20 Event Surveillance The Events Database
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To start a CAR period:
1 Select the Start CAR pop-up key or SmartKey.
2 Select the required time period for the assessment.
3 Select Confirm to start the CAR.
If the NER group was not active it will be activated automatically.
During the CAR period an SpO
2
histogram is also generated with 1 second samples. For general
information about the presentation of data in a histogram, see “Viewing Histogram Trends” on
page 210. The CAR SpO
2
histogram is unique: it can only be accessed from the events function. It is
generated from the beginning of the CAR period (contrary to the non-SpO
2
histograms which are
generated from trended data retrospectively at the end of a time period). Settings are fixed for this
histogram and cannot be changed when viewing it.
The Events Database
The maximum number of events that can be stored in the event database depends on the database
configuration. The event database is set up in the monitor’s Configuration Mode. Events are stored in
the monitor’s event database for the configured lifetime, either 8 hours or 24 hours. Deleted events
cannot be retrieved. Events are automatically deleted when:
• their configured lifetime is over
• the storage capacity of the database is exceeded (storing a further event deletes the oldest event in the
memory)
• a patient is discharged.
As the event database is cleared when you discharge a patient, you should ensure that you have
documented any events you require for the patient records before you confirm the discharge.
Viewing Events
• To review all the events, use the Event Review window.
• To review individual event episodes in detail, use the Event Episode window.
Event Counter
Apnea events (A), bradycardia events (B), and combinations of these events are counted and classified
by the event counter in the Event Summary. If they are associated with a Desaturation (D), this is also
marked. Manual events (M) are counted separately. In the example below, A(D):2(1) indicates that
two apnea events occurred and one of them was associated with a desaturation.
To start viewing events, either:
♦ in the Main Setup menu, select Event Surveill. and then select the event view you
require from the list, or
♦ select the Event Surveill. SmartKey and then select the event view you
require from the list.
16 Stored Events: A(D):2(1) B(D):7(1) AB (D): 1(1) D:6 M:0
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