Philips Trilogy Evo Universal - Page 52

Instructions for Use | Alarms and System Messages
Alarms and System Messages 52
during active
alarm
LOW EXPIRATORY PRESSURE
Priority
Medium
Why it occurs
During the expiratory phase, the delivered pressure is 5 cmH
2
O or more below the target patient
pressure.
What to do
• Check the circuit for a leak or disconnect.
• Check the circuit for kinked, pinched, or blocked tubing.
Device
performance
during active
alarm
The alarm is automatically resolved when the delivered pressure comes within 5 cmH
2
O of the target
patient pressure during the expiratory phase.
Device will continue to operate.
LOW INSPIRATORY PRESSURE
Priority
Medium
Why it occurs
During the inspiratory phase, the delivered pressure is 5 cmH
2
O or more below the target patient
pressure.
What to do
• Check the patient for excessive inspiratory effort
• Check the ventilator for:
o Kinked, pinched, or blocked tubing
o Circuit leak or disconnect
Device
performance
during active
alarm
The alarm is automatically resolved when the delivered pressure comes within 5 cmH
2
O of the target
patient pressure during the inspiratory phase.
Device will continue to operate.
LOW OXYGEN INPUT PRESSURE
Priority
Medium
Why it occurs
The pressure at the O
2
inlet is too low to support the FiO
2
setting.
What to do
Check the O
2
source.
Requirements
Additional oxygen
Device
performance
during active
alarm
Device will continue to operate.
FiO
2
delivery may be inaccurate.
Algorithm
summary
The machine assigns a minimum pressure threshold for oxygen based on the flow setting to support
the FiO
2
set point. The following table illustrates the threshold based on flow. The alarm occurs when
the inlet pressure is less than or equal to 5psig or the Inlet Pressure value from the table for six
consecutive breaths.
Inlet Pressure [psig]
Maximum Flow [slpmd]
10
66.4
20
96.1
30
126.1
40
156.7
50
188.1
60
219.4
70
251.7
80
279.9