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On-line pressure estimation for a left heart assist device.
1Department of Mechanical System Engineering, Faculty of Computer Science and System Engineering, Kyushu Institute of Technology, Fukuoka, Japan.
IEEE Transactions on Bio-Medical Engineering
|October 1, 1990
Summary
This study presents a novel on-line pressure estimation technique for artificial hearts, enabling accurate blood pressure monitoring. The method uses physical models and readily available data for reliable control of circulatory assist devices.
Area of Science:
- Biomedical Engineering
- Cardiovascular Technology
Background:
- Continuous blood pressure monitoring is crucial for managing artificial hearts and circulatory assist devices.
- Existing direct measurement methods have faced reliability challenges.
Purpose of the Study:
- To develop and validate an on-line pressure estimation technique for a portable pneumatically driven left heart assist device.
- To provide accurate, real-time pressure data for improved device control.
Main Methods:
- Utilized on-line maximum likelihood algorithms based on physical models of the driver and blood pump system.
- Estimated blood pump inlet and outlet pressures using measured driving air pressure and piston position.
- Validated the technique through in vitro and in vivo experiments.
Main Results:
- Demonstrated successful linear correlations between estimated and actual blood pressures.
- The technique accurately estimated both inlet and outlet pressures of the blood pump.
- Confirmed the feasibility of using driving air pressure and piston position for estimation.
Conclusions:
- The developed on-line pressure estimation technique provides accurate pressure information for real-time control of left heart assist devices.
- Offers advantages including transducer accessibility for recalibration and noninvasive transducer placement.
- Represents a significant advancement in monitoring technology for artificial circulatory systems.