Fig. 4From: Better haemodynamic stability under xenon anaesthesia than under isoflurane anaesthesia during partial nephrectomy – a secondary analysis of a randomised controlled trialLevel of anaesthesia Level of anaesthesia measured by BIS monitoring in the xenon and isoflurane groups at different time points. BIS, bispectral index. The data were analysed using the Mann-Whitney U test and are presented as means ± standard deviation. *P-value < 0.05; **P-value < 0.01Back to article page