Internal fixing device for olecranal fracture

Abstract

The invention provides an internal fixing device for olecranal fracture, which comprises two fixing steel nails bridged on two sides of the fracture part of the ulna, the left and right sides of the ulna are respectively provided with a fixing steel nail, one end of each of the left and right fixing steel nails is nailed into the ulna bone at the near end of the ulna, and the other end of each of the left and right fixing steel nails is nailed into the ulna bone at the near end of the ulna. The other ends of the left fixing steel nail and the right fixing steel nail are fixedly connected at the distal ulna end through bolts. Two fixing steel nails are adopted for fixing from the left side and the right side of the ulna, and the fixing mode is stable and reliable; one ends of the two fixing steel nails are nailed into the bone through the hook-shaped structures, so that a better fixing effect is achieved; the other end of the fixing steel nail is locked and fixed through the connecting bolt, the fixing steel nail cannot fall off, the two fixing steel nails can better cooperate to work, and the operation effect is improved.

Description

technical field [0001] The invention relates to the technical field of fracture fixation devices, and specifically discloses an internal fixation device for olecranon fractures. Background technique [0002] Olecranon fractures account for about 10% of all upper extremity fractures, most of which are simple two-part fractures. Commonly used internal fixation methods for the treatment of olecranon fractures include Kirschner wire-tension bands, reconstruction plates, and anatomical plates. Among them, the application of Kirschner wire-tension band fixation is considered to be the gold standard for the treatment of simple olecranon fractures, but it is not suitable for oblique or comminuted olecranon fractures. During the fixation of comminuted olecranon fractures, the iatrogenic shortening and displacement of the semilunar notch of the olecranon is prone to occur, resulting in abnormal alignment between the articular surface of the trochlear and the semilunar notch, affectin...

AI Technical Summary

Problems solved by technology

During the fixation of comminuted olecranon fractures, the iatrogenic shortening and displacement of the semilunar notch of the olecranon is prone to occur, resulting in abnormal alignment between the articular surface of the trochlear and the semilunar notch, affecting joint activities and eventually leading to the occurrence of traumatic osteoarthritis

Reconstruction plate can also be used in the treatment of olecranon fractures, but its use has certain limitations because of its unreliable fixation of the fracture fragments and occasional screw withdrawal, affecting fracture healing and even causing skin irritation

The emergence of locked anatomical olecranon plates has theoretically solved the problem of screw withdrawal. However, in clinical application, it has been found that the ulnar olecranon anatomical locked plates are still too wide, and most patients can touch the plates and screws under the skin of the elbow, especially in those who are thin or thin. In young female patients, the outline of the steel plate can be seen even when the joint is flexed, which seriously affects the appearance, and the protruding steel plate is easy to cause irritation to the skin, and the pain after accidental collision is unbearable

In addition, the proximal end of the steel plate does not match well with the olecranon, so pre-bending the steel plate is often required. When the steel plate is not well pre-bent, it will often affect the movement of the tip of the olecranon in the olecranon fossa. In order to avoid similar situations, common solutions The method is to directly remove the proximal screw hole, but for olecranon tip fractures, removal of the proximal screw hole makes it difficult or difficult to effectively fix the bone fragment, and the risk of displacement of the fracture fragment due to the traction of the triceps brachii increases after surgery

It can be seen that the internal fixation currently used for the treatment of olecranon fractures is insufficient, and the most prominent problem in the treatment of olecranon fractures is the "protrusion" of internal fixation, so the problem of reducing internal fixation irritation needs to be solved urgently

Images