Philips Avalon FM20, Instructions For Use Manual

Page: 153 / 221

18 Monitoring SpO2
153
Alarm Delays
There is a delay between a physiological event at the measurement site and the corresponding alarm at
the monitor. 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 is the combination of the configured alarm delay time plus the general
system alarm signal delay time.
Adjusting the SpO2 Alarm Limits
In the
Setup SpO ₂
menu:
• Select High Limit then choose the upper alarm limit.
• Select
Low Limit
then choose the lower alarm limit.
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 ₂ menu, select Desat Limit .
2
Adjust the limit.
Adjusting the Pulse Alarm Limits
See “Adjusting the Heart Rate / Pulse Alarm Limits” on page 160.
Setting Up Tone Modulation
If tone modulation is on, the QRS tone pitch lowers when the SpO
2
level drops. Remember, the QRS
tone is derived from either heart rate (from MECG) or pulse (from SpO
2
) depending on which is
currently displayed (see “Priority for Maternal Heart / Pulse Rate” on page 155).
NOTE
Pulse from Toco MP does not provide a QRS tone.
Setting the QRS Volume
In the
Setup SpO ₂
menu, select
QRS Volume
and set the appropriate QRS tone volume.