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Appendix C Alarms
C.1 High priority alarms
Alarms content
Possible reasons
Solutions
Apnea
Exceed the pre-set value or the
alarm limit. The interval time
between the two continuous
inspiring tries is above the preset
limit value.
Check the patient and the
breathing system.
Check the settings of the
ventilation.
Airway pressure high
Note:
If the airway pressure exceeds
the pre-set up-limits pressure,
the expiring valve opens.
The airway pressure exceeds
the preset upper limits pressure.
The pipeline is twisted or
blocked.
Mucus or secretions blocks the
airway pipeline or endotracheal.
Patient ‘s coughing or breathing
rhythm is incompatible with the
ventilator. alarm settings are
Improper. Breath bacteria filter is
blocked
Check the patient and the
breathing system.
Check the settings of the
ventilation and the alarm limits.
Airway pressure low
The airway peek pressure is
below the pre-set lower limit
pressure.
The tidal volume is set too low.
The pipeline is falling off.
Serious gas leakage.
Improper alarm settings.
Check the patient and the
breathing system.
Check the settings of the
ventilation and the alarm limits.
High Continues Pressure
The airway pressure is
continuous above
（
PEEP+15
）
cmH2O for 15(±3)seconds.
Check the patient and the
breathing system. Check the
settings of the ventilation. If
issues still exist,contact the
maintenance technician.
O
2
supply pressure low
The opxygen supplying pressure
is below 0.28Mpa.
The oxygen supplying pipiline is
cut off.
Check the oxygen supply
pipeline, If issues still exist,
contact the maintenance
technician.
Air supply pressure low
The air supply pressure is lower
than 0.28MPa.
The air supply tube is cut off.
Check and connect the air supply
pipeline. If issues still exist,
contact the maintenance
technicians.
The pipeline is falling off
The probe of the Patient’s gas Remove the water from the
