11-3
11.5 Changing SpO
2
Settings
11.5.1 Adjusting the Desat Alarm Limit
The desat alarm is a high level alarm notifying you of potentially life threatening drops in
oxygen saturation. To adjust the desat alarm limit, select [
Desat Limit
] in the [
SpO
2
Setup
]
menu and then adjust the limit. When the SpO
2
value is below the desat alarm limit, the
message [
SpO
2
Desat
] is displayed.
11.5.2 Setting SpO
2
Sensitivity
For Masimo SpO
2
module, you can set [
Sensitivity
] to [
Normal
] or [
Maximum
] in the
[
SpO
2
Setup
] menu. When the [
Sensitivity
] is set to [
Maximum
], the patient monitor is
more sensitive to minor signals. When monitoring critically ill patients whose pulsations are
very weak, it is strongly recommended that the sensitivity is set to [
Maximum
]. When
monitoring neonatal or non-critically ill patients who tends to move a lot, noise or invalid
signals may be caused. In this case, it is recommended that the sensitivity is set to [
Normal
]
so that the interference caused by movement can be filtered and therefore the measurement
stability can be ensured.
11.5.3 Changing Averaging Time
The SpO
2
value displayed on the monitor screen is the average of data collected within a
specific time. The shorter the averaging time is, the quicker the patient monitor responds to
changes in the patient’s oxygen saturation level. Contrarily, the longer the averaging time is,
the slower the patient monitor responds to changes in the patient’s oxygen saturation level,
but the measurement accuracy will be better. When monitoring critically ill patients, selecting
shorter averaging time will help understanding the patient’s state.
To set the averaging time:
For Mindray SpO
2
module, select [
Sensitivity
] in the [
SpO
2
Setup
] menu and then
toggle between [
High
], [
Med
] and [
Low
], which respectively correspond to 7 s, 9 s and
11 s.
For Masimo SpO
2
module, select [
Averaging
] in the [
SpO
2
Setup
] menu and then
toggle between [
2-4 s
], [
4-6 s
], [
8 s
], [
10 s
], [
12 s
], [
14 s
] and [
16 s
].
For Nellcor SpO
2
module, select [
Averaging
] in the [
SpO
2
Setup
] menu and then
toggle between [
8 s
] and [
16 s
].
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