COULTER HmX Hematology Analyzer, Справочное руководство

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PN 4237523A GLOSSARY-5
GLOSSARY
Mode - 1) The way you choose to run a sample: closed vial (primary mode) or open vial
(secondary mode). 2) The number (or set of numbers) that occur most frequently as shown
by histogram peaks.
Mode-to-Mode Matching - Agreement among patient results in open- and closed-vial modes.
See Chapter 4 for specifics.
mW - Milliwatt, a unit of power equal to 0.001 watt.
N or n - Number.
NCCLS - National Committee for Clinical Laboratory Standards.
NEW CAL FACTOR - Values the system calculates as you go through the calibration
procedure that makes mean values equal the reference values.
nm - Nanometer, a unit of linear measurement, equal to 10
-9
meter.
o.d. - Outer diameter.
OLD CAL FACTOR - Values the system has been using and still is using as you go through
the calibration procedure.
Opacity - For white blood cells analyzed in a flow cell using high-frequency measurement.
Subtracting the volume measurement from the conductivity measurement yields cell opacity.
Outlier - Control results that fall outside the expected or established range.
Parameters - Components of blood that the instrument measures and reports.
Parity - Methods of detecting errors in data handling. The computer generates a parity bit
such that the sum of the bits and the parity bit are odd or even for each data word.
Patient Population - A large number of patient sample results for
%
Analysis, used to give
fairly consistent average results for each of the three red blood cell indices: MCV, MCH, and
MCHC.
pg - Picogram, a unit of gravimetric measurement.
psi - Pounds per square inch, a unit of pressure measurements.
Precision - Ability of the instrument to reproduce similar results when a sample is run
repeatedly. Precision of the instrument is CV based on at least 31 replicate determinations of
the same sample. Precision of the closeness of test results when repeated analyses of the same
material are performed. Also called reproducibility.
Primary Mode - Closed-vial sampling mode in the instrument.
Purge - An option that clears clogs and bubbles from apertures and flow cell.
QC (Quality Control) - A comprehensive set of procedures your laboratory sets up to ensure
that the instrument is working accurately and precisely.