PMID: 23338551Jan 23, 2013

Longitudinal reference intervals of maternal-fetal Doppler parameters

Revista brasileira de ginecologia e obstetrícia : revista da Federação Brasileira das Sociedades de Ginecologia e Obstetrícia
Nelsilene Mota Carvalho TavaresCleisson Fábio Andrioli Peralta


To create longitudinal reference intervals for pulsatility index (PI) of the umbilical (UA), middle cerebral (MCA), uterine (UtA) arteries and ductus venosus (DV) in a Brazilian cohort. A longitudinal observational study performed from February 2010 to May 2012. Low risk pregnancies were scanned fortnightly from 18 to 40 weeks for the measurements of PI of the UA, MCA, DV and UtA. Linear mixed models were used for the elaboration of longitudinal reference intervals (5th, 50th and 95th percentiles) of these measurements. PI obtained for the placental and abdominal portions of the umbilical artery were compared by the t-test for independent samples. Two-sided p values of less than 0.05 were considered statistically significant. A total of 164 patients underwent 1,242 scans. There was significant decrease in PI values of all vessels studied with gestational age (GA). From the 18(th) to the 40(th) week of pregnancy, the median PI values of UA (abdominal and placental ends of the cord), MCA, DV and the mean PI of the UtA ranged from 1.19 to 0.74, 1.33 to 0.78, 1.56 to 1.39, 0.58 to 0.41, and 0.98 to 0.66, respectively. The following equations were obtained for the prediction of the medians: PI-UA=1.5602786 - (0.020623 x GA); Logarit...Continue Reading


Jul 19, 2015·International Journal of Gynaecology and Obstetrics : the Official Organ of the International Federation of Gynaecology and Obstetrics·Camilla O FigueiraJosé G Cecatti
Dec 8, 2016·Acta Obstetricia Et Gynecologica Scandinavica·Solhild StridsklevEszter Vanky

Related Concepts

Fetal Structures
Longitudinal Survey
Pulsatile Flow
Structure of Umbilical Artery
Fetal Ultrasonography
Doppler Ultrasound Imaging
Structure of Middle Cerebral Artery
Structure of Uterine Artery
Blood Vessel

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