Aortic flow patterns resulting from right axillary artery cannulation

Demertzis, Stefanos; Tevaearai, Hendrik; Carrel, Thierry; Vandenberghe, Stijn (2011). Aortic flow patterns resulting from right axillary artery cannulation. Interactive cardiovascular and thoracic surgery, 12(6), 973-7; discussion 977. Oxford: Oxford University Press 10.1510/icvts.2010.254250

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Right axillary artery (RAA) cannulation is increasingly used in cardiac surgery. Little is known about resulting flow patterns in the aorta. Therefore, flow was visualized and analyzed. A mock circulatory circuit was assembled based on a compliant transparent anatomical silicon aortic model. A RAA cannula was connected to a continuous flow rotary blood pump (RBP), pulsatile heart action was provided by a pneumatic ventricular assist device (PVAD). Peripheral vascular resistance, regional flow and vascular compliance were adjusted to obtain physiological flow and pressure waveforms. Colorants were injected automatically for flow visualization. Five flow distributions with a total flow of 4 l/min were tested (%PVAD:%RBP): 100:0, 75:25, 50:50, 25:75, 0:100. Colorant distribution was assessed using quantitative 2D image processing. Continuous flow from the RAA divided in a retrograde and an antegrade portion. Retro- to antegrade flow ratio increased with increasing RAA-flow. At full RBP support flow was stagnant in the ascending aorta. There were distinct flow patterns between the right- and left-sided supra-aortic branches. At full RBP support retrograde flow was demonstrated in the right carotid and right vertebral arteries. Further studies are needed to confirm and evaluate the described flow patterns.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiovascular Surgery
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Cardiovascular Engineering (CVE)

UniBE Contributor:

Demertzis, Stefanos; Tevaearai, Hendrik; Carrel, Thierry and Vandenberghe, Stijn

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

1569-9293

Publisher:

Oxford University Press

Language:

English

Submitter:

Francesco Clavica

Date Deposited:

04 Oct 2013 14:20

Last Modified:

10 Apr 2014 02:07

Publisher DOI:

10.1510/icvts.2010.254250

PubMed ID:

21398649

Web of Science ID:

000309997000024

URI:

https://boris.unibe.ch/id/eprint/6608 (FactScience: 211604)

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