Heyer iTernIS ADV, Operator'S Manual

Page: 181 / 218

Operational verification | iTernIS ADV
15. 5
Table 15-2 Alarms Verification
TEST ACTION VERIFICATION
Disconnection
Disconnect the test lung from
the circuit.
The Disconnection alarm
signals should appear wi-
thout delay.
Auditory alarm
signal pause
During the active disconnec-
tion alarm, press the pause
key of the auditory alarm
signal.
The auditory alarm signal
should pause for a period
of 30 s.
Maximum
pressure
Regulate the alarm limit level
to 5 cmH
2
O above the current
pressure value. Then, during
an inspiratory phase, squeeze
the test lung.
The Maximum pressure
should appear immediately
and the peak pressure value
should not exceed that of the
established alarm limit.
Maximum VT
Regulate the VTmax alarm
limit below the reading of the
actual VT.
After 10 s the corresponding
alarm signals should appear.
Minimum VT
Regulate the VTmin alarm
limit to 20 mL. above the
current value.
After 10 s the corresponding
alarm signals should appear.
Maximum rate
Regulate this alarm limit to 20
rpm. Simulate spontaneous
breathing by squeezing and
releasing the test lung at a
rate greater than 20 times per
minute.
After 30 seconds of having
exceeded the 20 rpm, the
maximum rate alarm signals
should appear.
Apnea
Select the PSV ventilation
mode without changing the
menu Backup Ventilation.
Squeeze the test lung, only
once, to generate sponta-
neous breathing. Then sus-
pend the generated sponta-
neous breathing.
15 s after the last sponta-
neous breath, Apnea alarm
signals should appear, and
the ventilation mode must
change from PSV to the
configured mode of Backup
Ventilation.
Electric power
failure.
Disconnect the electric power
cable.
The corresponding alarm
signals should appear im-
mediately.
Maximum VM
(For ADL and
PED patient
category)
Select the MMV+PSV mode
and begin the ventilation
using the default parameters.
Regulate the VMmax alarm
limit to 4.0 L/min. Exceed this
limit by squeezing the test lung
repeatedly.
The corresponding alarm
signals should appear 10 s
after the ventilation starts to
exceed the limit.
Minimum VM
While in MMV +PSV, regulate
the VMmin alarm limit to 8.0 L/
min. Apply repeated pressure
to the test lung so as not to
exceed the alarm limit.
The corresponding alarm
signals should appear 10 s
after the ventilation starts to
go under the limit.
The tests which require user intervention have already been covered in the pre-
vious sections. Operative verification is an automatic control performed by the ven -
tilator during the initial calibration. For further information on the nature of these
tests, refer to chapter
Start-up and Initial Calibration .
15.5 | Operative Verification