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应用多普勒检测脐动脉血流速率波形有助于小于胎龄儿和胎儿潜在损害的产前筛选检查,并可改善对妊娠的处理。但有关操作者变异性的报道很少,结果亦不一致。本文的目的是通过两名有经验的产科医生操作连续波型多普勒所获得的脐动脉血流速率波形的标准指标,检查操作者自身的和操作者之间的变异性。作者收集了20例孕20～42周的高危产前患者,取半卧位进行检查。由两名具有多普勒检查经验的产科医生操作,分别记录每位患者的三种波形。采用4-MHz连续波型多普勒超声仪,获得脐动脉血流速率波形,并计算出阻力指标、搏动指标和收缩
Doppler detection of umbilical artery blood flow rate waveform contributes to prenatal screening screening for potential lesions less than gestational age and fetus and improves treatment of pregnancy. However, there are few reports on operator variability and the results are not consistent. The purpose of this paper is to examine the variability between the operator and the operator using the standard indicators of the umbilical arterial flow rate waveform obtained by two experienced obstetricians operating continuous wave Doppler. The authors collected 20 high-risk prenatal patients who were pregnant between 20 and 42 weeks and were examined in a semi-recumbent position. Operated by two obstetricians with Doppler examination, each patient’s three waveforms were recorded. Using 4-MHz continuous wave Doppler ultrasound system, umbilical artery blood flow rate waveform was obtained, and calculated the resistance index, pulse index and contraction