The Instrument Classification has been prepared in a very similar way to
the existing Reagent Classification. However, there are significant differences and
difficulties according to the unequivocalness of product allocation to specific groups and
subgroups. To achieve the utmost consent within the whole Diagnostic industry the team has
chosen the following procedure:
Level 1 - Categories: The team listed a majority
of the existing instruments by brand name and company according to their utilisation for
the individual reagent categories (Clinical Chemistry, Immunochemistry, etc.). In the case
of "multiple reagent category utilisation" of an instrument the primary field of
application was chosen (e.g.: Hitachi 911 can be used for Clinical Chemistry and
Immunoassay testing, but primary utilisation is as a Clinical Chemistry Instrument, or
DuPont ACAs primary application is Drugs and not Clinical Chemistry any more,
therefore it was grouped as Immunoassay Analyser).
Level 2 - Groups: As a next step within each
category the instruments were grouped according to the type of utilisation or specific
method (e.g. within the category Immunochemistry Instruments the groups are RIA Equipment,
Protein Analyser, Immunoassay Analyser, etc.). Here again the primary field of application
was preferred for grouping.
Level 3 - Subgroups: This level includes a mixture
of selection criteria for grouping, like: size, dedication, specific methods, degree
of automation, etc. Unfortunately, there are no distinct selection criteria available
which enable unambiguous product allocation without significant overlaps. For this reason
the individual instruments were grouped according to their "competitive
aptitude", which means what similar product of another company a customer could
choose to achieve the same results, as far as possible. After splitting the whole bunch of
instruments into most comparable clusters the most suitable name for the subgroups have
been adopted.
The EDMA-code for Instruments consists of three pairs of digits describing
the three different classification levels. The first two digits describe the Category,
the second two digits identify the Group within each category, the third
pair of digits relate to the Subgroup.
Within each subgroup there are instruments listed (grouped) by company and
instrument name which fit to the corresponding subgroup.
For example: 23 02 04 5 part differential high end Blood Cell Counter
Level 1 23 = Category....................Haematology Instruments
Level 2 02 = Group......................Blood Cell Counter
Level 3 04 = Subgroup..............5 part
differential high end Blood Cell Counter
Examples: 5 part differential high end Blood Cell Counter
Abbott CELL-DYN 3000
CELL-DYN 3500
CELL-DYN 4000
____________________________
Bayer H 1 E
H 2
H 3 RTC
H 3 RTX
____________________________
Coulter STKR
STKS
MAXM
etc.
____________________________
This system allows to uniquely identify each individual instrument and
rapidly find them in any listings, e.g. in statistical tables.