1. Contaminated area: Any area contaminated by pathogenic microorganisms or directly or indirectly contacted by patients is called a contaminated area, such as wards, toilets and bathrooms. Articles in the polluted area are not allowed to be taken out without disinfection.

2. Semi-polluted area: The area that may be polluted by pathogenic microorganisms is called semi-polluted area. Such as infirmary, treatment room, laboratory, inner corridor and discharge sanitary treatment room.

3. Clean area: Any area that is not polluted by pathogenic microorganisms is called clean area. Such as changing rooms, duty rooms, pantries and warehouses.

This is a relative concept. Hospital environment and small ward area are different. For example, in a hospital, the cleaning of general wards is divided as follows: clean area: blue; Potential pollution area: yellow; Contaminated area: red. Every hospital is different. Mainly the logo is eye-catching, and the staff knows the purpose and significance of zoning.

Extended data:

Requirements for isolation of contaminated areas: articles in contaminated areas shall not be taken to other places without disinfection; Workers must wear isolation gown, masks and hats when entering the polluted area, and change isolation shoes when necessary; Take off isolation gown, shoes and disinfect your hands before you leave. ?

Isolation requirements for semi-polluted areas: Patients or staff wearing isolation gown must not touch walls and furniture when passing through corridors; All kinds of test specimens have certain storage trays and shelves, and the tested specimens and containers should be treated separately in strict accordance with the requirements. ?

Isolation requirements of clean area: patients and articles contacted by patients are not allowed to enter the clean area; Before entering the clean area, the staff should wash their hands, take off isolation gown and isolation shoes.