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Design and optimisation of an Intra-Aortic Shrouded rotor axial pump.

Authors :
Oran E
Abo-Serie E
Jewkes J
Henry M
Oran B
Source :
Journal of biomechanics [J Biomech] 2024 Jan; Vol. 162, pp. 111858. Date of Electronic Publication: 2023 Nov 04.
Publication Year :
2024

Abstract

Undesirable side effects in patients with a LVAD (Left Ventricular Assist Device) pump fitted include blood damage, thrombosis, blood traumatisation, and End-Organ Disfunctions. These side effects have generally been attributed to the high wall shear stresses and the induced turbulent flow. In this study, we introduce a novel design to address these effects by lowering the rotational speed and providing an optimum flow path design to minimise blood damage. We present an initial scheme for a new Intra-Aortic Shrouded Rotary Axial Pump and develop a sequence of pump geometries, for which the Taguchi Design Optimisation Method has been applied. We apply CFD tools to simulate the pressure rise, pump performance, hydraulic efficiency, wall shear stress, exposure time and mass flow rate. A prototype pump has been tested in a mock cardiovascular circuit using a water-glycerol solution. The optimum design delivered the desired pressure/mass flow rate characteristics at a significantly low rpm (2900 rpm). As a result, the estimated blood damage index is low, matching the design requirements. The theoretical performance was matched by experimental results.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Crown Copyright © 2023. Published by Elsevier Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1873-2380
Volume :
162
Database :
MEDLINE
Journal :
Journal of biomechanics
Publication Type :
Academic Journal
Accession number :
37989028
Full Text :
https://doi.org/10.1016/j.jbiomech.2023.111858