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Modelling the arterial wall by finite elements

F Mosora1, A Harmant, C Bernard

  • 1Institute of Physics, University of Liège, Belgium.

Archives Internationales De Physiologie, De Biochimie Et De Biophysique
|May 1, 1993
PubMed
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This study models arterial wall mechanics using in vivo blood flow data. The finite element model accurately predicts vessel radius, aiding in understanding arterial properties in various conditions.

Area of Science:

  • Biomechanics
  • Cardiovascular Physiology
  • Biomedical Engineering

Background:

  • The mechanical properties of arterial walls are crucial for understanding blood flow dynamics and cardiovascular health.
  • Previous models often simplified the complex, non-linear elastic behavior of the aorta.

Purpose of the Study:

  • To theoretically determine the mechanical behavior of the arterial wall using in vivo blood flow parameters.
  • To develop and validate a finite element model for analyzing arterial wall properties.

Main Methods:

  • In vivo measurements of pressure and diameter in canine thoracic and abdominal aortas.
  • Calculation of Young's modulus using established formulas (e.g., Bergel's equation).
  • Finite element analysis using the "Lagamine" program for large deformations.

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Main Results:

  • Young's modulus values ranged from 0.6-2 MPa in the abdominal aorta and 2-6.5 MPa in the thoracic aorta.
  • Theoretical radius estimations closely matched experimental results.
  • The finite element model demonstrated good agreement with in vivo data.

Conclusions:

  • The developed finite element model effectively simulates arterial wall mechanics.
  • This model can be applied to study mechanical properties of arteries in both physiological and pathological states.
  • Accurate modeling of arterial elasticity is key for understanding cardiovascular function.