Volumetric Co2 Calculations; Appendix I: Volumetric Co 2 Calculations - CareFusion AVEA Operating Instructions Manual

AVEA ventilator systems
Appendix I: Volumetric CO
Note:
The AVEA assumes all gas passing through the sensor to be at BTPS (except during calibration check). Barometric
pressure (PBar) is measured with an integrated barometric pressure sensor. Gas composition must be known by the
CO sensor and algorithms to ensure accurate reporting of PCO
2
composition data.
PCO
2
Partial pressure of carbon dioxide in the inhaled and exhaled gas measured continuously and
reported by the CO
waveform.
EtCO
2
Peak partial pressure of carbon dioxide in exhaled gas reported by the CO
This is calculated for each breath and then averaged as specified by setup control EtCO
Averaging.
FCO
2
Fraction of carbon dioxide in the inhaled and exhaled gas measured continuously and reported
by the CO
is not displayed.
VCO
2
Minute volume of exhaled CO
selectable time (V
is the flow at the wye, and is measured or calculated.
VtCO
2
Tidal volume of exhaled CO
a user-selectable time (V
L2786 Rev. M
sensor at the wye. This is displayed graphically as the capnogram
2
sensor at the wye. This value is used in the V
2
. It is measured continuously and averaged over a user-
2
Average: 3, 6, 9, 12 minutes).
CO
2
. It is measured over the period of each breath and averaged over
2
Average: 3, 6, 9, 12 minutes).
CO
2
Calculations
2
. The AVEA internally reports delivered gas
2
sensor at the wye.
2
and dead space calculations but
CO
2
233
2