Medicament nebulisation
During adult ventilation
Applicable in every ventilation mode.
Evita 4 applies the medicament aerosol in synchronisa-
tion with the inspiratory flow phase and maintains the
minute volume constant.
The medicament nebuliser is supplied by the ventilator
with medical air, oxygen or a mixture of medical air and
oxygen according to the set O2 concentration. Deviations
in O2 concentration are therefore kept to a minimum.
In extreme cases (with a minimum inspiration flow of
15 L/min), the deviations can be up to ± 4 % by volume*.
To avoid greater deviations, medicament nebulisation is
automatically switched off with inspiration flows below
15 L/min.
During paediatric ventilation
Medicament nebulisation is possible in the pressure-
controlled paediatric ventilation modes.
In volume-controlled ventilation modes, medicament
nebulisation is only possible with AutoFlow
.
Unlike in adult ventilation, the medicament nebuliser
nebulises continuously in paediatric ventilation, but the
aerosol generated during expiration does not reach the
lungs.
Depending on the set O2 concentration, the medicament
nebuliser is supplied by the ventilator with medical air,
oxygen or a mixture of medical air and oxygen. Deviations
in O2 concentration are therefore kept to a minimum.
We recommend that you do not use the medicament
nebuliser at breathing rates of less than 12 bpm.
For breathing rates above 12 bpm, please refer to the
graph on page 177.
The maximum possible deviations in O2 concentration
are ±4 % by volume.
For breathing rates of less than 12 bpm, the
deviations in O2 concentration may be much greater.
These deviations cannot be detected by the device's
internal O2 concentration monitor.
_____________
* For a detailed description of the inspiratory O2 concentration during
medicament nebulisation, please refer to the Appendix, page 177.
88
Operation
Special Functions
Medicament nebulisation
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