Assessing A Suspicious Spo2 Reading; Changing The Averaging Time; Understanding Spo2 Alarms - Philips IntelliVue CL SpO2 Instructions For Use Manual

3 Monitoring SpO2

Assessing a Suspicious SpO2 Reading

Traditionally, pulse rate from SpO
the SpO
2
the correct calculation of SpO
When pulse rate is very low, or strong arrhythmia is present, the SpO
heart rate calculated from ECG but this does not indicate an inaccurate SpO
If you doubt the measured SpO
patient monitor, the pleth wave and perfusion indicator on the monitor to assess the signal quality.
WARNING
With pulse oximetry, sensor movement, ambient light (especially strobe lights or flashing lights) or
electromagnetic interference can give unexpected intermittent readings when the sensor is not
attached. Especially bandage-type sensor designs are sensitive to minimal sensor movement that might
occur when the sensor is dangling.

Changing the Averaging Time

Depending on the monitor configuration, you may be able to change the averaging time for the SpO
values.
The averaging time represents the approximate time period used for the calculation. The exact
averaging time also depends on the signal conditions. The longer the averaging time, the longer the
time needed until the SpO
numerical values: SpO
averaging is useful for situations where an extremely fast measurement is required or few artifacts are
expected. Use slow averaging where you expect the number of artifacts to be relatively high.
1 In the
Select the required averaging time from the list.
2

Understanding SpO2 Alarms

If you are using the SpO
rate alarms (if configured) on the monitor.
There is a delay between a physiological event at the measurement site and the corresponding alarm at
the host system. This delay has two components:
• The general system delay time is 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 and the configured averaging time. The longer the averaging time
configured, the longer the time needed until the numerical values reflect the physiological event.
• The time between the displayed numerical values crossing an alarm limit and the alarm indication
on the monitor. This delay depends on the host system.
Refer to the Instructions for Use of the monitor for information about the SpO
36
2
reading. With newer algorithms, such as FAST-SpO
is not directly linked to the correct detection of each pulse.
2
, use the signal quality indicator (if available) or, when used with a
2
values reflect the physiological event. The same averaging is applied to all
2
, pulse rate and Perfusion Index (only available at the patient monitor). Fast
2
SpO₂ Average
menu, select
Pod with an assigned patient monitor, you will see SpO
2
was compared with heart rate from ECG to confirm the validity of
2
.
, this is no longer a valid criteria because
pulse rate may differ from the
2
value.
2
alarms and pulse
2
and pulse rate alarms.
2
2