If a patient's safety will depend on the device's internal power supply, the device must have a way to show the state of that supply. If it will depend on an external power supply, the device must have an alarm that signals a power failure. A device meant to monitor one or more clinical parameters must have a suitable alarm system to warn the user of a situation that could lead to the patient's death or severe deterioration.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.