Fluid-structure simulation of (DAV) InCor pulsatile pediatric ventricular assist device

Abstract

In this research, we will address a set of computational techniques for fluid-structure interaction (FSI) that allow realistic simulations of fluid dynamics within the DAV INCOR pulsatile pediatric ventricular assist device. The simulations involve dynamic interaction between two compartments filled with air and blood and a thin membrane separating the two compartments.Heart failure is an important cause of morbidity and mortality and a survival of approximately 2 to 3 years after diagnosis. Although a small number of patients may qualify for heart transplants, this is limited by strict selection criteria and lack of availability of donor hearts. In industrialized countries, patients with advanced heart failure without response to pharmacological treatment have options for using mechanical circulatory assistance devices until waiting for heart transplantation. In Brazil, due to the high cost of imported systems, the use of ventricular assist devices is practically inexistent, justifying the development of a national technology. This work aims to contribute to the development of the pediatric VAD INCOR. The computational approach adopted in this work will include the large buckling movements of the DAV membrane and the need to employ strongly coupled FSI solution strategies due to the mass effect present. The FSI methods will help to study the behavior of the fluid and the structure of the DAV, and also their interaction with each other.