User's Manual

Table Of Contents
8 Monitoring SpO2
169
Adjusting the Alarm Limits
In the Setup SpO menu:
•Select
High Limit then choose the high alarm limit.
•Select
Low Limit then choose the low alarm limit.
WARNING
High oxygen levels may predispose a premature infant to retrolental fibroplasia. If this is a
consideration do NOT set the high alarm limit to 100%, which is equivalent to switching the alarm off.
Adjusting the Desat Limit Alarm
The Desat alarm is a high priority (red) alarm notifying you of potentially life threatening drops in
oxygen saturation.
1 In the Setup SpO menu, select Desat Limit.
2 Adjust the limit.
Pleth Wave
The Pleth wave is autoscaled to maximum display size. It decreases only when the signal quality
becomes marginal. It is NOT directly proportional to the pulse volume. If you need an indication of
change in pulse volume, use the perfusion indicator.
1 Minimum size for reliable SpO
2
value
Perfusion Numeric
The perfusion numeric (Perf) gives a value for the pulsatile portion of the measured signal caused by
the pulsating arterial blood flow.
As pulse oximetry is based on the pulsatile nature of the signal, you can also use the perfusion numeric
as a quality indicator for the SpO
2
measurement. Above 1 is optimal, between 0.3-1 is acceptable.
Below 0.3 is marginal; reposition the sensor or find a better site.
Perfusion Change Indicator
The perfusion change indicator is a graphic symbol which shows the change in the perfusion value,
relative to a reference value which you can set.
To set the current perfusion value as the reference value:
•In the
Setup SpO menu, select Set Perf Ref..