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Page 73
Monitoring
4
User guide
CO
2
Sidestream
4.11
A
rt.
no.
: 0-48-
0227
Rev.:
g
DEFIGARD/PHYSIOGARD Touch 7
4.11.5
Settings etCO
2
menu
Access the
etCO
2
menu via the
etCO
2
display field as shown on page
The default settings are printed
bold
.
4.11.6
Curve list
4.11.7
Zero adjustment of the CO
2
sidestream sensor
Calibration intervals for ISA CO
2
sensor
• When the message
“CO2 calibration is required”
is displayed
• When an offset in gas readings is discovered (0-offset)
Zeroing procedure
1. Select the menu
CO
2
>
ETCO
2
and then the menu item “
Perform zeroing”.
The
green LED on the ISA sensor is blinking and the
Zeroing process
is displayed
on the DEFIGARD/PHYSIOGARD Touch 7.
2. When the green LED on the sensor stops blinking, the calibration is finished.
3. Check the etCO
2
curve in the display to see if the connections have been made
correctly and if the etCO
2
value is in the expected range. The curve rises during
expiration.
Menu item
Parameter
Description
Start measurement
On or
OFF
Curve amplitude (%)
8
, 12 or 15 %
Perform zeroing
Zeroing the sensor to ambient air
Type of ventilation
Air = patient ventilated only with air
Air + O2 = patient ventilated with Air and O2
MENU
Parameter
Description
Value
Curve list
Touch first curve
Selection of the displayed first curve. The
first displayed curve is used to calculate the
Heart rate unless the HR source is set to
Pleth.
II or
Defi
Default:
Touch the curves 2,3,4
Selection of the displayed curve
Defi/
I, II,
aVR, aVL, aVF,
SpO2
plethysmograph
,
EtCO2,
Respiration and IBP
Incorrect zero adjustment leads to erroneous measurement results.
Therefore, make sure that the calibration is performed in a well-ventilated room.
Avoid breathing near the gas analyser before or during the calibration.
If the ISA gas analyser is stowed in the transport bag, ensure good ventilation of
the bag or check that the gas exhaust is connected before calibration.
• The ISA sidestream gas analyser performs zeroing automatically by switching the
gas sampling from the respiratory circuit to ambient air. The automatic zeroing is
performed after startup and 1 to 3 times per day and it takes less than 3 seconds.
• During zeroing, if ISA’s exhaust gas is returned to the patient circuit, the returned
gas level will be different from the gas level at the sampling site.