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Drive optimisation of a pulsatile Total Artificial Heart

Pohlmann A., Lessmann M., Finocchiaro T., Fritschi A., Steinseifer U., Schmitz-Rode T., Hameyer K.

Archives of Electrical Engineering

2011

Vol. 60, nr 2

169-178

Total Artificial Hearts (TAHs) are required for the therapy of terminal heart diseases as heart transplants are only a limited option due to the available number of donor hearts. For implantation TAHs have to meet constraints regarding its dimensions, weight, perfusions and electrical losses. An innovative linear driven TAH is presented, which meets all constraints except weight. Therefore the geometry of the linear drive is optimised to reduce its weights while simultaneously limiting the electrical losses as much as possible. In order to calculate the losses, this paper introduced a combined calculation chain consisting of FEM simulations and analytical equations. Based on this chain the linear drive is optmised by the method of parameter variations. The results yield a hierachic order of parameters which are most suitable for the weight reduction of the drive for low losses. By this the weight of the linear drive is reduced by 25%. As the allowable loss limit is not exceeded yet, room for further weight reduction achieved by an optimisation of the axial geomtry parameters is given.

Mechanical circulatory support systems at Tokyo Medical and Dental University

Ohuchi K., Hoshi H., Watanabe N., Kido K., Yokoyama Y., Asama J., Shinshi T., Shimokohbe A., Yoshikawa M., Takatani M.

Biocybernetics and Biomedical Engineering

2007

Vol. 27, no. 1-2

161-167

This paper describes mechanical circulatory support devices (MCSD) which are under development at Tokyo Medical and Dental University in collaboration with Tokyo Institute of Technology. They include para-corporeal magnetic levitated (Mag-lev) centrifugal blood pump, implantable Mag-lev centrifugal blood pump, extra-corporeal pediatric centrifugal blood pump, and implantable pulsatile ventricular assist device (VAD) and totally replacement artificial heart system.