CN204072305U - A kind of fracture of medial malleolus replacement and fixation guider - Google Patents

Abstract

The utility model discloses a guide device for medial malleolus fracture reduction and fixation, which comprises a fixed main body plate. The proximal end of the fixed main body plate is a straight plate, and the far end is an arc-shaped hook plate. The fixed hole at the proximal end is used to cooperate with the long handle guide sleeve and the Kirschner wire to lift and reduce the fracture fragment and to fix the fixed main plate. Anastomosis, two circular distal fixing holes are arranged side by side on the arc-shaped hook plate for cooperating with the short-handle guide sleeve and Kirschner wire to fix the fracture fragment, and two distal-end fixing holes are arranged side by side on the arc-shaped hook plate A rectangular hole is longitudinally arranged between the end fixing holes. The device has a simple structure, is convenient and quick to use, and can fix fractures firmly. It can also reduce the amount of X-ray exposure during the operation, and obtain satisfactory curative effect after the operation.

Description

A guide device for reduction and fixation of medial malleolus fracture

technical field

The utility model belongs to the field of medical equipment, in particular to a guide device for the reduction and fixation of medial malleolus fractures.

Background technique

Ankle fractures are common in bone and joint injuries of the extremities, and are often accompanied by fractures of the medial malleolus. The classic AO treatment method is to fix the medial malleolus fracture fragment with two hollow lag screws, which can exert pressure on the fracture end and also play an anti-rotation role, and the postoperative effect is satisfactory. However, in the course of clinical operation, two technical problems are often faced: one is how to effectively maintain the medial malleolus fracture after reduction. Currently, 1-2 cloth towel pliers are commonly used to clamp both ends of the fracture line in clinical practice. Since it is an unlimited clamp and often affects the insertion position of the Kirschner wire after clamping, it is necessary to maintain and pass the needle fixation belt after the bone block is reset. The second is that it is difficult to grasp the direction when two Kirschner wires are threaded parallel to the sagittal plane of the medial malleolus to fix the fracture end. It is often necessary to repeatedly confirm the position of the Kirschner wires under the "C" arm fluoroscopy, which not only increases the X-ray exposure of personnel, and repeated needle punctures often lead to the destruction of the medial malleolus fracture, which affects the reliability of fracture fixation. It is also easy to make patients with medial malleolus fractures have residual sequelae to varying degrees after surgery, and even cause lifelong disabilities.

Utility model content

Aiming at the technical problems raised by the background technology, the utility model provides a medial malleolus fracture reduction and fixation guiding device, which is used to solve the above problems.

The purpose of this utility model can be realized through the following technical solutions:

A medial malleolus fracture reduction and fixation guide, which includes a fixed main body plate, the proximal end of the fixed main body plate is a straight plate, and the distal end is an arc-shaped hook plate, and a circular proximal fixation plate is provided on the straight plate. The hole is used to cooperate with the long handle guide sleeve and the Kirschner wire to lift and reduce the fracture block and fix the fixed main body plate. There are two circular distal fixing holes arranged side by side on the arc-shaped hook plate, which are used to cooperate with the short handle guide sleeve and the Kirschner wire to fix the fracture fragment, and are arranged side by side between the two distal-end fixing holes on the arc-shaped hook plate A rectangular hole is arranged longitudinally. The rectangular hole is used for observing the fracture line and judging the reduction situation of the distal fracture block.

When the medial malleolus fracture reduction and fixation guide device is in use, the long handle guide sleeve and the short handle guide sleeve can be screwed into and fixed in the proximal fixing hole and the distal fixing hole respectively.

As a preferred technical solution, the inner walls of the proximal fixing hole and the distal fixing hole are threaded conical, and the tails of the long handle guide sleeve and the short handle guide sleeve are aligned with the proximal fixing hole and the distal end. The threaded conical shape of the end fixing hole matches. When in use, the external guide sleeve can be screwed into the fixing hole and stably fixed into one body.

As a preferred technical solution, the axis of the proximal fixing hole is perpendicular to the straight plate, and the axis of the distal fixing hole is consistent with the axis of the medial malleolus.

As a preferred technical solution, the length of the long-handle guide sleeve is 35-45mm, preferably 40mm, the length of the short-handle guide sleeve is 10-20mm, preferably 15mm, and the length of the long-handle guide sleeve or short The shank guide sleeve has an inner diameter of 2mm and an outer diameter of 4mm.

As a preferred technical solution, the thickness of the fixed main body plate is 2.5mm, the width of the fixed main body plate is 8mm, the length of the fixed main body plate is 40mm, and the H value of the curved hook plate is 1.0～ 2.5cm, H is the distance from the tip of the hook to the transition part between the straight plate and the curved hook plate.

The beneficial effects of the utility model:

Through the above-mentioned structural design, the medial malleolus fracture reduction and fixation guide device designed by the utility model has the following structural features: the arc-shaped hook plate at the far end adopts a curved surface structure design whose inner surface shape matches the surface shape of the inner malleolus bone of the human body. This greatly improves the structural compatibility and stability of the medial malleolus fracture reduction and fixation guide device; after the external long handle guide sleeve is fixed with the proximal fixation hole, the fracture fragment of the medial malleolus can be lifted and reset, and then the After the shank guide sleeve is inserted into the Kirschner wire, it is very easy to maintain the reduction of the bone fragment; and a rectangular hole designed along the longitudinal axis of the plate provides great convenience for observing the fracture line and judging the reduction of the distal fracture fragment. The axial direction of the distal fixation hole is designed to be consistent with the axis of the medial malleolus, ensuring that the direction of Kirschner wire penetration is parallel to the articular surface of the medial malleolus, reducing the exposure of X-rays during the operation, and assisting the surgeon to complete medial malleolus fractures better and faster The fixation operation with two hollow lag screws can effectively avoid complications such as failure of internal fixation and loss of reduction after operation. The guide device for reduction and fixation of medial malleolus fractures has the advantages of simple structure, convenient and quick use, and firm fracture fixation, which can also reduce X-ray exposure during operation and obtain satisfactory postoperative curative effect.

Description of drawings

Fig. 1 is a component diagram of a medial malleolus fracture reduction and fixation guide device.

Fig. 2 is a side view of the medial malleolus fracture reduction and fixation guide device.

Fig. 3 is a schematic diagram of the structure of the medial malleolus fracture reduction and fixation guide device in use.

Detailed ways

As shown in Figures 1 and 2, a medial malleolus fracture reduction and fixation guide device includes a fixed main body plate 8, the proximal end of the fixed main body plate 8 is a straight plate 1, and the distal end is an arc-shaped hook plate 2. The straight plate 1 is provided with a circular proximal fixing hole 3 for cooperating with the long handle guide sleeve 6 and the Kirschner wire to lift and reduce the fracture fragment and fix the fixed main body plate 8. The arc-shaped hook The shape of the curved surface on the inner surface of the plate 2 coincides with the surface shape of the malleolus in the human body. The arc-shaped hook plate 2 is provided with two circular distal fixing holes 4 in parallel for matching the short handle guide sleeve 7 and the Kirschner The needle fixes the bone fragment, and a rectangular hole 5 is arranged longitudinally between the two distal fixing holes 4 arranged side by side on the arc-shaped hook plate 2 . The rectangular hole 5 is used for observing the fracture line and judging the reduction of the distal fracture fragment. When the medial malleolus fracture reduction and fixation guide device is in use, the long handle guide sleeve 6 and the short handle guide sleeve 7 can be screwed into and fixed in the proximal fixing hole 3 and the distal fixing hole 4 respectively.

As a preferred technical solution, the inner walls of the proximal fixing hole 3 and the distal fixing hole 4 are threaded conical, and the tails of the long handle guide sleeve 6 and the short handle guide sleeve 7 are connected to the near end The threaded conical shape of the fixing hole 3 and the distal fixing hole 4 match. When in use, the external guide sleeve can be screwed into the fixing hole and stably fixed into one body.

As a preferred technical solution, the axis of the proximal fixing hole 3 is perpendicular to the straight plate 1 , and the axis of the distal fixing hole 4 is consistent with the axis of the medial malleolus.

As a preferred technical solution, the length of the long-handle guide sleeve 6 is 35-45mm, preferably 40mm, the length of the short-handle guide sleeve 7 is 10-20mm, preferably 15mm, and the length of the long-handle guide sleeve 6 or the inner diameter of the short handle guide sleeve 7 is 2mm, and the outer diameter is 4mm.

As a preferred technical solution, the thickness of the fixed main body plate 8 is 2.5 mm, the width of the fixed main body plate 8 is 8 mm, the length of the fixed main body plate 8 is 40 mm, and the H of the arc-shaped hook plate 2 The value is 1.0-2.5cm, and the H value is the distance from the hook tip to the transition part between the straight plate and the curved hook plate.

As shown in Fig. 3, at first according to the difference of patient's medial malleolus width, select suitable medial malleolus fracture reduction fixation guiding device (H value is different), make described fixation main plate 8 medial surface and medial malleolus cortical surface form match as far as possible, After hooking the arc-shaped hook plate 2 on the articular surface of the medial malleolus, install a long-handle guide sleeve 6 in the proximal fixing hole 3 of the straight plate 1, and hold the long-handle guide sleeve 6 to pull the medial malleolus proximally. The fracture fragment is properly pressurized, and the fracture line is observed with the help of the rectangular hole 5 on the arc-shaped hook plate 2 to judge the reduction of the fracture end. After the reduction is satisfactory, a Kirschner wire with a diameter of 2 mm is drilled through the long handle guide sleeve 6 to maintain the fixation . Install two short-handle guide sleeves 7 in the distal fixing hole 4, and then drill two Kirschner wires in the direction determined by the axis of the short-handle guide sleeve 7 (consistent with the axis of the medial malleolus), and place them on the "C"-shaped arm. After confirming the reduction of the fracture and satisfactory position of the Kirschner wire under fluoroscopy, the proximal Kirschner wire was pulled out and the fixed main body plate 8 was removed. Finally, two hollow lag screws with a diameter of 3.5 mm were drilled under the guidance of the distal Kirschner wire. Complete fracture reduction and compression fixation.

Claims (5)

1. A medial malleolus fracture reduction and fixation guide is characterized in that it comprises a fixed main body plate, the proximal end of the fixed main body plate (8) is a straight plate (1), and the far end is an arc-shaped hook plate (2), so The straight plate (1) is provided with a circular proximal fixing hole (3) for cooperating with the long handle guide sleeve (6) and the Kirschner wire to lift and reduce the fracture fragment and to fix the fixed main plate ( 8), the curved shape of the inner surface of the arc-shaped hook plate (2) matches the surface shape of the malleolus in the human body, and the arc-shaped hook plate (2) is provided with two circular distal fixing holes ( 4) It is used to cooperate with the short handle guide sleeve (7) and the Kirschner wire to fix the fracture fragment, and a rectangular hole is arranged longitudinally between the two distal fixing holes (4) arranged side by side on the arc-shaped hook plate (2) (5). 2. The guide device for medial malleolus fracture reduction and fixation according to claim 1, characterized in that the inner wall of the proximal fixation hole (3) and the distal fixation hole (4) is a threaded conical shape, and the long handle guide sleeve (6) and the tail portion of the short handle guide sleeve (7) are threaded conical shapes matched with the proximal fixing hole and the distal fixing hole. 3. The medial malleolus fracture reduction and fixation guide according to claim 1 or 2, characterized in that the axis of the proximal fixation hole (3) is perpendicular to the straight plate (1), and the distal end The axial direction of the fixing hole (4) is consistent with the axis of the inner malleolus. 4. The guide device for medial malleolus fracture reduction and fixation according to claim 1 or 2, characterized in that the length of the long handle guide sleeve (6) is 35-45 mm, and the length of the short handle guide sleeve (7) is 10 mm. ~20mm, the inner diameter of the long handle guide sleeve (6) or the short handle guide sleeve (7) is 2mm, and the outer diameter is 4mm. 5. The guide device for medial malleolus fracture reduction and fixation according to claim 1 or 2, characterized in that the thickness of the fixed body plate (8) is 2.5mm, the width of the fixed body plate (8) is 8mm, and the The length of the fixed main body plate (8) is 40mm, and the H value of the arc-shaped hook plate (2) is 1.0-2.5cm.