Ultrasound examination of blood flow. I. Flow in the fetal aorta.

A. Pál, A. Kurjak

Research output: Contribution to journalArticle


The descending part of the fetal aorta was examined in a total of 101 healthy pregnant women on 146 occasions between the 28th and 41st weeks of pregnancy. A Kranzbühler 8130 Duplex Doppler apparatus was used throughout. It was found that the blood flow compared to the estimated fetal weight was near to the same value (180-200 ml/min/kg) during the third trimester. The absolute volume of blood flow--not related to fetal body weight--increased about three times from the 28th week to term (200-600 ml/min). The diameter of the fetal aorta increased from 3-4 mm to 7-8 mm during the 3rd trimester. The velocity of blood flow fluctuated between wide limits (20-40 cm/sec), but the average was 28-32 cm/sec. The A/B ratios (A = systolic peak, B = end diastole), the Resistance Indexes (A-B/A), the Pulsatility Indexes (A-B/mean frequency) were nearly the same during the third trimester.

Original languageEnglish
Pages (from-to)93-99
Number of pages7
JournalActa paediatrica Hungarica
Issue number2
Publication statusPublished - 1987


ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

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