Alarm System (Pulse Oximeter)
3. Alarm Limits
is exceeded. It is best that the operator be within a maximum of 1 meter from the unit.
Directions for alarm silence are indicated in the previous section. When a sensor is
When a sensor is not connected to its cable, the text “no SEn” will illuminate and 3 red
Oximeter has been set to alarm silence mode.
the section
Operation (Pulse Oximeter)
. The default value and range of the alarm limits
are as follows:
Check alarm limits each time the Pulse Oximeter is used to ensure that they
are appropriate for the patient being monitored.
Setting Default Value Range
SpO
2
Low Limit
2
The SpO
2
SpO
2
High Limit
2
The SpO
2
Pulse Rate Low
Limit (BPM)
100 bpm
The pulse rate low alarm limit can be set anywhere between 30
BPM and 199 BPM, with a 5 BPM step size.
Pulse Rate High
Limit (BPM
180 bpm
The pulse rate high alarm limit can be set anywhere between 35
BPM and 235 BPM, with a 5 BPM step size.
The low alarm limit must always be set below the high alarm limit.
Attempting to set the high alarm limit below the low alarm limit will not work.
In order to set the high alarm limit below the current low alarm limit, you
If there is a loss of mains power and the CPAP display is on, the Pulse
Oximeter alarm values will be saved. If the Pulse Oximeter display is turned
off using the power button or if there is a loss of mains power and the CPAP
display is off, the Pulse Oximeter alarm values will return to default values.
Alarm System (Pulse Oximeter)
CPAP therapy has a separate alarm system explained in the
Alarm System
(CPAP)
section.
The pulse oximeter alarm system will generate visual and audible alarm signals to
notify you of alarm conditions that the system detects.
1. Alarm Identication
Two levels of alarm priority are implemented: high and low priority. The following table
2. Alarm Indication
An alarm condition is indicated by:
Audible alarm tone
Sensor off and no sensor alarms will only generate an alarm condition after a pulse
has been found.
Alarm Priority Parameter Alarm Type
High
Low saturation (SpO
2
Audible and
visual
High saturation (SpO
2
Low pulse rate (pulse rate range 30-199 bpm)
High pulse rate (pulse rate range 35-235 bpm)
Sensor off and no sensor
System failure
Low Low perfusion index
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