Document Detail


A method for control of an implantable rotary blood pump for heart failure patients using noninvasive measurements.
MedLine Citation:
PMID:  21843286     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We propose a deadbeat controller for the control of pulsatile pump flow (Q(p) ) in an implantable rotary blood pump (IRBP). Noninvasive measurements of pump speed and current are used as inputs to a dynamical model of Q(p) estimation, previously developed and verified in our laboratory. The controller was tested using a lumped parameter model of the cardiovascular system (CVS), in combination with the stable dynamical models of Q(p) and differential pressure (head) estimation for the IRBP. The control algorithm was tested with both constant and sinusoidal reference Q(p) as input to the CVS model. Results showed that the controller was able to track the reference input with minimal error in the presence of model uncertainty. Furthermore, Q(p) was shown to settle to the desired reference value within a finite number of sampling periods. Our results also indicated that counterpulsation yields the minimum left ventricular stroke work, left ventricular end diastolic volume, and aortic pulse pressure, without significantly affecting mean cardiac output and aortic pressure.
Authors:
Einly Lim; Abdul-Hakeem H Alomari; Andrey V Savkin; Socrates Dokos; John F Fraser; Daniel L Timms; David G Mason; Nigel H Lovell
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Artificial organs     Volume:  35     ISSN:  1525-1594     ISO Abbreviation:  Artif Organs     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-08-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7802778     Medline TA:  Artif Organs     Country:  United States    
Other Details:
Languages:  eng     Pagination:  E174-80     Citation Subset:  IM    
Copyright Information:
© 2011, Copyright the Authors. Artificial Organs © 2011, International Center for Artificial Organs and Transplantation and Wiley Periodicals, Inc.
Affiliation:
Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia School of Electrical Engineering and Telecommunications Graduate School of Biomedical Engineering, The University of New South Wales, Sydney, NSW Critical Care Research Group, The Prince Charles Hospital Department of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Queensland, Australia.
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