How Sedated is my Patient?

A good tool to determine level of Sedation is the RASS score-
This is the Richmond Agitation-Sedation Scale which helps determine the level of sedation versus Agitation.

Basically, the RASS scale is:
+4    Combative          combative, violent, immediate danger to staff
+3    Very Agitated     pulls or removes tubes/catheters, aggressive
+2    Agitated             frequent nonpurposeful movement, fights vent
+1    Restless             anxious or apprehensive
0      Alert and calm   
-1    Drowsy              sustained awakening to voice (>10 sec)
-2    Light sedation     briefly awakens to voice (<10 sec)
-3    Mod. sedation    movement or eye opening to voice
-4    Deep sedation    movement/eye opening only to phsyical stim.
-5    Unarousable       no response to voice or physical stim

from Sessler, et al.  Am J Resp Crit Care Med 2002, 166: 1338-1344