SECTION 3
SERHT50NA A0808 3-17
High Baseline Pressure Alarm
(automatic)
Audible Alarm: Intermittent beep
Visual Alarm: ▲Paw indicator blinks red
Message Window: HIGH Pbase
The High Baseline Pressure (High P
base) alarm is activated
when airway pressure is above the Low ▼
Paw alarm limit setting
at the beginning of a time activated mandatory breath. The alarm
resets when Paw drops to within 5 cmH
2
O / mbar of the set
PEEP/CPAP level.
Occlusion Alarm, Circuit
(automatic)
Audible Alarm: Intermittent beep
Visual Alarm: ▲Paw indicator blinks red at the high
pr
iority rate
Message Window: OCCLUSION
An Occlusion alarm is activated when airwa
y pressure is above
the set PEEP + 15 cmH
2
O/mbar at 3 seconds after the beginning
of expiration, or at the end of expiration, whichever comes first.
When a breathing circuit occlusion occurs, the ventilator will be
unable to release the pressure, therefore additional breaths will
not be delivered until the condition is corrected. The alarm resets
when airway pressure falls to within 15 cmH
2
O/mbar of baseline,
at which point breath delivery is resumed.
Occlusion Alarm, Device
(automatic)
Audible Alarm: Intermittent beep
Visual Alarm: ▲Pa
w indicator blinks red at the high priority
rate and Device Alert indicator blinks
Message Window: OCCLUSION
An Occlusion alar
m is activated when airway pressure is above
the set PEEP + 15 cmH
2
O/mbar at 3 seconds after the beginning
of expiration, or at the end of expiration, whichever comes first.
When the Occlusion alarm is caused by a malfunction inside the
ventilator, the HT50 will attempt to relieve circuit pressure through
its redundant safety system. If successful, ventilation will continue,
but in an alarmed state. It is possible that the condition causing
the alarm will self-correct, in which case the alarm is reset.
Otherwise, the ventilator will continue to alarm until the necessary
service is performed. If the HT50 is unsuccessful in relieving
circuit pressure, additional breaths will not be delivered unless
airway pressure falls to within 15 cmH
2
O/mbar of baseline.
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