RADIOMETER ABL90 FLEX User Manual

8. Parameters ABL90 FLEX reference manual
8-32
Eq. 35 [5,16]:
1
22
22
tO (a, )- tO (v, )
Shunt( )= 1
tO (A, )- tO (a, )
cTcT
FT
cTcT





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

222
2
tO(A,) O() O(A,)
tHb 1- COHb- MetHb O (A, )
cT TpT
cFF sT
 
 
35.3
  
2
-2 4
-1.15 10 -37.0 2.1 10 37.0
2
O ( ) 0.0105e
TT
T 



  





35.4 pO
2
(A,T) is calculated from equation 16
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

pH
A a 1.04 37.0
()
T
T

   

35.9 T = patient temperature (keyed-in)
35.10



    

23
pH
1.47 10 6.5 10 pH(37) 7.40
()T
If sO
2
(a) > 0.97, the default p50(st) (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 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.
Eq. 36:
22
2
O(A) O(a)
RI=
O(a)
pp
p

The calculation requires entering the sample type as "Arterial" or "Capillary".
Eq. 37:
22
2
O(A, ) O(a, )
RI( )=
O(a, )
pTpT
T
pT

The calculation requires entering the sample type as "Arterial" or "Capillary".
FShunt(T)
RI
RI(T)

RADIOMETER ABL90 FLEX Specifications

General

Brand	RADIOMETER
Model	ABL90 FLEX
Category	Measuring Instruments
Language	English