CN210644159U

CN210644159U - Guider for fixing lag screw of internal ankle bone fracture

Info

Publication number: CN210644159U
Application number: CN201921052116.4U
Authority: CN
Inventors: 袁堂波; 覃健; 刘军; 蔡大卫; 陈中
Original assignee: Sir Run Run Hospital Nanjing Medical University
Current assignee: Sir Run Run Hospital Nanjing Medical University
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-06-02
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a guider of lag screw for fixing fracture of internal ankle bone, which comprises a clamping device, wherein the clamping device comprises a shell, a gear is arranged in the middle of the shell, two ends of the shell are respectively provided with a limiting piece vertical to the shell, the end part of the limiting piece is provided with a rack penetrating into the shell, and the two racks are both meshed with the gear; the guide device comprises a pair of vertically arranged fixing rings, the two fixing rings are fixedly connected through a connecting rod, and one fixing ring is hinged with the hinge rod; the fixed ring is internally sleeved with guide cylinders, and the two guide cylinders are arranged in parallel. The utility model discloses can greatly reduce the offset that the hollow drill vibrations lead to.

Description

Guider for fixing lag screw of internal ankle bone fracture

Technical Field

The utility model belongs to the field of medical equipment, especially, relate to a lag screw's director for fixing fracture of ankle bone in.

Background

Ankle joint fracture is common in limb bone joint injury, and often accompanies the fracture of the internal ankle, in the clinical treatment process, often appear the problem that the fracture piece of the internal ankle is difficult to maintain effectively after restoring, maintain through the method of the clamp and cause the influence to the use of the kirschner wire, and even under the condition that does not have the influence, the kirschner wire often is difficult to imbed to the predetermined position accurately, the direction is difficult to hold when the kirschner wire fixes the fracture end and needs to confirm the position of the kirschner wire repeatedly, not only has increased the X line exposure of medical staff, and it often causes the fracture piece of the internal ankle to destroy and influence the firm nature of fracture fixation repeatedly to wear the needle, it is easy to make the patient of the fracture of the internal ankle remain sequela of different degrees too after the operation, even cause lifelong disability, in addition, there is no relevant auxiliary device in the prior art simple structure, easy to use, excellent in.

A chinese patent with publication number CN204484272U discloses an ankle bone fracture reduction guider, which can be divided into a head, a handle and a neck, the head is provided with a through hole for passing a k-wire, the position and direction of the k-wire are limited by the through hole, the surface of the head contacting with the ankle bone is a concave curved surface, the curved surface matches with the shape of the ankle bone, the curved surface is provided with a pointed bulge protruding outwards, the head is fixed on the ankle bone by the pointed bulge, the ankle bone fracture reduction guider is held by a hand holding part, and the reduction maintenance of the ankle bone is realized.

However, the above-mentioned reduction guide for fracture of medial malleolus has the following disadvantages: although the through hole of the head can keep the kirschner wire in a parallel direction, the head lacks a stable fixing device, and when the drill bit is used for punching, all bone holes are easily deviated due to the vibration of the drill bit (due to the small size of the inner ankle bone, the punching position of the drill bit is in the middle of the inner ankle bone as much as possible in order to reduce the risk that the inner ankle bone is cracked and broken), so that the inner ankle bone is cracked and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the not enough of background art provides a lag screw's director for fixing ankle bone fracture in, it can greatly reduce the skew that the core drill vibrations lead to.

The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:

a guider for fixing a lag screw for internal ankle bone fracture comprises a clamping device, wherein the clamping device comprises a shell, a gear is arranged in the middle of the shell, limiting pieces perpendicular to the shell are arranged at two ends of the shell, racks penetrating into the shell are arranged at the end parts of the limiting pieces, and the two racks are meshed with the gear;

the guide device comprises a pair of vertically arranged fixing rings, the two fixing rings are fixedly connected through a connecting rod, and one fixing ring is hinged with the hinge rod; the fixed ring is internally sleeved with guide cylinders, and the two guide cylinders are arranged in parallel.

Furthermore, a brake wheel is arranged on one side, positioned on the gear, in the shell, a sliding rail for the brake wheel to slide is arranged in the shell, and the brake wheel is meshed with and separated from the brake wheel and the gear by sliding on the sliding rail; the brake wheel is connected with a sliding block positioned outside the shell, the shell is provided with a sliding groove for the sliding of the sliding block, and the sliding block drives the brake wheel to slide on the sliding rail by sliding in the sliding groove.

Furthermore, the surface of the sliding block is provided with anti-skid lines.

Further, the guide cylinder is in threaded connection with the fixing ring.

Furthermore, one end of the guide cylinder, which faces the clamping device, is provided with anti-skid sawteeth.

The utility model adopts the above technical scheme to compare with prior art, have following technological effect:

1. the guider of the utility model utilizes the lower limiting plate to clamp the inner ankle bone, thereby leading the guide cylinders to be always aligned with the middle position of the inner ankle bone, greatly reducing the position deviation caused by the vibration of the hollow drill, and simultaneously, the two guide cylinders are arranged in parallel, thereby ensuring that the two bone holes are always parallel;

2. the utility model is simple in operation, stability is good, greatly reduces the risk of inside ankle bone fracture.

Drawings

FIG. 1 is a schematic view showing the positional relationship between the guide and the human skeleton in this embodiment;

FIG. 2 is a view taken along line A of FIG. 1;

FIG. 3 is a schematic view for showing a connection structure of a gear and a spacing piece;

fig. 4 is a schematic view for embodying a brake wheel and slider connecting structure.

In the figure, 1, a clamping device; 11. a housing; 12. a gear; 13. a limiting sheet; 131. a rack; 2. a guide device; 21. a fixing ring; 22. a hinged lever; 23. a guide cylinder; 231. anti-skid sawteeth; 3. a brake wheel; 31. a slide rail; 32. a slider; 321. a chute; 322. anti-skid lines; 4. the medial malleolus bone; 41. a fracture layer; 5. a tibia; 6. a fibula; 7. the talus.

Detailed Description

The technical scheme of the utility model is further explained in detail with the attached drawings as follows:

a guider for fixing a lag screw for internal ankle bone fracture, as shown in figures 1, 2, 3 and 4, comprises a clamping device 1, wherein the clamping device 1 comprises a shell 11, a gear 12 is arranged in the middle of the shell 11, two ends of the shell 11 are respectively provided with a limiting piece 13 perpendicular to the shell 11, the end part of each limiting piece 13 is provided with a rack 131 penetrating into the shell 11, and the two racks 131 are respectively meshed with the gear 12.

The outer side of the shell 11 is positioned in the middle of the two limiting pieces 13, and is hinged with a guide device 2 through a hinge rod 22, the guide device 2 comprises a pair of vertically-arranged fixing rings 21, the two fixing rings 21 are fixedly connected through a connecting rod, and one fixing ring 21 is hinged with the hinge rod 22; the fixed ring 21 is internally sleeved with a guide cylinder 23, the two guide cylinders 23 are arranged in parallel, and the guide cylinder 23 is connected with the fixed ring 21 through threads. The guide cylinder 23 is provided with anti-slip serrations 231 at an end thereof facing the clamp device 1.

A brake wheel 3 is arranged on one side, located on the gear 12, in the shell 11, a slide rail 31 for the brake wheel 3 to slide is arranged in the shell 11, and the brake wheel 3 is meshed with and separated from the brake wheel 3 and the gear 12 through sliding on the slide rail 31; the brake wheel 3 is connected with a slide block 32 positioned outside the shell 11, the shell 11 is provided with a slide groove 321 for the slide block 32 to slide, and the slide block 32 drives the brake wheel 3 to slide on the slide rail 31 by sliding in the slide groove 321. The surface of the slide block 32 is provided with anti-skid grains 322.

Description of specific embodiments:

the medial malleolus structure is shown in fig. 1 and comprises a tibia 5, a fibula 6 and a talus 7, and the medial malleolus 4 is located at the bottom of the left side of the tibia 5. The patient, due to high exercise intensity or other reasons, has a fractured layer 41 between the medial malleolus 4 and the tibia 5, requiring the use of lag screws to reattach and secure the medial malleolus 4 and tibia 5 together. The details are as follows.

1. The position-limiting pieces 13 are pulled outwards first (due to the principle that the two racks 131 are both meshed with the gear 12, the distance between the outward ends of the two position-limiting pieces 13 is the same, so that the guiding device 2 is always positioned in the middle of the two position-limiting pieces 13) until the distance between the two position-limiting pieces 13 is consistent with the width of the inner ankle bone 4.

2. Two stopper pieces 13 are inserted into the gaps on both sides of the medial malleolus 4 (gaps between the medial malleolus 4 and the other bones on both sides thereof).

3. The sleeve sliding block 32 causes the brake wheel 3 to engage with the gear 12, thereby fixing the gear 12 against rotation, thereby fixing the two stopper pieces 13.

4. The position of the guide means 2 is adjusted by the hinge rod 22 so that the guide cylinder 23 hangs down and abuts against the medial malleolus 4, and if the distance of the guide cylinder 23 does not contact the medial malleolus 4, the guide cylinder 23 can be secondarily adjusted by rotating until the anti-slip saw teeth 231 of the guide cylinder 23 abut against the medial malleolus 4.

5. The hollow drill is inserted into the two guide cylinders 23 in sequence to punch holes, the holes are punched from the bottom of the inner ankle bone 4 side to the tibia 5, the holes penetrate through the fracture layer 41, the holes are finally punched into the tibia 5 to form two bone holes, namely, the bone holes are located in the middle of the inner ankle bone 4 and are in parallel, and finally the bone holes are penetrated through by the lag screws for fixation.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope. Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A guide for a lag screw for fixation of an internal ankle fracture, comprising: the clamping device comprises a shell, a gear is arranged in the middle of the shell, limiting pieces perpendicular to the shell are arranged at two ends of the shell, racks penetrating into the shell are arranged at the end parts of the limiting pieces, and the two racks are meshed with the gear;

2. A lag screw guide for fixation of an internal ankle fracture according to claim 1, wherein: a brake wheel is arranged on one side, positioned on the gear, in the shell, a sliding rail for the brake wheel to slide is arranged in the shell, and the brake wheel is meshed with and separated from the brake wheel and the gear by sliding on the sliding rail; the brake wheel is connected with a sliding block positioned outside the shell, the shell is provided with a sliding groove for the sliding of the sliding block, and the sliding block drives the brake wheel to slide on the sliding rail by sliding in the sliding groove.

3. A lag screw guide for fixation of an internal ankle fracture according to claim 2, wherein: the surface of the sliding block is provided with anti-skid grains.

4. A lag screw guide for fixation of an internal ankle fracture according to claim 1, wherein: and the guide cylinder is in threaded connection with the fixing ring.

5. A lag screw guide for fixation of an internal ankle fracture according to claim 1, wherein: and one end of the guide cylinder, which faces the clamping device, is provided with anti-skid sawteeth.