Minimally invasive accurate positioning device for femoral intercondylar fracture screw

Abstract

The invention discloses a minimally invasive accurate positioning device for a femoral intercondylar fracture screw, and belongs to the technical field of medical treatment. The device comprises a positioning sleeve, a needle inserting assembly and an external thread, wherein one end of the positioning sleeve is fixedly installed on the outer surface of the needle inserting assembly; and the needle inserting assembly is composed of a sleeve outer edge, an installation bearing, a needle inserting sleeve, a rotary threaded shaft, a rotary knob, an outer ejection spring, an arc-shaped guider anddisinfection wiping cotton. According to the invention, the needle inserting assembly is installed, the diameter of the needle inserting sleeve can contain the size of the internal fixation screw, theneedle inserting sleeve part can be screwed into a bone fracture end for pressurization, sawtooth structures are arranged at the positions, close to the bone surface, of the needle inserting sleeve part and a needle withdrawing sleeve part for assisting in fixation, the needle inserting assembly can play a role in pressurizing the bone fracture end, assists in insertion of a Kirschner wire and assists in firm fixation of the screw and a steel plate, and details can be adjusted according to clinical medical application conditions, so that positioning is accurate, operation is minimally invasive, accurate positioning of the femoral intercondylar fracture screw is achieved, and a safe and efficientfemoral intercondylar fracture internal fixation operation is pursued.

Description

technical field [0001] The invention belongs to the field of medical technology, in particular to a minimally invasive precise positioning device for femoral intercondylar fracture screws. Background technique [0002] Femoral intercondylar fractures are often caused by wedge force or knee joint extension or flexion caused by direct external forces. Indirect external forces in different directions can cause femoral intercondylar fractures. This disease is prone to separation of bone fragments without collapse, prone to "T", "Y", "V" and comminuted fractures, difficult to reset and difficult to maintain reduction, resulting in femoral condyle and tibial plateau, patellofemoral joint Destruction, changing the normal anatomical axis and mechanical axis of the knee joint, destroying the normal load and conduction of the knee joint. Therefore, open reduction and internal fixation should be performed as early as possible for femoral intercondylar fractures with poor reduction. C...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the problem that the traditional positioning device cannot realize the precise positioning of the screw during the operation, and it is easy to cause multiple nails to cause certain damage. Many lag screws are required, which will cause certain damage. Traditional positioning devices are mainly suitable for femoral neck fractures. For "T", "Y", "V" and comminuted femoral intercondylar fractures, the structure of the device needs to be adjusted to adapt The problem of internal fixation of this type of fracture, and the proposed minimally invasive and precise positioning device for femoral intercondylar fracture

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