Doppler velocimetry of umbilical artery in growth retarded pregnancy.

      Аннотация: Intrauterine growth retardation (IUGR) is defined as a birth weight below 10th percentile for a given gestational age. IUGR occurs in 5-10% of all pregnancies. Doppler velocimetry of umbilical artery (UA) is a rapid non-invasive test that provides valuable information about the hemodynamic situation of the fetus. Various indices of UA velocimetry are PI( Pulsatility index), RI (Resistance index), S/D (Systolic/Diastolic) ratio which are gradually decreasing as pregnancy advances during normal pregnancy. In IUGR pregnancies these indices increase and at the end there appears absent and reversed end-diastolic flow. Applicability of Doppler indices in the diagnosis of abnormalities is possible only when there are reference normal values for each index. This book provides reference ranges of Doppler indices in tabulated form both for IUGR and normal pregnancy at 3rd trimester. This would be helpful for obstetrician for obstetric decision making as well as for management of IUGR. In IUGR fetuses there exists strict correlation between the abnormal umbilical artery Doppler wave form and increased incidence of perinatal complications.

Ключевые слова: Doppler, pregnancy, Doppler velocimetry, retarded pregnancy