23 Event Surveillance
If You Set Use-defined Deviation Triggers
You can define event triggers that are independent of specific limits and based instead on deviations
from the current values. You must set a deviation and a period of time in which the deviation occurs.
There are three types of deviation available:
positive direction are detected and
detected. The deviation can be defined either in relative terms as a percentage, for example 10%, or as
an absolute value, such as 10 bpm.
If a condition that triggered an event persists and the values remain beyond the trigger threshold, a
new event will not be triggered.
For a new event to be triggered by the same condition, the measured values for at least one of the
triggers must cross back into the normal range and then recross the trigger threshold.
(Advanced Event Surveillance Only). You can be notified when an event is detected. For each event
group you can define a type of notification depending on the severity of the event conditions. The
notification can be a status message with a prompt tone or a standard *, **, or *** alarm notification.
These event alarms are handled exactly like measurement alarms; they can be silenced and are also
suspended when all alarms are suspended. You should only use alarm notification for events which are
comparable in severity to standard measurement alarms to avoid potential confusion due to too many
alarms. Notification in the form of an alarm is not available when the trigger condition is
Setting the type of notification, or switching notification off, is done in Configuration Mode.
Setting Triggers for NER and Basic Event Surveillance
Measurements used as event triggers
Select the name of the current episode type to set the episode pre/post time.
switches event notification off.
where only changes in a negative direction are
where only changes in a
At Least One
to enter the