Knee joint anterior cruciate ligament tibial insertion avulsion fracture reduction fixing and guiding device

A technology for anterior cruciate ligament and avulsion fractures, applied in the field of medical devices, can solve problems such as difficult positioning, difficult fixation, and poor accuracy, and achieve the effects of improving penetration efficiency, increasing stability, and increasing accuracy

Pending Publication Date: 2022-01-21
LUOYANG ORTHOPEDIC TRAUMATOLOGICAL HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for severe avulsion fractures of the tibial insertion, if Kirschner wires are used for fixation, because the Kirschner wires are thinner, the fixation effect for larger fracture gaps is poor, the rigidity is low, it is not easy to fix, and it is easy to dislocate in the later stage; Hollow screws need to be used for positioning. At present, for the use of hollow screws, the guide pin is generally inserted first, then the hollow hole is drilled, the depth is measured, and finally the hollow screw is screwed into the hollow screw through the guide pin for fixation. However, for smaller tibial insertions For avulsion fractures, it is not easy to locate the avulsed bone block directly by using the guide pin, and it is difficult to fix it. The hollow screw is introduced only through the guide pin, and the positioning is difficult when the guide pin is opened, and the accuracy is poor. Perforation, causing secondary harm to the patient

Method used

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  • Knee joint anterior cruciate ligament tibial insertion avulsion fracture reduction fixing and guiding device
  • Knee joint anterior cruciate ligament tibial insertion avulsion fracture reduction fixing and guiding device
  • Knee joint anterior cruciate ligament tibial insertion avulsion fracture reduction fixing and guiding device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Please refer to Figure 1-3 , a knee joint anterior cruciate ligament avulsion fracture reduction and fixation guide device, including a sleeve 1; the inside of the sleeve 1 is provided with a frame 2, and the frame 2 is a transparent cuboid structure at both ends; The upper edge of the frame body 2 is provided with a chute 7, the chute 7 is provided with a moving block 8, one side of the moving block 8 is connected with a connecting rod 9, and the other end of the connecting rod 9 extends to the frame Inside the body 2, the other end of the connecting rod 9 is connected with an adjustment piece 10, and the other end of the adjustment piece 10 is connected with an inner cylinder 3, and the inner cylinder 3 is fixed inside the frame body 2 through the adjustment piece 10, and the inner cylinder 3 The lower end of the inner cylinder is flush with the sleeve 1, and the inner cylinder 3 can move horizontally inside the frame body 2 through the adjustment member 10;

[0048...

Embodiment 2

[0050] Please refer to Figure 3-4 , on the basis of Embodiment 1, the four edges of the upper end of the frame 2 are provided with chute 7, and the edges of the frame 2 in the same horizontal plane are provided with four chute 7, each set of chute 7 A moving block 8 is provided, and the cross section of the chute 7 is a "concave" structure, and a slide block 12 is connected below the moving block 8, and the slide block 12 is arranged inside the chute 7, and the slide block 12 and chute 7 matching sliding connection.

[0051] There are three fixed pieces 4, and the three fixed pieces 4 are all arranged on the same plane at the bottom of the sleeve 1, and the three fixed pieces 4 form three vertices of a triangle on one plane. The adjusting member 10 is provided with four, respectively the first telescopic member 21, the second telescopic member 22, the third telescopic member 23, and the fourth telescopic member 24. The first telescopic member 21, the second telescopic member...

Embodiment 3

[0055] Please refer to Figure 5-8 , on the basis of Embodiment 1, a through hole is opened in the center of the moving block 8, and a rotating shaft 14 is arranged in the through hole, and the rotating shaft 14 is rotationally connected with the moving block 8, and the top of the rotating shaft 14 is connected with a rotating shaft. Block 13, the other end of the rotating shaft 14 extends to the inside of the slider 12, the inside of the sliding block 12 is a hollow structure, and the other end of the rotating shaft 14 is connected with a gear 15.

[0056] Both sides of described gear 15 are symmetrically provided with first moving rod 16 and second moving rod 17, and described first moving rod 16 and second moving rod 17 are provided with rack 20 near the side of gear 15, through rack 20 is meshed with the gear 15, the other ends of the first moving rod 16 and the second moving rod 17 extend to the outside of the slider 12, and are connected with a top block 18, the first mo...

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Abstract

The invention discloses a knee joint anterior cruciate ligament tibial insertion avulsion fracture reduction fixing and guiding device which comprises a sleeve; a frame body is arranged in the sleeve, and the frame body is of a cuboid structure with two transparent ends; a sliding groove is formed in the upper edge of the frame body, a moving block is arranged on the sliding groove, one side of the moving block is connected with a connecting rod, the other end of the connecting rod extends into the frame body, the other end of the connecting rod is connected with an adjusting piece, the other end of the adjusting piece is connected with an inner cylinder, the inner cylinder is fixed into the frame body through the adjusting piece, the lower end of the inner cylinder is flush with the sleeve, and the inner cylinder can horizontally move in the frame body through the adjusting piece; the sleeve with the positioning hole is arranged, an avulsion fracture block is fixed through the fixing needle, then the guide needle is guided in through the inner cylinder arranged in the sleeve, the avulsion fracture block is prevented from shifting when the guide needle is driven in, and the accuracy of guide needle positioning is improved.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to a reduction and fixation guide device for avulsion fracture of anterior cruciate ligament tibial insertion of knee joint. Background technique [0002] The avulsion fracture of tibial insertion refers to the avulsion fracture at the insertion point of the bone caused by the upper end of the tibia under the pull of external force. It is a special kind of fracture. After the avulsion fracture occurs, local Swelling and pain, as well as limitation of motion, are very similar to most soft tissue injuries. If the avulsion fracture of the tibial tuberosity is not displaced, or if there is a slight displacement, and the general fracture gap does not exceed 0.5cm, conservative treatment can be used at this time. It can be fixed with plaster for 4 to 6 weeks, and then gradually To exercise the function of the knee joint. If the displacement of the tibial tubercle...

Claims

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Application Information

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IPC IPC(8): A61B17/88A61B17/86
CPCA61B17/88A61B17/8897A61B17/864
Inventor 代朋乙
Owner LUOYANG ORTHOPEDIC TRAUMATOLOGICAL HOSPITAL
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