Intelligent control design for heart assist devices

Boston, J.R.; Simaan, M.A.; Antaki, James F.; Yu, Yih‐Choung; Choi, Seongjin

doi:10.1109/isic.1998.713712

Cited by 25 publications

(14 citation statements)

References 9 publications

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“…We have proposed incorporating the pulsatility control approach as one component in a hierarchical control structure [21]. In the proposed system, the residual pulsatility and adequacy of the index reference would be evaluated using system identification techniques, and other control strategies would be used when suitable conditions for pulsatility control are not present.…”

Section: Discussionmentioning

confidence: 99%

A sensorless approach to control of a turbodynamic left ventricular assist system

Choi

Antaki

Boston

et al. 2001

IEEE Trans. Contr. Syst. Technol.

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A fuzzy logic controller for a rotary, turbodynamic left ventricular assist system was developed to optimize the delivery of blood flow without inducing suction in the ventricle. The controller is based on the pulsatility in blood flow through the pump and assumes that the natural heart is still able to produce some pumping action. To avoid the use of flow transducers, which are not reliable for long term use, the controller estimates flow using a model of the assist device. The controller was tested in computer simulation, a mock circulatory system, and in animal experiments. Simulation studies suggest that the fuzzy logic controller is more robust to parameter changes than a traditional proportional-integral (PI) controller. Experimental results in animals showed that the controller is able to provide satisfactory flows at adequate perfusion pressures while avoiding suction in the left ventricle.Index Terms-Flow estimate, flow pulsatility, fuzzy control, rotary heart pump control, ventricular assist device. Manuscript

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Section: Discussionmentioning

confidence: 99%

A sensorless approach to control of a turbodynamic left ventricular assist system

Choi

Antaki

Boston

et al. 2001

IEEE Trans. Contr. Syst. Technol.

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“…The University of Pittsburgh team headed by Antaki have reported the implementation of various control indices, including those based on flow pulsatility (4), pulsatility ratio (defined as flow pulsatility divided by head pulsatility) (14,15), and strategies using a combination of indices to satisfy several constraints (24,45,53,54). Studies by Fu and Xu (17) and Endo et al.…”

Section: Discussionmentioning

confidence: 99%

“…A number of control strategies have been proposed by various research groups in the area of RBP control (7,(15)(16)(17)(18)20,(22)(23)(24)(45)(46)(47)(48). Two of the most popular strategies involve control of the pulse amplitude (or pulsatility) of either a pump feedback signal (speed or current) or pump flow (either estimated or measured) and the differential pressure generated by the pump.…”

Section: Existing Control Strategies For Comparisonmentioning

confidence: 99%

“…tility (4), pulsatility ratio (defined as flow pulsatility divided by head pulsatility) (14,15), and strategies using a combination of indices to satisfy several constraints (24,45,53,54). Studies by Fu and Xu (17) Giridharan et al (18)(19)(20)(21) proposed that maintaining an average reference DP was an appropriate strategy for LVAD control, as it indirectly incorporated natural cardiovascular regulation by maintaining a stable MAP.…”

Section: Noninvasive Activity-based Control Of a Rbp E41mentioning

confidence: 99%

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Noninvasive Activity‐based Control of an Implantable Rotary Blood Pump: Comparative Software Simulation Study

et al. 2010

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A control algorithm for an implantable centrifugal rotary blood pump (RBP) based on a noninvasive indicator of the implant recipient's activity level has been proposed and evaluated in a software simulation environment. An activity level index (ALI)-derived from a noninvasive estimate of heart rate and the output of a triaxial accelerometer-forms the noninvasive indicator of metabolic energy expenditure. Pump speed is then varied linearly according to the ALI within a defined range. This ALI-based control module operates within a hierarchical multiobjective framework, which imposes several constraints on the operating region, such as minimum flow and minimum speed amplitude thresholds. Three class IV heart failure (HF) cases of varying severity were simulated under rest and exercise conditions, and a comparison with other popular RBP control strategies was performed. Pump flow increases of 2.54, 1.94, and 1.15 L/min were achieved for the three HF cases, from rest to exercise. Compared with constant speed control, this represents a relative flow change of 30.3, 19.8, and -15.4%, respectively. Simulations of the proposed control algorithm exhibited the effective intervention of each constraint, resulting in an improved flow response and the maintenance of a safe operating condition, compared with other control modes.

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“…In this study the DC motor control system is designed and performed using a chopper circuit, which is used for controlling the speed of the DC motor. The programming in microcontroller analyzes the number of beats per minute, then it provides the chopper circuit with the required number of pulses to control the motor speed that is necessary to provide the body with a specific volume of the blood by PWM method [14]. What distinguishes the ECG feedback is more accurate and efficient in pump and all system.…”

Section: Controlling Systemmentioning

confidence: 99%

Left Ventricular Heart Assist Device using MC and ECG Feedback

Qawasma¹,

Daud²

2017

IJBSBE

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This paper aims to design and implement left ventricular heart assist device (LVAD) system. The main part of the system is a centrifugal pump that pushes blood from the left ventricle to aorta. It is controlled by Arduino Microcontroller (MC). LVAD should be placed between left ventricle and aorta of the heart using a percutaneous lead which is connected to the system controller. This system is considered as closed loop system where it is synchronized with the patient's electrocardiogram (ECG), which provides information about the patient's physiological conditions. A Brushless DC Motor is used to meet the required speed and blood flow rate according to ECG feedback signals. A prototype is designed, built and tested. The testing data are confirmed the results of the mathematical analysis. The system is constructed and programmed to operate automatically in safe mode in case of suddenly occurring failure. All data are monitored and displayed on LCD screen. The system is programmed using C language and fed by using two DC batteries, which placed on either side of the patient in specific holder.

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Intelligent control design for heart assist devices

Cited by 25 publications

References 9 publications

A sensorless approach to control of a turbodynamic left ventricular assist system

A sensorless approach to control of a turbodynamic left ventricular assist system

Noninvasive Activity‐based Control of an Implantable Rotary Blood Pump: Comparative Software Simulation Study

Left Ventricular Heart Assist Device using MC and ECG Feedback

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