3. Optical measuring principles ABL800 FLEX Reference Manual
Measurement and corrections, Continued
Bilirubin
(continued)
Hct(calc)
g/dL
tHb=×
00301.
c
For further details on Hct(calc) please refer to Interference Tests and the
explanation of MCHC (Mean Corpuscular Hemoglobin Concentration) in chapter
5 in this manual.
Restrictions
The following parameters will not be calculated:
Parameter Is not calculated if…
sO
2
, FCOHb, FMetHb,
FHHb
ceHb = cHHb + cO
2
Hb< 0.75 mmol/L;
ctHb< 1 mmol/L
ctBil ctHb > 15.5 mmol/L
The following conditions are required to exclude HbF interference:
Parameter or Feature Requirement
ceHb > 3 mmol/L
FCOHb < 15 %
FMetHb < 10 %
“HbF correction" has not
been activated
If ctHb < 5 mmol/L, cO
2
HbF should be more than 1
mmol/L.
If ctHb > 5 mmol/L, cO
2
HbF/ctHb should be more
than 0.2.
“HbF correction" has
been activated
No lower limit value for cO
2
HbF is required, i.e.
even adult blood samples will be corrected for HbF.
It may be of value when analyzing blood samples
from newborns who received adult blood transfusion.
In these cases FHbF can be lower than 20 % and
significant deviations of oximetry parameters and
bilirubin can occur.
HbF suppression has
been activated
The FHbF value is displayed by the ABL835/30
FLEX.
Message “HbF detected” is displayed on the other
analyzer versions with the oximetry module
installed.
sO
2
<50 % or
ctHb<5 mmol/L
Message “FHbF measurement is not possible” is
displayed by the ABL835/30 FLEX if a HbF
suppression has been activated.
Continued on next page
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