RADIOMETER ABL800 FLEX Reference Manual

ABL800 FLEX Reference Manual 6. Parameters
List of equations
All definitions and equations are based on SI units. If 'T' for patient temperature is
not stated, the calculation is based on a temperature of 37.0 °C.
Units and
symbols
The following SI units are used:
concentration in mmol/L
temperature in °C
pressure in kPa
fractions (not %)
The following symbols are used in the equations:
log(x) = log
10
(x)
ln(x) = log
e
(x)
pH(T)
Eq. 1 [13]:
(
)
[]
[
]
pH( ) pH(37) pH(37)- -37TT=−+×0 0146 0 0065 7 40.. .
cH
+
(T)
Eq. 2:
()
cT
T
H( )=10
+
pH ( )9 −
Eq. 3 [4]:
pCO
2
(T)
(
)
[
]
pTp
T
CO CO (37) 10
22
-37
()
.
=×
×0 021
cHCO
3
–
(P)
Eq. 4 [5]:
(
)
cpHCO (P) CO 10
3
-
2
pH - pK
p
=× ×023.
where
(
)
[
]
8.7pH
p
10+1log125.6pK
−
−=
cHCO
3
–
(P) includes ions of hydrogen carbonate, carbonate, and carbamate in the
plasma.
cBase(B)
Eq. 5 [4,14]:
c
c
Base(B) = 0.5
8a'-0.919
a'
0.919 - 8a'
a'
HCO
a'
3
-
×
⎛
⎝
⎜
⎞
⎠
⎟
+×
⎛
⎝
⎜
⎞
⎠
⎟
−×
−
05 4
24 47 5 33
2
.
.(.)
Continued on next page
6-27

RADIOMETER ABL800 FLEX Specifications

General

Brand	RADIOMETER
Model	ABL800 FLEX
Category	Measuring Instruments
Language	English