恶性肿瘤内动脉的最大血流速度（PSV）高于良性肿瘤。
The artery's peak systolic velocity(PSV) of malignant tumors was higher than that of benign tumors.
中型颅脑损伤的对侧半球，伤后脑最大血流速度及流量显著增加。
The maximum velocity and flow quantum of blood of contra hemisphere increased markedly in moderate brain injury.
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.
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.
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