Alarms And Limits; Alarms And Informational Tones - Nonin Avant 4100 Operator's Manual

Alarms and Limits

Alarms and Limits
This chapter describes alarms and limits for the Avant 4000 Digital Pulse Oximetry
System.

Alarms and Informational Tones

The Avant 4000 display unit provides high and medium priority audible and visual
alarms, as well as informational tones.
High Priority Alarms
High priority alarms are those that require immediate attention to the patient. They
include SpO pulse rate, and low perfusion alarms. On the display unit, high priority
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alarms are indicated with rapidly blinking red LED displays when alarm limits are
met or exceeded. In addition, the pulse strength bargraph LED may illuminate a red
segment to indicate low perfusion.
High priority alarms are sounded as follows: "beep, beep, beep," (short pause),
"beep, beep" (10-second pause).
Medium Priority Alarms
Medium priority alarms are those that signal potential problems with the equipment
or other non-life-threatening situations. On the display unit, medium priority alarms
are indicated with slowly blinking amber displays.
Medium priority alarms are illuminated amber on the Main Alarm LED and on the
appropriate indicator(s) or numeric displays, sometimes displaying an error code to
help the user identify the source of the error.
Medium priority alarms are sounded as follows: "beep, beep, beep," (25-second
pause), "beep, beep, beep."
Informational Tones
Informational tones communicate important information. They are typically single
"beeps" or a series of three "beeps." Informational tones include the startup/
initialization tone and the pulse rate tone (which changes in pitch with SpO values).
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