Study on numerical simulation method of intracranial aneurysms based on porous jump
Objective To study the feasibility and reliability of the flow diverter(FD)constructed based on the simulation of porous jump technology in the numerical simulation of intracranial aneurysm,and to provide theoretical support for stent selection in the clinical treatment of intracranial aneurysms.Methods A digital subtraction angiography(DSA)image of an intracranial aneurysm patient in the Department of Neurosurgery of the Second Hospital of Lanzhou University was included,and the basic geometric model was constructed by Mimics and other software and the FD model was inserted,and the model was further meshed and solved to obtain the distribution of the hemodynamic indexes.Results The hemodynamic indexes were observed and compared with the situation before placement,and it was found that the overall pressure of the aneurysm decreased significantly after the simulated placement of the flow-guiding device;the mean wall shear stress(WSS)of the aneurysm decreased overall,and the high WSS area of the aneurysm decreased significantly;in addition,the FD placement had a significant effect on the generation of vortex volume inside the aneurysm,which greatly reduced the blood flow velocity inside the aneurysm.Conclusion Comparing the data from a large number of previous studies,the results of the numerical simulation of intracranial aneurysm based on the porous jump are consistent with a large number of studies,indicating that the method is valid and feasible,and is faster and more accurate compared with other modeling methods,making it more promising to be applied to clinical treatment activities.
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