Automatic compliance correction
Only set the effective tidal volume!
The compliance of the breathing system and of the hoses
used is established by the equipment during the self-test
or if a leakage test is started manually. The reduction in
tidal volume due to system compliance is then corrected
automatically during ventilation so that the patient actually
receives the set tidal volume.
The leakage test should therefore be repeated whenever
changes have been made in the hoses.
The patient must always be disconnected and
the system set to »standby« before starting
the leakage test!
(see page 48 onwards)
A detailed description of automatic compensation of
the system compliance can be found in the Annex on
page 129.
Ventilation with pressure limitation
When the set maximum ventilation pressure P
max
has
been reached, the inspiratory stroke is adjusted so that
the pressure remains constant up to the end of
inspiration.
The set tidal volume is not fully applied in this case!
1
Display on ventilator:
Pressure limit
2
The bar graph on the ventilator does not reach 100%.
If the pressure increases by more than 5 mbar above
the maximum ventilation pressure P
max
, e.g. because
the patient coughs, inspiration is immediately stopped
and expiration starts.
Limit settings
–
P
max
, PEEP
The minimum difference between P
max
and PEEP
equals 10 mbar. Settings resulting in a smaller
pressure difference are not accepted by the system.
–
Max. inspiratory flow
The tidal volume, frequency, I:E ratio and inspiratory
pause time cannot be set to values resulting in an
inspiratory flow of more than 75 L/min.
–
Max. minute volume
The tidal volume and frequency cannot be set to
values resulting in a minute volume of more than
25 L/min.
40
Operation
IPPV
1
2
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