Tibia intramedullary fixing device

Abstract

The utility model provides a tibia intramedullary fixing device, which belongs to the technical field of medical instruments and comprises a support plate, a tibia rod inserted and connected in the middle of the support plate, an adjusting seat arranged in the middle of the support plate, a connecting seat hinged to the bottom of the adjusting seat, a closing seat sleeved on the top of the adjusting seat, and a fixing screw in threaded connection with one end of the closing seat. A connecting groove is formed in the top of one side of the connecting base, one end of the fixing screw rod is connected into the connecting groove in a threaded mode, a fixing hole is formed in the bottom of the inner wall of the connecting groove, a movable rod is connected into the fixing hole in a penetrating and inserting mode, a fixing bone nail base is arranged outside the movable rod in a sleeved mode, and a movable groove is formed in one side of the fixing bone nail base. The approximate installation angle of the bone nail is adjusted by rotating the closing base, the connecting column is inserted into the clamping hole, the limiting nut is screwed down, the fixing screw is installed to fix the closing base, the supporting plate is clamped through the connecting base and the closing base, and the insertion angle of the bone nail is fixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a tibial intramedullary fixation device. Background Art

[0002] At present, in the intramedullary nail fixation surgery for tibial fractures, it is inconvenient to support the patient's bent legs, and it is also inconvenient to fix the angle of the bent legs. During the bone screw insertion process, the leg bone nails affect the insertion position of the bone screws and reduce the surgical effect. Among them, the "A kind of tibial fracture intramedullary nail fixation surgery auxiliary device" disclosed in the application number "CN202021876752.1" is also an increasingly mature technology. The slider is placed in the sliding groove, the connecting plate is positioned with the slider through the positioning groove and then locked by the second nut. After adjusting the two transparent plates to the appropriate opening angle, they are locked and fixed by the first nut and the adjusting screw hole. When not in use, the two transparent plates can be opened to an angle of 180 degrees for storage. It is very convenient to use, assemble and store, reduce costs, improve efficiency, and has good stability. However, the device also has the following defects: during the fixation and insertion process, the doctor needs to manually adjust the insertion position of the bone screw. The above-mentioned equipment can only fix the leg, and cannot assist the doctor in adjusting the insertion position of the bone screw, which affects the accuracy of the bone screw insertion. Summary of the invention

[0003] The purpose of the utility model is to provide a tibial intramedullary fixation device, aiming to solve the problem in the prior art that during the fixation and insertion process, the doctor needs to manually adjust the insertion position of the bone screw. The above-mentioned device can only fix the leg but cannot assist the doctor in adjusting the insertion position of the bone screw, thus affecting the accuracy of the bone screw insertion.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: it includes a support plate, a tibial rod is inserted and connected with the middle part of the support plate, an adjusting seat is provided in the middle part of the support plate, a connecting seat is hinged at the bottom of the adjusting seat, a closing seat is sleeved on the top of the adjusting seat, one end of the closing seat is threadedly connected with a fixing screw, a connecting groove is opened at the top of one side of the connecting seat, one end of the fixing screw is threadedly connected with the connecting groove, a fixing hole is provided at the bottom of the inner wall of the connecting groove, a movable rod is inserted and connected in the fixing hole, a fixing bone screw seat is sleeved on the outside of the movable rod, a movable groove is opened on one side of the fixing bone screw seat, and arch-shaped closing plates are slidably connected on both sides of the movable groove, bone screw holes are opened at the top and bottom of one side of the arch-shaped closing plate, a locking screw is threadedly connected to the middle part of the arch-shaped closing plate, and locking nuts are threadedly connected to both ends of the locking screw.

[0005] In an implementation scheme of a tibial intramedullary fixation device of the utility model, a clamping groove is provided at the top and the bottom of the other side of the arch-shaped closing plate, and an anti-slip texture is provided on the inner wall of the clamping groove.

[0006] In this solution, the fixed bone screw seat on the movable rod is slid, and after the position of the fixed bone screw seat is adjusted, the locking screw is rotated to squeeze the two arch-shaped closing plates inward to clamp the movable rod in the clamping groove.

[0007] In an implementation scheme of a tibial intramedullary fixation device of the utility model, a connecting column is provided on the top of the connecting seat, a clamping hole is opened at the other end of the closing seat, and the connecting column is inserted and connected with the clamping hole.

[0008] In this solution, rotate the connecting seat, adjust the angle of the connecting seat, install the closing seat, insert the connecting column into the clamping hole, rotate the fixing screw, install the fixing screw into the connecting groove, fix the closing seat and the connecting seat, and use the fixing screw to support the two ends of the movable rod to prevent the movable rod from loosening.

[0009] In an implementation scheme of the tibial intramedullary fixation device of the utility model, the top end of the connecting column is threadedly connected to a limiting nut.

[0010] In this solution, the limit nut is installed on the connecting column, and the limit nut is tightened, so that the connecting seat and the closing seat clamp the adjusting seat to fix the rotation angle of the adjusting seat.

[0011] In an implementation scheme of the tibial intramedullary fixation device of the utility model, return springs are arranged on both sides of the inner wall of the movable groove.

[0012] In this scheme, after pulling the bow-shaped closing plate and adjusting the position of the fixed bone screw seat, the bow-shaped closing plate reset spring is released to push inward so that the bow-shaped closing plate automatically clamps the movable rod in the clamping groove to prevent the fixed bone screw seat from falling, making it easier to subsequently use the locking screw to fix the bow-shaped closing plate, and use the bow-shaped closing plate to clamp the movable rod to fix the bone screw hole insertion position.

[0013] In an implementation scheme of a tibial intramedullary fixation device of the utility model, an anti-slip ring is provided at the bottom of the clamping hole.

[0014] In this solution, when one end of the connecting seat abuts against the adjusting seat, the anti-skid ring increases the friction force to prevent the connecting seat from slipping.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By rotating the closing seat, the approximate installation angle of the bone screw is adjusted, the connecting column is inserted into the clamping hole and the limiting nut is tightened, the fixing screw is installed to fix the closing seat, and the support plate is clamped by the connecting seat and the closing seat to fix the insertion angle of the bone screw;

[0017] The position of the inserted bone screw is adjusted by sliding the fixed bone screw seat on the movable rod. After the position of the bone screw seat is fixed, the locking screw is rotated to squeeze the two arch-shaped closing plates inward, and the movable rod is clamped in the clamping groove to fix the insertion position of the bone screw. When the arch-shaped closing plate is not fixed, the fixed bone screw seat can be slightly rotated to adjust the insertion angle of the bone screw in the bone screw hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the connecting seat of the utility model;

[0021] Figure 3 It is a schematic diagram of the bow-shaped closing plate structure of the utility model.

[0022] In the figure: 1, support plate; 2, tibial rod; 3, adjustment seat; 4, connecting seat; 41, connecting groove; 42, fixing hole; 43, movable rod; 44, connecting column; 45, limiting nut;

[0023] 5. Closing seat; 51. Fixing screw; 52. Clamping hole; 53. Anti-skid ring; 6. Fixing bone screw seat; 61. Movable groove; 62. Reset spring; 7. Bow-shaped closing plate; 71. Bone screw hole; 72. Locking screw; 73. Locking nut; 74. Clamping groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-3The utility model provides the following technical solutions: a tibial intramedullary fixation device, comprising a support plate 1, a tibial rod 2 is inserted and connected in the middle of the support plate 1, an adjusting seat 3 is provided in the middle of the support plate 1, a connecting seat 4 is hinged at the bottom of the adjusting seat 3, a closing seat 5 is sleeved on the top of the adjusting seat 3, one end of the closing seat 5 is threadedly connected to a fixing screw 51, a connecting groove 41 is opened at the top of one side of the connecting seat 4, one end of the fixing screw 51 is threadedly connected to the connecting groove 41, a fixing hole 42 is provided at the bottom of the inner wall of the connecting groove 41, a movable rod 43 is inserted and connected in the fixing hole 42, a fixing bone screw seat 6 is sleeved on the outside of the movable rod 43, a movable groove 61 is opened on one side of the fixing bone screw seat 6, and a bow-shaped closing plate 7 is slidably connected on both sides of the movable groove 61, bone screw holes 71 are opened at the top and bottom of one side of the bow-shaped closing plate 7, a locking screw 72 is threadedly connected to the middle of the bow-shaped closing plate 7, and locking nuts 73 are threadedly connected to the two ends of the locking screw 72.

[0026] For a specific embodiment of the tibial intramedullary fixation device, please refer to Figure 3 A clamping groove 74 is provided at the top and bottom of the other side of the bow-shaped closing plate 7, and an anti-slip texture is provided on the inner wall of the clamping groove 74.

[0027] See also Figure 3 : After sliding the fixed bone screw seat 6 on the movable rod 43 and adjusting the position of the fixed bone screw seat 6, the locking screw 72 is rotated to squeeze the two arch-shaped closing plates 7 inward to clamp the movable rod 43 in the clamping groove 74.

[0028] For a specific embodiment of the tibial intramedullary fixation device, please refer to Figure 2 A connecting column 44 is provided at the top of the connecting seat 4, and a clamping hole 52 is opened at the other end of the closing seat 5, and the connecting column 44 is inserted and connected with the clamping hole 52.

[0029] See also Figure 2 : Rotate the connecting seat 4, adjust the angle of the connecting seat 4, install the closing seat 5, and insert the connecting column 44 into the clamping hole 52, rotate the fixing screw 51, install the fixing screw 51 into the connecting groove 41, fix the closing seat 5 and the connecting seat 4, and use the fixing screw 51 to support the two ends of the movable rod 43 to prevent the movable rod 43 from loosening.

[0030] For a specific embodiment of the tibial intramedullary fixation device, please refer to Figure 2 : The top of the connecting column 44 is threadedly connected to a limiting nut 45.

[0031] See also Figure 2 : Install the limiting nut 45 on the connecting column 44, tighten the limiting nut 45, connect the seat 4 and the closing seat 5 to clamp the adjusting seat 4, and fix the rotation angle of the adjusting seat 3.

[0032] For a specific embodiment of the tibial intramedullary fixation device, please refer to Figure 3 : Reset springs 62 are arranged on both sides of the inner wall of the movable groove 61.

[0033] See also Figure 3 : Pull the bow-shaped closing plate 7, adjust the position of the fixed bone screw seat 6, loosen the bow-shaped closing plate 7, and push the reset spring 62 inward to make the bow-shaped closing plate 7 automatically clamp the movable rod 43 in the clamping groove 74 to prevent the fixed bone screw seat 6 from falling, so as to facilitate the subsequent use of the locking screw 72 to fix the bow-shaped closing plate 7, and use the bow-shaped closing plate 7 to clamp the movable rod 43 to fix the insertion position of the bone screw hole 71.

[0034] For a specific embodiment of the tibial intramedullary fixation device, please refer to Figure 2 : An anti-slip ring 53 is provided at the bottom of the clamping hole 52.

[0035] See also Figure 2 : When one end of the connecting seat 4 is against the adjusting seat 3, the anti-skid ring 53 increases the friction force to prevent the connecting seat 4 from slipping.

[0036] The utility model provides a tibial intramedullary fixation device, and the specific usage method is as follows: insert the surgical tibial rod 2 and install the support plate 1, rotate the closing seat 5, adjust the approximate installation angle of the bone screw, insert the connecting column 44 into the clamping hole 52 and tighten the limiting nut 45, install the fixing screw 51 to fix the closing seat 5, when one end of the connecting seat 4 is against the adjusting seat 3, the anti-skid ring 53 increases the friction force to prevent the connecting seat 3 from slipping, use the connecting seat 4 and the closing seat 5 to clamp the support plate 1, fix the insertion angle of the bone screw, slide the fixed bone screw seat 6 on the movable rod 43, after adjusting the position of the fixed bone screw seat 6, rotate the locking screw 72, squeeze the two bow-shaped closing plates 7 inward, clamp the movable rod 43 in the clamping groove 74, fix the insertion height of the bone screw, and slightly rotate the fixed bone screw seat 6 when fixing the bow-shaped closing plate 7 to adjust the insertion angle of the bone screw in the bone screw hole 71.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tibial intramedullary fixation device, comprising a support plate (1), characterized in that: The middle part of the support plate (1) is connected with a tibial rod (2) through insertion, the middle part of the support plate (1) is provided with an adjustment seat (3), the bottom of the adjustment seat (3) is hinged with a connecting seat (4), the top of the adjustment seat (3) is sleeved with a closing seat (5), one end of the closing seat (5) is threadedly connected with a fixing screw (51), a connecting groove (41) is provided at the top of one side of the connecting seat (4), one end of the fixing screw (51) is threadedly connected to the connecting groove (41), and the bottom of the inner wall of the connecting groove (41) is provided with a fixing hole (42) ), a movable rod (43) is inserted into the fixing hole (42), a fixed bone screw seat (6) is sleeved on the outside of the movable rod (43), a movable groove (61) is opened on one side of the fixed bone screw seat (6), and a bow-shaped closing plate (7) is slidably connected on both sides of the movable groove (61), bone screw holes (71) are opened on the top and bottom of one side of the bow-shaped closing plate (7), a locking screw (72) is threadedly connected to the middle of the bow-shaped closing plate (7), and locking nuts (73) are threadedly connected to both ends of the locking screw (72).

2. A tibial intramedullary fixation device according to claim 1, characterized in that: A clamping groove (74) is provided at the top and bottom of the other side of the bow-shaped closing plate (7), and an inner wall of the clamping groove (74) is provided with an anti-slip texture.

3. The tibial intramedullary fixation device according to claim 1, characterized in that: A connecting column (44) is provided at the top of the connecting seat (4), a clamping hole (52) is provided at the other end of the closing seat (5), and the connecting column (44) is inserted and connected with the clamping hole (52).

4. A tibial intramedullary fixation device according to claim 3, characterized in that: The top end of the connecting column (44) is threadedly connected to a limiting nut (45).

5. The tibial intramedullary fixation device according to claim 1, characterized in that: Restoration springs (62) are provided on both sides of the inner wall of the movable groove (61).

6. The tibial intramedullary fixation device according to claim 3, characterized in that: An anti-slip ring (53) is provided at the bottom of the clamping hole (52).

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