RADIOMETER ABL90 FLEX User Manual

ABL90 FLEX reference manual 8. Parameters
8-25
Eq. 11 [5]:

Ery Ery
pH K
3
22
2
tCO (B) 9.286 10 CO tHb 1+10
tHb
tCO (P) 1
21.0
p
cpc
c
c













where
Eq. Description
11.1




Ery 2
pH 7.19 0.77 pH-7.40 0.035 1 Os  
11.2

Ery 2
pH 7.84 0.06 O
Ery
pK 6.095 log 1+10
s







Eq. 12 [14]:
pH(st): see equations 5.3-5.5 below.
Eq. Description
5.3
22 2
5.33 pH(Hb) pH
pH(st) pH log
CO lo
g
CO (Hb) lo
g
(7.5006 CO )pp p
 

 
 
 

 
5.4

0.16169 tHb
2
pH(Hb) 4.06 10 tHb+5.98-1.92 10
c
c


 
5.5

0.15158 tHb
2
2
log CO (Hb) 1.7674 10 tHb+3.4046+2.12 10
c
pc


  
Eq. 13 [15]:
Hct = 0.04939ctHb
Hct cannot be calculated on the basis of a default ctHb value.
NOTICE: The formula is different from the formula used in previous Radiometer
analyzers. The previous formula Hct = 0.0485ctHb+8.310
-3
was changed to
ensure that Hct=0 when ctHb=0. The slope was adjusted to make Hct identical
for the two formulas when ctHb=9.3087 mmol/L.
The change corresponds to 1% in the ctHb range 6.3-12.3.
Eq. 14 [16,17]:
The standard Oxygen Dissociation Curve (ODC) is used (i.e. p50(st) = 3.578
kPa) at actual values of pH, pCO
2
, FCOHb, FMetHb, FHbF (see equations 46-47
in the section Oxyhemoglobin dissociation curve (ODC) further in this chapter).
pO
2
(T) is calculated by a numerical method using:


i 2,i 2 2,i
t( ) tHb 1- COHb- MetHb O ( ) O ( ) O ( )cFF sTTpT     T
ctCO
2
(B)
pH(st)
Hct
pO
2
(T)

RADIOMETER ABL90 FLEX Specifications

General

Brand	RADIOMETER
Model	ABL90 FLEX
Category	Measuring Instruments
Language	English