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Changes in wall shear stress magnitude after aneurysm rupture
Kenichi Kono1, Nagatsuki Tomura, Ryo Yoshimura
1Department of Neurosurgery, Wakayama Rosai Hospital, 93-1 Kinomoto, Wakayama 640-8505, Japan. vyr01450@gmail.com
Acta Neurochirurgica
|May 30, 2013
Summary
Computational fluid dynamics (CFD) studies on cerebral aneurysms may overestimate rupture risk. Post-rupture shape changes invalidate pre-rupture hemodynamic data, necessitating new CFD research approaches for aneurysm rupture prediction.
Area of Science:
- Neurosurgery
- Biomedical Engineering
- Medical Imaging
Background:
- Computational fluid dynamics (CFD) is used to analyze hemodynamic parameters in cerebral aneurysms.
- Predicting aneurysm rupture risk is crucial for patient management.
- Previous CFD studies have focused on comparing unruptured and ruptured aneurysm hemodynamics.
Observation:
- A case study of bilateral mirror image aneurysms is presented.
- One aneurysm ruptured shortly after imaging.
- Wall shear stress in the ruptured aneurysm changed by 20-30% post-rupture due to shape alteration.
Findings:
- CFD studies comparing pre- and post-rupture states may be invalid.
- Aneurysm shape changes significantly after rupture.
- Observed wall shear stress variations highlight the impact of shape dynamics.
Implications:
- Rethinking CFD methodologies for aneurysm rupture risk assessment is necessary.
- Future CFD research must incorporate dynamic changes in aneurysm geometry.
- Accurate rupture risk prediction requires accounting for post-rupture morphological alterations.
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