Kirschner wire external fixing mechanism

Abstract

The invention discloses a kirschner wire external fixing mechanism. The radial direction of through grooves in connecting blocks of the mechanism is adjustable, each connecting block can be fixed to kirschner wires with different diameters, and the multiple connecting blocks are adjusted independently, so that the mechanism can connect the multiple kirschner wires with different diameters into a whole at the same time, and the limitation of the thickness of the kirschner wires is avoided. Moreover, certain connecting blocks are arranged in the mechanism, the other connecting blocks are movableconnecting blocks, and based on fixed connecting blocks, the included angle formed by the axes of the through grooves in the two connected connecting blocks in space is adjusted and locked, so that the fixation of the mechanism and the kirschner wires is not limited by the driving angle of the kirschner wires. Therefore, when the kirschner wires are externally fixed by the kirschner wire fixing mechanism, the mechanism is not limited by the diameters and the driving angles of the kirschner wires. By using the mechanism, after fracture reduction, the bone position can be maintained, and fracture redisplacement after reduction is prevented.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a Kirschner wire external fixation mechanism, which is suitable for auxiliary reduction treatment of humeral supracondylar fractures in children. Background technique [0002] Supracondylar fracture of humerus in children is a common and frequently-occurring disease in pediatric orthopedics. Supracondylar humeral fractures in children refer to fractures within 2cm above the medial and medial condyles of the distal humerus. Because there is a coronoid fossa in front of the supracondylar humerus and an olecranon fossa in the back, there is only a very thin bone plate between the two fossa. Weak point of the humerus and therefore a predisposed site for fractures. [0003] Manual reduction and splint external fixation require high conservative treatment. After successful reduction, the incidence of splint displacement is high, cubitus valgus is often left behind, and Volkmann bloody m...

AI Technical Summary

Problems solved by technology

[0006] First, because the doctor's experience is often used to insert the Kirschner wires, it is easy to cause the direction of the Kirschner wires to shift, causing two or three Kirschner wires to be non-parallel and at an angle in space.

However, the axes of the perforations on the disclosed crossed Kirschner wire external fixation device are all arranged in parallel, so two angled Kirschner wires cannot be fixed;

[0007] Second, the size adjustment of multiple perforations on the disclosed crossed Kirschner wire external fixation device cannot fix two Kirschner wires with different thicknesses;

[0008] Third, the adjustment of the size of the perforation depends on the force provided by the spring, and the stability of the force is poor, thereby reducing the fixing strength between the device and the Kirschner wire, and there is still a situation where the Kirschner wire is displaced;

[0009] Fourth, the three Kirschner wires cannot be externally fixed, and there are defects in use

Images