Roche cobas b 123 - BE Act; Hct(C); Mchc

Roche Diagnostics
108 Instructions for Use · Version 13.0
4 Theoretical foundations cobas b 123 POC system
Parameters and calculations
Hct(c)
Hct as a function of tHb.
[8]
Unit: [ - ]
Equation 4-39
Default value of Hb factor, F = 3.00 (F = 100/MCHC [g/dL])
[9]
Input range: 2.70–3.30. This corresponds to an MCHC of 30.3 g/dL to 37 g/dL (=
reference range for adults).
[8]
q
Only measured tHb is allowed.
MCHC
Mean corpuscular hemoglobin concentration.
[8]
Units: [g (Hb)/dL (Ery)]
Equation 4-40
Only displayed as a calculated value if both values are measured.
BO
2
Oxygen capacity.
[1]
Unit: [vol%]
Equation 4-41
If SulfHb is not measured, SulfHb = 0.
BE
act
Base deviation at actual oxygen saturation.
[2]
q
To calculate BE
act
, you have to define age as an input value.
Unit: [mmol/L]
100
F
tHbHct(c) ⋅=
100
Hct
tHb
MCHC ⋅=
()
39.1
100
SulfHbMetHbCOHb
1tHbBO
2
⋅
»
¼
º
«
¬
ª
−−
−⋅=
()( )()
¸
¹
·
¨
©
§
−⋅⋅−
−+−−⋅+⋅⋅⋅
−
100
12.0
]26.244.75.963.1[
2
3
O
tHb
HCOpHtHbtHb0.0143-1=BE
act
S
c