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Updated: Aug 7, 2026
06:56
Human Fetal Blood Flow Quantification with Magnetic Resonance Imaging and Motion Compensation
Published on: January 7, 2021
Abnormal arterial flows by a distributed model of the fetal circulation
Jeroen P H M van den Wijngaard1, Berend E Westerhof, Dirk J Faber
1Laser Center and Department of Obstetrics and Gynecology, BMEYE Cardiovascular Monitoring Company, University of Amsterdam, The Netherlands.
Summary
This study presents a new mathematical model for fetal circulation, improving the interpretation of abnormal blood flow in fetuses. The model enhances understanding of fetoplacental arterial dynamics and clinical management.
Area of Science:
- Biomedical Engineering
- Fetal Physiology
- Mathematical Modeling
Background:
- Current models of fetoplacental circulation lack comprehensive gestational age ranges and fail to account for anatomical, vascular, and rheological variations.
- Accurate modeling of fetal arterial flow is crucial for interpreting abnormal flow velocity waveforms.
Purpose of the Study:
- To develop a mathematical model of pulsating fetoumbilical arterial circulation.
- To assess the influence of various physiological parameters on pulsatility index (PI) and flow dynamics.
- To improve the interpretation of fetal arterial flow pulsations.
Main Methods:
- Utilized Womersley's oscillatory flow theory and viscoelastic arterial wall properties.
- Calculated arterial flow waves at different locations to determine pulsatility index (PI).
- Systematically varied parameters including blood viscosity, resistances, compliance, heart rate, arterial stiffness, and umbilical artery length.
Main Results:
- Increased placental resistance or decreased brain resistance led to increased umbilical artery PI and decreased cerebral artery PI, reducing placental flow.
- Increased arterial stiffness elevated PIs throughout the fetoplacental circulation.
- Bradycardia and tachycardia modulated PI, while blood viscosity and compliance had limited effects.
Conclusions:
- The developed model offers a more comprehensive approach to understanding fetoplacental arterial circulation.
- It can enhance the interpretation of abnormal flow velocity waveforms, aiding in the diagnosis and management of fetal conditions.
- This model has the potential to advance the understanding of pathophysiological processes and improve clinical management in fetal medicine.
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01:17Autoregulation of Blood Flow
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01:29Blood Flow
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01:07Development of Blood Vessels
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