10
Description of device
EN
•
T
(can only be selected on
SOMNO
vent
auto-ST).
A minimum frequency for preventing central apneas can be set in S mode. The minimum
respiratory frequency takes effect as a background frequency as soon as the patient
breathes more slowly than set.
One of three therapy objectives can be set in ST mode. Depending on the setting, mean-
ingful default settings are loaded for the remaining parameters and the setting limits for
individual parameters are modified.
ST mode includes two automatic background frequencies, one with the objective of largely
spontaneous ventilation and one with the objective of largely controlled ventilation. The
appropriate background frequency and the I:E ratio are activated automatically when the
therapy objective is selected.
If no therapy objective is set, background frequency up to 30/min, I:E ratio and a latency
time until the first mandatory breath occurs can be specified manually.
In T mode, frequency and I:E ratio can be set in addition to pressure level on inspiration and
exhalation.
The trigger automatically adapts to the patient. If required, the supervising doctor can in-
crease or reduce trigger sensitivity.
A different speed can be set for pressure rise on inspiration if required.
Auto On/Off can be activated on the therapy device. The therapy device can be switched
on by a breath being taken into the mask and switches off automatically if not being used.
The therapy device can be used to check whether the mask is correctly fitted. Leaks due to
a poorly-fitted mask often only occur at relatively high pressures. To check that the mask
is leaktight, it is possible to output a higher pressure during the first 30 seconds after the
therapy device is switched on. This pressure is adjustable.
A qualitative leakage display is available during therapy.
Automatic Softstart is integrated to facilitate falling asleep. When you switch on, the pres-
sure is reduced to the Softstart pressure set by the doctor. Therapy pressure then slowly
rises to the specified value.
In CPAP mode, it is also possible to set an initial pressure which is higher than set CPAP
pressure. The therapy pressure then remains at the set value during the set initial pressure
phase.
The therapy device saves data for checking and adjusting therapy and thus allows extensive
analysis by the doctor.
If the power supply is interrupted and then restored, the therapy device will be in the state
it was in before the interruption. Saved data are retained.