Monitoring
122
Instructions for Use Fabius MRI SW 3.n
Oxygen Monitoring
Inspiratory oxygen concentration is measured with
a dual galvanic cell sensor, which is attached to the
inspiratory valve dome. The sensor contains two
independent electrochemical cells, or sensor
halves. When the sensor is exposed to oxygen, an
electrochemical reaction occurs within each cell.
The oxygen monitor measures the current pro-
duced in each cell, computes an average for the
two cells, and translates the average into an oxy-
gen concentration measurement.
Oxygen Monitoring Window
The oxygen monitoring window shows the following
information:
1 numerical value for inspiratory oxygen concen-
tration in percent (%) within the range of 10 %
to 100 %
2 high oxygen concentration alarm limit
3 low oxygen concentration alarm limit
Setting Oxygen Monitoring Alarm Limits
Follow the procedure "Setting Alarm Limits" on
page 121 to change the high or low alarm limit.
CAUTION
Risk of inaccurate measuring values
Never remove an oxygen sensor from its housing,
except to replace it. If a sensor is removed from its
housing, you must do the following before con-
tinuing normal operations:
– Reinstall the sensor in the housing.
– Calibrate the sensor.
NOTE
When the machine is not in use, remove the oxy-
gen sensor assembly from the inspiratory valve
dome, and insert the valve dome plug into the
dome.
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