Umbilical venous flow assessment

Umbilical venous flow in the physiological situation comprises of a monophasic non-pulsatile flow pattern with a mean velocity of 10-15 cm/s. The presence of pulsatility implies a pathological state unless in the following situations:

  • early in pregnancy: up to ~13 weeks gestation 
    • the presence of pulsatility may be higher in chromosomally abnormal fetuses even in early pregnancy 5
  • when confounded by other movement variables such as 
    • fetal breathing movement
    • fetal hiccups 1

Pulsations of the umbilical venous system, especially double pulsations have been associated with increase in the perinatal mortality when associated with the absent and reversed end-diastolic flow velocity in the umbilical artery.

Ultrasound - obstetric
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Article information

rID: 13832
System: Obstetrics
Section: Approach
Tags: stub, cases
Synonyms or Alternate Spellings:
  • Umbilical vein flow assessment
  • Umbilical vein Doppler assessment

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