彩色多普勒超声评价下肢静脉倒流时间阈值的研究

Study of time threshold value of venous reflux in lower extremity veins with color Doppler ultrasonography

目的 确定彩色多普勒超声评判下肢静脉倒流的时间阈值。方法 对 40例准备行股浅静脉第一对瓣膜重建患者的肢体和 15例自愿受检者 2 0条正常肢体 ,应用彩色多普勒超声检测股浅静脉第一对瓣膜的倒流时间 ,检测的结果与手术中探查的结果相比较。结果 彩色多普勒超声以静脉倒流时间0 .5s作为判断静脉倒流的时间阈值具有较高的精确度 ( 95 % )。结论 彩色多普勒超声探测静脉倒流的时间阈值定为 0 .5s较为客观。

Objective To determine time threshold value of venous reflux in lower extremity veins with color Doppler ultrasonography.Methods Forty patients who would perform venous valve reconstruction in the first valve of superficial femoral vein and 20 normal lower extremities were detected with color Doppler ultrasonography, their venous reverse time was measured in the first valve of superficial femoral vein, results of measuring and surgical detection were compared. Results Color Doppler ultrasonography had high accuracy (95%) for the evaluation of venous reflux when time threshold value of venous reflux was defined as reverse flow for greater than 0.5 second. Conclusions Color Doppler ultrasonography can accurately identify limbs with and without venous reflux when venous reflux is defined as reverse flow greater than 0.5 second.