What is an emergency medical service system?

Emergency medical service system refers to the process that even if medical measures are taken for acute, dangerous, serious and injured patients, they should be given first aid on the spot, and then safely escorted to the emergency room of the nearest hospital for further treatment. A few critically ill patients need immediate surgery and sent to intensive care unit or specialized ward for treatment. The system includes pre-hospital emergency center station, in-hospital emergency department and intensive care unit or specialized ward. They have independent responsibilities and tasks, and they are closely related. This is a well-organized unified emergency network.