Screw placement guider

Abstract

The invention discloses a screw placement guider. The guider comprises a connecting rod, sleeve sliders, a first guide rail and a second guide rail, wherein the first and second guide rails are in the same plane and are connected with each other by the connecting rod; sawteeth are respectively arranged at one sides of the first and second guide rails; the sleeve sliders comprise sliders, cover plates and sleeves; the sliders are provided with grooves; the first or second guide rail passes through the grooves; the cover plates are arranged outside the first or second guide rail and are fixedlyconnected on the sliders; the sliders are provided with adjusting knobs; sawteeth matched with the sawteeth of the first or second guide rail are arranged on the circumferences of the adjusting knobs; the sleeves are provided with at least one hollow cylinder inside and are fixedly connected with the sliders; the first guide rail is provided with at least a sleeve slider; and the second guide rail is provided with at least one sleeve slider. The guider has the following beneficial effect: the positions of the sleeves in the guider can be adjusted, thus improving the probability of one-time accurate screw placement.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to a nail guide, which is suitable for percutaneous femoral neck nail placement. Background technique [0002] For the treatment of femoral neck fractures, reduction and internal fixation are usually required clinically. There are many ways to fix, and the most commonly used is to use a positioning board. A plurality of hollow sleeves are arranged on the positioning plate. When positioning is required, find hollow sleeves with reasonable spacing. Out of the reasonable position of the epidermis, the second hollow sleeve is penetrated into the skin through the hollow sleeve of the positioning plate, and then the fixing parts such as nails are penetrated into the skin through the second hollow sleeve. Although the positioning plate of this structure can achieve the purpose of positioning, because the position of the hollow sleeve on the positioning plate is fixed and cannot be changed at wil...

AI Technical Summary

Problems solved by technology

Although the positioning plate of this structure can achieve the purpose of positioning, because the position of the hollow sleeve on the positioning plate is fixed and cannot be changed at will, the distance between the hollow sleeves on the positioning plate often does not meet the requirements of the operation. Drive the screw at the appropriate distance into the femoral neck bone

If the positioning plate is not used, when the femoral neck is placed on the basis of the doctor's experience, repeated drilling and fluoroscopy are often required to achieve the proper position. Excessive drilling destroys the blood supply in the femoral neck and causes bone loss , reduces the firmness of fracture fixation, and is also one of the iatrogenic factors that cause fracture nonunion and femoral head necrosis

To achieve one-time accurate nail placement, it can only be achieved with computer navigation aids, but computer navigation aids are expensive, and the complete set of auxiliary equipment needs nearly 4 million yuan, which is only equipped by a very small number of hospitals and cannot be popularized.

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