Abstract
A preliminary experimental model of the automatic microcomputer regulation system for extracorporeal circulation was developed. This experimental system consistes of three main parts, that is, 1) input device for data sampling, 2) central processing unit for data analysis and recording as well as real time monitoring, and 3) output device while controls each module. These modules are organized together with microcomputer by means of analyzing these data series and regulating each controlling device under the programmed conditions. The present study reports the basic principles of the automatic regulation and the outline of this system both from in vitro and in vivo experiments using canine. As a result, we could get 1) a good simulation curve in accordance with pump flow and blood pressure both in vitro and in vivo studies. 2) It was very easy to change software parameters for automatic regulation. 3) It showed a quite reasonable response to any accidents such as line occlusion or sudden decrease of blood volume in reservoir. In addition, this system could be handy because of its'easy add-on system with minimal modification to prevalant type of pump systems.
