20-6 Passport 12/Passport 8 Operator’s Manual
20.4.3 Calculated Parameters and Formulas
Abbreviation Unit Full spelling Formula
PAO
2
mmHg partial pressure of oxygen in the alveoli
(ATMP－47) × FiO
2
/100 －PaCO
2
×
[FiO
2
/100 ＋ (1－FiO
2
/100) / RQ ]
AaDO
2
mmHg alveolar-arterial oxygen difference
PAO
2
－ PaO
2
Pa/FiO
2
mmHg oxygenation ratio 100 × PaO
2
/ FiO
2
a/AO
2
% arterial to alveolar oxygen ratio 100 × PaO
2
/ PAO
2
MV L/min minute volume (TV × RR) / 1000
Vd ml volume of physiological dead space
TV × (1 － PeCO
2
/ PaCO
2
)
Vd/Vt % physiologic dead space in percent of tidal volume 100 × Vd/TV
VA L/min alveolar volume
(TV－ Vd) × RR / 1000
20.5 Hemodynamic Calculations
20.5.1 Performing Calculations
To perform a hemodynamic calculation:
1. Select [Main Menu]→[Calc >>]→[Hemodynamic >>], or select [Calculations] QuickKey→[Hemodynamic >>].
2. Enter values for calculation.
For a monitored patient, [HR], [Art mean], [PA mean] and [CVP] are automatically taken from the currently
measured values. If you have just performed C.O. measurements, [C.O.] is the average of multiple
thermodilution measurements. [Height] and [Weight] are the patient’s height and weight you have entered.
If the monitor does not provide these values, their fields are blank.
For an unmonitored patient, confirm the entered values.
3. Select the [Calculate] button. The system performs a calculation per the current settings and displays the
calculated values.
If a calculated value is outside the range, its background will highlight in yellow. You can select [Range] to
view its normal range in the unit field.
Invalid values are displayed as [---].
In the [Hemodynamic Calculation] window, you can:
Trigger a recording by selecting the [Record] button. The currently displayed hemodynamic calculations are
printed out by the recorder.
Review the previously performed calculations by selecting [Review].
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