Siemens Rapidlab 1200 - Page 140

4-10 Rapidlab 1200 Operator’s Guide: Quality Control
02087462 Rev. V
The mean value is defined as the sum of all results divided by the number of results,
according to the following formula:
• SD(R), standard deviation with RiliBÄK range checking defined according to the
following formula:
• SD(R) as a percentage, standard deviation as a percentage with range checking
defined according to the following formula:
• SD( ), standard deviation against the mean is defined according to the following
formula:
• CV, coefficient of variation is defined according to the following formula:
• N, number of samples included for these statistics.
NOTE: For RMSD and RMSD%, a minimum of 15 samples is required. If fewer than
15 samples are analyzed, the field is blank. For Standard Deviation and Coefficient of
Variation, a minimum of 5 samples is required. If fewer than 5 samples are analyzed,
the field is blank.
NOTE: If a sample is out of range it may skew QC Analysis results. To exclude a
sample you suspect is out of range, see Using the QC List Screen‚ page 4-7.
NOTE: Low and high AQC and RQC ranges are adjusted to adhere to the
RiliBÄK 2008 requirements that define deviation from target ranges.
NOTE: CO-ox fractions for FO
2
Hb, FCOHb, FMetHb, and FHHB are not adjusted.
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