Concepts for simplifying automatic blood-gas control during extracorporeal circulation

Abstract

To simplify and improve closed-loop control of the arterial oxygen partial pressure during extracorporeal circulation, three feed-forward control strategies are presented. These are deduced from some common indices of oxygenator performance. A simulation study revealed that these strategies react adequately in case of step-like blood-flow changes. Furthermore it could be shown, that two of the feed-forward strategies also react to changes of the venous conditions and the hemoglobin concentration. © 2009 Springer-Verlag.