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Page 34
May 24-25, 2018
London, UK
Vascular Surgery 2018
3 rd Edition of World Congress & Exhibition on
Vascular Surgery
Journal of Vascular and Endovascular Therapy
ISSN: 2573-4482
Introduction: We aimed to verify the accuracy of computational
fluid dynamics (CFD) algorithm for blood flow reconstruction
for type IIIb aortic dissection (TBAD) before and after thoracic
endovascular aortic repair (TEVAR).
Methods: 3D models of the aorta with adjacent arteries were
prepared using pre- and post-operative CT data from five
patients treated for TBAD. The displacement forces acting on
the aortic wall in the areas of endograft, mass flow rate/velocity
and wall shear stress (WSS) was calculated with CFD technique.
Results were verified with ultrasonography (USG) data.
Results: CFD results indicated that TEVAR procedure caused
7-fold improvement in overall blood flow through the aorta
(p=0.0001). The accuracy of CFD calculations for pre-TEVAR vs.
post-TEVAR were 90% and 96%, respectively. Results from CFD
also indicated a significant increase in flow rate for thoracic
trunk and renal arteries, which was in accordance with USG data
(accuracy 90% and 99.9%). Additionally, a significant decrease
in wall shear stress (WSS) values within the whole aorta after
TEVAR compared to pre-TEVAR was showed (1.34±0.20 Pa
vs. 3.80±0.59 Pa, respectively, p=0.0001). This decrease was
provided by a significant reduction in WSS and WSS contours in
the thoracic aorta and renal arteries.
Conclusions: CFD technique confirmed that post-operative
remodeling of the aorta after TEVAR for TBAD improved
hemodynamic patterns reflected by flow, velocity and WSS with
accuracy of 99%.
Recent Publications
1. Polanczyk A, Podyma M, Trebinski L, Chrzastek J,
Zbicinski I and Stefanczyk L (2016) A novel attempt
to standardize results of CFD simulations basing on
spatial configuration of aortic stent-grafts. PLoS One
11:e0153332.
2. Polanczyk A, Podyma M, Stefanczyk L, Szubert W and
Zbicinski I (2015) A 3D model of thrombus formation
in a stent-graft after implantation in the abdominal
aorta. J Biomech. 48:425-431.
3. Duvernois V, Marsden A L and Shadden S C (2013)
Lagrangian analysis of hemodynamics data from FSI
simulation. Int J Numer Method Biomed Eng. 29:445-
461.
4. Cheng Z, Juli C, Wood N B, Gibbs R G and Xu X Y (2014)
Predicting flow in aortic dissection: comparison
of computational model with PC-MRI velocity
measurements. Med Eng Phys. 36:1176-1184.5.
5. Yu S C, Liu W, Wong R H, Underwood M and Wang D
(2016) The potential of computational fluid dynamics
simulation on serial monitoring of hemodynamic
change in type B aortic dissection. Cardiovasc
Intervent Radiol. 39(8):1090-1098.
Biography
Andrzej Polanczyk is a Researcher and a TeamLeader at the Lodz University
of Technology (Poland). He earned a PhD in Medical Engineering in 2013.
He participated in scientific grants in which he build the installation to simu-
late the blood flow through the abdominal section of the aorta. Recently he
received a grant funded by the National Centre for Research and Develop-
ment. His research areas comprise biomedical, chemical and environmental
engineering.
Computational fluid dynamic approach to mimic changes of
blood hemodynamic in patients with acute type IIIb aortic
dissection treated with TEVAR
Andrzej Polanczyk1, 2, Aleksandra Piechota Polanczyk3, Martin Funovics1 , Chris-
toph Domenig1, Josif Nanobashvili1, Christoph Neumayer1 and Ihor Huk1
1Medical University of Vienna, Austria
2Lodz University of Technology, Poland
3Jagiellonian University, Poland
Andrzej Polanczyk et al., J Vasc Endovasc Therapy 2018, Volume 3
DOI: 10.21767/2573-4482-C1-002