26
Commonly-encountered Problems
Failure
description
Possible cause Recommended action
The alarm
[Paw Too High]
or [Pressure
Limiting]
occurs.
1 The breathing tubes are
occluded.
2 Patient airway is occluded.
3 Paw high alarm setting is
too low or Plimit setting is
too low.
4 Ventilation parameters are
changed.
5 The value measured by
the airway pressure sensor
is a bit high.
Any of the above reasons may
cause Paw to be higher than
Paw high alarm limi
t so that
the alarm [Paw Too High]
is triggered, or cause Paw
to exceed the Plimit setting
so that the alarm [Pressure
Limiting] is triggered.
1 Check if the breathing tubes
are pressed or bent. Check if the
fi lter connected to the Y-piece is
fi lled with patient secretions and
replace it if necessary.
2 Check if the patient tracheal
intubation is in good condition.
If necessary, clear excessive
patient secretions in the airway.
3 Increase Paw high alarm setting
or Plimit setting.
4 Re-set the ventilation
parameters.
5 Compare the Ppeak displayed
on the screen with the reading
on the airway pressure gauge. If
the Ppeak is signifi cantly different
from the maximum reading on
the airway pressure gauge, apply
manual ventilation and contact us
promptly.
The alarm
[Paw Too Low]
occurs.
1 The breathing tubes leak.
2 Paw low alarm limit is set
too high.
3 The breathing system is not
installed properly.
4 The value measured by the
pressure sensor is a bit low.
Any of the above reasons may
cause the Paw to be lower
than the Paw low alarm limit
for consecutive 20 seconds.
1 Check for tube leakage,
especially when the disposable
breathing tubes are used. Replace
them promptly in case of leakage.
2 Set Paw low alarm limit to a
lower value.
3 Check if the breathing system
is installed properly. If necessary,
reinstall it.
4 Compare the Ppeak displayed
on the screen with the reading
on the airway pressure gauge. If
the Ppeak is signifi cantly different
from the maximum reading on
the airway pressure gauge, apply
manual ventilation and contact us
promptly.
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