Related Experiment Videos
The implantable fuzzy controlled Helmholtz-left ventricular assist device: first in vitro testing
1Helmholtz-Institute for Biomedical Engineering, RWTH, Aachen, Germany.
Artificial Organs
|February 1, 1997
Summary
Researchers developed a new, compact left ventricular assist device (LVAD) with efficient energy conversion and novel perfusion control. In vitro tests confirm its feasibility for enhancing cardiac support.
Area of Science:
- Biomedical Engineering
- Cardiovascular Devices
- Medical Technology
Background:
- Existing left ventricular assist devices (LVADs) face challenges in efficiency and control.
- Development of smaller, lighter, and more efficient implantable cardiac support systems is crucial.
Purpose of the Study:
- To validate a novel pulsatile electromechanical LVAD through experimental testing.
- To assess the performance of a new energy converter, pump design, and perfusion control system.
Main Methods:
- Manufactured a functional lab-type LVAD (65 ml stroke volume, 430 g weight).
- Utilized a reduction and displacement gear for pulsatile motion from a sensorless DC motor.
- Implemented a sensorless fuzzy controller for active output flow adaptation based on motor current.
Main Results:
- Demonstrated efficient energy conversion with the novel gear system.
- Validated the functionality of the sensorless fuzzy perfusion controller.
- Presented preload and afterload-related flow data from in vitro mock loop testing.
Conclusions:
- The developed LVAD is among the smallest and lightest implantable pulsatile electromechanical devices.
- The novel gear and control concept are feasible for implantable pulsatile LVADs.
- Experimental results support the potential of this new LVAD technology for clinical application.