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A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
09:39

A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways

Published on: May 9, 2016

A microstructurally driven model for pulmonary artery tissue.

Philip H Kao1, Steven R Lammers, Lian Tian

  • 1Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309, USA.

Journal of Biomechanical Engineering
|May 24, 2011
PubMed
Summary
This summary is machine-generated.

A new total crimped fiber model accurately simulates pulmonary artery tissue mechanics. This model integrates elastin and collagen properties for better understanding of arterial tissue deformation in disease states.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Cardiovascular Research

Background:

  • Pulmonary artery tissue mechanics are crucial for understanding cardiovascular health and disease.
  • Existing models may not fully capture the complex interplay of passive load-bearing components like elastin and collagen.
  • Accurate constitutive models are needed to represent arterial tissue deformation, especially in disease states.

Purpose of the Study:

  • To introduce a novel constitutive model, the total crimped fiber model, for elastic, proximal pulmonary artery tissue.
  • To base the model on the material and microstructural properties of elastin and collagen.
  • To enhance the representation of arterial tissue mechanics, particularly during high stretch and in disease.

Main Methods:

  • Modeling elastin matrix proteins using an orthotropic neo-Hookean material.
  • Representing high stretch behavior with an orthotropic crimped fiber material (planar sinusoidal linear elastic beam) for collagen deformation.
  • Defining collagen-dependent artery orthotropy via a structure tensor for collagen fiber orientation.

Main Results:

  • Developed a microstructural model where all parameters correlate with physiologic structure, geometry, or measured material properties.
  • Incorporated elastin orthotropy to improve the representation of arterial tissue deformation mechanics.
  • Demonstrated the model's good quality of fit and flexibility for varied mechanical behaviors.

Conclusions:

  • The total crimped fiber model provides a robust framework for simulating pulmonary artery tissue mechanics.
  • The model's foundation in microstructural and material properties allows for accurate representation of tissue behavior.
  • This model offers flexibility for studying mechanical changes in pulmonary arteries associated with various disease states.