Fixing device for femoral neck fracture

Abstract

The invention relates to a fixing device for femoral neck fracture. The device includes a lateral locking plate and a plurality of femoral neck main nails; the main body shape of the lateral locking plate has an anatomical radian conforming to the outer side of the proximal end of a femur, the femoral neck main nails include first, second, third and fourth femoral neck main nails, and the laterallocking plate is provided with a plurality of main nail holes matched with the femoral neck main nails; and the first femoral neck main nail is locked in the central part of a femur neck, the second femoral neck main nail is vertically locked and fixed to the fracture end of the femoral neck, the third femoral neck main nail and the fourth femoral neck main nail are locked tightly to the bone cortices of the left and right femoral necks respectively, and the third and fourth femoral neck main nails spread towards the respective lateral directions. The fixing device taking into account clinicalefficacy and minimally invasive for the femoral neck fracture is provided.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a femoral neck fracture fixation device. Background technique [0002] Femoral neck fracture is one of the common hip fractures in clinical practice. Elderly patients often suffer from osteoporosis after minor external forces such as falls, while young and middle-aged patients often occur secondary to relatively large violence such as car accidents and falls from heights. . According to the anatomical location, femoral neck fractures can be divided into subcapital, mid-neck, and basal types; according to the Pauwell's angle, they can be divided into type I (<30°), type II (30-50°), type III (>50° °), as the angle increases, the shear force of the fracture end will increase, which will also increase the difficulty of treatment. [0003] At present, the common clinical treatment strategy is to adopt total hip or hemihip replacement for elderly patients. However, joint re...

AI Technical Summary

Problems solved by technology

However, it has high requirements for technical operation, and repeated screw insertion will lead to iatrogenic fractures around the femoral tuberosity; and its own weak holding force on the proximal femoral lateral wall is prone to screw withdrawal, resulting in shortening of the femoral neck and Adverse complications such as hip varus

DHS is a fixed-angle plate device with good shear force resistance, but its proximal end is a single main nail with weak anti-rotation ability, and the rotation of the proximal end of the fracture is prone to occur during insertion, and the outer plate is relatively large It is easy to irritate the soft tissue on the outside of the femur and cause discomfort on the outside of the patient's hip

Theoretically, the lateral locking plate can prevent the screw from withdrawing and avoid shortening of the femoral neck, but it also has the disadvantage of being irritated by the lateral plate, and more importantly, it is prone to the risk of screw passing through the femoral head or screw fracture, fracture nonunion, etc.

Although there are many treatment methods, the incidence of femoral head necrosis, fracture nonunion, excessive shortening of the femoral neck, and hip dysfunction after internal fixation of femoral neck fractures is still high.

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