Lowenstein Medical prisma VENT AQUA 100506, Инструкция по использованию и техническое описание, Страница: 20 / 44

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6.1 Description of the
operating modes
6.1.1 NHW
NHW "Non Heated Wire" means: without
heating wire and without temperature
probe.
In this mode, a simple, unheated breathing
tube system is used. The heating plate
temperature is adjusted to a desired value,
which can be selected by the user via three
settings.
The breathing gas is humidified and heated
when passing through the humidification
chamber, which means the respiratory
gas temperature and its humidity intensity
correlate. The respiratory gas that leaves
the humidification chamber has a relative
humidity of about 100%. Since no heated
tube is used in this mode, the breathing gas
cools more quickly on the way to the patient
than with the use of a heated breathing tube
system
In this operating mode, this inevitably results
in increased condensation because the
breathing gas cools to a temperature level
below the dew point on its way to the patient.
To avoid excessive condensation at low
ambient temperatures, the heating plate
temperature is adjusted automatically.
Should too much condensation build up in
the breathing tube system, we recommend
reducing the level of humidification.
6.1.2 HWC
HWC “Heated Wire Calculated” means:
with heating wire but without a
temperature probe.
As no temperature probe is used in this
mode of operation, the output of the
heating plate and the heating wire must
be calculated. Based on the heating plate
temperature, heating plate power and room
temperature parameters, the machine
selects the necessary settings, so that the
required temperatures are reached.
In this mode, there is less condensation than
in the operation without heating wire. The
nominal value of the humidification intensity
can be selected in three steps.
NOTE
During extended operation of the treatment
device with a high flow rate, the value must
not drop suddenly.