7 Alarms 59
fabian +nCPAP evolution | SW V5.1.x
Ref: 122003.EN / Date : 26Jan2021
7.1.1 Automatic alarm limits
7.1.1.1 Alarm conditions
Each numerical parameter value is checked for violations of the current alarm limits.
Additionally, the measured pressure will be checked against the limit every 20 milliseconds with
the following conditions:
Upper Alarm Limit of Pressure:
• CPAP: with a delay of 300 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.
• nCPAP: with a delay of 3 seconds 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.
• All other ventilation modes: pressure will be checked against the upper limit, if the limit is
exceeded the alarm will be signaled.
• A breath with peak pressure below the upper limit will reset the delay of 5 seconds.
Lower Alarm Limit of Pressure:
• A breath with peak pressure above the lower limit will reset the delay set in the ventilation
menu.
• nCPAP: with a delay of 3 seconds 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 operator 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 operator 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 limit autosets are used as defaults.