Class a devices are

High-risk devices in medical devices are medical devices that may pose a potential danger to the human body. According to the query "Regulations on Supervision and Administration of Medical Devices", Class A devices include implants, extracorporeal circulation devices, ventilators, cardiopulmonary resuscitation devices, anesthesia machines, cardiac pacemakers, neurosurgical instruments and other medical devices that may pose potential danger to the human body. These devices need to go through strict registration, approval, testing and regulatory procedures to ensure their safety and effectiveness and to prevent adverse effects on patients.Class A devices need to be used in strict accordance with the doctor's instructions and the instructions for use, as well as regular testing and maintenance, to ensure the normal operation and safe use of the equipment.