An external fixation below-knee orthosis

Abstract

The present invention relates to the field of medical device technology, and in particular to an externally fixed below-the-knee orthosis, which includes an adjustment component, a fixing component, and a rotating component, wherein the fixing component is fixedly connected to the upper tibia, one end of the adjustment component is rotationally connected to the fixing component, and the other end is rotationally connected to the rotating component, and the other end of the rotating component is rotationally connected to an end of the fixing component away from the adjustment component, and the rotating component is fixedly connected to the lower tibia, and the adjustment component can drive the rotating component to rotate around the fixing component by adjusting its own length, and drive the lower tibia to rotate around the connection between the upper tibia and the lower tibia. The present invention can reduce the difficulty of surgery, reduce the damage to the human body caused by surgery, and slowly correct below-the-knee deformity, and can be applied to various angles of below-the-knee deformity correction.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an external fixation below-knee orthosis. Background Art

[0002] When a person has a knee deformity such as genu varum or genu valgum, orthopedic treatment is required. In the prior art, two methods are commonly used: internal fixation plate orthopedic treatment and external fixation orthosis. Internal fixation plate orthopedic treatment is a traditional method of knee orthopedic treatment, but the internal fixation plate is highly traumatic and may cause problems such as nonunion in the later stage, and multiple surgeries are required, increasing the cost for patients. The existing external fixation orthosis that can be used for knee orthopedic treatment is the Taylor six-axis bracket, but the Taylor six-axis bracket is complicated to install and adjust, and its large size causes many inconveniences to patients during use.

[0003] Therefore, there is an urgent need for an external fixation below-the-knee orthosis to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide an external fixation below-the-knee orthosis, which can reduce the difficulty of surgery, reduce complications, and slowly correct the tibia, and at the same time is small in size, convenient and practical.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] An externally fixed below-knee orthosis comprises: an adjustment component, a fixing component and a rotating component, wherein the fixing component is fixedly connected to the upper tibia, one end of the adjustment component is rotationally connected to the fixing component, and the other end is rotationally connected to the rotating component, the other end of the rotating component is rotationally connected to an end of the fixing component away from the adjustment component, and the rotating component is fixedly connected to the lower tibia, and the adjustment component can drive the rotating component to rotate around the fixing component by adjusting its own length, thereby driving the lower tibia to rotate around the connection between the upper tibia and the lower tibia.

[0007] Optionally, the fixing assembly includes a first bone needle locking mechanism, a fixing rod and a universal adjustment mechanism, the first bone needle locking mechanism is used to connect to a first bone needle implanted at one end in the upper tibia, the first bone needle locking mechanism is fixedly connected to the fixing rod, one end of the fixing rod is rotatably connected to the adjustment assembly, and the other end is provided with the universal adjustment mechanism, and the rotating assembly is rotatably connected to the universal adjustment mechanism.

[0008] Optionally, the first bone needle locking mechanism includes a first bone needle fixing member and a first connecting member, the first connecting member is passed through the fixing rod, and one end of the first bone needle away from the tibia is connected to the first connecting member through the first bone needle fixing member.

[0009] Optionally, the first bone needle fixing component includes a first male end and a first female end, the first male end cooperates with the first female end to hold the first bone needle, the first connecting component is passed through the first male end and the first female end, and the first male end and the first female end are fixedly connected to the first connecting component via a nut.

[0010] Optionally, the universal adjustment mechanism includes an adjusting male end and an adjusting female end, the adjusting male end is fixedly connected to an end of the fixing rod away from the adjusting assembly, the adjusting female end is arranged on the adjusting male end and can rotate relative to the adjusting male end, a rotating shaft is arranged at the lower end of the adjusting female end, the rotating assembly is rotatably connected to the rotating shaft, and a fastener is provided on the adjusting male end, and the fastener can limit the relative position of the adjusting male end and the adjusting female end.

[0011] Optionally, the adjustment assembly includes a first adjustment rod, a second adjustment rod and a locking mechanism, one end of the second adjustment rod is inserted into the first adjustment rod, the other end of the second adjustment rod is rotatably connected to the rotating assembly, and one end of the first adjustment rod away from the second adjustment rod is connected to the fixed rod, and the locking mechanism is used to limit the extension length of the second adjustment rod relative to the first adjustment rod.

[0012] Optionally, the locking mechanism includes a locking sleeve and a locking piece, the locking sleeve is sleeved on the second adjusting rod, one end of the locking sleeve is fixedly connected to the first adjusting rod through the locking piece, and the other end is fixedly connected to the second adjusting rod through another locking piece.

[0013] Optionally, the rotating assembly includes a rotating rod and a second bone needle locking mechanism, the second bone needle locking mechanism is used to connect to a second bone needle implanted at one end of the lower tibia, the second bone needle locking mechanism is fixedly connected to the rotating rod, one end of the rotating rod is rotatably connected to the second adjustment rod, and the other end is rotatably connected to the universal adjustment mechanism.

[0014] Optionally, a plurality of the first bone needle locking mechanism and a plurality of the second bone needle locking mechanism are provided.

[0015] Beneficial effects of the present invention:

[0016] The external fixation below-the-knee orthosis provided by the present invention utilizes a fixed component connected to the upper tibia, and a rotating component connected to the lower tibia. After osteotomy, the length of the adjusting component is adjusted to drive the rotating component to rotate relative to the fixed component, so that the relative angle between the upper tibia and the lower tibia changes slowly, achieving the purpose of correction. Through the above arrangement, correction can be completed by adjusting the length of the adjusting component multiple times, avoiding multiple surgeries to increase the patient's surgical costs, avoiding the large trauma of using steel plates for correction, and the problem of nonlinear correction process; at the same time, the complexity of using a Taylor six-axis bracket to adjust the length of the six rods to adjust the length of the component to adjust the angle between the upper tibia and the lower tibia is reduced. The present invention only needs to slowly adjust the length of the adjusting component to slowly correct the tibia. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural diagram of an external fixation below-knee orthosis.

[0018] In the figure:

[0019] 1-adjustment assembly; 11-first adjustment rod; 12-second adjustment rod; 13-locking member; 14-locking sleeve;

[0020] 2-fixing assembly; 21-fixing rod; 22-first bone needle; 23-first connecting piece; 24-first bone needle fixing piece; 241-first male end; 242-first female end; 25-first connecting rod; 26-connecting piece fixing piece; 261-fixed male end; 262-fixed female end; 27-universal adjustment mechanism; 271-adjusting male end; 272-adjusting female end; 28-rotating shaft;

[0021] 3-rotating assembly; 31-rotating rod; 32-second bone needle; 33-second connecting rod;

[0022] 4-proximal tibia;

[0023] 5- Distal tibia. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and implementation methods. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In order to reduce the difficulty of the operation, the tibia can be corrected slowly, which is convenient and practical. Figure 1 As shown, the present invention provides an external fixation below-knee orthosis, comprising: an adjustment component 1, a fixing component 2 and a rotating component 3, the fixing component 2 is fixedly connected to the upper tibia 4, one end of the adjustment component 1 is rotatably connected to the fixing component 2, and the other end is rotatably connected to the rotating component 3, the other end of the rotating component 3 is rotatably connected to an end of the fixing component 2 away from the adjustment component 1, and the rotating component 3 is fixedly connected to the lower tibia 5, and the adjustment component 1 can drive the rotating component 3 to rotate around the fixing component 2 by adjusting its own length, and drive the lower tibia 5 to rotate around the connection between the upper tibia 4 and the lower tibia 5.

[0027] In this embodiment, the structure composed of the adjustment component 1, the fixing component 2 and the rotating component 3 in the present externally fixed below-the-knee orthosis can be a plane triangle structure, or a space structure similar to a triangle. Through the above arrangement, it is possible to reduce the simplicity of the structure of the present externally fixed below-the-knee orthosis while ensuring that the present externally fixed below-the-knee orthosis has sufficient strength, so that it can better meet the needs of use. Of course, in other embodiments, it can also be other plane structure shapes or space structure shapes, and no excessive restrictions are made here.

[0028] The fixing component 2 is connected to the upper tibia 4, and the rotating component 3 is connected to the lower tibia 5. After osteotomy, the length of the adjusting component 1 is adjusted to drive the rotating component 3 to rotate relative to the fixing component 2, so that the relative angle between the upper tibia 4 and the lower tibia 5 changes slowly, achieving the purpose of correction. It avoids the increase of surgical costs for patients due to multiple surgeries, avoids the problems of large trauma caused by the use of steel plates, and nonlinear correction process; at the same time, it reduces the complexity of adjusting the angle between the upper tibia 4 and the lower tibia 5 by adjusting the length of the component 1 by adjusting the length of the 6 rods of the Taylor six-axis bracket, and is convenient to use.

[0029] Further, the fixing assembly 2 includes a first bone needle locking mechanism, a fixing rod 21 and a universal adjustment mechanism 27, one end of the first bone needle 22 is implanted in the upper tibia 4, and the other end is connected to the first bone needle locking mechanism, the first bone needle locking mechanism is fixedly connected to the fixing rod 21, one end of the fixing rod 21 is rotatably connected to the adjustment assembly 1, and the other end is provided with a universal adjustment mechanism 27, and the rotating assembly 3 is rotatably connected to the universal adjustment mechanism 27. Specifically, in this embodiment, a first connecting rod 25 is provided at one end of the fixing rod 21 connected to the adjustment assembly 1, one end of the first connecting rod 25 is fixedly connected to the fixing rod 21, and the other end is rotatably connected to the adjustment assembly 1. By providing the first connecting rod 25, the difficulty of connecting the adjustment assembly 1 with the fixing rod 21 is reduced, and installation is facilitated.

[0030] Further, the first bone needle locking mechanism includes a first bone needle fixing member 24 and a first connecting member 23, the first connecting member 23 is inserted into the fixing rod 21, and the end of the first bone needle 22 away from the tibia is fixedly connected to the first connecting member 23 through the first bone needle fixing member 24. In this embodiment, optionally, the first bone needle fixing member 24 includes a first male end 241 and a first female end 242, the first male end 241 cooperates with the first female end 242 to hold the first bone needle 22, the first connecting member 23 is inserted into the first male end 241 and the first female end 242, and the first male end 241 and the first female end 242 are fixedly connected to the first connecting member 23 through a nut. Specifically, a positioning protrusion and a semicircular groove are provided on the first male end 241, and a positioning groove and a semicircular groove that cooperate with the positioning protrusion are provided on the first female end 242, and the installation of the first bone needle fixing member 24 is achieved through the cooperation of the positioning groove and the positioning protrusion. The two semicircular grooves cooperate to hold the first bone needle 22 , and in order to fix multiple first bone needles 22 , multiple first bone needle fixing members 24 are provided.

[0031] In order to facilitate the fixed connection between the first connecting member 23 and the fixing rod 21, optionally, the fixing assembly 2 also includes a connecting member fixing member 26, and the connecting member fixing member 26 includes a fixed male end 261 and a fixed female end 262. The fixed male end 261 and the fixed female end 262 cooperate to hold the first connecting member 23, and the fixing rod 21 is passed through the fixed male end 261 and the fixed female end 262.

[0032] Further, the universal adjustment mechanism 27 includes an adjustment male end 271 and an adjustment female end 272, the adjustment male end 271 is fixedly connected to the end of the fixed rod 21 away from the adjustment assembly 1, the adjustment female end 272 is arranged on the adjustment male end 271, and can rotate relative to the adjustment male end 271, the lower end of the adjustment female end 272 is provided with a rotating shaft 28, the rotating assembly 3 is rotatably connected to the rotating shaft 28, and the adjustment male end 271 is provided with a fastener, which can limit the relative position of the adjustment male end 271 and the adjustment female end 272. Specifically, a spherical groove is provided at the lower end of the adjustment male end 271, and a spherical protrusion is provided at the adjustment female end 272, and the spherical protrusion is arranged in the spherical groove, so that the adjustment female end 272 can rotate relative to the adjustment male end 271.

[0033] Since the lower end of the adjusting female end 272 is provided with a rotating shaft 28, when the rotating assembly 3 is installed, the axis of the rotating shaft 28 should be parallel to the connection between the upper tibia 4 and the lower tibia 5, so as to ensure that the rotating assembly 3 drives the lower tibia 5 to rotate in accordance with the growth of the tibia. During use, the adjusting female end 272 is rotated so that the axis of the rotating shaft 28 is parallel to the connection between the upper tibia 4 and the lower tibia 5, and then the relative position between the adjusting female end 272 and the adjusting male end 271 is limited by fasteners.

[0034] Furthermore, the adjustment assembly 1 includes a first adjustment rod 11, a second adjustment rod 12 and a locking mechanism, one end of the second adjustment rod 12 is inserted into the first adjustment rod 11, the other end of the second adjustment rod 12 is rotatably connected to the rotating assembly 3, and one end of the first adjustment rod 11 away from the second adjustment rod 12 is connected to the fixed rod 21, and the locking mechanism is used to limit the extension length of the second adjustment rod 12 relative to the first adjustment rod 11.

[0035] Specifically, the locking mechanism includes a locking sleeve 14 and a locking member 13. The locking sleeve 14 is sleeved on the second adjusting rod 12. One end of the locking sleeve 14 is fixedly connected to the first adjusting rod 11 through the locking member 13, and the other end is fixedly connected to the second adjusting rod 12 through another locking member 13. When adjusting the length of the adjusting assembly 1, first loosen the two locking members 13, then adjust the extension length of the second adjusting rod 12, and after adjustment, lock the two locking members 13 to complete the adjustment. In this embodiment, an opening structure is provided on the locking sleeve 14, and the opening structure extends from both ends of the locking sleeve 14 to the middle. The locking member 13 is screwed to the locking sleeve 14 to ensure that the locking sleeve 14 is stably connected to the first adjusting rod 11 and the second adjusting rod 12.

[0036] Furthermore, the rotating assembly 3 includes a rotating rod 31 and a second bone needle locking mechanism, one end of the second bone needle 32 is implanted in the lower tibia 5, and the other end is connected to the second bone needle locking mechanism, the second bone needle locking mechanism is fixedly connected to the rotating rod 31, one end of the rotating rod 31 is rotationally connected to the second adjustment rod 12, and the other end is rotationally connected to the universal adjustment mechanism 27. The second bone needle locking mechanism is similar to the first bone needle locking mechanism, and will not be described in detail here. Similarly, in order to fix multiple second bone needles 32, multiple second bone needle locking mechanisms are provided.

[0037] To facilitate installation, optionally, a second connecting rod 33 is provided at one end of the rotating rod 31 connected to the second adjusting rod 12 , one end of the second connecting rod 33 is fixedly connected to the rotating rod 31 , and the other end is rotatably connected to the second adjusting rod 12 .

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An external fixation below-knee orthosis, characterized in that: include: An adjustment component (1), a fixing component (2) and a rotating component (3), wherein the fixing component (2) is fixedly connected to the upper tibia (4), one end of the adjustment component (1) is rotationally connected to the fixing component (2), and the other end is rotationally connected to the rotating component (3), the other end of the rotating component (3) is rotationally connected to an end of the fixing component (2) away from the adjustment component (1), and the rotating component (3) is fixedly connected to the lower tibia (5), and the adjustment component (1) can drive the rotating component (3) to rotate around the fixing component (2) by adjusting its own length, thereby driving the lower tibia (5) to rotate around the connection between the upper tibia (4) and the lower tibia (5); The fixing assembly (2) comprises a first bone needle locking mechanism, a fixing rod (21) and a universal adjustment mechanism (27); the first bone needle locking mechanism is used to connect with a first bone needle (22) one end of which is implanted in the upper tibia (4); the first bone needle locking mechanism is fixedly connected to the fixing rod (21); one end of the fixing rod (21) is rotatably connected to the adjustment assembly (1); the other end is provided with the universal adjustment mechanism (27); the rotating assembly (3) is rotatably connected to the universal adjustment mechanism (27); A first connecting rod (25) is provided at one end of the fixing rod (21) connected to the adjusting assembly (1); one end of the first connecting rod (25) is fixedly connected to the fixing rod (21), and the other end is rotatably connected to the adjusting assembly (1); The universal adjustment mechanism (27) comprises an adjustment male end (271) and an adjustment female end (272); the adjustment male end (271) is fixedly connected to an end of the fixing rod (21) away from the adjustment assembly (1); the adjustment female end (272) is arranged on the adjustment male end (271) and can rotate relative to the adjustment male end (271); a rotating shaft (28) is arranged at the lower end of the adjustment female end (272); the rotating assembly (3) is rotatably connected to the rotating shaft (28); a fastener is arranged on the adjustment male end (271); the fastener can limit the relative position of the adjustment male end (271) and the adjustment female end (272); The adjustment assembly (1) comprises a first adjustment rod (11), a second adjustment rod (12) and a locking mechanism; one end of the second adjustment rod (12) is inserted into the first adjustment rod (11); the other end of the second adjustment rod (12) is rotationally connected to the rotating assembly (3); one end of the first adjustment rod (11) away from the second adjustment rod (12) is connected to the fixed rod (21); and the locking mechanism is used to limit the extension length of the second adjustment rod (12) relative to the first adjustment rod (11).

2. The external fixation below-knee orthosis according to claim 1, characterized in that: The first bone needle locking mechanism comprises a first bone needle fixing member (24) and a first connecting member (23), wherein the first connecting member (23) is passed through the fixing rod (21), and an end of the first bone needle (22) away from the tibia is connected to the first connecting member (23) via the first bone needle fixing member (24).

3. The external fixation below-knee orthosis according to claim 2, characterized in that: The first bone needle fixing component (24) includes a first male end (241) and a first female end (242), the first male end (241) and the first female end (242) cooperate to hold the first bone needle (22), the first connecting component (23) is passed through the first male end (241) and the first female end (242), the first male end (241) and the first female end (242) are fixedly connected to the first connecting component (23) via a nut.

4. The external fixation below-knee orthosis according to claim 1, characterized in that: The locking mechanism comprises a locking sleeve (14) and a locking piece (13); the locking sleeve (14) is sleeved on the second adjusting rod (12); one end of the locking sleeve (14) is fixedly connected to the first adjusting rod (11) via the locking piece (13); and the other end of the locking sleeve (14) is fixedly connected to the second adjusting rod (12) via another locking piece (13).

5. The external fixation below-knee orthosis according to claim 1, characterized in that: The rotating assembly (3) comprises a rotating rod (31) and a second bone needle locking mechanism, wherein the second bone needle locking mechanism is used to connect to a second bone needle (32) one end of which is implanted in the lower part of the tibia (5), and the second bone needle locking mechanism is fixedly connected to the rotating rod (31), one end of the rotating rod (31) is rotationally connected to the second adjustment rod (12), and the other end is rotationally connected to the universal adjustment mechanism (27).

6. The external fixation below-knee orthosis according to claim 5, characterized in that: The first bone needle locking mechanism and the second bone needle locking mechanism are both provided in plurality.

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