Treaton MV200, User Manual

Page: 119 / 222

4.19 Features of using virus-bacterial and heat and moisture exchange filters
4-71
At opening of the extended respiratory monitoring windows the alarm list
becomes unavailable. To access the alarm list, go to the RESP 1 window.
4.19 Features of using virus-bacterial and heat and moisture exchange
filters
When antibacterial filter is in the expiration line the undesirable increase in breathing resis-
tance can occur, especially if the filter is used together with the nebulizer and humidifier. This
can lead to the hard work of the patient's breathing and increased pressure in the respiratory
system (autoPEEP phenomenon). Unwanted pressure increase in the respiratory system of the
patient can be identified by the fact that the flow of exhaled gas by the end of exhalation does
not fall to zero.
Check the virus-bacterial filter and replace it, if it is suspected that is causes autoPEEP increas-
ing.
Figure 4.12 – The effect of extending of the expiraiton flow due to the increased filter resistance
The heat and moisture exchange filter in the breathing circuit can significantly increase resis-
tance to the inspiration and expiration.
Increased resistance causes the increased patient’s work during spontaneous breathing or in-
itialization trigger effort at trigger support ventilation. Under unfavorable circumstances, increas-
ing of the expiration resistance can lead to an undesirable increasing of the pressure in the res-
piratory system of the patient (autoPEEP phenomenon).
The resistance connected with the heat and moisture exchange filter, the device cannot control
directly. Therefore, when using the heat and moisture exchange filter user should:
•
frequently monitor the patient's condition;
•
carefully follow to the guidance on the proper use of heat and moisture exchange filter.
It is prohibited to use heat and moisture exchange filter with nebulizer or
with the respiratory gas humidifier!