Product Manual

Patient Monitor User Manual Monitoring SpO
2
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11.6 SpO
2
Alarm Delay
There is a delay between a physiological event at the measurement site and the corresponding
alarm at the monitor. This delay has two components:
1. The time between the occurrence of the physiological event and when this event is
represented by the displayed numerical values. This delay depends on the algorithmic
processing time and the sensitivity setting. The lower the sensitivity configured, the longer
the time needed until the numerical values reflect the physiological event.
2. The time between the displayed numerical values exceeding an alarm limit and the alarm
indication on the monitor. This delay is the combination of the configured alarm delay time
plus the general system delay time.
11.7 Perfusion Index (PI)*
PI is a numeric value indicating perfusion level. It reflects the perfusion level at the monitoring site.
As the measurement of SpO
2
is based on the pulsation caused by the blood flow through the
vessel, PI is in relation to the strength of the pulse. Also, you can use PI as a signal quality
indicator for the measurement of SpO
2
.
PI is indicated by a value ranging from 0 to 10. The bigger the value is, the better the perfusion
and the signal quality will be. The perfusion level and the signal quality are at their maximum
when the value reaches 10. When PI is below 2, it indicates the low perfusion and the poor signal
quality at the monitoring site; you need to reposition the sensor or find a better site.
The PI value will be displayed in the SpO
2
parameter area.
11.8 Measuring SpO
2
and NIBP Simultaneously
While measuring SpO
2
and NIBP on the same limb simultaneously, the user can set NIBP Simul
to On in SpO
2
Setup menu to lock the SpO
2
alarm status until the NIBP measurement ends. The
alarm occurred before entering NIBP Simul will not disappear. If NIBP Simul is set to Off, low
perfusion caused by NIBP measurement may lead to inaccurate SpO
2
readings and therefore
cause false physiological alarms.
11.9 Setting Pitch Tone
If tone modulation is on, the PR sound lowers when the SpO
2
level drops. In the SpO
2
Setup
menu, select pitch tone to toggle between On and Off.
11.10 Setting Sensitivity
The different sensitivity indicates different refresh frequency. High indicates the refresh
frequency of SpO
2
value is the most frequent. To change the sensitivity, please follow the steps:
1 Select the SpO
2
Setup menu;
2 Select Sensitivity on the interface and select the desired sensitivity from the popup list.