NDLI: Speed control of the Implantable Centrifugal Blood Pump to avoid aortic valve stenosis: Simulation and implementation

Content Provider	IEEE Xplore Digital Library
Author	Leao, T. Fonseca, J. Bock, E. Sa, R. Utiyama, B. Drigo, E. Leme, J. Andrade, A.
Copyright Year	2014
Description	Author affiliation: Fac. of Med., Univ. of Sao Paulo, Sao Paulo, Brazil (Leao, T.; Andrade, A.) \|\| Inst. Dante Pazzanese of Cardiology, Sao Paulo, Brazil (Fonseca, J.) \|\| Fed. Inst. of Technol. of Sao Paulo, Sao Paulo, Brazil (Bock, E.; Sa, R.; Utiyama, B.; Drigo, E.; Leme, J.)
Abstract	This paper presents a computational simulation and implementation of electromechanical actuator performance of the Implantable Centrifugal Blood Pump (ICBP) as part of a speed controller study to avoid aortic valve stenosis. The ICBP as Left Ventricular Assist Device (LVAD) is an electromechanical device designed for long-term assist left heart in performing its functions. The centrifugal pumps are controlled by varying the rotor (impeller) speed. ICBP successful operation depends on an appropriate rotational speed control system, ensuring: 1) no reverse flow through the pump during left ventricle diastolic phase, and 2) aortic valve correct opening, avoiding later valve stenosis. A computational model of the actuator done in Matlab / Simulink (R2010b, Mathworks, Massachusetts, USA) was used in the simulations. Control and signal processing was used Labview (National Instruments, Austin, USA). Signals equivalent to intraventricular pressure and a variable rotational reference were used to evaluate motor and speed controller performance. Speed values were chosen so that pressure pump exceeds intraventricular pressure only after the opening of aortic valve. The proposed controller is Proportional-Integral (PI) type. The simulation results were satisfactory, no steady error in response speed. Practical tests showed satisfactory results to follow speed reference signal, as simulated. Future studies will evaluate the bands control.
Starting Page	82
Ending Page	86
File Size	520158
Page Count	5
File Format	PDF
ISBN	9781479931262
ISSN	21551774
e-ISBN	9781479931286
DOI	10.1109/BIOROB.2014.6913756
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-12
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heart Actuators Torque Computational modeling Valves Mathematical model Blood
Content Type	Text
Resource Type	Article

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