Alarm Conditions And Alarm Signals - ARCHEON EOlife Instructions D'utilisation

c) Alarm conditions and alarm signals
Alarm messages related to ventilation parameters
Alarm messages may appear during ventilation when the ventilation parameters exceed the threshold values and
are persistently outside the ranges given below
The screen shows the alarms in the alarm signal display area (lower part of the screen) as a message and in the same
way for both the basic and advanced interface
The alarm messages concern:
•
The tidal volume (Vt):
Alarm conditions
Patient height
Small < 175 mL
Insufficient volume Medium < 235 mL
Tall < 295 mL
Small > 500 mL
Excessive volume Medium > 600 mL
Tall > 750 mL
Note
•
In continuous resuscitation mode the alarm condition is calculated based on the trend value of the
volumes If the trend value and the current value of the tidal volume are as described in the table above,
the tidal volume alarm is triggered
•
In 30:2 CPR mode the alarm condition is calculated based on the mean value of the tidal volumes during
two consecutive ventilation cycles
•
The ventilatin frequency (Freq.):
Alarm conditions Ventilation frequency value
Low frequency No insufflation for more than 5 seconds after
(continuous mode) the green lung is displayed
If the pause time (time between the end
Low frequency of expiration in one cycle and the start of
(30:2 mode) insufflation in the next cycle) is greater than 24
seconds
High frequency > 15 bpm
Note
•
In continuous resuscitation mode the frequency is calculated based on the trend value of the ventilation
frequency If the trend value and the current value of the frequency are as described in the table above,
the ventilation frequency alarm is triggered
•
In 30:2 CPR mode the alarm condition is calculated based on the actual value of the pause time
•
Leakage:
Alarm conditions Leakage value
Important leakage > 40 %
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Cause
Solution
Tidal volume value
Insufflate a volume of air within the
appropriate range as defined in the
international guidelines
Solution
Ventilate the patient at an
appropriate frequency, as
recommended in the international
guidelines
Solution
Depending on the cause of the leakage, several solutions are
possible (non-exhaustive list):
o Reposition the tracheal tube if the patient is improperly
intubated (selective intubation, tube not deep enough inside
the trachea) or inflate the bag more if the ventilation circuit is
not properly sealed
o Reposition the mask properly on the patient's face to ensure
that the ventilation circuit is properly sealed
o Completely free the patient's airways
Note
•
In continuous resuscitation mode leakage is calculated based on the trend value of the leakages If
the trend value and the current leakage value are as described in the table above, the leakage alarm is
triggered
•
In 30:2 CPR mode the alarm condition is calculated based on the mean value of the leakages during two
consecutive ventilation cycles
•
Alarm prioritisation :
All alarm messages appear in the same display area, therefore a system is necessary to prioritise the alarms Alarm
prioritisation also enables the user to focus first on correcting the most critical problem in terms of patient safety,
and avoids the additional stress of multiple simultaneous alarms
The alarms were prioritised with clinical experts, using a structured risk management process
Multiple alarm conditions
Ventilation frequency Tidal volume
Low frequency Insufficient volume
Low frequency Insufficient volume
Low frequency
Low frequency
Low frequency Excessive volume
Low frequency Excessive volume
Insufficient volume
Insufficient volume
Excessive volume
Excessive volume
High frequency Insufficient volume
High frequency Insufficient volume
High frequency
High frequency
High frequency Excessive volume
High frequency Excessive volume
Priority alarm
Leakage
Low frequency
Important leakage Low frequency
Low frequency
Important leakage Low frequency
Low frequency
Important leakage Low frequency
Insufficient volume
Important leakage Important leakage
Important leakage Important leakage
Excessive volume
Important leakage Excessive volume
High frequency
Important leakage High frequency
High frequency
Important leakage High frequency
High frequency
Important leakage High frequency
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