5-1
5
Alarms
Alarms, triggered by a vital sign that appears abnormal or by technical problems of the
pulse oximeter, are presented to the user by visual and audible alarm indications.
5.1 Alarm Categories
By nature, the pulse oximeter’s alarms can be classified into three categories:
physiological alarms, technical alarms and prompt messages.
1. Physiological
alarms
Physiological alarms, also called patient status alarms, are triggered by a monitored
parameter value that violates set alarm limits or an abnormal patient condition.
Physiological alarm messages are displayed in the physiological alarm area.
2. Technical
alarms
Technical alarms, also called system status alarms, are triggered by a device
malfunction or a patient data distortion due to improper operation or system
problems. Technical alarm messages are displayed in the technical alarm area.
3. Prompt
messages
As a matter of fact, prompt messages are not alarm messages. Apart from the
physiological and technical alarm messages, the pulse oximeter will show some
messages telling the system status. Prompt messages are displayed in the technical
alarm area.
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