The alarm information here applies to all measurements. Measurement‐specific alarm
information is discussed in the sections on individual measurements. The monitor provides
patient alarms and INOP alarms.
Patient alarms will illuminate a red or yellow alarm light, where a red alarm light indicates a high
priority alarm to alert you to potentially life threatening situations for your patient (for example,
a disconnected catheter). A yellow alarm light indicates a lower priority patient alarm (for
example, a respiration alarm limit violation).
Patient alarms may also generate flashing numeric values or other indications, alarm flags and
sound an audible alarm (provided that a higher priority alarm sound does not override it).
For example, if a patient's heart rate climbs to 71 BPM (which is above the setting of the upper
alarm limit) a physiological alarm condition is declared.
INOPs are status and technical alarms—they indicate that the monitor cannot measure or detect
alarm conditions reliably; see page 4‐31 for a listing. Depending upon the nature of the condition
detected, INOPs will illuminate the alarm light, generate an alarm flag, and sound an audible
indicator tone (provided that a higher priority alarm sound does not override it). Other status
and technical alarms have a medium or high priority depending upon the nature of the condition
Patient alarms are mutually exclusive and the highest priority alarm will be indicated by the alarm
light; if a high priority alarm and a medium priority alarm are present simultaneously. the red
alarm light will be on, but the yellow alarm light will not be.
Expression MR400 Instructions for Use Alarms 4‐1
Medium priority alarm example (ECG heart rate value)
Violated (high) alarm limit setting