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Proceedings Paper

Design and simulation of an intra-ventricular assistive device for end stage congestive heart failure patients
Author(s): M. Hosseinipour; M. Elahinia
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Paper Abstract

In an attempt to produce a less invasive alternative to current ventricular assistive devices, this study proposes a novel intra-ventricular VAD for end stage congestive heart failure patients. VADs are approved by FDA as Bridge to Transplantation Therapy (BTT), Bridge to Recovery Therapy (BRT) and permanent or Destination Therapy (DT) for patients at NYHA Class IV as an alternative to heart transplant. While all current devices require open-heart surgery, the flexible structure and thin active membrane, made of Ionic Polymer Metal Composites (IPMC) and Shape Memory Alloys (SMA), enables transcatheter implantation and thus eliminates the need for a thoracotomy. Moreover, exerting almost no shear stress on blood cells and having no stagnant points reduces the risk of hemolysis and thrombosis. In order to define the average working conditions and physiological needs, hemodynamics of an eligible patient is first examined. Different motion mechanisms are then evaluated to find the one that has the maximum volume displacement and also mimics the natural motion of the heart. As the preliminary evaluation of the device, 1D results of an FEM solution of the governing differential equation of the electrochemical behavior of IPMCs are found to check the compliancy of IPMCs with those needs defined by hemodynamic and motion analyses. Although modeling and simulation results provided in this paper are for left ventricle, the same progressive design and test processes are also applicable for the right ventricle.

Paper Details

Date Published: 8 April 2013
PDF: 11 pages
Proc. SPIE 8686, Bioinspiration, Biomimetics, and Bioreplication 2013, 86860M (8 April 2013); doi: 10.1117/12.2013846
Show Author Affiliations
M. Hosseinipour, The Univ. of Toledo (United States)
M. Elahinia, The Univ. of Toledo (United States)

Published in SPIE Proceedings Vol. 8686:
Bioinspiration, Biomimetics, and Bioreplication 2013
Raúl J. Martín-Palma, Editor(s)

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