In vitro diagnostic is a way that through extracting the samples including blood, body fluids and organization from body to inspect and diagnose, and it is relative to the in vivo diagnosis. In the process of inspecting needs corresponding instruments and reagents, and these instruments and reagents compose the In vitro diagnostic system. These enterprises that engaged in the r&d, production and marketing of these instruments and reagents formed in vitro diagnostic industry and the in vitro diagnostic industry brings together biology, medicine, electronics, machinery and other related technologies.
Environment includes both the atmosphere, water, soil, plants, animals, microorganisms and other material factors, and it also includes such as concept, regulation, the code of conduct and other non-material factors. It consists of both natural factors and social factors and it also includes both the inanimate forms and the life forms. Environment is relative to the case of a main object, the different main object, the different size and content of environment.