S10/S12/S10A/S12A Patient Monitor User’s Manual
10-7
the active alarm source;
PR is stored in the monitor’s database and reviewed in the graphic/tabular
trends; in trend graphs, as the PR curve is in the same color with that of the
PR source, it is unlikely to distinguish the PR source.
To set which pulse rate as PR source, follow this procedure:
1. Select the SpO2 parameter area or waveform area to enter the【SpO2】menu.
2. Select【PR
Setup】submenu.
3. Select【PRSource】,and select a suitable PR source in the drop-down list.
The drop-down list of 【PR
Source】displays the currently valid PR source from top
to bottom according to the priority level. When you select【Auto】, the system will
automatically select the first option in the list as the PR source. If the PR source you set
does not exist, the system will automatically switch【PRSource】to【Auto】. When you
select 【IBP】, the system will automatically use the first pressure label in the list as the
PR source.
10.7. SpO2 Measurement Limitations
If you doubt the SpO2 measurements, check the patient’s vital signs first, then check
the monitor and SpO2 sensor. The following factors may influence the accuracy of
measurements:
There is excessive illumination from light sources such as a surgical lamp, a
brilirubin lamp, or sunlight;
Excessive patient movement;
Diagnostic test;
Low perfusion;
Electromagnetic interference, such as MRI device;
Electrosurgical equipment;
Concentration of nonfunctional hemoglobin, such as carbonyl hemoglobin
(COHb) and methemoglobin(MetHb);
The presence of certain dyes, such as methylene blue or indigo carmine;
Improper placement or incorrect use of pulse oximeter probe;
Shock, anemia, hypothermia or use of vasoconstrictor drugs, which can cause
blood flow in the arteries to drop to unmeasurable levels.
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