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.
Bispectral Index and BIS are trademarks of Aspect Medical Systems, Inc., and are registered in the USA, EU and other countries.
A self-portrait of the author, ignis himself
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{{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