An ER Procedure is a set of medical procedures used in emergency rooms. It includes Triage, which is the process of sorting patients according to the urgency of their condition; CPR, which stands for Cardiopulmonary Resuscitation and is used to revive a patient who has stopped breathing; PREP, which stands for Pre-Hospital Emergency Physician and is a physician who provides medical care in an emergency situation outside of a hospital; and CTSCAN, which stands for Computed Tomography Scan and is a type of imaging test used to diagnose medical conditions.