Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Journal of Porous Media
Impact-faktor: 1.752 5-jähriger Impact-Faktor: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508

Volumes:
Volumen 23, 2020 Volumen 22, 2019 Volumen 21, 2018 Volumen 20, 2017 Volumen 19, 2016 Volumen 18, 2015 Volumen 17, 2014 Volumen 16, 2013 Volumen 15, 2012 Volumen 14, 2011 Volumen 13, 2010 Volumen 12, 2009 Volumen 11, 2008 Volumen 10, 2007 Volumen 9, 2006 Volumen 8, 2005 Volumen 7, 2004 Volumen 6, 2003 Volumen 5, 2002 Volumen 4, 2001 Volumen 3, 2000 Volumen 2, 1999 Volumen 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v12.i9.50
pages 887-897

Numerical Modeling of Coil Compaction in the Treatment of Cerebral Aneurysms Using Porous Media Theory

Khalil Khanafer
Mechanical Engineering Department, Australian College of Kuwait, Safat, 13015
Ramon Berguer
Vascular Mechanics Laboratory, Department of Biomedical Engineering, and Section of Vascular Surgery, University of Michigan, Ann Arbor, MI 48109, USA
Marty Schlicht
Vascular Mechanics Laboratory, Department of Biomedical Engineering, and Section of Vascular Surgery, University of Michigan, Ann Arbor, MI 48109, USA
Joseph L. Bull
Vascular Mechanics Laboratory, Department of Biomedical Engineering, and Section of Vascular Surgery, University of Michigan, Ann Arbor, MI 48109, USA

ABSTRAKT

A numerical model was developed to quantify the reduction in blood velocity and pressure resulting from the placement of endovascular coils within a cerebral aneurysm using physiological velocity waveforms. The flow characteristics within the aneurysm sac were modeled using the volume-averaged porous media equations. We studied the effects of narrow and wide aneurysmal necks on the velocity fields and pressure within the aneurysmal sac in the absence of the coils. Within the sac at peak systole, wide-neck aneurysms experience higher velocity and pressure than narrow-neck aneurysms. Our study shows that velocity fields are significantly affected by the presence of an endovascular coil within the aneurysm sac. Moreover, we estimated that a volume density of a 20% platinum coil in the aneurysmal sac was sufficient to cause sufficient blood flow arrest in the aneurysm to allow for thrombus formation. A new model based on the porous media theory is proposed for the study of the effects of coiling in brain aneurysms. Porous media theory permits the study of fluid motion across small spaces of variable and complex geometry. A simple formula to calculate the length of platinum wire required to achieve flow arrest within an aneurismal sac of known diameter is presented.


Articles with similar content:

BOUNDARY-LAYER CHARACTERISTICS OF A SWIRL ATOMIZER
Atomization and Sprays, Vol.2, 1992, issue 3
M. I. G. Bloor, M. Ledoux, Christophe Dumouchel, N. Dombrowski, Derek B. Ingham
Numerical Modeling of Pulse Wave Propagation in a Stenosed Artery using Two-Way Coupled Fluid Structure Interaction (FSI)
3rd Thermal and Fluids Engineering Conference (TFEC), Vol.18, 2018, issue
Peshala P. T Gamage, Hansen A Mansy, Fardin Khalili
HEMODYNAMICS OF A CEREBRAL ANEURYSM UNDER REST AND EXERCISE CONDITIONS
International Journal of Energy for a Clean Environment, Vol.19, 2018, issue 1-2
Shivam Patel, Abdullah Y. Usmani
HEMODYNAMICS OF A CEREBRAL ANEURYSM UNDER REST AND EXERCISE CONDITIONS
Second Thermal and Fluids Engineering Conference, Vol.27, 2017, issue
Shivam Patel, Abhishek Sharma, Abdullah Y. Usmani
EXPERIMENTAL VERIFICATION OF TURBULENCE MODELING FOR THE FLOW THROUGH A POROUS MEDIA BY USING PTV
TSFP DIGITAL LIBRARY ONLINE, Vol.7, 2011, issue
Sota Nakajo, Takaaki Shigematsu