Extracorporeal Circulation Automation: Application of Control Theory Concepts

Extracorporeal circulation (ECC) is a technique which substitutes the pulmonary and cardiac functions of a patient during open heart surgery. Closed loop control of ECC can prevent some of the risks attached to the use of this technique. The ECC consists of strongly interconnected hemodynamic, bioch...

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Bibliographic Details
Published inIFAC Proceedings Volumes Vol. 22; no. 6; pp. 487 - 490
Main Authors Van Meurs, W.L., Chauveau, N., Morucci, J.P., Barthelemy, R.
Format Journal Article
LanguageEnglish
Published 01.07.1989
Subjects
adaptive control
closed loop systems
control theory
Extracorporeal circulation
modelling
nonlinear systems
simulation
closed loop systems
nonlinear systems
control theory
simulation
adaptive control
modelling
Extracorporeal circulation
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Summary:Extracorporeal circulation (ECC) is a technique which substitutes the pulmonary and cardiac functions of a patient during open heart surgery. Closed loop control of ECC can prevent some of the risks attached to the use of this technique. The ECC consists of strongly interconnected hemodynamic, biochemical and thermodynamic sub-systems. To come to global modelling and control of the cardiopulmonary bypass, ECC is described in terms of the control theory concepts : command, disturbance, state, output, parameter, reference and constraints. If ECC is considered in the hypothermic phase, four sub-systems can be distinguished. These sub-systems are characterized by their state variables : hematocrit, blood volumes, vasomotor tone and blood gases and buffer capacity. The need for nonlinear models and/or adaptive control is noted. A simulation model for ECC hemodynamics is given.
ISSN:1474-6670
DOI:10.1016/S1474-6670(17)54424-9