Acetabulum posterior column screw guider

Abstract

The invention discloses an acetabulum posterior column screw guider, which comprises a support; a front supporting arm and a rear supporting arm are arranged on the support; a front guiding sleeve and a rear guiding sleeve are arranged on the front supporting arm and the rear supporting arm respectively; the front guiding sleeve and the rear guiding sleeve are coaxial; the front guiding sleeve and / or the rear guiding sleeve can move to adjust the distance between the front guiding sleeve and the rear guiding sleeve; the support and / or the supporting arm and / or the front guiding sleeve and / or the rear guiding sleeve are / is provided with a plurality of positioning holes used for containing kirschner wires; and the kirschner wires are used for fixing the support and / or the supporting arm and / or the front guiding sleeve and / or the rear guiding sleeve. The acetabulum posterior column screw guider disclosed by the invention has the beneficial effects that: the acetabulum posterior column screw guider is easy to operate in an operation and accurate in positioning; fluoroscopy can be performed before a guide needle is placed; effective adjustment is performed according to a fluoroscopy result; the accuracy of the placed guide needle is ensured; a screw enters from the ilium along the guide needle; and the tail part of the screw is not exposed at the ischium, so that the discomfort at the ischium tuberosity and the ischium tuberosity bursitis are not easily caused.

Description

technical field [0001] The invention belongs to the field of medical instruments, and in particular relates to a screw guide for the posterior column of the acetabulum. Background technique [0002] With the development of the transportation industry and construction industry, more and more high-energy injuries are caused, and the incidence of pelvic and acetabular fractures is increasing. Due to its extremely irregular anatomical shape, deep position, and complex anatomy of surrounding tissues, the surgical treatment of acetabular fractures is extremely challenging. The operation of acetabular fracture has always been known as the crown operation in orthopedic trauma surgery. About 50% of acetabular fractures involve posterior column fractures. At present, in complex acetabular fractures with posterior column, the treatment methods for posterior column fracture mainly include posterior K-L approach with plate internal fixation and posterior column screw fixation. The K-L...

AI Technical Summary

Problems solved by technology

However, it has the disadvantages of difficult operation and high technical requirements, and it is difficult to place nails quickly and accurately. These defects limit its application.

In the past, there was a design of a posterior column screw-guided template for rapid screw placement during surgery, but its accuracy is still difficult to control, with an accuracy rate of about 70-80%, and the accuracy of the guide pin cannot be ensured before placement , the fluoroscopy evaluation needs to be done after the guide needle is placed. In case of adjustment, the guide template is difficult to continue to be used for effective adjustment, and multiple needle insertions will cause bone loss in the needle passage.

Images