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Clinical data which is stored using SNOMED CT will use SNOMED CT concept identifiers. SNOMED CT Identifiers are represented as a string consisting of between 6 and 18 digits. Further detail can be found in the Technical Implementation Guide: http://snomed.org/tigRelease File Specification: SNOMED CT Identifiers.

In most cases, the term selected by the user is also stored. The structural representation of stored clinical information is important. This must store similar information consistently, and the storage design must support effective querying.

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• Search and entry of single codes
  • Optimized design of a search tool for effective use with SNOMED CT is addressed in the Search and Data Entry Guide. This is currently available under Public Draft Documentation in the SNOMED CT Document Library at http://snomed.org/doc.
• Clinical data entry interfaces comprising numerous data items, including selection from short pick lists, and selectable singe items (check boxes).
  • Data entry interfaces have discrete items or lists of items from SNOMED CT 'bound' to a field. An example would be the binding of a single SNOMED CT Concept to a checkbox, so that when checked the SNOMED CT Identifier for the concept is stored in the clinical record.
  • Pick list can be configured by 'binding' to a SNOMED CT subset, or by enumerating the members of the pick list within the interface design.
• The encoding of free text data entry using SNOMED CT, for validation by a user
  • Using Natural Language Processing tools which work with SNOMED CT
• The use of images as a way of selecting coded entries e.g. anatomical images
  • This is a variation in which SNOMED CT is bound to regions of an image, rather than a coded or text based field

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Transition to the use of SNOMED CT for clinical records will require, in some cases, re-development of the data processing to populate the reports. However, in many cases SNOMED CT will enhance previous reporting capabilities.

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