What is the monitor, which belongs to the class of medical equipment

Monitor is divided into many kinds, there are cardiac monitoring, blood oxygen monitoring, dynamic monitoring, anesthesia monitoring, electroencephalography monitoring, etc., but also divided into invasive and non-invasive, it is used for human vital signs of the monitoring system, generally belongs to the second class of medical devices, invasive belongs to the third class. Medical device classification drug wisdom online there, or more detailed.