A Methodological Approach For The
Optimisation Of Modern Rotary Blood Pumps
Author(s)
D. Palmieri, G. Vezzani, F. Lagasco, P. Nüsser, K. Graichen
& B. Wieneke
Abstract
Particle Image Velocimetry (PIV) analysis and Computational Fluid Dynamics
(CFD) simulations have been performed on an innovative prototype of an
implantable rotary axial pump. Numerically and experimentally estimated
velocity and shear stress fields have been compared on several planes at different
distances from the pump axis. An excellent agreement was generally observed in
terms of mean flow velocity and viscous stresses, while the congruence of
turbulent stresses was very good in some cases and less accurate in others.
Further effort will be needed on both the numerical and the experimental side to
better characterise near-wall flow features.
Keywords: blood pump, PIV, CFD.
1 Introduction
Mechanical support offered by rotary pumps is well known in cardiac diseases
therapy. The range of applications spans from cardiac support prior to
transplantation (Bridge to Transplant) to heart assistance to recovery (Bridge to
Recovery). Rotary blood pumps are attractive in this respect because of its
simplicity and small size. In particular, implantable pumps must be extremely
compact, and overcome the problems of inaccessibility by highly reliable shaft
seals and bearings. Technical evolution of these devices offers great perspectives
for the continuous increase of the patient’s mobility and comfort.
The hydrodynamic design of such devices is very complex because of the
detailed characterisation of the blood flow required to identify potential areas of
Keywords
blood pump, PIV, CFD.
Related Book
Other papers in this volume
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