Anesthesia
Patients were routinely monitored by an electrocardiogram (ECG), heart rate (HR), invasive arterial pressure (IBP), pulse oxygen saturation (SpOThe BIS ranges from 100 (awake) to 0 (flat line EEG), and as the number decreases, the anesthetic depth increases. During general anesthesia, a BIS value of 40 to 60 was recommended [