DocumentCode :
2114369
Title :
Fluid Structure Interaction Simulation of Left Ventricular Flow Dynamics under Left Ventricular Assist Device Support
Author :
Ong, C.W. ; Chan, B.T. ; Lim, Eul-Gyoon ; Abu Osman, N.A. ; Abed, Ali A. ; Dokos, Socrates ; Lovell, Nigel H.
Author_Institution :
Dept. of Biomed. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia
fYear :
2012
fDate :
Aug. 28 2012-Sept. 1 2012
Firstpage :
6293
Lastpage :
6296
Abstract :
For patient´s receiving mechanical circulatory support, malfunction of the left ventricular assist device (LVADs) as well as mal-positioning of the cannula imposes serious threats to their life. It is therefore important to characterize the flow pattern and pressure distribution within the ventricle in the presence of an LVAD. In this paper, we present a 2D axisymmetric fluid structure interaction model of the passive left ventricle (LV) incorporating an LVAD cannula to simulate the effect of the LVAD cannula placement on the vortex dynamics. Results showed that larger recirculation area was formed at the cannula tip with increasing cannula insertion depth, and this is believed to reduce the risk of thrombus formation. Furthermore, we also simulated suction events (collapse of the LV) by closing the inlet. Vortex patterns were significantly altered under this condition, and the greatest LV wall displacement was observed at the part of the myocardium closest to the cannula tip.
Keywords :
biological fluid dynamics; biomedical equipment; cardiology; haemodynamics; vortices; 2D axisymmetric fluid structure interaction model; LV wall displacement; LVAD cannula placement; cannula insertion depth; cannula tip; flow pattern; large recirculation area; left ventricular assist device support; left ventricular flow dynamics; mal-positioning; mechanical circulatory support; myocardium; passive left ventricle; pressure distribution; thrombus formation; vortex dynamics; vortex patterns; Computational fluid dynamics; Heart; Myocardium; Numerical models; Solids; LVAD; cannula; heart pump; suction; vortex; Heart Ventricles; Heart-Assist Devices; Humans; Models, Theoretical;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2012 Annual International Conference of the IEEE
Conference_Location :
San Diego, CA
ISSN :
1557-170X
Print_ISBN :
978-1-4244-4119-8
Electronic_ISBN :
1557-170X
Type :
conf
DOI :
10.1109/EMBC.2012.6347433
Filename :
6347433
Link To Document :
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