11-1
11 Alarms
11.1 Introduction
Alarms, triggered by a vital sign that appears abnormal or by technical problems of the
anesthesia machine, are indicated to the user by visual and audible alarm indications.
NOTE
z When the anesthesia machine is started, the system detects whether alarm lamp
and audible alarm tones function normally. If yes, the equipment gives a beep and
the alarm lamp flashes yellow and red once in turn. If not, do not use the
equipment and contact us immediately.
z When multiple alarms of different levels occur simultaneously, the anesthesia
machine will select the alarm of the highest level and give visual and audible alarm
indications accordingly.
11.1.1 Alarm Categories
By nature, the anesthesia machine’s alarms fall 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 proper operation or mechanical 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 anesthesia machine will show some
messages telling the system status. Messages of this kind are included into the prompt
message category and usually displayed in the prompt message area.
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