Integrated EEG monitoring system of brain functions during operations

In some cases, it is necessary to occlude the blood flow in a part of the brain during the surgical procedure. In such cases, it is very important to monitor brain functions, and to do appropriate treatment in order to minimize the postoperative complication. At present, several kinds of equipment specialized to monitor single modality are being used simultaneously. The aim of this study was to develop an EEG monitoring system which integrates various analyzing methods. It can indicate not only single modality information but also multi modality. In addition, the system has great advantages. It can provide complex diagnostic information by synthesizing the results of the multi modality analysis. The system consists of data acquisition, waveform memory management, and data analysis parts. To add a new analyzing method, a corresponding module was added in this part. This system can be used without difficulty because it is composed of simple modules. The first experimental system with the above architecture was made.