1, functional alarm, refers to the device itself malfunction or abnormal conditions resulting in alarm messages, such as low battery, memory failure.
2. Technical alarms refer to alarm messages caused by operational errors of device users, such as incorrect use of reagents and incorrect order of use.
3, vital signs alarm, refers to the device to monitor the patient's vital signs of the alarm information is abnormal, such as oxygen saturation drop, cardiac arrest.
4, class II medical device means that the safety and effectiveness of medical devices should be controlled. x-ray film machine, ultrasound, microscope, biochemistry instrument belongs to the second class of medical devices.