174 Chapter 7: Alarms and Indicators Operator's manual
L2786 Rev. M
Note:
PEEP is not maintained during a LOSS, GAS SUPPLY alarm condition. When the ventilator safety valve is open the
ventilator graphics will indicate a safety state by displaying the color purple.
Loss of Heliox
This is a high priority audible/visual alarm. LOSS, HELIOX is displayed and a high priority tone sounds. The alarm is
triggered if Heliox is being used and the Heliox supply to the ventilator drops below 18.0 psig (1.2 bar). The patient
continues to be ventilated by the oxygen supply only.
Pressure Alarms
Low Peak Pressure
This is a high priority audible/visual alarm. LOW P
PEAK
is displayed and a high priority tone sounds, whenever the peak
inspiratory pressure for a given breath is less than the preset threshold for Low P
PEAK
.
Range: 3 to 99 cmH
2
O
Defaults: 8 cmH
2
O (Adult/Pediatric)
5 cmH
2
O (Neonate)
Limitations: Not active for spontaneous breaths.
High Peak Pressure
This is a high priority audible/visual alarm. HIGH P
PEAK
is displayed and a high priority tone sounds whenever the preset
High P
PEAK
threshold is exceeded. Inspiration is terminated and circuit pressure is allowed to return to the current set
baseline pressure + 5 cmH
2
O. Circuit pressure must return to baseline +5 cmH
2
O before the next breath can be
delivered.
• Normal High P
PEAK
Alarm
Alarms if the inspiratory pressure in the patient circuit exceeds the set High P
PEAK
alarm threshold during the
inspiratory phase of a breath, except during sigh breath cycles.
Range: 10 to 105 cmH
2
O (Adult/Pediatric)
10 to 85 cmH
2
O (Neonate)
Defaults: 40 cmH
2
O (Adult/Pediatric)
30 cmH
2
O (Neonate)
Not active for Sigh Breaths
• Sigh High P
PEAK
Alarm
Alarms if the inspiratory pressure in the patient circuit exceeds the Sigh High P
PEAK
alarm threshold during a
sigh breath cycle.
Range: 1.5 x (Normal High P
PEAK
), up to a maximum of 105 cmH
2
O
Active only for Sigh Breaths.
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