D Evita 4
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Operation
Special Functions
Oxygen enrichment for bronchial suction
Oxygen enrichment for bronchial suction
To avoid any risk of hypoxia during bronchial suction,
Evita 4 offers a program for oxygen enrichment during
the removal of secretions.
After the program is started, Evita 4 ventilates the patient
in the selected ventilation mode for an initial oxygen
enrichment phase of 180 seconds. In adult mode, the
ventilator supplies 100 % oxygen by volume, and in
paediatric mode it delivers the set O2 concentration
plus 25 % (for example: setting = 60 % by vol.;
administered = 75 % by vol.)
When the ventilator is disconnected for suction, Evita 4
interrupts ventilation. During the suction phase, the
audible alarms are suppressed so that the suction routine
is not disturbed.
After suction and automatically recognised reconnection,
Evita 4 delivers an increased O2 concentration for the
final oxygen enrichment phase of 120 seconds. In adult
mode, the O2 concentration is 100 % by volume. In
paediatric mode, the enriched concentration is 25 %
higher than the set concentration.
During suction and for 2 minutes afterwards, the lower
alarm limit for the minute volume is switched off.
Other alarms are switched off during suction and for
15 seconds afterwards.
Oxygen enrichment is only possible with a fully
functioning flow sensor and if flow monitoring is
switched on.
Before suction
1 Hold down the »O2 suction« key until the yellow
LED comes on.
Evita 4 ventilates the patient in the set ventilation
mode with increased O2 concentration: 100 % O2 by
volume in adult mode, and 25 % higher O2 con-
centration than the set value in paediatric mode.
If PEEP is not set to more than 4 mbar, PEEP will be
applied automatically at 4 mbar. This PEEP will enable
Evita 4 to detect any subsequent disconnection.
The other ventilation parameters remain unaffected.
● Display in the help line at the bottom edge of the
screen:
O2 enrichment 180 s
The remaining time is counted down continuously.
This initial oxygen enrichment lasts for a maximum of
180 seconds. During this time, Evita 4 waits for a dis-
connection for suction.
If there is no disconnection after expiry of the
180 seconds, the oxygen enrichment program is
terminated.
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