RADIOMETER FLEX ABL90, Reference Manual

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ABL90 FLEX reference manual 8. Parameters
8-19
Units and numerical format of derived parameters
Derived parameters are calculated or estimated on the basis of measured and
keyed-in data. Calculations are made using equations programmed into the
analyzer. The accuracy of the calculations depends on the input parameters
keyed into the analyzer’s computer.
If the calculation of a parameter requires input from the operator, but this input
is not forthcoming, the analyzer will use certain default values (refer to the
section Default values in this chapter).
Not all input parameters are stored as defaults. In these instances the
dependent derived parameter will not be reported if the relevant input
parameter(s) is/are not entered.
If the default values are used in the calculation of a parameter, then a
parameter is considered estimated ("e") rather than calculated ("c").
The table below lists the electrolyte derived parameters for the analyzers.
Symbol Unit Analyzer Input parameter Sample
type
Anion Gap, K
+
meq/L,
mmol/L
c
2)
Anion Gap meq/L,
mmol/L
c
3)
cCa
2+
(7.4) meq/L,
mg/dL,
mmol/L
c
4)
mOsm mmol/kg c
5)
2) If the analyzer includes K
+
, Na
+
and Cl
–
measurements.
3) If the analyzer includes Na
+
and Cl
–
measurements.
4) If the analyzer includes Ca
2+
measurement.
5) If the analyzer includes Na
+
and Glucose measurements.
Calculated
versus
estimated
parameters
Electrolyte
parameters