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• To check the current setting, select the patient name to enter the Patient Demographics menu.
BSA(B) indicates that the Boyd formula is used; BSA(D) indicates that the Dubois formula is used.
Comparing Dynamic Compliance Values
If you compare the dynamic compliance value (COMP) from the ventilation calculations with the
value from the Spirometry measurement you may see a difference. This comes from the different
sampling methods:
• The algorithm in the ventilation calculations takes into account only two sets of paired AWP/
AWV data: those from complete expiration and complete inspiration, when AWF is zero.
• The algorithm in the Spirometry application takes into account all sets of paired AWP/AWV data
(125Hz sampling rate), over one complete breath cycle, and calculates an "averaged" compliance
using a least square method.
Documenting Calculations
To send a Calculations recording to a connected recorder, in the Calculations window, select the
Print/ Record pop-up key, then select the Record Calc pop-up key.
Calculations recordings print the patient demographic information and the content of the current
Calculations window on the recorder strip.
To print a report for the calculation group currently on the monitor screen, select the pop-up key
Print
Calc
. To print the review window, select the pop-up key Print in the review window. All the
calculations in the current group will be printed in the report.
Calculation reports can be printed on central or local printers.
This example report shows the oxygen calculation group. Ventilation and hemodynamic calculation
reports are similar.
1 Patient information
2 Calculation group
3 Three columns of calculations input and output values, with times, units and ranges, where
appropriate
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