Patella fracture threading device with threading, tightening and knotting functions

Abstract

The invention discloses a patella fracture threading device with threading and tightening knotting functions. The patella fracture threading device comprises a grab handle, a connecting rod, an arc section rod, a transition section, a micro motor, an outer cylinder, a rotating shaft rod, patella fixing claws and patella fixing clamps. The device can be used in an arthroscopic patella internal fixation operation, and also can be used in a tissue incision patella internal fixation operation; wherein the radian of the thread passing device can be automatically and flexibly adjusted according to the radian of the patella surface, so that the thread passing device can be better attached to the patella surface, and the obstruction during thread passing is reduced; according to the additionally designed knotting device part, a steel wire or a fixing line is tightened through electric control, and the position where the inner fixing line is tightened through medical thermoplastic resin is condensed and fixed. During knotting operation of an internal fixing wire or a steel wire, the tightening force can be monitored and mastered in real time, and an internal fixing wire knot can be pressed and fixed by using a plastic wire clamp; and the patella fixing clamp can be used for clamping and fixing the broken patella.

Description

technical field [0001] The invention belongs to the field of internal fixation instruments for patella fractures, and in particular relates to a patellar fracture wire-passing device with functions of threading and tightening and knotting. Background technique [0002] The cartilage surface of the patella forms a joint with the front of the femoral condyle, which helps to extend the knee. If a patella fracture occurs, it is a fracture of the internal joint. It is required to restore the complete normal anatomical relationship of the articular surface, and repair the quadriceps femoral aponeurosis. function and prevention of complications of osteoarthritis; [0003] At present, the surgical methods for patellar fractures are mainly divided into the following categories: wire purse-string internal fixation, wire internal fixation, screw internal fixation, etc.; in patellar fracture internal fixation, wire or wire is often used to fix the broken end. It is necessary to pass th...

AI Technical Summary

Problems solved by technology

[0003] At present, the surgical methods for patella fractures are mainly divided into the following types: wire purse string suture internal fixation, steel wire internal fixation, screw internal fixation, etc.; in internal fixation of patella fractures, it is often necessary to use steel wire or thread for stump fixation. It is necessary to pass the steel wire or wire through the patella between the patella and the femur, but when performing this operation at present, there are the following problems: 1) the structure of the current patella threader is straight or fixed, but due to the patella The bone surface has a certain radian and the radian is different for different individuals. During the threading process, it cannot be adjusted according to the radian of the patella itself, which makes the threading process more difficult and time-consuming; 2) After the fixed wire or steel wire bypasses the patella, it needs to Manually tighten the steel wire or fixed line, and then tie a knot to fix it. The process is cumbersome and time-consuming, and manual operation cannot guarantee the degree of tightening

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