Computational modeling of the fluid flow in type B aortic dissection using a modified finite element embedded formulatio
- PDF / 3,841,387 Bytes
- 19 Pages / 595.276 x 790.866 pts Page_size
- 40 Downloads / 157 Views
ORIGINAL PAPER
Computational modeling of the fluid flow in type B aortic dissection using a modified finite element embedded formulation Rubén Zorrilla1,2,3 · Eduardo Soudah1,2 · Riccardo Rossi1,2 Received: 2 September 2019 / Accepted: 14 January 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This work explores the use of an embedded computational fluid dynamics method to study the type B aortic dissection. The use of the proposed technique makes it possible to easily test different intimal flap configurations without any need of remeshing. To validate the presented methodology, we take as reference test case an in vitro experiment present in the literature. This experiment, which considers several intimal flap tear configurations (number, size and location), mimics the blood flow in a real type B aortic dissection. We prove the correctness and suitability of the presented approach by comparing the pressure values and waveform. The obtained results exhibit a remarkable similarity with the experimental reference data. Complementary, we present a feasible surgical application of the presented computer method. The aim is to help the clinicians in the decision making before the type B aortic dissection surgical fenestration. The capabilities of the proposed technique are exploited to efficiently create artificial reentry tear configurations. We highlight that only the radius and center of the reentry tear need to be specified by the clinicians, without any need to modify neither the model geometry nor the mesh. The obtained computational surgical fenestration results are in line with the medical observations in similar clinical studies. Keywords Aortic dissection · Surgical fenestration · Phantom model · CFD · Embedded mesh methods · Level set methods · Bio-mechanics · Open source
1 Introduction The aortic dissection (AD) is a cardiovascular disease that results from the tearing of the inner layer of the aortic wall. The blood flow emerging through the tear causes the dissection of the inner (intima) and middle (media) layers of the aorta. The AD is a very severe pathology which often becomes fatal when the blood-filled channel silently ruptures through the outer (adventitia) aortic wall. An early diagnosis and aortic wall resistance assessment are therefore required to prevent the AD to reach such catastrophic scenario. ADs are classified according to the location of the dissection. Hence, those ADs located in either the ascending
* Rubén Zorrilla [email protected] 1
Centre Internacional de Mètodes Numèrics en Enginyeria, CIMNE, Barcelona, Spain
2
Universitat Politècnica de Catalunya, UPC, Barcelona, Spain
3
Present Address: CIMNE, C. Gran Capità s/n, Edifici B0, Campus Nord, UPC, 08034 Barcelona, Spain
region of the aorta or the aortic arch are denoted as ascending ADs or type A ADs. On the contrary, those ADs located in the descending region of the aorta are denoted as descending ADs or type B ADs. Type A ADs typically require surgical interventions, while type
Data Loading...
