Use of Doppler ultrasound in the management of uteroplacental perfusion during cardiopulmonary bypass in pregnancy

Fetal heart rate monitoring in nonobstetric surgery: a systematic review of the evidence

“…Monitoring using Doppler ultrasound of fetal and maternal vessels (uterine, umbilical, and middle cerebral arteries among others) was reported in 1 case of maternal cardiovascular surgery. 21, Here fetal and maternal vessel pulsatility index was measured by transabdominal ultrasound performed at key points (eg, baseline, aortic clamp on/off, start and stop of bypass, completion of surgery, postoperative review). CBP was associated with an increase in maternal uterine and fetal umbilical artery resistance index values, accompanied by a fall in fetal middle cerebral artery resistance, suggestive of fetal hypoxia.…”