The first was the RANSAY SCALE, which is a scale used to assess the depth of sedation , is validated over 30 years ago, is easy to use and has been the gold standard in many studies that evaluated sedation; as you increase the level on the scale, increasing the degree of sedation . Being awake patient can be found in a level 1, referring to an anxious and / or agitated patients in level 2, when partner is quiet and focused and have spontaneous eye opening, or a level 3 when has closed eyelids, but quickly responds to verbal stimuli. When the patient was found asleep, level 4 will be called if you are still with closed eyes and responds quickly to tactile and verbal stimuli strong, level 5 when it has a slower response and only responds to important and / or painful stimuli and level 6 when does not respond to any stimulus.