Effects of bleeding on uteroplacental, umbilicoplacental and yolk-sac hemodynamics in early pregnancy.

摘要: Objective To determine the influence of vaginal bleeding with or without a persisting subchorionic hematoma on uteroplacental, umbilicoplacental and yolk-sac hemodynamics in early pregnancy. Design Twenty-six consecutive patients entered this longitudinal study 1–3 days after beginning were re-examined every 1–2 weeks. In three cases occurred at 5th completed gestational week, 13 7th nine 8th week one case 10th week. A was identified seven Four pregnancies ended miscarriage. Blood velocity waveforms uterine, arcuate, radial, spiral, umbilical, chorionic arteries obtained by transvaginal pulsed Doppler ultrasound peak systolic velocities, time-averaged maximum velocities pulsatility indices calculated. The results compared our earlier observations normal pregnancy similar protocol. Results At radial artery pulsatility-index values (mean (SD)) higher (1.84 (0.59); P = 0.04) (1.96 (0.63); 0.03) than (1.40 (0.46)). umbilical did not differ between groups. Vaginal affect any measured parameters. Persistence until hemodynamics. Yolk-sac hemodynamic parameters groups. Conclusions Vaginal is associated increased impedance pregnancy. does utero- circulation. Copyright © 2001 International Society Ultrasound Obstetrics Gynecology