Rad-97
Chapter 9: Alarms and Messages
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seconds. In the example below, Audio Pause is activated, and there are 15 seconds left until
Audio Pause is inactive again (alarms audible again).
To configure Audio Pause, see
Sounds
on page 85.
Note:
When Audio Pause is activated, powering off and then powering on Rad-97 will return
Audio Pause to its default inactive state.
Adaptive Threshold Alarm (ATA) Feature
ATA is currently not available in the U.S.A. and territories relying on FDA market
clearance.
Adaptive Threshold Alarm (ATA) is a user-selectable feature that is intended to provide
adaptive alarm thresholds in order to reduce occurrences of unnecessary audible alarms while
providing continuous SpO
2
surveillance.
ATA operates by utilizing alarm thresholds referenced to the patient-specific baseline value
of the SpO
2
parameter. The alarm thresholds are intended to supplement the standard SpO
2
low alarm limit and the Rapid Desat low alarm limit.
SpO
2
values that fall below the Rapid Desat low alarm limit, whether occurring rapidly or not,
will activate an audible alarm. When ATA is enabled, the Rapid Desat low alarm limit is
always active; SpO
2
values that fall below the standard low alarm limit but remain above the
ATA low alarm threshold activates visual alarms and a temporary audible notification. If the
ATA low alarm threshold is crossed, audible and visual alarms activate. In the event that the
patient-specific baseline value trends continuously lower, the ATA low alarm threshold is
limited by the Rapid Desat low alarm limit.
Prior to enabling ATA, review and select the appropriate standard low and Rapid Desat alarm
limits.
Once enabled, ATA has the following automatic safety features:
Reminder Tones
If a patient's SpO
2
value drops below the standard low alarm limit set by the user,
a visual alert will display and a reminder tone will repeat every 15 minutes as long
as the condition persists. If the SpO
2
value drops below the ATA low alarm limit, an
audible alarm will activate.
Rapid Desat Alarm Protection
The Rapid Desat feature is always active when ATA is enabled. This means that
deep desaturations (5% or 10%) from the standard SpO
2
low alarm limit generate
audible and visual alarms. When used with ATA, Rapid Desat also serves as
absolute low alarm limit protection. SpO
2
values exceeding the Rapid Desat low
alarm limit, whether rapid or not, will activate audible and visual alarms. The user
can select a Rapid Desat default of 5% or 10% desaturation.
