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Table 3 Observer’s Assessment of Alertness/Sedation scale

From: Relation between fentanyl dose and patient state index during spinal anesthesia for elective cesarean section

Score level

Responsiveness

5

Responds readily to name spoken in a normal tone

4

Lethargic response to name spoken in a normal tone

3

Responds only after name is called loudly and/or repeatedly, or lash reflex is present

2

Loss of lash reflex or has a positive response to train-of-four (TOF) stimulation

1

No purposeful response to TOF stimulation