A self-locking pressurized intramedullary nail capable of tightly joining the two ends of the fracture

Abstract

A self-locking pressurizing intramedullary nail capable of making the two ends of a fracture portion tightly joined comprises an intramedullary nail body. An anti-turning protrusion is arranged at the near end of the intramedullary nail body. A core is arranged in the intramedullary nail body, an inner locking pin is hinged to the position, located in the intramedullary nail body, on the core, and an inclined hole for the inner locking pin to penetrate through is formed in the intramedullary nail body and is inclined upwards from interior to exterior. An axial driving device which is connected with the core and makes the core axially move is arranged at one end of the intramedullary nail body. When the intramedullary nail is installed for use, the intramedullary nail is fixed to the near end of the fracture portion through the anti-turning protrusion, the core in the intramedullary nail body is made to move towards the near end of the intramedullary nail body through the axial driving device, so that the inner locking pin penetrates through the inclined hole of the intramedullary nail body and enters the inner wall of the marrow cavity, two opposite acting forces are formed at the two ends of the fracture portion, the ends of the fracture portion are pressurized, and thus the two ends of the fracture portion can be tightly joined. When the intramedullary nail is taken out, the operations are performed reversely, the inner locking pin is taken back into the intramedullary nail body through the driving device, and then the intramedullary nail is taken out through external force.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a self-locking pressurized intramedullary nail for orthopedic fixation that can tightly join the two ends of a fracture. Background technique [0002] Currently, intramedullary nails, steel plates, and external fixators are usually used in the surgical treatment of long tubular bone shaft fractures. When in use, put the intramedullary nail into the medullary cavity, and then make a corresponding through hole on the healthy long cortical bone corresponding to the locking nail hole of the intramedullary nail, so that the locking nail can pass through the long tube The proximal and distal keyholes of the cortical bone and the intramedullary nail achieve the locking effect. When using this type of intramedullary nail, it is necessary to connect and fix the proximal and distal ends with locking nails. During installation, the intramedullary nail is inserted into the medulla...

AI Technical Summary

Problems solved by technology

In the process of fixing the fractured long tubular bone, one end of the intramedullary needle body acts on the long tubular bone at one end of the fracture, and when the internal locking pin is used to fix the long tubular bone, the tip of the inner locking pin is aligned with the other end of the fracture. The long tubular bone has a forward force. In this way, for the long tubular bone, it is easy to form an opposite force at the fracture site, and it is difficult to achieve the purpose of tight joint at the two ends of the fracture site, so that the healing of the fracture is limited and the recovery time is long.

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