SNOMED CT
SNOMED CT stands for Systematised Nomenclature of Medicine - Clinical Terms and is a common, standardised clinical coding language.
SNOMED CT is the most comprehensive and precise clinical health terminology product in the world, it includes:
- Diagnosis and procedures
 - Symptoms
 - Family history
 - Allergies
 - Assessment tools
 - Observations
 - Devices
 - Other content to support healthcare delivery
 
Vision Anywhere uses SNOMED CT to record data, this results in:
- Consistent recording and retrieval of information.
 - Advanced data analysis.
 - Real-time decision support.
 - Meaningful sharing of information.
 
SNOMED CT are built of three building blocks:
- Concepts - These are unique codes.
 - Relationships - These are the links between to other concepts.
 - Descriptions - These are the fully specified names and the synonyms, it is these you select from for recording purposes.
For example:

 
- The Tag displays after the Fully specified name (FSN) in brackets, this provides an indication of where in the SNOMED CT dictionary the Concept sits.
 - A Preferred Term is designated to the description that most healthcare professionals use for a specific disorder, but you can select any synonym you require.
 
Within SNOMED CT, Concepts are associated with other concepts using two different types of relationships:
- The is-a relationship which enables concepts to be part of a structured hierarchy that group “like” concepts together. Each concept has a relationship to at least one “parent” concept and as you go down the hierarchy concepts become more detailed and specific.
 - An attribute relationship can be used to further define each concept.
 
A Concept has is-a relationships, identifying what kind of concept it is, for example Clinical finding or procedure, and an attribute relationship which defines the particular concept, for example, for a procedure, it would include finding site, causative agent, laterality, method and many more.