Roche cobas b 123 - Ch T; Pao; Pco; Ph T

Roche Diagnostics
106 Instructions for Use · Version 13.0
4 Theoretical foundations cobas b 123 POC system
Parameters and calculations
pH
t
Corrected pH value for patient temperatures other than 37 °C.
[1]
Equation 4-29
cH
t
Corrected hydrogen ion concentration for patient temperatures other than 37 °C.
[1]
Unit: [nmol/L]
Equation 4-30
PCO
2
t
Corrected CO
2
value for patient temperatures other than 37 °C.
[1]
Unit: [mmHg]
Equation 4-31
PO
2
t
Corrected O
2
value for patient temperatures other than 37 °C.
[1]
Unit: [mmHg]
Equation 4-32
PAO
2
t
Corrected alveolar oxygen partial pressure for patient temperatures other than
37 °C.
[6]
Unit: [mmHg]
Equation 4-33
where
7 0
0
pH pH pH t
t
= − + ⋅ − ⋅ −
[ . . ( . )] ( ) 0147 0065 4 37
)pH(9
t
FH
t
=10
−
P P CO CO
t
t
2 2
0 37
10
= ⋅
⋅ −
.019 ( )
() 37
30.21072.9
071.01049.5
88.3
9
88.3
11
10
−⋅
»
»
¼
º
«
«
¬
ª
+⋅⋅
+⋅⋅
−
−
⋅=
t
O
O
22
2
2
OO
P
P
t
PP
()
»
¼
º
«
¬
ª
¸
¹
·
¨
©
§
−
+⋅−⋅−=
R
IO1
IOACOIOOHO
2
2
t
22
t
2total
t
2
A
F
FPFPPP
ttt
PPPP
2
t
222
OAOotherwiseOAO =≤