Sedation is a set of actions aimed at achieving a patient be quiet, comfortable, free of pain and / or bad memories as a diagnostic or therapeutic procedure is performed . Given that regional anesthetic techniques frequently used in clinical practice are relatively traumatic and painful procedures , have partnered on multiple occasions sedation, to make such interventions more comfortable for the patient and make it easier to peer collaboration . Not all anesthesiologists use sedation or indicate similarly, but the vast majority practice it. Some apply it consistently before or after puncture for a regional block or in the event that required multiple punctures, and other used only when the patient is anxious .