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.
andrzej.polanczyk@gmail.comComputational fluid dynamic approach to mimic changes of
blood hemodynamic in patients with acute type IIIb aortic
dissection treated with TEVAR
Andrzej Polanczyk
1, 2
, Aleksandra Piechota Polanczyk
3
, Martin Funovics
1
, Chris-
toph Domenig
1
, Josif Nanobashvili
1
, Christoph Neumayer
1
and
Ihor Huk
1
1
Medical University of Vienna, Austria
2
Lodz University of Technology, Poland
3
Jagiellonian University, Poland
Andrzej Polanczyk et al., J Vasc Endovasc Therapy 2018, Volume 3
DOI: 10.21767/2573-4482-C1-002