Operator's Manual

6.4 Capnography
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 107
Once the Capnometer is active it will run until the cannula is unplugged from the Tempus. Note that the
wave speed of the capnogram is slower that the ECG and Pleth by default.
Once the Capnometer is started it will display the message “Warming up” for approximately 30 seconds.
ETCO
2
readings will then display immediately and respiration readings will appear 2 breath cycles after the
EtCO
2
readings appear. If the Capnometer is sufficiently warm, it can take as little as 7 seconds to return an
ETCO
2
reading and 12 seconds to return a respiration rate reading (assuming a rate of >10 rpm).
Once the Capnometer has started, check that the connections have been made properly by confirming the
capnogram waveform appears correctly.
Note
If impedance respiration was in use, the waveform will automatically change to “CAPNO”
and will display the end tidal CO
2
as soon as the cannula is connected. As soon as the
cannula is disconnected (and the consequent error is cleared) the device will resume
monitoring using impedance respiration.
After the Capnometer has started, it should draw a steady flow of breath gas down the cannula. If the
cannula becomes blocked, the Capnometer will attempt to free the blockage by forcing low pressure air into
the cannula. While this is occurring the waveform and readings will not be displayed and a message saying
“Capnometer filter line purging” will be displayed in the waveform area. If the purging is successful then
operation will resume automatically, if the blockage cannot be cleared (45 seconds approx.) then an error
will be posted instructing to replace the cannula and the Capnometer will cease operation until the cannula
is removed and replaced.
6.4.3 Capnometer settings
Pressing anywhere in the capnogram area brings up the Capnometer settings menu:
Menu option Menu screen
Respiration limits (rpm) – set the upper and
lower alarm limits for respiration.
No breaths (sec) – set the time that elapses
after detection of no breaths until the alarm
sounds.
ETCO2 limits – set the upper and lower
alarm limits for ETCO2.
ETCO2 units – select mmHg or kPa.
Wave range – adjust respiration wave height
and amplitude.
Respiration wave speed (mm/s) – set wave
speed to 3.1, 6.25 or 12.5.
The Capnography Section of the Home Screen
The Respiration
rate reading is
shown here
The ETCO2
reading is shown
here
The capnogram
is shown
continuously