RADIOMETER ABL800 FLEX, Reference Manual

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ABL800 FLEX Reference Manual 6. Parameters
List of equations,
Continued
ctCO
2
(B) Eq. 11
[5]:
( )
[ ]
⎟
⎠
⎞
⎜
⎝
⎛ −
× +
× × × × =
−
−
0 . 21
tHb
1 ) P ( tCO
10 + 1 tHb CO 10 286 . 9 ) B ( tCO
2
K pH
2
3
2
Ery Ery
c
c
c p c
p
where
Eq. Description
9.1
( ) ( )
pH pH -7.40 O
Ery 2
= + × + × −
7 19 0 77 0 035 1 . . .
s
9.2
( )
[ ]
pK log 1+10
Ery
pH O
Ery 2
= −
− − ×
6125
7 84 0 06
.
. .
s
Eq. 12
[14]:
pH(st)
pH(st): see equations 5.3 - 5.5.
Eq. 13
[15]:
Hct
Hct = 0.0485
×
c
tHb + 8.3
×
10
-3
Hct cannot be calculated on the basis of a default
c
tHb value.
pO
2
(T)
Eq. 14
[16,17]:
The standard Oxygen Dissociation Curve (ODC) is used (i.e.
p
50(st) = 3.578 kPa) at
actual values of pH,
p
CO
2
,
F
COHb,
F
MetHb,
F
HbF (see equations 46 - 47 in the
section
Oxyhemoglobin Dissociation Curve
).
p
O
2
(
T
) is calculated by a numerical method using:
( )
t ( ) tHb 1- COHb - MetHb O O O
i 2,i 2 2,i
T c F F s T T p T
= × × + ×
( ) ( ) ( )
α
where
Eq. Description See…
14.1
S = ODC(P,A,
T
) Eq. 47
14.2
( )
s T
F F
O ( ) =
S 1- MetHb COHb
1- COHb - MetHb
2,i
× −
F F
Eq. 46.12
14.3
(
)
p T
F
s T F F
O ( ) =
P
COHb
O ( ) COHb MetHb
2,i
2
1
1
,
i
+
× − −
Eq. 46.10
Continued on next page
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