RADIOMETER ABL90 FLEX - Page 14

Contents ABL90 FLEX reference manual
Measuring sequence..................................................................5-29
Calculations.............................................................................5-29
Calibration of the pO
2
sensor .............................................................5-30
Introduction.............................................................................5-30
Sensitivity ...............................................................................5-30
Status.....................................................................................5-30
Measurement - pO
2
..........................................................................5-31
Checks....................................................................................5-31
Metabolite sensors ...........................................................................5-32
Construction of the metabolite sensors................................................5-33
Basic description.......................................................................5-33
Diagram..................................................................................5-33
Parts and description.................................................................5-33
Zero current ............................................................................5-33
Calibration of the metabolite sensors ..................................................5-34
Sensitivity ...............................................................................5-34
Measurement – metabolites...............................................................5-35
Measurement...........................................................................5-35
Checks....................................................................................5-35
Measuring principle of the metabolite sensors ......................................5-36
Amperometric measuring principle ..............................................5-36
Electrode chain.........................................................................5-36
Parts and functions ...................................................................5-36
Measuring process ....................................................................5-37
ctHb and derivates ..........................................................................5-38
General information..........................................................................5-39
Measured parameters................................................................5-39
Construction ............................................................................5-39
Measurement cycle ...................................................................5-40
Lambert-Beer's law...................................................................5-40
Absorbance..............................................................................5-41
Total absorbance ......................................................................5-41
Continuous spectrum ................................................................5-41
Spectrum examples ..................................................................5-42
Determining concentrations........................................................5-42
Matrix of constants ...................................................................5-43
Calibration of the optical system ........................................................5-44
Calibration materials.................................................................5-44
Zero point ...............................................................................5-44
Cuvette path length ..................................................................5-44
tHb calibration frequency...........................................................5-44
Correcting for interferences ...............................................................5-45
HbF versus HbA........................................................................5-45
Deviation of results...................................................................5-45
Detecting HbF ..........................................................................5-45
Correcting for HbF ....................................................................5-45
Repressing spectra....................................................................5-45
Residual spectrum ....................................................................5-46
Measurement and corrections ............................................................5-47
Oximetry parameters ................................................................5-47
Bilirubin ..................................................................................5-47
Restrictions..............................................................................5-48
Corrections for ctHb..................................................................5-49
Corrections for ctBil ..................................................................5-49
References......................................................................................5-50
6. User-defined corrections..................................................................6-1