Csi Scale - Danmeter CSM 2 User Manual

CSI Scale

5.3
The CSI is a unit-less scale from 0 to 100, where 0 indicates a flat EEG and 100 indicates EEG
activity corresponding to the awake state. The range of adequate anesthesia is designed to be
between 40 and 60. All values in the table are approximate values based on the mean values of the
patient behaviour.
The relationship among the CSI, the clinical state and the OAAS
CSI Clinical State
90 – 100 Awake
80 – 90 Drowsy
60 – 80 Light anesthesia or sedation
Range considered as adequate for
40 – 60
surgical anesthesia
Deep anesthesia, in most cases
10 – 40
accompanied by burst suppression
Close to coma, BS (burst suppression)
0 – 10 larger than 75. When CSI is below 3,
the EEG is practically iso-electric.
The prediction probability (Pk) between the CSI and the OAAS was 0.92
The OAAS score correspond to:
OAAS Clinical State
5 Responds readily to name spoken in normal tone
4 Lethargic response to name spoken in normal tone
3 Responds only after name called loudly and/or repeatedly
2 Does not respond to mild prodding or shaking
1 Does not respond to noxious stimulus
Observers Assessment of Alertness and Sedation
1
Cerebral State Monitor - CSM DFU
score is shown in the table below
1
OAAS
5
4
3
2-1
1
<1
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