CareFusion AVEA Operating Instructions Manual page 248

234
FeCO
2
Percentage of carbon dioxide in the exhaled gas reported by the CO
value is used in the dead space calculations but is not displayed.
PeCO
2
Mean exhaled partial pressure of carbon dioxide in the exhaled gas reported by the CO
sensor at the wye. This value is used in the dead space calculations but is not displayed.
Physiologic Dead Space (Vd phy)
Comprises anatomic dead space (see below) as well as the volume of the respiratory zone
(respiratory bronchioles, alveolar ducts and alveoli) not participating in gas exchange. The
classic Bohr-Enghoff
arterial CO
Physiologic Dead Space / Tidal volume ratio (Vd phy / Vt)
Used to calculate the ratio of the tidal volume not participating in gas exchange (wasted
ventilation).
2
Enghoff H: Volumen inefficax: Bemerkungen zur Frage des schadlichen Raumes. Upsalla Lakareforen Forhandl, 1938;
44:191-218.
Appendix I: Volumetric CO2 Calculations
2
equation is used to calculate physiologic dead space. This method uses
(PaCO ) as an estimator for alveolar CO
2 2
sensor at the wye. This
2
(PACO ).
2 2
Operator's manual
2
L2786 Rev. M