The Registered Nurse First Assistant (RNFA) is a perioperative registered nurse who works in collaboration with the surgeon and other health care team members to achieve optimal patient outcomes. The RNFA demonstrates the necessary knowledge, judgement, and skills specific to the expanded role of RNFA practice. These behavior practices include certain delegated medical functions that can be assumed by the RNFA. RNFA behaviors vary depending on patient populations, practice environments, service provided, accessibility of human and fiscal resources, institutional policy, and state nursing regulations.