Fluid structure interaction simulation of left ventricular flow dynamics under left ventricular assist device support

Ong, C.W. and Chan, B.T. and Lim, E. and Abu Osman, Noor Azuan and Abed, A.A. and Dokos, S. and Lovell, N.H. (2012) Fluid structure interaction simulation of left ventricular flow dynamics under left ventricular assist device support. In: International Conference of the IEEE Engineering in Medicine and Biology Society, 28 Aug - 1 Sep 2012, San Diego, California.

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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

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: LVAD, heart pump, cannula, suction, vortex
Subjects: R Medicine > R Medicine (General)
Depositing User: Mr. Mohd Samsul Ismail
Date Deposited: 23 Sep 2015 01:06
Last Modified: 07 Feb 2019 08:50
URI: http://eprints.um.edu.my/id/eprint/14126

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