User Manual

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Alarm Limit for TACHY, BRADY
The arrhythmia detection level for tachycardia (TACHY) and bradycardia (BRADY) alarm links with
the upper and lower alarm limit for HR / PR.
The tachycardia (TACHY) alarm generates when the measurement exceeds the HR / PR upper
alarm limit. When the upper alarm limit is OFF, alarm will not generate.
The bradycardia (BRADY) alarm generates when the measurement is below the HR / PR lower
alarm limit. When the lower alarm limit is OFF, alarm will not generate.
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.
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 Integral 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)
｝×
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.
4
Alarm Setup