Umbilical artery flow velocity waveforms in high-risk pregnancy. Randomised controlled trial

Area of Science:

• Obstetrics and Gynecology
• Fetal Medicine
• Perinatology

Background:

• High-risk pregnancies require careful monitoring to optimize fetal outcomes.
• Umbilical artery Doppler studies assess fetal well-being by evaluating placental function.

Purpose of the Study:

• To investigate the impact of antenatal Doppler umbilical artery waveform studies on obstetrical decision-making and perinatal outcomes in high-risk pregnancies.

Main Methods:

• A randomized controlled trial involving 300 high-risk pregnancies (mean gestational age 34 weeks).
• Patients were allocated to either antenatal Doppler umbilical artery waveform studies or a control group.
• Outcomes assessed included timing of delivery, rates of elective and emergency cesarean sections, fetal distress, and neonatal intensive care unit (NICU) admission and support.

Main Results:

• No significant difference in overall timing of delivery or elective delivery rates between groups.
• The Doppler-report-available group showed a lower rate of emergency cesarean sections during labor (13% vs. 23% in controls).
• Fetal distress in labor and duration of neonatal intensive care (level 3) with respiratory support were significantly reduced in the Doppler group.

Conclusions:

• Availability of antenatal Doppler umbilical artery waveform studies enhances obstetrical decision-making.
• Doppler studies can lead to improved perinatal outcomes, including reduced emergency interventions and neonatal morbidity.
• Routine use of Doppler assessment in high-risk pregnancies is recommended for better fetal and maternal care.