PMID: 10826584May 29, 2000Paper

Fetal haemodynamic changes in fetuses during fetal development evaluated by arterial pressure pulse and blood flow velocity waveforms

BJOG : an International Journal of Obstetrics and Gynaecology
A MoriT Makino

Abstract

To study the relation between diameter pulse (pressure pulse) and flow velocity waveforms in the fetal descending aorta in fetuses with intrauterine growth retardation and acceleration. Blood flow through a tubular system can be expressed by the ratio of blood pressure to vascular resistance. Doppler ultrasound and a phase locked loop echo tracking system coupled to a B-mode ultrasonic imager (central frequency 3.5 MHz) were used to assess downstream resistance and change in blood pressure, respectively. Tertiary referral unit in a teaching hospital Serial study between 21 and 40 weeks of 22 women with normally grown fetuses at intervals of four weeks; 25 women with small for gestational age fetuses with uteroplacental insufficiency (high umbilical artery pulsatility index); and six women with large for gestational age fetuses. We measured the maximum systolic and minimum diastolic diameter of the fetal descending aorta (the pulse amplitude) and then calculated the pulsatile waveform time integral above the least diastolic diameter (pulsatile area) and total waveform time integral (perfusion area). Normal fetal growth was associated with an increase in systolic and diastolic diameters in the fetal descending aorta with advancin...Continue Reading

References

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Jan 1, 1989·Ultrasound in Medicine & Biology·D GustafssonG Gennser
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Citations

Dec 7, 2002·Ultrasound in Medicine & Biology·Yasuyuki FujitaHitoo Nakano
Aug 31, 2013·Ultrasound in Medicine & Biology·Pieter C StruijkFred K Lotgering
Jul 25, 2013·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·Livia KapustaAvraham Lorber
Sep 26, 2008·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·P C StruijkJ W Wladimiroff
Mar 6, 2002·Seminars in Perinatology·William P Fifer, Michael M Myers
Jan 21, 2006·The Journal of Pediatrics·Mori Akira, Saburi Yoshiyuki

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