Bispectral index (BIS) values and hemodynamic parameters
The primary outcome of the study was the level of sedation achieved by MM, which was assessed with BIS device (Covidien llc Mansfield, MA USA). BIS index, which provides a quantitative measure of sedation to analyze the sedation effect of MM in patients, was used before and during surgeryThe BIS electrodes were placed at the attendance of the patient together with monitorization for systolic (SBP) and diastolic blood pressure (DBP), arterial blood oxygen saturation (SpODuring 20 min of preparation time (in which the preoperative forms were completed) for both groups;During MM for the test groupDuring surgery for both groupsand at the completion of the surgery.