10-20 624074/07
10 Responding to alarms
Flow Sensor
calibration
needed
Low priority.
The ventilator does not have cor-
rect calibration data or automatic
recalibration of the flow sensor is
impossible. The flow trigger is
disabled, and the pressure trigger
is enabled.
Try calibrating the flow sen-
sor up to two times.
Replace the flow sensor.
Flow Sensor
calibrated
OK
Operator Message. The
Flow Sensor calibration was suc-
cessful.
No action required.
Heliox sup-
ply failed
Medium priority.
The air supply Pressure<1.9bar
(190kPa/28psi)or the input Flow<
40l/min.
Inspect Heliox supply.
Increase Heliox supply Pres-
sure. Consider changing
source
High fre-
quency
Medium priority.
The measured fTotal > the set
alarm limit.
Confirm the patient for
adequate ventilation (VTE).
Check the alarm limits.
If the ventilator is in ASV,
refer to Appendix C, ASV.
High HLI Medium priority.
Measured HLI> alarm limit.
Verify the hemodynamic
status of the patient and
adjust the alarm limits if
needed.
High leak Medium priority.
The percentage of delivered
inspiratory volume that is not
returned during exhalation > the
set the Leak alarm limit.
Check for leaks at patient
interface (on patient side of
flow sensor).
High min-
ute volume
High priority.
The measured ExpMinVol > the
set alarm limit.
Observe the patient.
Confirm and adjust the
ventilator settings, includ-
ing alarms.
Table 10-2. Alarms and other messages
Alarm Definition Complete these actions
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