Acetabulum posterior column reverse motion percutaneous lag screw guiding device

Abstract

The invention relates to an acetabulum posterior column reverse motion percutaneous lag screw guiding device. The guiding device comprises a cross bar, cross bar legs, fixing loop bars and a longitudinal rod. The cross bar strides above the anterior superior spine and the posterior superior iliac spine. The two ends of the cross bar are connected with the cross bar legs respectively through a cross bar sliding device, wherein the cross bar leg at one end can slide on the cross bar along the cross bar sliding device, and the cross bar leg at the opposite end is locked on the cross bar. The fixing loop bars are arranged on the cross bar legs and are used for fixing the anterior superior spine osseous protruding point and the posterior superior iliac spine osseous protruding point respectively. A longitudinal rod leg is arranged at one end of the longitudinal rod, an ischium node loop bar is installed on the longitudinal rod leg, and the other end of the longitudinal rod is connected with the cross bar through a longitudinal rod sliding rotating device. The characteristic that a lag screw can be placed into a connected channel between the midpoint of the connecting line between the anterior superior spine osseous protruding point and the posterior superior iliac spine osseous protruding point and the center of the ischium node is utilized, one-time successful screw placing rate is high, a long enough posterior column screw can be struck into the connected channel, the operation is easy, the structure is simple, and the acetabulum posterior column reverse motion percutaneous lag screw guiding device is easy to sterilize, can be used repeatedly and is suitable for different pelvises.

Description

technical field [0001] The invention belongs to the field of minimally invasive treatment, and relates to a retrograde percutaneous lag screw guide device for the posterior acetabular column, which is applied to the posterior acetabular column retrograde lag screw to fix fractures with no displacement or small displacement of the posterior column. Background technique [0002] For fractures of the posterior column of the acetabulum, open reduction and plate internal fixation are traditionally used for treatment. Although good results have been achieved, due to the deep anatomical position of the acetabulum and the complex adjacent anatomical relationship, the traditional surgical incision is long and exposed. There are many complications such as excessive bleeding, postoperative heterotopic ossification, iatrogenic sciatic nerve injury, and femoral head necrosis, which seriously affect joint function. In the past ten years, the minimally invasive treatment of percutaneous l...

AI Technical Summary

Problems solved by technology

However, navigation equipment is relatively expensive, and its high equipment cost is an important factor affecting its inability to be popularized in most hospitals in China.

[0004] So far, apart from navigation devices, there is no surgical aid that can assist posterior column retrograde lag screw fixation of posterior column fractures

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