Open AccessDoppler Velocimetry Measured in Retrochorionic Space and Uterine Arteries During Early Human Pregnancy
Author(s) -
Mercé L.T.,
Barco M. J.,
Fuente F.
Publication year - 1989
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016348909013278
Subject(s) - medicine , laser doppler velocimetry , pregnancy , velocimetry , uterine artery , vascular resistance , gestational age , pulsatility index , doppler effect , blood flow , flow resistance , gestation , nuclear medicine , obstetrics , anatomy , gynecology , radiology , hemodynamics , fetus , flow (mathematics) , optics , biology , genetics , physics , astronomy , geometry , mathematics
The natural course of uterochorionic vascular resistance during the first trimester of pregnancy is described. We performed a weekly study using a pulsed Doppler in 25 normal pregnancies, with a total of 191 examinations made. The flow velocity waveform was studied simultaneously in the retrochorionic area as well as in the uterine arteries. Different velocimetry indices were analysed, which demonstrated the feasibility of the (D/S) × 100 index for study of the retrochorionic vessels and of the Pourcelot index (S‐D/S) for the uterine arteries. A gradual weekly decrease in flow resistance was found, with significant differences before [D/S]× 100 = 52,01±8,33; S‐D/S=0,83±0.09] vs after the 9th week [(D/S) × 100=58,9±8,78; S‐D/S=0,72±0,10]. Further evaluation of its predictive and diagnostic value in gestational pathology is necessary.