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SNOMED CT Clinical concepts
cover disorders, findings, procedures, body structures, pharmacy
products, and others that encompass all of healthcare
SNOMED CT size
over 300,000 active concepts
Main SNOMED CT Components
* concepts
* descriptions
* relationships
,derivative works in SNOMED CT
* reference sets (RefSets)
* cross maps
* other resources
concepts
basic unit of SNOMED CT and defined as unique knowledge created
by a unique combination of characteristics
Concepts structure
according to logic-based representation of meanings. Each code is
represented by a node in the graph, and each relationship is
represented by an arrow
concept identifiers
string of digits with a minimum length of 6 digits and a maximum length
of 18 digits, most commonly 8 or 9 digits.
THese do not have embedded meaning or digit restrictions, even
when the knowledge of a concept changes, this number string does
not
, descriptions
link appropriate human-readable terms to concepts. They are the
terms or text for the concept. Each concept can have several,
each representing
alternative text that describes the same clinical idea
description identifier
each description is assigned a unique number, and is always
attached to a specific concept. There may be varying descriptions for
each concept, and each gets it's own number
Relationships
These link each concept to other concepts with a related
meaning. They provide formal definitions and other
characteristics of the concept. Each SNOMED CT concept has at
least 1 to another concept