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应用脉冲式多普勒超声技术测量了33例正常胎儿的脐动脉血流,测量指标是最大速度(Vp)、下降肢拐点速度(Vi)、舒张末期速度(Vd)、Vp/Vd比值、上升时间(Ta)和初始下降时间(Td)。结果:在33例胎儿中均记录到满意的脐动脉血流频谱,成功率100%,脐动脉血流呈明显的脉动特征,舒张末期流速高于零位线。
Umbilical artery blood flow was measured by pulsed Doppler ultrasound in 33 normal fetuses. The measured parameters were Vp, Vi, Vd, Vp / Vd, Time (Ta) and initial fall time (Td). Results: The satisfactory umbilical artery blood flow spectrum was recorded in all 33 fetuses with a success rate of 100%. The umbilical artery blood flow showed obvious pulsatile characteristics and the end-diastolic velocity was higher than that of the zero line.