Minimally invasive surgical instrument for fracture of middle and far-end junction part of humerus

Abstract

The invention relates to a minimally invasive surgical instrument for fracture of a middle and far-end junction part of a humerus, which comprises a steel plate, a sleeve, a sleeve core and a guider,wherein the steel plate is longitudinally provided with a connecting hole connected with a humerus screw, the guider is an L-shaped guider, one side of the guider is provided with a positioning through hole vertical to the other side, the periphery of the positioning through hole of the lower end surface of the side is provided with a positioning convex pin; the positioning through hole of the lower end surface of the side sleeves the upper end of a positioning screw of the steel plate, and the positioning screw of the steel plate is matched and arranged on a positioning screw hole of the steel plate; the positioning convex pin is inserted into a corresponding positioning concave hole of the steel plate to form corresponding fit, the other side of the guider is longitudinally provided withguide holes which are arranged and correspond to the connecting holes on one side of the steel plate one by one, the sleeve core is inserted into the sleeve and penetrates through a guide hole of theguider together with the sleeve, and the lower end is opposite to the connecting holes corresponding to the steel plate. Compared with the fixation of the posterior side of the humerus, the instrument is safer and more reliable, reduces the distance of the distal screw hole, increases the fixation quantity of the distal screws, and can perform anatomical restore on a diaphysis.

Description

technical field [0001] The minimally invasive surgical instrument for fractures of the mid-distal humerus is a special instrument for performing minimally invasive openings on the fractures of the mid-distal humerus and fixing both sides of the fracture junction with plates and screws. Background technique [0002] There is a mechanical junction area in the mid-distal junction of the humerus, which becomes a predilection site for indirect violent fractures. Non-surgical treatment with functional bracing has high rates of fracture union and good function. However, disadvantages cannot be avoided, including prolonged immobilization, difficulty in controlling distal bone fragments resulting in malunion, elbow stiffness, and possible radial nerve injury during closed reduction. Anatomical reduction and reliable fixation are beneficial to the recovery of the early range of motion of the elbow joint, and many authors support open reduction and internal fixation with plates. Trad...

AI Technical Summary

Problems solved by technology

The extracutaneous positioning plate and the subcutaneous bone plate are operated together and sent under the skin to be attached to the outside of the bone, which is very time-consuming and labor-intensive

At the same time, in order to position all the screw fixing holes of the bone plate one-to-one with the guide holes of the positioning plate in the existing technology, the bone plate is straight and should not coincide with the mid-distal junction of the humerus. It is also inconvenient to operate and send into the skin and attach it to the outside of the bone. On the contrary, the guide hole of the positioning plate cannot be accurately matched with the fixing hole of the bone plate.

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