18 - 2
18.2 CO
2
 Safety Information
• Route all tubing away from the patient’s throat to avoid strangulation.
• Avoid mechanical shock to the sidestream CO
2
 module configuring the paramagnetic oxygen 
sensor.
• Remove the airway sample line from the patient’s airway while nebulized medications are being 
delivered.
• EtCO
2
 values measured from the CO
2
 module may differ from those of from the blood gas analysis.
• The CO
2
 module automatic suppresses physiological alarms until breathing waves have been 
detected. Make sure that a patient is properly connected when monitoring with the CO
2
 module.
18.3 CO
2
 Measurement Limitations
The following factors may influence the measurement accuracy:
■ Leaks or internal venting of sampled gas
■ Mechanical shock
■ Cyclic pressure up to 10 kPa (100 cmH
2
O)
■ Other sources of interference, if any
Measurement accuracy of the sidestream CO
2
 module may be affected by the breath rate and inspiration/
expiration (I/E) ratio. Measurement accuracy of the microstream CO2 module may be affected by the breath rate. 
For more information, see A.13.9CO
2
 Specifications.
18.4 CO
2
 Display
The CO
2
 numeric and waveform area provide FiCO
2
 measurement, EtCO
2
 measurement, awRR measurement, 
and a CO
2
 waveform.
(1) CO
2
 waveform (2) End tidal CO
2
 value (EtCO
2
)
(3) Airway respiration rate (awRR) (4) Fraction of inspired CO
2
 (FiCO
2
)