论文部分内容阅读
应用超声多普勒测定胎儿的血流速度、血流量及血流速度波形,对于监测高危妊娠有重要意义,如能与胎心监护、B 超及必要时配合胎儿血液分析等结合应用,对高危妊娠的筛选及管理则有更大的价值。其中血流速度波形尤为重要。决定血流速度波形的因素很多,其中主要应用以收缩期流速及舒张期流速为基础的三个指数,即收缩期最大流速/舒张期最低流速(S/D 或 A/B)的比值;阻力指数RI(A-B/A);搏动指数 PI(A-B/平均值)来表示。目前应用最多的是测定脐动脉的血流波形。
Application of ultrasound Doppler fetal flow velocity, blood flow and blood flow velocity waveform for the monitoring of high-risk pregnancy is of great significance, such as fetal heart rate monitoring, B ultrasound and if necessary, combined with fetal blood analysis and other applications, high-risk Pregnancy screening and management have greater value. The blood flow velocity waveform is particularly important. There are many factors that determine the waveform of blood flow velocity. The three indices based on systolic and diastolic velocities are used as the ratio of maximum systolic / minimum diastolic velocity (S / D or A / B); resistance Index RI (AB / A); Beat index PI (AB / average) to represent. Currently used to measure the umbilical artery blood flow waveform.