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14Monitoring Carbon Dioxide
WARNING
Measurements from an MMS extension connected to the monitor are not available when the monitor
is running on its own battery power. They are only available when the monitor is powered by the
external power supply (M8023A) or the Battery Extension (865297).
CAUTION
Only one CO
2
measurement at a time is supported.
Use the CO
2
measurement to monitor the patient's respiratory status and to control patient ventilation.
There are two methods for measuring carbon dioxide in the patient's airway:
• Mainstream measurement uses a CO
2
sensor attached to an airway adapter directly inserted into
the patient's breathing system. This method is available using the monitor's built-in CO
2
measurement (optional) or the M3014A Capnography Extension.
• Sidestream measurement takes a sample of the respiratory gas with a constant sample flow from
the patient's airway and analyzes it with a remote CO
2
sensor. You can measure sidestream CO
2
using the monitor's built-in CO
2
measurement (optional) or using the M3014A Capnography
Extension, or the M3015A/B Microstream CO
2
Extension.
WARNING
Correlation: The etCO
2
readings do not always correlate closely with paCO
2
, especially in neonatal
patients and patients with pulmonary disease, pulmonary embolism or inappropriate ventilation.
Pharmaceuticals in aerosols: Do not measure CO
2
in the presence of pharmaceuticals in aerosols.
Explosion Hazard: Do not use in the presence of flammable anesthetics or gases, such as a
flammable anesthetic mixture with air, oxygen or nitrous oxide. Use of the devices in such an
environment may present an explosion hazard.
Failure of operation: if the measurement or a sensor fails to respond as described, do not use it until
the situation has been corrected by qualified personnel.
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