Standards for the quantification of serial changes in Doppler resistance indices from the umbilical arteries

Early Human Development
P Owen, S Ogston

Abstract

Two-hundred- and-seventy-four low-risk pregnancies underwent serial ultrasound examinations in order to determine the mean and standard deviation of the change in umbilical artery resistance indices with advancing gestation. There is an almost constant rate of reduction in the A/B ratio and the Pulsatility index over time from 28 weeks gestation until term. By calculating the standard deviation score of such changes, these reference ranges allow the change in the A/B ratio and Pulsatility index to be quantified. Such appropriately derived standards permits the further investigation of the evolution of abnormalities of feto-placental perfusion with regards to perinatal outcome.

References

Jun 11, 1992·American Journal of Obstetrics and Gynecology·J M Miller, H A Gabert
Feb 1, 1990·International Journal of Gynaecology and Obstetrics : the Official Organ of the International Federation of Gynaecology and Obstetrics·N Dor, M Shtern
Apr 1, 1991·British Journal of Obstetrics and Gynaecology·B J TrudingerW Wilcox
Oct 1, 1989·British Journal of Obstetrics and Gynaecology·D G Altman, F E Hytten
Sep 1, 1989·American Journal of Obstetrics and Gynecology·S K HendricksR W Zingheim
Jun 1, 1989·British Journal of Obstetrics and Gynaecology·J DempsterD J Taylor
Jan 1, 1989·Acta Obstetricia Et Gynecologica Scandinavica·K ArströmK Marsal
Dec 1, 1989·Clinical Obstetrics and Gynecology·A FleischerP Stuhlmuller
May 1, 1987·American Journal of Obstetrics and Gynecology·B L RochelsonB Penny
Mar 1, 1988·British Journal of Obstetrics and Gynaecology
Jun 1, 1988·British Journal of Obstetrics and Gynaecology·R S ThompsonW B Giles
Jul 1, 1987·British Journal of Obstetrics and Gynaecology·G MiresJ W Crawford
Jan 1, 1985·British Journal of Obstetrics and Gynaecology·W B GilesP J Baird
Feb 15, 1985·American Journal of Obstetrics and Gynecology·A FleischerG Randolph
Jun 1, 1985·British Journal of Obstetrics and Gynaecology·R L Erskine, J W Ritchie
Jan 1, 1985·British Journal of Obstetrics and Gynaecology·B J TrudingerL Collins
Nov 1, 1984·European Journal of Obstetrics, Gynecology, and Reproductive Biology·P J ReuwerA A Haspels
Apr 1, 1984·American Journal of Obstetrics and Gynecology·H SchulmanP Blattner
Feb 1, 1980·British Journal of Obstetrics and Gynaecology·D G Altman, E C Coles
Sep 1, 1980·British Journal of Obstetrics and Gynaecology·B StuartN M Duignan
Jan 1, 1994·Gynecologic and Obstetric Investigation·G DilmenE Gökşin
May 1, 1994·British Journal of Obstetrics and Gynaecology·T C ChangS Gallivan
May 1, 1993·The Australian & New Zealand Journal of Obstetrics & Gynaecology·P Duggan, L McCowan
Feb 1, 1994·British Journal of Obstetrics and Gynaecology·R C PattinsonH J Odendaal
Jan 1, 1996·British Journal of Obstetrics and Gynaecology·P OwenN B Patel
May 1, 1996·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·F Baron, D Graham
Jul 1, 1991·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·C M BilardoK H Nicolaides
Nov 1, 1993·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·D G Altman, L S Chitty

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Citations

Aug 9, 2003·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·P OwenT Farrell
Aug 21, 2018·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·D OrosA T Papageorghiou

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