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24.3 Alarm Descriptions and Actions to be Taken
Alarm 1. Monitor Failure
Alarm message.................................... Monitor failure
Alarm sub message ............................ Remove ventilator from service
Priority of alarm................................... 1
Monitor mode....................................... N/A
Can alarm be muted ........................... No
Sounder Priority .................................. High
Alarm Description:
If the monitor system fails this alarm is generated by the controller system.
Action: Remove patient to alternative form of ventilation, then remove
ventilator from service.
Alarm 2. Sustained Sub-ambient Pressure
Alarm message.................................... Sustained sub ambient pressure
Alarm sub message ............................ Controller operation temporarily
disabled
Priority of alarm................................... 2
Monitor mode....................................... All
Can alarm be muted ........................... No
Sounder Priority .................................. High
Alarm Description:
If the proximal pressure falls below -2mbar for >50ms a sub-ambient alarm is generated
and a message will be sent to the control sub-system to shut off all gasses. If the gas is not
cut off during the next 50ms the monitor will intervene and cut all the gasses. Fresh gas
reinstated after 6 seconds ventilation restarted after a further 2 seconds.
In all HFO modes it is the mean pressure that is checked for sub-ambient level.
Action: Remove patient to alternative form of ventilation, then remove
ventilator from service.
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