Cerebral State Monitor - CSM DFU Page 33 Skin Preparation and Sensor PositioningTo ensure low sensor impedance, clean skin with mild soap and water is recommended as a skincleanser.The CSM Procedure Pack contains a skin preparation product and 3 neuro sensors.Dry-abrade the skin gently using the skin prep product or with a dry wash cloth or gauze, to removethe non-conductive skin layer. See diagram below.Position of the three sensors from your CSM Procedure Pack according the diagram belowShown above is a left sided setup; right sided is also acceptable. Place sensors at the side farthestfrom the surgical area.The advanced signal processing of the monitor ensures that a deviation in the positioning of thesensors up to 2 cm (0.78 in) has no significant influence on the index. However, it is recommendedto place the sensors on an area of the skull where only a few muscle fibers are present in order toachieve the best quality signal.Middle of foreheadLeft side of foreheadMastoid left sideNote: Alcohol is not recommended as a skin cleanser; it leaves a film layer that may causehigh sensor impedance. If alcohol is used, ensure 30 second dry time.Caution:-Make sure no part of the sensors is in contact with any other conductive parts includingearth/ground.-If skin rash or other unusual symptoms develop, remove sensors from patient.-Change sensors every 24 hours to check skin integrity.Note: Once the sensors have been secured on the skin, attach the color-coded wires on thepatient cable to appropriate sensor.Note: The performance of the CSM is only guaranteed by the manufacturer when the CSMProcedure Pack is used.