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Comment: Published by Scroll Versions from space SCTC and version 2.4

Fixed Issue

An equivalency error between has been discovered in the March 2020 SNOMED CT Canadian Edition release and a new March 2020 CA Edition package has been updated and published on the Terminology Gateway.

Two concepts are involved: 22841000087100 and 22921000087102 where the defining relationship Procedure site – Direct: Upper limb structure (body structure) is the same for both concepts.

The error is characterized by a misalignment between the Fully Specified Name description for Computed tomography of abdomen, pelvis and bilateral upper limbs with contrast (procedure) and its value for Procedure site - Direct (attribute), which should have been modeled as:

  • Procedure site - Direct → Structure of left upper limb
  • Procedure site - Direct → Structure of right upper limb

The detailed information can be found on this InfoRMS Ticket SCT-9622

 

Known Issues

Known

Issues are

issues include content or technical issues where the root cause is understood and the resolution has been discussed and agreed to but

has

have yet to be implemented. This can be due to a number of reasons

, from

which include lack of capacity within the current

editing

editorial cycle

, to the

and risk of impact to the stability of SNOMED CT if the fix were to be deployed at that stage in the

Product

product lifecycle.

 

Terminology issues

A) Known Issues identified but will not be changed for the various reasons listed below:

Concepts Containing Conjunctions AND potential for the ambiguous concept

The following are known issues:

a. Concepts containing conjunctions AND/OR or OR that are potentially ambiguous:

When Editorial Guidelines were more « flexible » some « deviant » concepts were added to the CA Edition. These may be present in Communicable Disease and

CPAC Projects

Canadian Partnership Against Cancer (CPAC) projects/subsets. Since then, the

Editorial

editorial criteria have matured and these types of concepts will no longer be added to the CA Edition. The following « deviant » concepts will be kept in the CA Edition until they are no longer required.

Examples: 10741000087101|Malignant tumor of ovary and/or fallopian tube (disorder)| 

or 20721000087101|Meningitis or encephalitis (disorder)|

or 8141000087102|Anaphylaxis to previous dose or a constituent of this vaccine (situation)|

 


b. Duplicate ConceptsSome concepts were potentially duplicate concepts of concepts

There is the potential that CA Edition concepts duplicate existing concepts in the International Edition. 

Example:

 577191261000087109|Congenital rubella infection (disorder)| and 1857005|Congenital rubella syndrome (disorder)|

1251536003 |Sport medicine (qualifier value) | and 999484811000087108 |Sports medicine (qualifier value) |


c. Concepts missing definitions and concepts missing refinements

 

c. Concepts Missing Definitions and Concepts Missing Refinements

Infoway does not « fully model »

any of its Edition content. This is the reason why there may be some missing defining relationships that could better represent the meaning of a concept. The rationales for not modeling the CA Edition are:In the Terminology area where SNOMED International is reviewing the concept model and is re-designing the content, Infoway will wait until the International content is completed and stable before modeling its CA Edition content.

all concepts in the CA Edition because:

    • When submitted to SNOMED International, they will fully model when applicable.
    • International content must be completed and stable before the CA Edition content is modelled fully. 

             As a result, there may occasionally be missing defining relationships that could be added to better represent the full and unambiguous meaning of a concept through logical definition.


d. Incomplete coverage

Some concepts are

d. Incomplete Coverage

Some concepts were

missing and therefore there is incomplete content coverage.

Examples: 22231000087107|Structure of nail of all fingers (body structure)| is a child of 70327001|Structure of all fingers (body structure)|.

The concept 70327001|Structure of all fingers (body structure)| includes the following subtypes:

    • 362779006|All fingers (body structure)|
•
    • 22599004|Skin structure of all fingers (body structure)|
      o
          • 368364009|Entire skin of all fingers (body structure)|
      •
        • 88814004|Subcutaneous tissue structure of all fingers (body structure)|
          o
              • 368365005|Entire subcutaneous tissue of all fingers (body structure)|
          •
            • 22231000087107|Structure of nail of all fingers (body structure)|

                  It appears that a concept “Entire nail of all fingers” should also be created for completeness. 


          e. AntigenCode subset has unspecified content

             Many concepts (21) are products that should not be a member of this subset.

             Examples:

              • 7121000087107 |Men-C-ACYW-135 meningococcal conjugate A + C + Y + W-135 unspecified|
              • 871873006 |Men-ACYW-135 meningococcal A + C + Y + W-135 unspecified|  


                          f. Concepts with 2 FSNs

           

          Technical fixed issues

          • None

                                 We acknowledge that in the September 2023 release, there were concepts with 2 different FSNs.

                                    In principle, as per the SNOMED CT specification, it is possible to have one preferred FSN per language refset.

                                   When we usually reconcile the SNOMED CT CA content after promotion to SNOMED International, we ensure the CA FSN, when different from the International FSN, is superseded by the International FSN.

                                   We have identified this issue as requiring a correction that will be in scope for the next Canadian Edition planned for publication in February 2024.