Im not a anesthesiologist but Im doing a presentation on anesthesia and need some help determining how an anesthesiologist determines if a anesthetic is working - in particular an inhaled anesthetics for general anesthesia. (sevo and desflurane to be specific). Is it based on patient movement response to a stimulus, HR, Oxygen, MAC concentrations only ect?? I cant seem to find any info ( some sources say what vitals to monitor but not anything about the patient's response to anesthesia).  I ask this b.c Im doing a project on if Redheads require additional anesthesia and if so, how to monitor them/determine if they have reached the correct endpoint/if the anesthesia is working.  If anyone know this answer please email me at elisaredgreco@gmail.com.  Also if you have any references regarding how to determine an anesthesia effectiveness/endpoint please include
THANKS!