RADIOMETER ABL800 FLEX Reference Manual

ABL800 FLEX Reference Manual 2. Amperometric measuring principles
Metabolite electrodes, Continued
Measurement
The glucose/lactate concentration in a sample is calculated from the following
equation:
Sens
(final)II(sample)
X(sample)
0
−
=c
where:
I(sample) = Current of the metabolite electrode measured on the
sample.
I
0
(final) = Extrapolated final zero current value of the metabolite
electrode at the time of the last sample updating.
Sens = Relative sensitivity of the metabolite electrode.
Corrections
The measured metabolite concentration is corrected for systematic deviations from
the reference method by the following equations:
Equation A:
L)(1951L)(1950
L195
X(sample)Acorr)X(sample,
µµ
µ
Acc +×=
and
Equation B:
cX(sample,corr)
micromode
= A
0,micromode
× cX(sample,corr)
195 µL
+
A
1,mocromode
where:
cX(sample) = uncorrected measured metabolite concentration from a sample
cX(sample,
corr)
= corrected measured metabolite concentration from a sample
A
0
= instrument-dependent correction factor
A
1
= instrument-dependent cut-off
When an additional correction is needed, equation A is first used together with the
constants for the 195 µL mode. Then the obtained results are put back into
equation B as cX(sample) and then treated again, using the constants for the
specific mode.
Note that subscript “195 µL” in the equations above is used for convenience sake
and stands for “FLEXMODE (no message)”, “FLEXMODE (message 874)”, and
“FLEXMODE (message 873)”.
Continued on next page
2-17

RADIOMETER ABL800 FLEX Specifications

General

Brand	RADIOMETER
Model	ABL800 FLEX
Category	Measuring Instruments
Language	English