Covidien Nellcor - Figure 10-4. Second Spo 2 Event: no Satseconds Alarm; Second Spo Event

SatSeconds™ Alarm Management Feature
Operator’s Manual 87
10.6.2 Second SpO2 Event
Consider the second event. Suppose the SatSeconds alarm limit is still set to
25. The patient’s SpO
2 drops to 84% and the duration of the event is 15
seconds before saturation again exceeds the lower alarm threshold of 85%.
Because the SatSeconds alarm limit is set to 25 and the actual number of Sat-
Seconds equals 15, there is no audible alarm.
Figure10-4.Second SpO2 Event: No SatSeconds Alarm
1% drop below the lower alarm limit threshold
x15 second duration below the lower threshold
15 SatSeconds; no alarm