Title :
Response of the elastance-based control due to changes in afterload and contractility
Author :
Baloa, L.A. ; Boston, J.R. ; Antaki, J.F.
Author_Institution :
Pittsburgh Univ., PA, USA
Abstract :
An elastance-based control (EBC) algorithm has been developed to produce a Frank-Starling response in a mockloop used for evaluation of ventricular assist devices. In this paper, the EBC has been tested for changes in contractility and afterload in order to evaluate its capabilities of mimicking the natural heart response. The results have shown that the end-systolic pressure-volume relationship remains fixed despite changes in afterload and reduction in end systolic pressure with decreasing contractility changes. The EBC algorithm has shown performance similar to the natural heart in response to afterload and contractility changes
Keywords :
biocontrol; cardiovascular system; haemodynamics; pressure control; prosthetics; three-term control; volume control; Frank-Starling response; PID controller; afterload changes; cardiovascular devices; chamber embedded piston; contractility changes; elastance-based control algorithm; end-systolic pressure-volume relationship; mock circulatory loop; natural heart response mimicking; ventricular assist devices; Biomedical measurements; Clamps; Electrostatic precipitators; Heart; Pistons; Pressure control; Pressure measurement; Testing; Three-term control; Volume measurement;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.802295
