49 7 Alarms
fabian Therapy evolution | SW V5.1.x
Ref: 121003.EN / Date: 26Jan2021
7.1.1 Automatic alarm limits
7.1.1.1 Alarm conditions
Each displayed breath data is checked for violations of the current alarm limits.
Additionally, the measured pressure will be checked against the limit every 20
milliseconds with following conditions:
Upper alarm limit of pressure:
• A breath in the range of the upper limit will reset the delay of 5 seconds.
• nCPAP: with a delay of 3000 milliseconds in case of a manual or mechanic breath ->
pressure will be checked against upper limit, if the pressure is still above the limit
after 5 seconds the alarm will be signaled, otherwise it is cleared
Lower alarm limit of pressure:
• A breath in the range of the upper limit will reset the delay of 5 seconds.
• nCPAP: with a delay of 3000 milliseconds in case of a manual or mechanic breath ->
pressure will be checked against lower limit, if the pressure is still below the limit
after the alarm delay set by the user in the ventilation menu, the alarm will be
signaled, otherwise it is cleared
• DUOPAP: pressure will be checked against lower limit, if the pressure is still below
the limit after the alarm delay set by the user in the ventilation menu, the alarm will
be signaled, otherwise it is cleared
• If an alarm condition has been detected, a dedicated alarm array is written,
otherwise it is cleared.
7.1.1.2 Automatic alarm presets
The following alarm limits presets are used as defaults.
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