System Method Information: Expected Values; System Method Information: Performance Characteristics - Siemens ADVIA 2120 Operator's Manual

System Method Information: Expected Values

Ranges of expected values can vary depending on age, sex, diet, location, etc;
therefore, it is recommended that each laboratory establish its own range of
expected values.

System Method Information: Performance Characteristics

These topics provide technical information related to method performance
characteristics, including imprecision, correlation data, analytical range, and
carryover.
A description of each statistical parameter and the protocol followed to compute
that parameter are as follows:
Imprecision
Imprecision is defined as the degree of variability among repeated measurements
of the same sample.
Within-run imprecision refers to the reproducibility of the method when samples
are assayed within a single run.
The imprecision values for each method, described on each of their respective
Method Sheets, are point estimates of average imprecision that can be expected
on the system. Because this is a point estimate, any single system tested with a
similar protocol could yield a different estimate of imprecision and yet not be
significantly different from the published average imprecision.
Correlation Data
Correlation data were determined using human whole blood samples by
comparing the performance of the ADVIA 120 Hematology System with the
performance of a reference method or a comparative system, where applicable.
Regression statistics were computed using a protocol similar to that
recommended in the CLSI Document M29-A3, Protection of Laboratory
Workers from Occupationally Acquired Infections; Approved Guideline - Third
Edition. 2005.
Regression data in each method indicate the linear least squares fit between the
ADVIA 120 Hematology System (y) and the comparative system/method (x),
unless noted otherwise.
Carryover
This topic lists the sample carryover for the ADVIA 120 Hematology System.
Analytical Range
This topic describes the concentration range across which acceptable results can
be obtained from the method.
Some specimens may exceed the range of the method and produce error flags or
messages.
Regulatory Information 9-17