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Supply Gas Pressure Alarm: An audible and visual Source Pressure
alarm will activate if the inlet pressure of one, or both, of the gas sources are
outside of the specified gas supply range. There is a 1 second delay for this
alarm. The alarm message will indicate the specific gas source that is out of
specification. If a single gas source goes out of range during operation, then
only the remaining gas source will be available (air or oxygen) and FiO
2
blending will become inoperable. The user will be able to select either 'Air
Only' or 'Oxygen Only' to allow the unit to operate in single-gas source mode
and mute the FiO
alarms while the problem is corrected. The system will
2
automatically return to normal operation (blending to the original FiO
2
setting) when the problem is corrected and the source pressures are
returned to within the specified range.
High Pressure Alarm: An audible and visual High Pressure alarm has dual
limits. The first limit will activate the alarm when the monitored pressure is
greater than or equal to 12 cmH
O for 2 seconds. The second limit will
2
activate the alarm immediately when the monitored pressure is greater than
or equal to 18 cmH
O. This alarm automatically activates the electronic
2
pressure relief solenoid and closes the patient delivery solenoid, which
instantly reduces the pressure in the patient circuit to zero. Approximately
every three (3) seconds, the system will reinstate flow. If the alarm condition
has cleared, the unit will operate normally. If the alarm condition still exists,
the 'High Pressure' alarm will cycle through the 3-second loop.
Elevated Pressure Alarm: An audible and visual Elevated Pressure alarm
is preset for a CPAP pressure that is 2 cmH
O above the Set CPAP level.
2
There is a 5 second delay for this alarm
Low Pressure Alarm: An audible and visual Low Pressure alarm is preset
for a CPAP pressure that is 2 cmH
O below the Set CPAP level. There is a
2
14 second delay for this alarm.
®
4
AirLife
nCPAP Operator's Manual
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