Ductus venosus blood flow velocity waveforms in the human fetus--a Doppler study.
Successful human fetal ductus venosus flow velocity waveform recording was achieved cross sectionally in 48 out of 60 women at 19-22, 27-30 and 36-39 weeks of gestation. The ductus venosus shows a pulsatile flow pattern consisting of a systolic and diastolic forward component without a late diastolic reverse component as demonstrated in the inferior vena cava. Peak systolic velocities as high as 40-80 cm/s were observed. A statistically significant increase in time-averaged velocity, peak systolic and peak diastolic velocity with advancing gestational age was established.
Huisman
T W
TW
Department of Obstetrics and Gynecology, Academic Hospital Rotterdam-Dijkzigt, The Netherlands.
Stewart
P A
PA
Wladimiroff
J W
JW
D001783:Blood Flow Velocity; D005260:Female; D005333:Fetus / Q000098:blood supply; D006801:Humans; D008099:Liver / Q000098:blood supply / Q000196:embryology; D011247:Pregnancy; D011673:Pulsatile Flow; D016216:Ultrasonography, Prenatal; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging / Q000196:embryology