首先，什么叫做医疗器械?医疗器械是指直接或者间接用于人体的仪器、设备、器具、体外诊断试剂及校准物、材料以及其他类似或者相关的物品，包括所需要的计算机软件。而医疗器械经营许可证是三类医疗器械经营企业必须具备的证件。

国家对医疗器械按照风险程度实行分类管理。

第1类:

是风险程度低，实行常规管理可以保证其安全、有效的医疗器械。比如手术刀、手术剪、纱布绷带、医用冰袋、听诊器等。

第2类:

是具有中度风险，需要严格控制管理以保证其安全、有效的医疗器械。比如我们日常生活中常见的体温计、血压计、心电图仪、雾化器等。

the certificate that the third class medical device business enterprise must have. The state implements classified management of medical devices according to the risk degree. Category 1: It is a low degree of risk, and the implementation of routine management can ensure its safe and effective medical devices. Such as scalpel, surgical scissors, gauze bandages, medical ice packs, stethoscope, etc. Category 2: It is a medical device with moderate risk and needs strict control and management to ensure its safety and effectiveness. For example, in our daily life, the common thermometer, sphygmomanometer, electrocardiogram instrument, atomizer and so on.