Technical Description
17
TREND II AUTO
Within a certain pressure range the device automati-
cally controls the therapy pressure depending on the
occurrence of respiratory events. In sleep phases with no
events the therapy pressure is lowered. Starting obstruc-
tive events are treated effectively with a slight pressure
increase.
For a high therapy comfort the therapy pressure should
always be only as high as necessary and as low as pos-
sible.
The device can recognize the following respiratory events:
•
Obstuctive apnea
•
Hypopnea
•
Central apnea
•
Snoring
•
Normal respiration
•
Increased airway resistance
The identi
fi
cation of the different respiratory events is
achieved via 3 channels:
1.
Measurement of any constriction of the respiratory
tract
2. Detection of
fl
ow limitations by measuring the
fl
ow
3. Detection of snoring with the help of sound detec-
tion
