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Intra-saccular device modeling for treatment planning of intracranial aneurysms: from morphology to hemodynamics

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Abstract

Motivation

Intra-saccular devices (ID), developed for the treatment of bifurcation aneurysms, offer new alternatives for treating complex terminal and bifurcation aneurysms. In this work, a complete workflow going from medical images to post-treatment CFD analysis is described and used in the assessment of a concrete clinical problem.

Materials and methods

Two different intra-saccular device sizes were virtually implanted in 3D models of the patient vasculature using the ID-Fit method. After deployment, the local porosity at the closed end of the device in contact with the blood flow was computed. This porosity was then used to produce a CFD porous medium model of the device. Velocities and wall shear stress were assessed for each model.

Results

Six patients treated with intra-saccular devices were included in this work. For each case, 2 different device sizes were virtually implanted and 3 CFD simulations were performed: after deployment simulation with each size and before deployment simulation (untreated). A visible reduction in velocities was observed after device implantation. Velocity and WSS reduction was statistically significant (K–S statistics, \(p<0.001\)).

Conclusions

Placement of different device size can lead to a partial filling of the aneurysm, either at the dome or at the neck, depending on the particular positioning by the interventionist. The methodology used in this work can have a strong clinical impact, since it provides additional information in the process of device selection using preoperative data.

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Funding

This project was partly funded by PICT 2016-0116 - FONCYT - ANPCYT of Argentina. N.D. and R. M. are supported by CONICET PhD grant. The Titan V used for this research was donated by the NVIDIA Corporation. The financial support of these institutions is greatly appreciated.

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Correspondence to Nicolás Dazeo.

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HF and IL are Co-Founders of Galgo Medical S.L.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Dazeo, N., Muñoz, R., Narata, A.P. et al. Intra-saccular device modeling for treatment planning of intracranial aneurysms: from morphology to hemodynamics. Int J CARS 16, 1663–1673 (2021). https://doi.org/10.1007/s11548-021-02427-9

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  • DOI: https://doi.org/10.1007/s11548-021-02427-9

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