RADIOMETER ABL800 FLEX, Справочное руководство

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6. Parameters ABL800 FLEX Reference Manual
List of equations,
Continued
ctO
2
Eq. 27
[5]:
( )
c p s F F
tO O O O COHb MetHb tHb
2 2 2 2
= × + × − − × α
1
c
t
α
O
2
is the concentrational solubility coefficient for O
2
in blood (here set to
9.83
x
10
−
3
mmolL
–1
kPa
–1
at 37
o
C [5,19].
c
tO
2
cannot be calculated on the basis of a default
c
tHb value.
Eq. 28
:
ctO
2
(a
−
v
–
)
c
tO
2
(a
−
v– ) =
c
tO
2
(a) –
c
tO
2
(v– )
where
c
tO
2
(a) and
c
tO
2
(v– ) are calculated from equation 27 for arterial and mixed
venous blood, respectively. The calculation requires two measurements.
Eq. 29
[7]:
BO
2
( )
BO c F F
2
1
= × − −
tHb COHb MetHb
B
O
2
cannot be calculated on the basis of a default
c
tHb value.
Eq. 30
[8]:
ctO
2
(x)
(or c
x
)
The ODC is determined, as described in equations 46 - 47 in the section
Oxyhemoglobin Dissociation Curve
.
c c
tO tO
2 2
( ) ( ) x a
i
= −
where
Eq. Description See…
30.1
( )
t tHb
i
= × − ×
+ × × −
c F F s
p
1
9 83 10
3
COHb - MetHb O
O (5)
2,i
2
.
+
30.2 p
O
2
(5) = 5.00 kPa
30.3
S = ODC(P,A,
T
) Eq. 47
30.4
( )
P
= × +
× − −
⎡
⎣
⎢
⎢
⎤
⎦
⎥
⎥
p
F
s F F
O (5)
COHb
O COHb MetH
2
2,i
1
1 b
Eq. 46.9
30.5
( )
( )
s
F F
F F
O
MetHb COHb
COHb MetHb
2,i
=
× − −
− −
S
1
1
Eq. 46.12
30.6
A = a
30.7 T
= 37.0
o
C
Continued on next page
6-34