[Vaginal sonographic flow measurements in the uterine artery in pregnancy--advantages of the pulsed Doppler method].
Uterine artery velocimetry was performed transvaginally in 42 healthy pregnant women by means of a newly developed "panorama" sector scanner which provides a real time image of the vessel in combination with the recording of a pulsed and gated Doppler signal. Measurements were made on both uterine arteries and averaged. A/B ratios and pulsatility indices declined as pregnancy advanced. A/B ratios I. Trimenon vs. III. Trimenon = 5.44 vs. 2.20, PI = 2.59 vs. 1.32. These changes may be secondary to the conversion of spiral arteries into dilated tortuous vessels by the trophoblast invasion. Flow velocity measurements of the proximal uterine arteries provide a summery of the blood supply to all the arcuate arteries. This method will enhance our understanding of adequate placentation and may provide a new tool in the diagnosis and monitoring of complicated pregnancies.
Rudelstorfer
R
R
II. Universitäts-Frauenklinik Wein.
Deutinger
J
J
Katz
E
E
Bernaschek
G
G
D001158:Arteries / Q000503:physiopathology; D001783:Blood Flow Velocity; D005260:Female; D005317:Fetal Growth Retardation / Q000503:physiopathology*; D005865:Gestational Age; D006801:Humans; D008431:Maternal-Fetal Exchange; D008838:Microcomputers; D011247:Pregnancy; D012815:Signal Processing, Computer-Assisted; D014463:Ultrasonography / Q000295:instrumentation*; D014599:Uterus / Q000098:blood supply; D014621:Vagina
Vaginosonographische Strömungsmessungen in der Arteria uterina während der Schwangerschaft--Vorteile der gepulsten Doppler-Methode.