22
Description of device
EN
•
Signal control mode:
if the device is receiving valid signals from the diagnostic nasal
cannula and/or the pulsoximetry sensor outside a recording, it switches from the results
display to signal control mode. The device displays current measured values, but does
not store them. If the device is no longer receiving signals, it automatically switches
back to the results display. A check is made in signal control mode that the sensors are
attached correctly. In signal control mode, the display goes out after 2 seconds and can
be called up again by pressing the button briefly.
•
Recording mode:
when the device is receiving valid signals from the diagnostic nasal
cannula and/or the pulsoximetry sensor in signal control mode and the button on the
device is pressed for three seconds, the device performs a signal test and then switches
to recording mode. Alternatively, it is possible to use the PC software to program a
recording time at which the device starts recording (from SOMNO
lab
Version 2.11). It
is then only possible to start the recording manually if the PC software is used to
program manual recording mode (manual recording start) or if all the data on the
device have been erased (see “5.5 After the recording” on page 39).
The recording overwrites older recordings. A floppy disk symbol with an arrow pointing
towards the floppy disk symbol appears at the bottom right of the display. During
recording, the device shows in the display the current oxygen saturation, pulse
frequency and respiratory flow measured and stores these values. A recording generally
lasts 8 hours. Other recording times can be set using the PC software (from SOMNO
lab
Version 2.11 onwards). If the PC software was used to enter a patient name, this name
is retained in the device until the data in the device are erased and the software is used
to configure a new recording. In recording mode, the display switches off after
30 seconds to save power. Every press of the button switches on the display for
30 seconds.
If the device no longer receives valid signals during the recording (for example because
the pulsoximetry sensor is no longer correctly attached to the finger), it stores zero
values until the end time is reached and then switches off automatically.
If the device does not receive any valid signals at the start of the recording when the
recording time has been programmed, the device switches off automatically after 2
minutes. After another 20 minutes, the device tries to start another recording. The
recording can be started manually during this period. If there are still no valid signals
being received after the 10th attempt, the device starts a recording the next day at the
programmed time. If it has not been possible to start a valid recording after a week, the
device erases the patient name and start time, and recording can be started manually
again.
