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Performing and Reviewing Calculations
Trends and Calculations 8-21
Trends and
Calculations
Performing
Calculations
Calculations can be performed using automatically-entered values or
manually-entered values. If a parameter is being continuously monitored,
its value is automatically entered. Values which are not monitored must
be entered manually. You can also change any of these values if needed.
In hemodynamic calculations, if the systolic and diastolic pressures are
manually entered via the cursor keys or the handheld keypad, the mean
pressure is calculated, marked with an asterisk, and stored automatically.
The following formula will be used to estimate the mean pressure:
systolic + (diastolic x 2) / 3
Both indexed and non-indexed values are calculated. Calculated and input
values are first presented with their associated units. If desired, the units
column for calculated values may be replaced with normal ranges, and
the input units column may be replaced with the times at which the
values were stored in the database.
Parameters that are sourced in kPa, cmH
2
O or mbar are automatically
converted into mmHg to provide consistent indexed and non-indexed
calculation units. Ventilation calculations convert input pressures from
mmHg, kPa, and mbar into cmH
2
O before calculating output values.