CRNAs are responsible for patient safety before, during and after surgery. Nurse anesthetists administer every type of anesthesia to all types of patients in any healthcare setting. CRNAs provide continuous pain relief and sustain patients’ critical life functions throughout surgical, obstetrical and other medical procedures. In addition to anesthetic agents, CRNAs select and administer adjunct drugs to preserve life functions. These advanced practice registered nurses also use technologically advanced monitoring equipment and interpret a vast array of diagnostic information throughout the course of the anesthetic process.