User's Manual

Capnography
21-13
Selecting Gas Compensation
The measurement of CO
2
by infrared analysis is affected by the presence of
oxygen and nitrous oxide. The module must be set up with the appropriate
compensations turned on in order to obtain accurate end-tidal CO
2
readings when
increased levels of O
2
(greater than 60%), or N
2
O (greater than 50%) are present
in the airway.
Restoring Default Settings
With the Module Configuration Manager feature, you can restore all default
settings. User-configurable options are listed in Setting User-Defined Default
Values on page 7-7.
!
• High concentrations of O
2
will cause a lower than expected CO
2
reading.
• High N
2
O level will cause a higher than expected CO
2
reading.
To select gas compensation:
1 Touch GAS.
2 Touch COMP.
3 Select N2O ON, if N
2
O is
greater than 50%.
4 Touch O2 AUTO to
automatically select COMP, if
O
2
cell is present.
5 Select O2 MAN, if no O
2
cell is
present.
6 Select O2 ON, if O
2
is greater
than 60%.
To restore default settings:
1 Touch GAS.
2 Touch SETUP.
3 Touch RESTORE SETTINGS.
4 Select YES.