RADIOMETER ABL800 FLEX, Reference Manual

Page: 169 / 206

6. Parameters ABL800 FLEX Reference Manual
List of equations,
Continued
p50(T)
(continued)
Description See…
P = ODC(S,A,
T
) Eq. 47
( )
S
=
× − +
0 5 1 .
F F F
F
COHb - MetHb COHb
1- MetHb
Eq. 46.11
( )
0 . 37
) (
pH
04 . 1 a
− × × − =
T
T
A
∂
∂
( )
∂
∂
pH
pH
( )
. . ( )
T
= − × − × × − − −
146 10 6 5 10 37 7 40
2 3
.
T
= patient temperature in
o
C (keyed-in)
Eq. 21
:
p50(st)
p
50 is calculated for pH = 7.40,
p
CO
2
= 5.33 kPa,
F
COHb = 0,
F
MetHb = 0,
F
HbF
= 0.
The ODC is determined as described in equations 46 - 47 in the section
Oxyhemoglobin Dissociation Curve
, see equation 47.
p
50(st) = ODC(S,A,
T
)
where
Description See…
S = 0.5 Eq. 46.11
A = a6 corresponds to pH = 7.40,
p
CO
2
= 5.33 kPa,
F
COHb = 0,
F
MetHb = 0,
F
HbF = 0
Eq. 46.13
T
= 37.0
o
C
pO
2
(A-a) Eq. 22
:
p p p
O (A a) = O (A) - O (a)
2 2
−
2
T
2
The calculation requires entering the sample type as “Arterial” or “Capillary”.
Eq. 23
:
pO
2
(A-a,T)
p T p T p
O (A a, ) = O (A, ) O (a, )
2 2
− −
The calculation requires entering the sample type as “Arterial” or “Capillary”.
Continued on next page
6-32