Martinez J M, Comas C, Ojuel J, Borrell A, Puerto B, Sentis J, Fortuny A
Department of Obstetrics and Gynecology, Hospital Clinic, Barcelona, Spain.
Ultrasound Obstet Gynecol. 1995 May;5(5):325-7. doi: 10.1046/j.1469-0705.1995.05050325.x.
The aim of our study was to determine the pulsatility index (PI) of the umbilical artery velocity waveform obtained from the fetal insertion, the placental insertion and a free floating loop of the umbilical cord. This was a prospective study involving 60 consecutive singleton pregnancies undergoing ultrasound examination between 10 and 13 weeks' gestation. Doppler measurements were obtained transvaginally from the placental and the fetal abdominal insertion, and from a free floating loop of umbilical cord. Chromosomal abnormalities and structural malformations detected by ultrasound were excluded. A multi-way analysis of variance did not show significant differences between the measurements of umbilical PI at the different sites of the umbilical cord and Pearson's coefficient showed an excellent correlation between them. No significant intra- and interobserver differences were found. In conclusion, measurements of Doppler velocimetric indices of the umbilical artery during the first trimester are not influenced by the recording site and these recordings are reproducible at this stage of gestation.
我们研究的目的是确定从胎儿端、胎盘端以及脐带游离段获取的脐动脉血流速度波形的搏动指数（PI）。这是一项前瞻性研究，纳入了60例孕10至13周期间连续接受超声检查的单胎妊娠。经阴道从胎盘端、胎儿腹部端以及脐带游离段获取多普勒测量值。排除超声检测出的染色体异常和结构畸形。多因素方差分析显示，脐带不同部位的脐动脉PI测量值之间无显著差异，Pearson系数显示它们之间具有良好的相关性。未发现观察者内和观察者间的显著差异。总之，孕早期脐动脉多普勒血流速度指标的测量不受记录部位的影响，且在该孕周阶段这些记录具有可重复性。
