A device for inserting a trans-acetabular screw

By designing an adjustable positioning structure and guide for the transverse tension screw placement device of the anterior and posterior columns of the acetabulum, the problem of inaccurate screw placement caused by differences in the anatomical structure of different patients is solved, achieving higher screw placement accuracy and safety, and reducing surgical complications.

CN224540302UActive Publication Date: 2026-07-24175TH HOSPITAL OF PEOPLES LIBERATION ARMY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
175TH HOSPITAL OF PEOPLES LIBERATION ARMY
Filing Date
2025-04-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In surgery for fractures of the anterior and posterior columns of the acetabulum, existing transverse lag screw placement devices for the anterior and posterior columns of the acetabulum are difficult to adapt to the differences in anatomical structures among different patients, resulting in inaccurate screw placement and easy damage to the obturator nerve and hip joint.

Method used

A device for placing transverse tension screws along the anterior and posterior columns of the acetabulum was designed. It includes an adjustable positioning structure and a guide. The distance between the positioning structure and the guide is controlled by the adjustment. Combined with the guide channel and the fixing groove, it ensures that the guide pin enters the bone along a precise trajectory and reduces deviation.

Benefits of technology

It improves the accuracy and safety of screw placement, avoids damage to nerves and joints, reduces operation time and adjustment steps, and enhances the stability and flexibility of the operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an acetabulum front and back column through the acetabulum bottom horizontal line pull screw setting device, including the base plate, the upper surface rotationally connected with the guide piece of base plate, the base plate and guide piece are equipped with the mutual adaptation's guide channel, the guide channel can pass through the guide needle, the outside surface of guide piece is connected with the positioning structure for the close contact of ischial obturator outer edge, and the positioning structure is equipped with the adjusting part that can adjust the distance between positioning structure and guide piece, because the patient's anatomical structure has individual difference, the size, shape, front and back column's spatial position relation etc. of different patient's acetabulum are not exactly the same, the distance between adjustable positioning structure and guide piece, can make the setting device better close patient's specific acetabulum form, improve the accuracy and safety of screw setting, reduce the setting deviation caused by individual difference.
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