CareFusion AVEA - Monitored Values; Zero Co2;Calibration Check; End Tidal CO2 (Etco2); CO2 Elimination (VCO2)

138 Chapter 5: Volumetric Capnography Operator's manual
L2786 Rev. M
Zero CO
2
This control initiates the sensor zero procedure. This procedure needs to be done only when you switch airway adapter
types (disposable or reusable) and as part of the calibration check. See the section “Zeroing the CAPNOSTAT 5” on
page 144.
Note:
The CO
2
Zero and calibration-check controls are available only when CO
2
is enabled and a sensor has been
connected and has completed initialization. This initialization may take up to five seconds.
Calibration Check
This control provides access to a calibration-check procedure. This procedure needs to be done only during the yearly,
preventative maintenance procedure. See the section “Checking the Accuracy of the CAPNOSTAT 5” on page 146.
Monitored Values
End Tidal CO
2
(EtCO
2
)
The patient’s peak expired CO
2
as measured and reported by the CO
2
sensor in the airway. EtCO
2
is measured for each
breath. The display is either a breath-by-breath measurement or an averaged measurement.
Range: 0 – 150 mmHg (0 – 20.0 kPa)
Resolution: 0.1 mmHg (0.01 kPa) or three significant digits (whichever is greater)
Accuracy:
± 2 mmHg for 0 – 40 mmHg
± 5% of reading for 41 – 70 mmHg
± 8% of reading for 71 – 100 mmHg
± 10% of reading for 101 – 150 mmHg
Note:
The minimum differential between inspired and expired CO
2
must be 5 mmHg (0.7kPa) or greater.
WARNING!
Do not use EtCO
2
as basis for changing ventilation parameters without reference to clinical condition and
independent monitors such as blood gas.
CO
2
Elimination (VCO
2
)
The amount of CO
2
eliminated every minute. This is calculated over each minute, and then averaged over the set VCO
2
averaging time.
Range: 0 – 999 mL/min
Resolution: 0.1 mL or three significant digits (whichever is greater)