RADIOMETER ABL90 FLEX - Ctco (P)

8. Parameters ABL90 FLEX reference manual
8-24
Eq. 5 [24]:
-
3
Base(B) (1 0.014 tHb)( HCO (P) 24.8 (1.43 tHb 7.7)(pH 7.4))ccc c    
NOTICE: The formula is different from previous Radiometer analyzers. The
calculation is done in accordance with NCCLS (CLSI)-approved guidelines [24].
However, since it is assumed that the previous method [14] is a better model,
the previous range checks are retained (no values displayed outside ±50
mmol/L and values tagged with "?" outside the range of ±30 mmol/L).
The change corresponds to less than 0.6 mmol/L in the reference ranges for pH,
pCO
2
and ctHb.
Eq. 6 [4]:
)O1(tHb3062.0Base(B)ox)Base(B,
2
sccc 
If ctHb is not measured or keyed in, the default value will be used.
If sO
2
is not measured, it will be calculated from equation 39.
Eq. 7 [24]:
-
3
Base(Ecf) HCO (P) 24.8 16.2 (pH 7.4)cc 
See NOTICE in Eq. 5
Eq. 8:
cBase(Ecf,ox) = cBase(Ecf) – 0.3062 × 3 ×(1 – sO
2
)
Eq. 9 [4,14]:


-
3
HCO (P,st) 24.47 0.919 Z+Z a' Z-8c 
where
Eq. Description
9.1
-3 4
a'=4.04 10 4.25 10 tHbc

 
9.2


2
Base(B)-0.3062 tHb 1- OZc c s
Eq. 10 [4,5]:
-
223
tCO (P) 0.23 CO HCO (P)cpc 
cBase(B)
cBase(B,ox)
cBase(Ecf)
cBase(Ecf,ox)
cHCO
3
–
(P,st)
ctCO
2
(P)