6
-
39
SpO
2
SEC Alarm Setup
When the SpO
2
value is unstable around the lower alarm limit, the frequently generated alarm may be
bothersome. The SEC alarm function controls these frequent alarms.
This function generates the alarm only when the integral value (the accumulation of difference
between the alarm limit and SpO
2
value at every second) reaches the preprogrammed SEC alarm
threshold value.
The integral value of the SEC alarm is calculated as follows.
0
10
20
30
40
50
60
70
80
90
100
1
5
9 13 17 21 25 29 33 37 41 45 49 53 57 61
[SEC]
SEC
Alarm I
n
tegral Value [
%
Integral Value
Alarm Generation
SpO2 Value
Alarm Limit
On this graph, the SEC alarm threshold value is set as 100.
The SpO
2
value begins to fall below the alarm limit at approximately 10 seconds. At the same time, the
integral value begins to increase.
(Alarm limit) – (SpO
2
value) is accumulated each second.
At around 25 seconds, the integral value reaches 100 and the alarm is generated.
At approximately 36 seconds, the SpO
2
value returns to the level within the alarm limit, and at the
same time, the integral value begins to decrease.
{
(Alarm limit) – (SpO
2
value)
}
x 2 is subtracted each
second.
Also, there is a safety net when setting the SEC alarm function. This safety net is for the case when
the SpO
2
value frequently falls below the alarm limit but does not last long enough to reach the SEC
alarm threshold.
If the SpO
2
value falls below the limit 3 times or more during the last 60 seconds, an alarm will be
generated even if the SEC alarm threshold is not reached.
1
Select the SEC alarm value according to the alarm frequency.
If 10 / 25 / 50 / 100 is selected, a circular SEC
alarm indicator will be displayed inside the numeric data box.
As the integral value increases, the indicator will begin to fill,
and when it is completely filled, an alarm will be generated.
If OFF is selected, this SEC alarm indicator will not be
displayed.
C A U T I O N
z
Whether to use the SEC alarm function and its threshold selection should
be based on the patient’s clinical indication portent and medical evaluation.
z
If the SpO
2
alarm and SEC alarm setup is set to OFF, the SEC alarm
integral value will be set to 0.
Indicator
6
SpO
2
Summary of Contents for DynaScope 7000 Series
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