Keywords:
Obstetrics (Pregnancy / birth / postnatal period), Arteries / Aorta, Ultrasound-Spectral Doppler, Screening, Obstetrics
Authors:
E. G. Okwudire1, O. M. Atalabi2, O. O. Alasia1; 1Port-Harcourt/NG, 2Ibadan/NG
DOI:
10.26044/ecr2019/C-1793
Aims and objectives
The gravid uterus is supplied by anastomoses between the left and right uterine arteries and the ovarian arteries.[1] The contribution of these vessels to placental blood flow depends on placental location and placental-side indices have been reported to be lower placental vessels in laterally located placentas.[2-4] Non-central placental location has also been reported to be associated with increased adverse peri-natal outcomes,
including pre-eclampsia,
IUGR,
and even post partum heamorrhage.[5,6] Others have found no such association.[7-9] First and second trimester uterine artery Doppler have proven useful in the prediction of PrE and these studies have generally been based on the mean values (left and right) of uterine artery Doppler indices.[10] The effect placental location on predictive value of mean Doppler indices is largely uninvestigated and we therefore aimed to assess the risk of development of PrE based on placental location,
as well as compare the accuracy uterine artery Doppler indices [Pulsatility Index (PI),
Resistivity Index (RI) and Systolic:Diastolic (S/D) ratios] in prediction of adverse pregnancy outcomes in central and laterally located placentas.