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Quantification of visceral perfusion and impact of femoral cannulation: in vitro model of aortic dissection

Authors :
Woon Heo
Gyu-Han Lee
Tae-Hoon Kim
Youngjin Lee
Hyungkyu Huh
Hojin Ha
Suk-Won Song
Kyung-Jong Yoo
Source :
European Journal of Cardio-Thoracic Surgery. 62
Publication Year :
2021
Publisher :
Oxford University Press (OUP), 2021.

Abstract

OBJECTIVES We aimed to simulate blood flow at an aortic dissection in an in vitro vascular model and assess the impact of the cannulation method on visceral perfusion. METHODS An aortic-dissection model with an acrylic aortic wall and silicone intimal flap was developed to study visceral perfusion under various cannulation conditions. The primary tear was placed in the proximal descending aorta and the re-entry site in the left common iliac artery. A cardiovascular pump was used to reproduce a normal pulsatile aortic flow and a steady cannulation flow. Axillary and axillary plus femoral cannulation were compared at flow rates of 3–7 l/min. Haemodynamics were analysed by using four-dimensional flow magnetic resonance imaging. RESULTS Axillary cannulation (AC) was found to collapse the true lumen at the coeliac and superior mesentery arteries, while combined axillary and femoral cannulation did not change the size of the true lumen. Combined axillary and femoral cannulation resulted in a larger visceral flow than did AC alone. When axillary plus femoral cannulation was used, the visceral flow increased by 125% at 3 l/min, by 89% at 4 l/min, by 67% at 5 L/min, by 98% at 6 l/min and by 101% at 7 l/min, respectively, compared to those with the AC only. CONCLUSIONS Our model was useful to understanding the haemodynamics in aortic dissection. In this specific condition, we confirmed that the intimal flap motion can partially block blood flow to the coeliac and superior mesenteric arteries and that additional femoral cannulation can increase visceral perfusion.

Details

ISSN :
1873734X and 10107940
Volume :
62
Database :
OpenAIRE
Journal :
European Journal of Cardio-Thoracic Surgery
Accession number :
edsair.doi.dedup.....398e74b6e0bea4a5629687ecce9cbb49
Full Text :
https://doi.org/10.1093/ejcts/ezab508