Device Check
Before use on patient
Immediately before using on the patient, check that the
machine is working properly and is ready for operation.
Evita 4 supports this »device check« by means of a built-
in checklist that guides the user through the test in a
dialogue mode.
The following functions are performed during this device
check:
– Checking that the machine assembly is complete,
– Testing the alarm tone,
– Testing the expiratory valve,
– Testing the air-O2 change-over valve,
– Testing the safety valve,
– Calibrating the flow sensor,
– Calibrating the O2 sensor,
– Calibrating the CO2 sensor,
– Testing the leakproofing of the hose system,
– Checking the compliance of the hose system.
The test results obtained from this device check and the
calibration and zero-checking values of the sensors
remain stored until the next calibration – even if the
device is switched off.
If the hose system, type of humidification or patient mode
is changed after performing the device check, the
leakproofing test must be repeated before starting
operation.
Preparing the adult test lung 84 03 201
for the adult hose system
The test lung consists of an elbow connector for
connection to the Y-piece, a 7 mm diameter catheter
connection for simulating the resistance of the airways
and a 2 litre breathing bag to simulate compliance.
● Overextended breathing bags must not be used as
they may cause artefacts during the device check!
● The elbow connector must not be plugged into the
patient connection of the Y-piece until directed by
Evita 4.
Preparation
Device Check
42
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