Noninvasive pulsatile flow estimation for an implantable rotary blood pump

Karantonis, D. M., Cloherty, S. L., Mason, D.G., Ayre, P. J. and Lovell, H. H. (2007). Noninvasive pulsatile flow estimation for an implantable rotary blood pump. In: Proceedings of the 29th Annual International Conference of the IEEE EMBS. 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2007), Lyon, France, (1018-1021). 23-26 August 2007. doi:10.1109/IEMBS.2007.4352467


Author Karantonis, D. M.
Cloherty, S. L.
Mason, D.G.
Ayre, P. J.
Lovell, H. H.
Title of paper Noninvasive pulsatile flow estimation for an implantable rotary blood pump
Conference name 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2007)
Conference location Lyon, France
Conference dates 23-26 August 2007
Proceedings title Proceedings of the 29th Annual International Conference of the IEEE EMBS   Check publisher's open access policy
Journal name 2007 Annual International Conference of the Ieee Engineering in Medicine and Biology Society, Vols 1-16   Check publisher's open access policy
Place of Publication Piscataway, NJ, U.S.A.
Publisher IEEE - Institute of Electrical Electronics Engineers Inc.
Publication Year 2007
Sub-type Fully published paper
DOI 10.1109/IEMBS.2007.4352467
ISBN 978-1-4244-0787-3
ISSN 1557-170X
Start page 1018
End page 1021
Total pages 4
Language eng
Abstract/Summary A noninvasive approach to the task of pulsatile flow estimation in an implantable rotary blood pump (iRBP) has been proposed. Employing six fluid solutions representing a range of viscosities equivalent to 20-50% blood hematocrit (HCT), pulsatile flow data was acquired from an in vitro mock circulatory loop. The entire operating range of the pump was examined, including flows from -2 to 12 L/min. Taking the pump feedback signals of speed and power, together with the HCT level, as input parameters, several flow estimate models were developed via system identification methods. Three autoregressive with exogenous input (ARX) model structures were evaluated: structures I and II used the input parameters directly; structure II incorporated additional terms for HCT; and the third structure employed as input a non-pulsatile flow estimate equation. Optimal model orders were determined, and the associated models yielded minimum mean flow errors of 5.49% and 0.258 L/min for structure II, and 5.77% and 0.270 L/min for structure III, when validated on unseen data. The models developed in this study present a practical method of accurately estimating iRBP flow in a pulsatile environment.
Subjects 0903 Biomedical Engineering
1102 Cardiovascular Medicine and Haematology
Keyword Implantable rotary blood pump
Noninvasive pulsatile flow estimation
Blood hematocrit
Flow estimate models
Q-Index Code E1

 
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