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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.

andrzej.polanczyk@gmail.com

Computational 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