RADIOMETER ABL800 FLEX Reference Manual

ABL800 FLEX Reference Manual 6. Parameters
List of equations, Continued
Eq. 35 [5,16]:
FShunt(T)
FT
cTcT
cTcT
Shunt( ) =
tO (a, ) - tO (v, )
tO (A, ) - tO (a, )
22
22
1
1
+
⎡
⎣
⎢
⎤
⎦
⎥
−
where
ctO
2
(a,T): total oxygen in arterial blood at patient temperature
ctO
2
(A,T): total oxygen in alveolar blood at patient temperature
ctO
2
(v
–
,T): total oxygen in mixed venous blood at patient temperature
Eq. Description See…
35.1
ctO
2
(a,T) = ctO
2
calculated from equation 25 for arterial pO
2
and sO
2
values at 37
o
C.
35.2
( )
cT TpOT
cFF s
tO (A O A
tHb 1 - COHb - MetHb O (A,
22
2
,) () (,)
)T
=
×
+× ×
α
2
35.3
() ( )
[
]
α O
2
3
2 1 10 37 0
983 10
4
2
() .
..
T
T
=×
−
×× +××−
−
e
-1.15 10 -37.0
-2
T
35.4
pO
2
(A,T) is calculated from equation 15.
35.5
sO
2
(A,T) = S
35.6
S = ODC(P,A,T) Eq. 47
35.7
P = pO
2
(A,T)
35.8
( )
Aa
pH
=− × × −104 370.
()
.
∂
∂
T
T
35.9
T = patient temperature (keyed-in)
35.10
( )
∂
∂
pH
pH
()
..()
T
=× −× −
−−
146 10 65 10 37 740
23
.
If sO
2
(a) > 0.97, a keyed-in p50(st) will be used to determine the
ODC. If sO
2
(a) > 0.97 and no p50(st) has been keyed in, the
default value (3.578 kPa) will be used to determine the ODC.
35.11
ctO
2
(v
–
,T) = ctO
2
(v
–
) at 37
o
C is calculated from equation 27 for
mixed venous blood values of pO
2
and sO
2
. If sO
2
(v
–
) > 0.97, a
keyed-in p50(st) will be used to determine the ODC.
If sO
2
(v
–
)>0.97 and no p50(st) has been keyed in, the default
value (3.578 kPa) will be used to estimate the ODC. If no mixed
venous sample is measured, the FShunt(T) is estimated
assuming ctO
2
(a,T) – ctO
2
(v
–
,T) = 2.3 mmol/L in equation 35.
Continued on next page
6-37

RADIOMETER ABL800 FLEX Specifications

General

Brand	RADIOMETER
Model	ABL800 FLEX
Category	Measuring Instruments
Language	English