The incidence of intraoperative awareness during cardiothoracic surgery is not completely avoidable, due to the special regimen to secure the patients haemodynamic stability in this type of surgery. The aim of this study was to evaluate the security of anaesthesia through adequate monitoring of cerebral functions. In this study we investigated the influence of mild hypothermia and cardiopulmonary bypass on processed EEG-parameters like BIS, SEF 95 and MF during midazolam-remifentanil-anaesthesia. The results show that BIS, in contrast to SEF 95 and MF, indicates an adequate state of anaesthesia during normothermic (36°C) and hypothermic (32°C) phases of surgery, independent of temperature and mean artery pressure. BIS is a good parameter to evaluate the depth of anaesthesia during cardiopulmonary bypass although not all risks for intraoperative awareness are completely diminished by its application.
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The incidence of intraoperative awareness during cardiothoracic surgery is not completely avoidable, due to the special regimen to secure the patients haemodynamic stability in this type of surgery. The aim of this study was to evaluate the security of anaesthesia through adequate monitoring of cerebral functions. In this study we investigated the influence of mild hypothermia and cardiopulmonary bypass on processed EEG-parameters like BIS, SEF 95 and MF during midazolam-remifentanil-anaesthesia...
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