ABL800 FLEX Reference Manual 5. Performance characteristics
Interference tests, Continued
Contribution to
imprecision
specifications
from HbF
correction
The process of HbF correction introduces additional noise compared to measure-
ment on adult samples. The following tables list the extra contribution which must
be added geometrically to the imprecision specifications for adult samples in order
to obtain the imprecision specifications for fetal samples (also for adult samples if
function “Correction for HbF levels less than 20 %” is activated).
SSS
fetal adult HbF
=+
22
; geometrical addition of imprecision
where S
fetal
is the calculated fetal imprecision; S
adult
is the corresponding adult
imprecision; S
HbF
is the extra contribution from HbF correction which is listed in
the following tables.
HbF correction contribution to 10 g/dL SAT100 fetal sample:
S
0
S
D
S
ABL
S
X
sO
2
% 0.15 0.20 0.19 0.31
FHHb % 0.14 0.19 0.19 0.30
FO
2
Hb % 0.01 0.01 0.01 0.01
FCOHb % 0.09 0.13 0.12 0.20
FMetHb % 0.05 0.06 0.06 0.10
HbF correction contribution to 15 g/dL SAT100 fetal sample:
S
0
S
D
S
ABL
S
X
sO
2
% 0.09 0.12 0.29 0.33
FHHb % 0.09 0.11 0.28 0.32
FO
2
Hb % 0.00 0.00 0.01 0.01
FCOHb % 0.06 0.07 0.18 0.21
FMetHb % 0.03 0.04 0.09 0.11
HbF correction contribution to 20 g/dL SAT100 fetal sample:
S
0
S
D
S
ABL
S
X
sO
2
% 0.09 0.12 0.20 0.25
FHHb % 0.09 0.11 0.19 0.25
FO
2
Hb % 0.00 0.00 0.01 0.01
FCOHb % 0.06 0.07 0.13 0.16
FMetHb % 0.03 0.04 0.06 0.08
Continued on next page
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