CareFusion AVEA - CO2 (Vtco2); Anatomical Dead Space (VD Ana); Anatomical Dead Space; Tidal Volume Ratio (VD; Vt Ana); Alveolar Ventilation (Va);Physiologic Dead Space (VD Phy)

AVEA ventilator systems Chapter 5: Volumetric Capnography 139
L2786 Rev. M
CO
2
(VtCO
2
)
The amount of CO
2
exhaled per breath. VtCO
2
is measured for each breath and then averaged over the set VCO
2
Averaging time.
Range: 0 – 299 mL
Resolution: 0.1 mL or three significant digits (whichever is greater)
Anatomical Dead Space (Vd ana)
Volume of dead space in the patient’s airway. Anatomical dead space is measured for each breath. This value is
averaged over the set V
CO
2
averaging time.
Range: 0 – 999 mL
Resolution: 0.1 mL or three significant digits (whichever is greater)
Anatomical Dead Space / Tidal Volume Ratio (Vd / Vt ana)
Vd / Vt ana is averaged over the set VCO
2
averaging time.
Range: 0 – 99%
Resolution: 1%
Note:
VCO
2
, VtCO
2
, Vd ana and Vd/Vt ana require flow to be measured by a proximal flow sensor at the wye, or circuit
compliance compensation to be active. If a proximal flow sensor or circuit compliance compensation are not used, the
AVEA displays *** in those fields.
Note:
An arterial blood gas sample is required to calculate VA, Vd phy, Vd/Vt phy, Vd alv, OI, and P/F. These values are
available at the Capnography Maneuver screen.
Alveolar Ventilation (VA)
Alveolar Ventilation is the volume of gas participating in gas exchange per minute.
Range: 0 – 99.9 L/min
Resolution: 0.01 L/min or three significant digits (whichever is greater)
Physiologic Dead Space (Vd phy)
Range: 0 – 999 mL
Resolution: 0.1 mL or three significant digits (whichever is greater)