新的置钉方法在DHS治疗股骨转子间骨折中的应用

目的设计一种动力髋螺钉放置方法 ,对其降低放射线接触时间进行验证。方法 76名转子间骨折患者随机分为实验组和对照组,实验组在骨盆正位片健侧测量小转子基底处股骨宽度、沿股骨颈轴线所放置螺钉长度和大转子顶端到进钉点距离,通过手术中测量小转子基底处股骨宽度计算得出术中进钉点和螺钉长度,对照组利用传统方法进行手术。结果实验组放射线接触时间（24.57±7.80）s明显低于对照组（54.2±18.26）s（P〈0.001）。结论新的置钉方法能显著降低转子间骨折术中放射线接触时间。

A New Technique for Lag Screw Placement in Dynamic Hip Screw Fixation of Intertrochanteric Fractures Decreasing Radiation Time Dramatically

Objective To testify the decrease in radiation time of a new technique to place dynamic hip screw （DHS） in the intertrochanteric fractures.Methods Seventy-six patients were treated with DHS by either the new technique （NT） or the conventional technique （CT）.The width of femoral shaft,the length of the hip screw to be implanted into the injured side,and the distance between the tip of the greater trochanter and the entry point of the guide wire were measured at the uninjured side on the anteroposterior pelvic radiograph preoperatively,and the actual width of the injured femoral shaft was measured intra-operatively.Finally,the entry point and the length of hip screw were obtained through an equation.Results Mean radiation time of the NT patients （24.57±7.80）s was significantly shorter than the CT patients （54.2±18.26）s （P0.001）.Conclusion The new technique decrease radiation time dramatically in DHS fixation.