...像研究 流程度及血流动力学定量指标：收缩期峰值速度（peak systolic velocity，PSV），舒张末期速度（end diastolic velocity，EDV），阻力指数（resistive index，RI），搏动指数（pulsatility index，P...
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...究 流程度及血流动力学定量指标：收缩期峰值速度（peak systolic velocity，PSV），舒张末期速度（end diastolic velocity，EDV），阻力指数（resistive index，RI），搏动指数（pulsatility index，P...
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目的探讨脐动脉收缩期血流峰值（S）与舒张末期血流速度（D）的比值（S/D）对预测胎儿宫内缺氧的临床价值。
Objective This paper is to investigate the ratio of the systolic peak value and the end-diastolic velocity of blood flow (S/D value) and its clinical value, which can predict fetal anoxia.
目的评价肝素对改善妊娠中晚期脐动脉收缩期最大血流速度（S）与舒张末期血流速度（D）的比值异常的临床效果。
ObjectiveTo evaluate the efficiency of heparin on the ratio of peak systolic to least diastolic flow velocity (S/D) of umbilical artery flow velocity waveforms at second-trimester pregnancies.
病灶局部所测血流动力学参数为收缩期峰值血流速度PS V，舒张末期血流速度(EDV)及阻力指数ri。
The hemodynamic parameters measured in the lesion locations included peak systolic velocity (PSV), end diastolic velocity (EDV), and resistance index (RI).
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