In vitro aiming device for minimally invasive screw internal fixation of femoral neck fracture

Abstract

The invention discloses an in vitro aiming device suitable for minimally invasive screw internal fixation of femoral neck fracture. The aiming device comprises a bone traction frame central column, a locating plate and a spatial location and angle adjustment mechanism connected between the locating plate and the bone traction frame central column, wherein the locating plate is provided with a first locating needle and a second locating needle; the first and second locating needles share the plane; a third locating needle sharing the plane with the second locating needle is arranged at the tail end of the second locating needle on a rotating disk; scribed lines and characters corresponding to the rotating angle of the rotating disk are marked on the ring-shaped side wall of an upper rotating disk; and an internal fixation nail passing opening communicated with front and rear orifices of a cannula is arranged on one side wall of the cannula. The aiming device overcomes the technical defect of the existing aiming devices that plenty of radiation is caused to the medical staff and can rapidly and accurately determine the body surface implanting position of the hollow guide needle.

Description

technical field [0001] The invention relates to a medical device, in particular to an external collimator for femoral neck fracture screw minimally invasive internal fixation operation. Background technique [0002] Proximal femoral fractures (including femoral neck fractures and intertrochanteric fractures) are common in adults. Epidemiological surveys have found that in recent decades, with the increase in the average life expectancy of human beings, the incidence of proximal femur fractures has shown an obvious upward trend. Fractures have high morbidity and mortality rates. About 15% to 20% of patients die within two years after fractures. One year later, the mortality rate of patients returns to the same level as that of the same age group. [0003] The purpose of internal fixation surgery for proximal femoral fractures is to obtain a firm and stable internal fixation so that the patient can get up and move around in a short time. Early mobilization is beneficial for ...

AI Technical Summary

Problems solved by technology

At present, the surgeon generally raises the buttocks of the affected side slightly during the operation, and uses the aimer to insert the guide needle based on experience. Often, the guide needle cannot be placed in the predetermined position quickly and accurately, and repeated operations are required, which prolongs the operation time. Increased surgical blood loss and increased surgical trauma, but also caused patients and medical workers to absorb too much unnecessary radiation dose

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