14 Monitoring Carbon Dioxide
210
3
Change the FilterLine if a CO₂ Occlusion INOP appears on the monitor or if the readings become
extremely erratic.
Disconnect the FilterLine during suctioning and nebulizing therapies or suppress sampling by turning
off the pump as described in “Suppressing Sampling (not Mainstream CO2)” on page 211.
Check the table in the Microstream CO
2
Accessories section of the Accessories chapter for typical
usage times for the different Microstream accessories.
CO
2
values for non-intubated patients using Microstream accessories will always tend to be lower than
for intubated patients. If values appear extremely low, check whether the patient is breathing through
the mouth or whether one nostril is blocked.
Removing Exhaust Gases from the System
WARNING
• Anesthetics: When using the Microstream CO
2
measurement on patients who are receiving or
have recently received anesthetics, connect the outlet to a scavenging system, or to the anesthesia
machine/ventilator, to avoid exposing medical staff to anesthetics.
• Patient cross-infection: Do not return the sampled gas to the breathing system of the patient.
• Make sure that you do not accidentally connect the exhaust tube to an infusion link or any other
links in the patient vicinity.
Use an exhaust tube to remove the sample gas to a scavenging system. Attach it to the MMS Extension
at the outlet connector.
Suppressing Zero Calibration
To prevent an automatic zero calibration from being started in the next five minutes,
•in the
Setup CO₂ menu, select No Zero for 5min, or select the Suppress CO₂ Zero SmartKey, if
configured.
Selecting
No Zero for 5min or selecting the Suppress CO₂ Zero SmartKey again before the timer has
timed out resets the timer to five minutes, unless an AutoZero became due during the previous
suppression.
Setting up all CO2 Measurements
These tasks are common to all CO
2
measurements except where otherwise noted.
Adjusting the CO2 Wave Scale
1 In the CO₂ Wave menu or the Setup CO₂ menu, select Scale.
2 Choose a suitable scale range from the pop-up list.
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