Coupling one-dimensional arterial blood flow to three-dimensional tissue perfusion models for in silico trials of acute ischaemic stroke: Coupling Blood Flow to Perfusion

Raymond M. Padmos, Tamás I. Józsa, Wahbi K. el-Bouri, Praneeta R. Konduri, Stephen J. Payne, Alfons G. Hoekstra

Research output: Contribution to JournalArticleAcademicpeer-review

15 Citations (Scopus)

Abstract

An acute ischaemic stroke is due to the sudden blockage of an intracranial blood vessel by an embolized thrombus. In the context of setting up in silico trials for the treatment of acute ischaemic stroke, the effect of a stroke on perfusion and metabolism of brain tissue should be modelled to predict final infarcted brain tissue. This requires coupling of blood flow and tissue perfusion models. A one-dimensional intracranial blood flow model and a method to couple this to a brain tissue perfusion model for patient-specific simulations is presented. Image-based patient-specific data on the anatomy of the circle of Willis are combined with literature data and models for vessel anatomy not visible in the images, to create an extended model for each patient from the larger vessels down to the pial surface. The coupling between arterial blood flow and tissue perfusion occurs at the pial surface through the estimation of perfusion territories. The coupling method is able to accurately estimate perfusion territories. Finally, we argue that blood flow can be approximated as steady-state flow at the interface between arterial blood flow and tissue perfusion to reduce the cost of organ-scale simulations.
Original languageEnglish
Article number20190125
Number of pages14
JournalInterface Focus
Volume11
Issue number1
Early online date11 Dec 2020
DOIs
Publication statusPublished - 6 Feb 2021

Keywords

  • acute ischaemic stroke
  • cerebral perfusion
  • one-dimensional blood flow model
  • perfusion territories

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