Triage: The sorting out and classification of patients or casualties to determine priority of need and proper place of treatment.Emergency Service, Hospital: Hospital department responsible for the administration and provision of immediate medical or surgical care to the emergency patient.Emergency Nursing: The specialty or practice of nursing in the care of patients admitted to the emergency department.Mass Casualty Incidents: Events that overwhelm the resources of local HOSPITALS and health care providers. They are likely to impose a sustained demand for HEALTH SERVICES rather than the short, intense peak customary with smaller scale disasters.Emergency Medical Services: Services specifically designed, staffed, and equipped for the emergency care of patients.Nursing Audit: A detailed review and evaluation of selected clinical records by qualified professional personnel for evaluating quality of nursing care.After-Hours Care: Medical care provided after the regular practice schedule of the physicians. Usually it is designed to deliver 24-hour-a-day and 365-day-a-year patient care coverage for emergencies, triage, pediatric care, or hospice care.Pacific States: The geographic designation for states bordering on or located in the Pacific Ocean. The states so designated are Alaska, California, Hawaii, Oregon, and Washington. (U.S. Geologic Survey telephone communication)Emergency Medical Service Communication Systems: The use of communication systems, such as telecommunication, to transmit emergency information to appropriate providers of health services.Vital Signs: The signs of life that may be monitored or measured, namely pulse rate, respiratory rate, body temperature, and blood pressure.