P139 GUARDIAN MONITOR INSTRUCTIONS
UH1075_P139_Instructions_English.ppp 29/08/2016 16:01:45
Page 5 of 22
SHALLOW MOVEMENT MINIMUM
If the movement rate falls below this setting the monitor display will show the alarm message “SHALLOW MIN”.and
the alarm output will be activated. The setting ranges from OFF to 10 mpm (movements per minute)
The movement rate is usually averaged over a minute, but as an additional precaution zero movement detection is
ONLY delayed by the Shallow Movement Delay, which should be set to avoid false alarms during apnoea type events
(30 seconds is recommended)
See SHALLOW MOVEMENT ADJUSTMENT below on how to set the optimum value.
SHALLOW MOVEMENT DELAY
This sets the time after which an alarm (SHALLOW MOVEMENT) is raised when all shallow movement ceases. The
value is set to avoid false alarms if the user exhibits periods on excessive stillness normally (eg in sleep apnoea), but
fast enough to protect the user should a serious life threatening condition occur. If the user is know to be susceptible
to this condition then the carer is responsible for assessing the risks of using this monitor and determining any
additional surveillance necessary
SHALLOW MOVEMENT MAXIMUM ALARM
If the movement rate rises above this setting, the monitor will show the message “SHALLOW MAX”, and the alarm
output will be activated. The setting ranges from OFF to between 20 and 30 mpm.. WARNING: Very fast panting (faster
than 2 seconds) will be ignored as this conflicts with heart beats under stress and may therefore compromise fast
detection of SUDEP. However continuous activity at this rate will result in Shallow Movement Alarm instead due to the
lack of signal.
See SHALLOW MOVEMENT ADJUSTMENT below on how to set the optimum value.
SHALLOW MOVEMENT ADJUSTMENT
The normal sleeping pattern of a user will lead to great variability in the normal shallow movement pattern. The
Guardian Monitor has a built-in MAX/min movement recorder to help assess the optimum settings.
Ÿ
In the HIDDEN MENU (see later) the MAX/min DISPLAY function is enabled.
Ÿ
The Monitoring screen (when no alarm is active) will then display the Maximum and Minimum recorded values
at the start of the second line.
Ÿ
The carer resets these to a nominal value of 15 at the start of the recording period by pressing the DECREASE
(<) button.
Ÿ
At the end of the recording period the values are noted and used to judge the best limits for the SHALLOW
alarms.
Hints on setting Shallow Movement Monitoring
1. Using the TICK function is very useful to hear the movement sensor working.
2. Set the Shallow Magnification at 4 and with no user in the bed and no one touching the bed,
check the small x symbol does NOT appear on the screen. Decrease the magnification if
necessary to stop any sensor activity.
3. With the user or someone of similar weight lying on the bed check that the small x symbol
appears regularly on the screen (particularly with each breath). Increase the Magnification if not,
then recheck the x stops with no-one in the bed.
4. If SUDEP is of concern then set the Shallow Delay to 30 seconds and Shallow Min to 0. In this
case also perform a risk assessment to ensure an appropriate range of monitoring is used
5. On the first few nights do not use the Shallow Alarm Max/Min alarms but enable the “MAX/min
Display” recorder function in the hidden menu to detect the suitable settings
6. Once the user is sleeping press the DECREASE button (<) to reset & start the recorder
7. In the morning and before the user is awake, note the Max/Min readings and use these to set the
alarm values with a margin to prevent false alarms.
8. Validate operation during observed seizures and adjust the magnification and detection limits as
required. The manufacturer can be contacted for advice as required