A BIS monitor is a device to measure awareness of patient under general anesthesia. It consists of a computer, a signal converter and a sensor with three electric poles to detect an electroencephalogram(EEG). The computer processes an EEG and compute Bispectral Index(BIS). It varies from 0 to 100, where 0 means 'deep sleep' and 100 means 'awake'. The ideal value to performe a surgery is between 40 and 60. In this picture, it shows 97 and you can guess he pretends to sleep.
{{user:ignis/tag|BIS monitor by Aspect Medical Systems/BISモニタ|09/Feb./2006}} BIS monitor is a device to measure awareness of patient under general anesthesia. The Bispectral Index Score varies from 0 to 100, where 0 means 'deep sleep' and 100 means