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Reference resistance indices of the umbilical, fetal middle cerebral and uterine arteries at 24–42 weeks of gestation
Author(s) -
Kurmanavicius J.,
Florio I.,
Wisser J.,
Hebisch G.,
Zimmermann R.,
Müller R.,
Huch R.,
Huch A.
Publication year - 1997
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1046/j.1469-0705.1997.10020112.x
Subject(s) - medicine , umbilical artery , middle cerebral artery , gestation , gestational age , uterine artery , obstetrics , fetus , cerebral arteries , obstetrics and gynaecology , population , pregnancy , ultrasound , cardiology , radiology , genetics , environmental health , ischemia , biology
Abstract The objective of this cross‐sectional study was to construct new reference ranges for Doppler flow velocity waveform resistance indices for the fetal umbilical artery, middle cerebral artery, placental and non‐placental uterine arteries and the placentocerebral ratio in a large and minimally selected population attending a single clinic. Study design and data analysis adhered to a number of stringent and validated methodological recommendations derived both from the recent literature and from a review of earlier publications in this field. The final database comprised initial routine Doppler velocimetry at 24–42 weeks' gestation in 1675 pregnancies. Separate regression models were fitted to estimate the mean and standard deviation at each gestational age for each vessel. New charts, centile tables and regression equations are presented for the resistance indices of the fetal umbilical artery, middle cerebral artery, placental and non‐placental uterine arteries and the mean of both uterine arteries and for the placentocerebral ratio. Copyright © 1997 International Society of Ultrasound in Obstetrics and Gynecology