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Hepatic venous Doppler waveforms: changes in pregnancy

C A Roobottom1, J D Hunter, M J Weston

  • 1Department of Radiodiagnosis, Derriford Hospital, Plymouth, England, United Kingdom.

Journal of Clinical Ultrasound : JCU
|October 1, 1995
PubMed
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Pregnancy significantly alters hepatic venous pulsatility, transforming normal waveforms into flat patterns as gestation progresses. These changes become more pronounced in later stages of pregnancy.

Area of Science:

  • Obstetrics and Gynecology
  • Vascular Ultrasound
  • Fetal Medicine

Background:

  • Hepatic venous pulsatility is a key indicator of cardiovascular status.
  • Pregnancy induces significant physiological changes affecting maternal circulation.
  • Understanding these changes is crucial for monitoring fetal and maternal well-being.

Purpose of the Study:

  • To investigate the changes in hepatic venous pulsatility during different stages of pregnancy.
  • To correlate alterations in Doppler waveforms with gestational progression.
  • To establish normative data for hepatic venous flow patterns in pregnancy.

Main Methods:

  • Utilized Doppler ultrasound with a 3.5 MHz transducer to examine 75 healthy pregnant volunteers.
  • Assessed middle hepatic vein Doppler waveforms during quiet respiration in a supine position.

Related Experiment Videos

  • Blindly categorized waveforms as normal, damped, or flat based on pulsatility.

    • Main Results:

    • Early pregnancy (12-20 weeks) showed predominantly normal pulsatility (64%).
    • Significant changes occurred between 20-30 weeks, with 68% of waveforms becoming flat (p > 0.001).
    • Late pregnancy (last 10 weeks) demonstrated marked changes, with 80% of waveforms being flat.

    Conclusions:

    • Hepatic venous pulsatility undergoes profound, progressive changes throughout pregnancy.
    • Waveforms shift from pulsatile to flat with increasing gestational age.
    • These findings highlight significant hemodynamic adaptations during pregnancy.