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Title of Journal: Med Biol Eng Comput

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Abbravation: Medical & Biological Engineering & Computing

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Springer Berlin Heidelberg

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DOI

10.1002/zaac.200700336

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ISSN

1741-0444

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Computational fluid dynamicsbased study of possib

Authors: Erfan Nammakie Hanieh NiroomandOscuii Mojtaba Koochaki Farzan Ghalichi
Publish Date: 2016/05/27
Volume: 55, Issue: 1, Pages: 167-178
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Abstract

Until recent years it was almost beyond remedy to save the life of endstage heart failure patients without considering a heart transplant This is while the need for healthy organs has always far exceeded donations However the evolution of VAD technology has certainly changed the management of these patients Today blood pumps are designed either pulsatile flow or continuous flow each of which has its own concerns and limitations For instance pulsatile pumps are mostly voluminous and hardly can be used for children On the other hand the flow generated by continuousflow pumps is in contrast with pulsatile flow of the natural heart In this project having used computational fluid dynamics we studied the possibility of generating pulsatile blood flow via a continuousflow blood pump by adjusting the rotational speed of the pump with two distinct patterns sinusoidal and trapezoidal both of which have been proposed and set based on physiological needs and blood flow waveform of the natural heart An important feature of this study is setting the outlet pressure of the pump similar to the physiological conditions of a patient with heart failure and since these axial pumps are sensitive to outlet pressures more secure and reliable results of their performance are achieved Our results show a slight superiority of a sinusoidal pattern compared to a trapezoidal one with the potential to achieve an adequate pulsatile flow by precisely controlling the rotational speed

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