (3), thereby achieving the purpose of adjusting the angle and position of the sleeve (9).

2. The positioner for medial malleolus osteotomy according to claim 1, characterized in that: The locking member comprises a first locking knob (4) and a second locking knob (7).

3. The positioner for medial malleolus osteotomy according to claim 2, characterized in that: The first locking knob (4) is threadedly connected to the base (2), and the lower end of the first locking knob (4) can be abutted against the guide plate (3).

4. The positioner for medial malleolus osteotomy according to claim 2, characterized in that: The second locking knob (7) is threadedly connected to the connecting frame (5), and the rear end of the second locking knob (7) can be abutted against the rotating block (6).

5. The positioner for medial malleolus osteotomy according to claim 1, characterized in that: The clamping mechanism (8) comprises: A support (84) mounted on the rotating block (6); a drive assembly movably connected to the support (84); a pair of hinged rods (87) both of which are movably connected to the driving assembly at their right ends, and the left ends of the hinged rods (87) are hinged on the support (84); A pair of clamping assemblies are clamped on the sleeve (9), and the clamping assemblies are fixedly connected to the corresponding hinge rods (87).

6. The positioner for medial malleolus osteotomy according to claim 5, characterized in that: The drive assembly comprises: A guide rod (82) slidably engaged with the support (84); A pressing plate (81) connected to the guide rod (82); A compression spring (83) is sleeved on the guide rod (82), and the compression spring (83) is abutted between the support (84) and the pressure plate (81).

7. The positioner for medial malleolus osteotomy according to claim 6, characterized in that: A connecting rod (85) is provided at the left end of the guide rod (82), a connecting pin (86) is installed on the connecting rod (85), and a sliding groove (871) slidably connected to the connecting pin (86) is provided on the hinge rod (87).

8. The positioner for medial malleolus osteotomy according to claim 5, characterized in that: The clamping assembly comprises: A clamping claw (88) fixedly connected to the corresponding hinged rod (87); A clamping block (89) connected to the corresponding clamping jaw (88); A tension spring (881) is connected between the clamping jaw (88) and the support (84).

9. The positioner for medial malleolus osteotomy according to claim 8, characterized in that: The hinged rod (87) is hinged to the support (84) via a connecting shaft (872), and the clamping claw (88) is fixedly connected to the corresponding connecting shaft (872).

10. The positioner for medial malleolus osteotomy according to claim 8, characterized in that: The rotating block (6) is rotatably connected to the connecting frame (5) via a rotating shaft (61), and a pair of wear-resistant sleeves (611) are sleeved on the rotating shaft (61).

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