Hemodynamics of Intracranial Aneurysms Following Various Stent Implantations

Stent implantation is widely used for treating intracranial aneurysms, with the configuration of the stent critically influencing the hemodynamic characteristics within the aneurysm and thereby affecting its sealing efficiency. This research aims to explore the hemodynamic implications (including blood flow, wall pressure, and wall shear stress) of stent implantation on an idealized anterior cerebral artery following various stent interventions, and to compare the outcomes of aneurysm sealing after different stent placements. The study reveals that partially compressed stent implantation elevates the levels of velocity, pressure, and wall shear stress within the aneurysm in comparison to straight stent placement. Furthermore, as the compression of the stent increases, so does the velocity and wall shear stress within the aneurysm. The use of locally bulging stents also worsens the hemodynamic conditions within the aneurysm relative to straight stent implantation. However, the study also demonstrates that divergent cone stents effectively reduce flow and pressure within the aneurysm when compared to straight stents. It is therefore crucial to consider the potential effects of local incomplete expansion or bulging of the stent on the effectiveness of aneurysm sealing, as well as to adopt measures to prevent stent deformation after placement. Employing a tapered stent might provide a more optimal solution for treating intracranial aneurysms.