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Platelet Adhesion and Aggregation Under Flow using Microfluidic Flow Cells
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A Two-phase mixture model of platelet aggregation.

Jian Du1, Aaron L Fogelson2

  • 1Department of Mathematical Sciences, Florida Institute of Technology, Melbourne, Florida, USA.

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|March 25, 2017
PubMed
Summary
This summary is machine-generated.

A new two-phase model simulates platelet aggregation in blood vessels, improving thrombus formation speed and density. This model captures complex fluid-structure interactions, crucial for understanding blood clot development.

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Area of Science:

  • Biomedical Engineering
  • Computational Fluid Dynamics
  • Hematology

Background:

  • Platelet aggregation is critical in thrombosis, but previous models struggled to capture physiological timescales.
  • Understanding the fluid dynamics of platelet thrombus formation is essential for cardiovascular disease research.

Purpose of the Study:

  • To develop and present a novel two-phase model for simulating platelet aggregation in coronary-artery-sized vessels.
  • To investigate the impact of fluid-structure interactions on thrombus development and characteristics.

Main Methods:

  • A two-phase computational model tracking platelet populations and activating chemical concentration.
  • Incorporation of elastic bond formation for platelet cohesion and thrombus structure.
  • Coupling of bound platelet material and bulk fluid through interphase drag and incompressibility constraints.

Main Results:

  • The two-phase model allows for higher bound platelet densities and physiological thrombus formation timescales.
  • Computational results reveal significant spatial inhomogeneities within platelet thrombi due to complex fluid-structure interactions.
  • Intraclot flow dynamics were found to significantly influence thrombus growth, density, and stability.

Conclusions:

  • The two-phase model provides a more realistic simulation of platelet aggregation and thrombus formation compared to single-phase models.
  • Fluid-structure interactions play a crucial role in the development of heterogeneous and dynamic thrombi.
  • Further research into intraclot flow is warranted to fully understand thrombus pathophysiology.