RADIOMETER ABL800 FLEX - Measurement and Corrections

ABL800 FLEX Reference Manual 3. Optical measuring principles
Measurement and corrections
Oximetry
parameters
The oximetry parameters are calculated as follows:
Parameter Equation
ctHb(meas)
= cO
2
Hb + cCOHb + cHHb + cMetHb
s
O
2
=
c
c
OHb
eHb
2
ceHb = cHHb + cO
2
Hb (effective hemoglobin)
FO
2
Hb
=
c
c
OHb
tHb
2
FCOHb
=
c
c
COHb
tHb
FHHb
=
c
c
HHb
tHb
FMetHb
=
c
c
MetHb
tHb
FHbF
=
c
c
HbF
tHb
where:
cO
2
Hb = concentration of oxyhemoglobin in the sample
cCOHb = concentration of carboxyhemoglobin in the sample
cHHb = concentration of deoxyhemoglobin in the sample
cMetHb = concentration of methemoglobin in the sample
cHbF = concentration of fetal hemoglobin in the sample
Bilirubin
Bilirubin is calculated as follows:
Hct(calc)1
tBil(B)
tBil(P)
−
=
c
c
where:
ctBil(P) = concentration of total bilirubin in plasma
ctBil(B) = concentration of diluted plasma bilirubin after sample
hemolyzation
Hct(calc) = calculated hematocrit (a fraction).
Continued on next page
3-9