Doppler waveform patterns of the umbilical artery--screening test for high risk pregnancies.
Doppler assessment of umbilical artery waveforms using the peak systolic to end diastolic (S/D) ratio was used to determine if complications associated with impaired trophoblastic invasion of placental bed (i.e. pregnancy induced hypertension and intrauterine growth retardation) could be predicted. Values for S/D ratio of at least 4, 3.5 and 3 at 22-26, 30-32 and > or = 37 weeks gestation, respectively, were found to be better predictors of such complications. Pregnancy-induced hypertension could be predicted in 63% and growth retardation in 60% cases at 22-26 weeks of gestation.
Mullick
S
S
Department of Obstetrics, Kasturba Medical College and Hospital, Manipal, India.
Kushtagi
P
P
Swain
U K
UK
Rao
K
K
Muralidhar
B G
BG
D001783:Blood Flow Velocity / Q000502:physiology; D005260:Female; D005317:Fetal Growth Retardation / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D006973:Hypertension / Q000453:epidemiology / Q000517:prevention & control*; D008403:Mass Screening / Q000379:methods; D011237:Predictive Value of Tests; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000453:epidemiology / Q000517:prevention & control*; D012307:Risk Factors; D012680:Sensitivity and Specificity; D014465:Ultrasonics; D016216:Ultrasonography, Prenatal; D014469:Umbilical Arteries / Q000000981:diagnostic imaging*