Comparison of steady-state and transient blood flow simulations of intracranial aneurysms

Annu Int Conf IEEE Eng Med Biol Soc. 2010:2010:2622-5. doi: 10.1109/IEMBS.2010.5626609.

Abstract

Hemodynamics play an important role in the pathogenesis of intracranial aneurysms and patient-specific computational hemodynamic simulations could provide valuable information to clinicians. Transient simulations that capture the pulsatility of blood flow are commonly used for research purposes. However, steady-state simulations might provide enough information at a lower computational cost, which could help facilitate the introduction of hemodynamic simulations into clinical practice. In this study, we compared steady-state simulations to transient simulations for two aneurysms. The effect of a change in flow rate waveform was investigated and virtual treatment techniques were employed to compare post-treatment flow reduction predictions. We found that the difference in the time-averaged wall shear stress on the aneurysm was less than 5% and the distribution of wall shear stress was qualitatively assessed to be very similar.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aneurysm
  • Blood Flow Velocity
  • Carotid Artery, Internal / pathology
  • Cerebral Angiography / methods
  • Cerebrovascular Circulation
  • Computer Simulation
  • Exercise
  • Hemodynamics
  • Humans
  • Intracranial Aneurysm / diagnosis
  • Intracranial Aneurysm / physiopathology*
  • Middle Cerebral Artery / physiopathology
  • Models, Cardiovascular
  • Models, Statistical
  • Stress, Mechanical
  • Time Factors