The difference between Class I, Class II, and Class III medical devices, preferably with authoritative explanatory URLs. (e.g. Medical Device Supervision and Administration Regulations)

/WS01/CL0001/ This is the state food and drug supervision network, you can go there to find what you need to know everything about drugs, medical devices, difficult. Class I, Class II and Class III terminology management category, see medical device supervision and management regulations have relevant provisions. Management from low to high. Medical device, refers to the use of the human body alone or in combination with instruments, equipment, appliances, materials or other items, including the required software; its use on the human body surface and in vivo is not obtained by means of pharmacology, immunology or metabolism, but there may be a participation of these means and play a certain role in assisting; and its use is intended to achieve the following intended purposes: (a) the prevention, diagnosis, treatment of disease, (a) the prevention, diagnosis, treatment, monitoring, and alleviation of disease; (b) the diagnosis, treatment, monitoring, alleviation, and compensation of injury or disability; (c) the study, substitution, and regulation of anatomical or physiological processes; and (d) the control of pregnancy. Medical devices are categorized into three types: Class I refers to medical devices whose safety and effectiveness are adequately ensured through routine management. The second category refers to the safety and effectiveness of medical devices should be controlled. The third category refers to, implanted in the human body; used to support, maintain life; potentially dangerous to the human body, its safety, effectiveness must be strictly controlled medical devices.