GE CARESCAPE, User Manual

Page: 406 / 548

Calculations
data for hemodynamic calculations. However, C.O. or CCO and/or their indexed values
that are older than 15 minutes are not used as source data. Other input values (for
example, HR, PA Mean, CVP, Art Mean) used in the calculation are chosen from the
same time the sample is drawn or the cardiac output is measured. For oxygenation
calculations the monitor uses laboratory data as source data.
In oxygenation calculations, you can select any available arterial laboratory data
samples or any C.O. measurement (if no laboratory data but multiple C.O. values are
available) from the current patient case to be used as source data.
In ventilation calculations, you can select any arterial laboratory data samples from
the current patient case to be used as source data.
Selecting source data for oxygenation calculations
1. Select Data & Pages .
2. Select Calculations .
3. Select the Oxy tab.
4. Select Edit Input .
5. Select the desired sample with corresponding time and date from the Select Lab
Data list.
Selecting source data for ventilation calculations
B850 and B650 only.
1. Select Data & Pages .
2. Select Calculations .
3. Select the Vent tab.
4. Select Edit Input .
5. Select the desired sample with corresponding time and date from the Select Lab
Data list.
Estimated values in oxygenation calculations
In normal circumstances, about 3% of the total arterial oxygen content is dissolved in
the blood and 97% is hemoglobin bound. When no SaO
2
laboratory result is saved
in the Laboratory Data menu, the measured SpO
2
value is used to estimate the
clinically relevant SaO
2
value. Also, the measured EtCO
2
value is used to estimate the
PaCO
2
value.
The monitor marks the estimated values by adding the letter e to the SaO
2
and PaCO
2
values in the Calculations > Oxy > Trend and Calculations > Oxy > View .
Estimated values in hemodynamic calculations
You can select different sources for the PCWP. If you select LAP mean or PA , the PCWP
value in Hemo > Trend will be marked as an estimated value with the letter e. Instead,
the Hemo > Edit Input and Hemo > View show the actual selected label.
406 CARESCAPE Modular Monitors 2062971-001