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Reverse flow in the major infrarenal vessels--a capacitive phenomenon
1George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332-0405.
Biorheology
|January 1, 1988
Summary
A simple model explains abrupt changes in human arterial blood flow waveforms between the thoracic and abdominal aorta. This analysis aids understanding of abdominal artery physiology and leg ultrasound diagnostics.
Area of Science:
- Cardiovascular Physiology
- Biomedical Engineering
- Fluid Dynamics
Background:
- Arterial blood flow waveforms undergo abrupt changes from the thoracic to the abdominal aorta in humans.
- Previous explanations relied on complex numerical solutions of pulse propagation equations.
Purpose of the Study:
- To demonstrate a simple lumped parameter model for explaining arterial waveform changes.
- To provide an easily understood physical basis for observed hemodynamic phenomena.
Main Methods:
- Development and application of a simple lumped parameter model.
- Validation of the model's predictive capabilities under physiological and pathological conditions.
Main Results:
- The lumped parameter model successfully explains the abrupt change in arterial blood flow waveforms.
- The model accurately predicts waveform alterations during exercise and in peripheral vascular disease.
Conclusions:
- A simplified model provides significant insight into abdominal artery physiology.
- This analysis supports the understanding of clinical ultrasound Doppler examinations of the legs.