PMID: 16127583Aug 30, 2005

Ductus venosus Doppler velocimetry to predict acidemia at birth in pregnancies with placental insufficiency

Revista da Associação Médica Brasileira
F H C CarvalhoLuiz Kulay Junior


To investigate the possibility of predicting acidemia at birth in pregnancies with placental insufficiency by Doppler velocimetry of the ductus venosus and to establish the best parameter and cut-off points in this prediction. This was a prospective cross-sectional study, involving 47 single pregnancies with placental insufficiency after 26 weeks of gestation, carried out at the "Hospital São Paulo (UNIFESP) and Maternidade-Escola Assis Chateaubriand (UFC)". Placental insufficiency was defined as the umbilical artery pulsatility index above the 95th percentile for gestational age. Fetuses with chromosomal or structural anomalies were excluded. The time interval between the Doppler velocimetry and the birth was of less than 24 hours. The umbilical arterial blood samples were collected immediately after birth. Acidemia was defined as umbilical arterial pH < 7.2 in the absence of uterine contractions and < 7.15 in the presence of contractions. Metabolic or mixed acidemia at birth was considered pathological. Receiver operating characteristics (ROC) curves were calculated for S, D and A-velocities, pulsatility index for veins and the S/A ratio and (S-A)/S ratio of the ductus venosus. Parameters were compared using the MacNemar Test...Continue Reading


Aug 26, 2009·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·M M De S LimaAntônio Fernandes Moron

Related Concepts

Metabolic Acidosis
Blood Flow Velocity
Placental Insufficiency
Structure of Umbilical Artery
Umbilical Vein
Velocimetry, Laser-Doppler

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