Emergency nursing involves providing immediate treatment to patients experiencing medical emergencies or injuries. Key principles of emergency nursing include establishing an airway, controlling hemorrhaging, monitoring circulation and neurological status, documenting findings, and starting cardiac monitoring. The scope of emergency nursing is to treat patients of all ages for a wide range of illnesses and injuries, from minor issues to heart attacks. General principles of emergency care involve early detection and response, on-scene care, transportation to definitive care facilities, and following triage and assessment approaches like ABCD, EFGHI, and AMPLE.