Note On The Use Of Heat And Moisture Exchangers; Note On The Use Of Bacterial Filters - Dräger Evita 2 dura Instructions For Use Manual

Preparing for use

Note on the use of heat and moisture exchangers

Note on the use of bacterial filters
Note on the use of heat and moisture
exchangers
The use of heat and moisture exchangers (HME's) in the
patient connection can considerably increase breathing
resistance. An increase in breathing resistance will in turn lead
to greater effort in spontaneous breathing and/or greater
trigger effort during assisted ventilation. Under unfavourable
conditions, an increase in breathing resistance can lead to an
unwanted intrinsic PEEP.
This breathing resistance in the patient connection cannot be
directly monitored by the ventilator.
●
The condition of the patient and the ventilator's measured
values for air volume and resistance must be checked more
frequently.
●
Follow the Instructions for Use of the heat and moisture
exchanger (HME).
●
Do not use the heat and moisture exchanger (HME) at the
same time as a medicament nebuliser or humidifier!
Note on the use of bacterial filters
The use of expiratory bacterial filters and/or HME filters on the
ventilator is not recommended.
However, if bacterial filters are nevertheless used on the
expiration side, an undesirable increase in breathing
resistance is possible. Especially during medicament
nebulisation and humidifying, the resistance of the expiratory
bacterial filter may increase gradually. For the patient, the
effect may be increased breathing effort and intrinsic PEEP.
An intrinsic PEEP can be recognised by the fact that the
expiratory flow does not return to "0" before the end of
expiration.
If PEEP is unacceptably high, the unit signals the
»!!! PEEP high« alarm.
●
Check the bacterial filter and replace it if it is the cause of
the PEEP.
The inspiratory and expiratory breathing resistance of the
patient system can be determined before ventilation by the
device check in standby mode – see page 30 onwards.
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