SNOMED CT Editorial Advisory Group

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Inactivation ReasonAssociation TypeDescription

Meaning unknown

 Meaning Unknown

No

alternative required

Additional notes:

Examples:

Semantic meaning the same but FSN different:

235998001 Perinephric abscess (disorder) - inactivated
SAME_AS
80640009 Perirenal abscess (disorder)

Both concepts had an effective date of 2002-01-31 and so the decision was based on current clinical usage and the retained concept already had a synonym of Perinephric abscess.

Identical FSN but different semantic tag:

145857006 Soft tissue X-ray abnormal (situation) - inactivated
SAME_AS
168711005 Soft tissue X-ray abnormal (finding)

Managing incoming historical associations:

The intention is that this functionality will be seamlessly integrated into the tooling so as to present to the user the appropriate updated historically association to be allocated.

association required

The inactivation reason “Meaning Unknown” explicitly states that the meaning of the inactivated concept (A) cannot, in the judgment of the author/editor be determined and therefore no historical association should be provided.

Guidance
  • Annotation
    Additional notes on why this concept was considered not to represent a known clinical phenomenon.
  • Dropdown list (Where no replacement is appropriate)
    As the concept has no defined clinical meaning choose the statement "No suitable replacement concept identified" from the dropdown list.

  • Additional notes

    • This reason for inactivation is added for completeness and it is likely that there will be few concepts that will legitimately be considered as falling within its remit. 
    • Using the SCT term as a search term in PubMed may return some matches that give an indication of meaning and a return of few recent or no matches would provide some support for the use of this reason for inactivation.
    • Consider consulting domain experts to establish whether the concept to be inactivated is or is not considered to have clinical meaning within their sphere of practice. Use the sub and supertypes to identify the domain to consult.

Example

Panel
titleInherited ICD-9 concept

Inactivate concept:

  • Concept
    t194964003 |Milk spots of pericardium (disorder)|

  • Dropdown list (Where no replacement is appropriate)
    No suitable replacement concept identified

  • Annotation:
    This concept has been inherited from ICD-9 via Read Codes. Some sources recognize it as a normal morphology, others as an abnormal morphology. So, as a disease entity, nobody seems to know what it means or what the case definition is.

Resolving sequences of Historical Associations

No historical association is provided.Note: Once MOVED_TO the NRC we (SNOMED International) have no knowledge of what has happened to BIntEd