Physiological control of implantable rotary blood pumps for heart failure patients

Author

Bakouri, Mohsen A. ; Salamonsen, Robert F. ; Savkin, Andrey V. ; Alomari, Abdul-Hakeem H. ; Einly Lim ; Lovell, Nigel H.

Author_Institution

Sch. of Electr. Eng. & Telecommun., Univ. of New South Wales, Sydney, NSW, Australia

fYear

2013

fDate

3-7 July 2013

Firstpage

675

Lastpage

678

Abstract

In general, patient variability and diverse environmental operation makes physiological control of a left ventricular assist device (LVAD) a complex and complicated problem. In this work, we implement a Starling-like controller which adjusts mean pump flow using pump flow pulsatility as the feedback parameter. The linear relationship between mean pump flow and pump flow pulsatility forms the desired flow of the Starling-like controller. A tracking control algorithm based on sliding mode control (SMC) has been implemented. The controller regulates the estimated mean pulsatile flow (Q̅_p) and flow pulsatility (PI_Qp) generated from a model of the assist device. A lumped parameter model of the cardiovascular system (CVS) was used to test the control strategy. The immediate response of the controller was evaluated by inducing a fall in left ventricle (LV) preload following a reduction in circulating blood volume. The simulation supports the speed and robustness of the proposed strategy.

Keywords

blood; cardiovascular system; feedback; flow control; flow simulation; haemodynamics; medical control systems; prosthetics; pulsatile flow; pumps; robust control; variable structure systems; LVAD; SMC; Starling-like controller; cardiovascular system; circulating blood volume; control strategy; feedback parameter; heart failure patients; implantable rotary blood pumps; left ventricular assist device; lumped parameter model; physiological control; pulsatile flow; pump flow pulsatility; sliding mode control; tracking control algorithm; Blood; Control systems; Educational institutions; Electronic mail; Heart; Mathematical model; Physiology;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE

Conference_Location

Osaka

ISSN

1557-170X

Type

conf

DOI

10.1109/EMBC.2013.6609590

Filename

6609590