Summary

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.

See also en:Bispectral index.

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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