Certified Registered Nurse Anesthetists (CRNAs) provide anesthesia care in hospital settings, specializing in various surgical areas such as endoscopy, obstetrics, gynecology, general surgery, and orthopedics. They manage anesthesia administration and limited acute pain management, often working shifts with on-call hours. Required credentials include an active state nursing license, DEA registration, and certification, with experience using electronic medical records like MedAxion.