Self-locking elastic pressurizing intramedullary needle

Abstract

The invention discloses a self-locking elastic pressurizing intramedullary needle which comprises an intramedullary needle body, the intramedullary needle body comprises a self-drilling and self-tapping type cutting edge, a bone thread A, a reverse cutting pin cutting edge, a locking thread and a self-drilling cutting edge, the two ends of the locking thread are connected with the self-drilling cutting edge and the reverse cutting pin cutting edge respectively, the reverse cutting pin cutting edge is provided with the bone thread A, a self-drilling and self-tapping type cutting edge is formed in the position, at the top end of the bone thread A, of the reverse cutting pin cutting edge, and a locking tail cap is connected to the locking thread of the intramedullary needle body in a sleeving mode; and the locking tail cap comprises an internal thread A, a self-locking conical surface A, a bone thread B, a self-tapping cutting edge, an external hexagonal mechanism A and a step surface, and the self-locking conical surface A is formed in the external hexagonal mechanism A. According to the self-locking elastic pressurizing intramedullary needle, minimally invasive approach can be achieved, stability is improved, the intramedullary needle is automatically taken out by disassembling the tail cap, and the problem that the needle is difficult to take out after fracture healing is solved.

Description

technical field [0001] The invention relates to the technical field of pressurized intramedullary nails, in particular to a self-locking elastic pressurized intramedullary nail. Background technique [0002] The clavicle is an S-shaped frame between the manubrium sternum and the acromion, and is the only bony support connecting the upper limbs to the trunk. The clavicle is located under the skin and is superficial. It is prone to fracture when subjected to external force, and the incidence rate accounts for 5% to 10% of systemic fractures. Mostly occurs in children and young adults. There are two surgical methods for clavicle fractures: the first is internal fixation with Kirschner wires. The second is internal fixation with clavicle open reduction, plate and screw. The first type of Kirschner wire internal fixation for clavicle fractures has the advantages of simple operation, relatively small trauma, and relatively small incisions. It may even be unnecessary to make inc...

AI Technical Summary

Problems solved by technology

The biggest disadvantage is that the trauma is large, the scar formation affects the appearance, and young patients need a second operation to remove the internal fixation

Significantly increased suffering and economic and psychological burden

Images