ABL90 FLEX reference manual 8. Parameters
8-33
Eq. 38 [8]:
The ODC is determined as described in equations 46-47 in the section
Oxyhemoglobin Dissociation Curve further in this chapter.
x
2i
2.3
Q
tO (a) tc
Eq. Description See…
38.1
i2,i2
t tHb 1- COHb- MetHb O 0.0105 O (5)cFF s p
38.2 pO
2
(5) = 5.00 kPa
38.3 S = ODC(P,A,T)
38.4
2
2,i
COHb
O(5) 1
O1COHbMetHb
F
Pp
sFF
Eq. 46.9
38.5
2,i
S1 MetHb COHb
O
1- COHb- MetHb
FF
s
FF
Eq.
46.12
38.6 A = a
38.7 T = 37.0 °C
ctO
2
(a) is determined as described in equation 27.
Q
x
cannot be calculated on the basis of a default ctHb value.
Q
x
can only be calculated if the measured sO
2
(a)
0.97.
The calculation requires entering the sample type as "Arterial" or "Capillary".
Eq. 39:
The ODC is determined as described in equation 46 (points I and III). See the
section Oxyhemoglobin dissociation curve (ODC) further in this chapter.
2
S 1 MetHb COHb
O
1- COHb- MetHb
FF
s
FF
where
Description See…
S = ODC(P,A,T)
2
2
2
OCOHb
PO
O(1 COHb MetHb)
pF
p
sFF
Eq. 46.9
A = a
T = 37.0 °C
Eq. 40:
22
OHb O 1 COHb MetHbFs FF
If sO
2
is not measured, it will be calculated from equation 39.
If dyshemoglobins (FCOHb, FMetHb) are not known, they are set to the default
values.
Q
x
sO
2
FO
2
Hb