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INTESTINAL INTUSSUSCEPTION

Duplicate and Hierarchy Problems

  • Roger Weeks; MBBS
  • Nov 6, 2016

Throughout SNOMED CT the persistent interrogator (am I alone?) can find numerous duplicate concepts and (sometimes related) hierarchy problems (usually of omission or wrong hierarchy) anywhere they care to look.


Throughout SNOMED CT the persistent interrogator
can find numerous duplicate concepts and hierarchy problems anywhere they care to look.

Today I found and examined the 'Intestinal intussusception' hierarchy shown below: (Occasionally I show the Read 2 code(s) first, then SNOMED CT code(s), then the concept term(s), and finally the CTV3 code(s))

example

Concepts (indented) missing from the SNOMED CT Intestinal intussusception hierarchy are shown with their parents below:

example

Now for the duplicate.

In the SCT hierarchy, a child of :
J500.|J500z|49723003|Intussusception of intestine|J500.|J500z
is:
J5002|197048002|Enteric intussusception|J5002

The definition of enteric is: 'Relating to the intestine'.
So 'Enteric intussusception' is identical to' Intestinal intussusception'


I represent this in my CORRECTED VERSION as:

J500.|J500z|J5002|49723003|197048002|Intussusception of intestine; Enteric intussusception|J500.|J500z|J5002

accommodating both terms.


Many duplicates should be apparent to IHTSDO, as examination of the other (i.e. 'non Is a') or 'other defining relationships' will often show exactly the same set of relationships.
In short:
'Intestinal structure', 'Intussusception' and 'Obstruction'. Only the 'Is a' is different showing the different hierarchy making Enteric intussusception a child of itself (!?).


ENTERIC
Focus (source) concept |Relationship type |Related (destination) concept
Enteric intussusception |Is a |Intussusception of intestine
Enteric intussusception |Finding site |Intestinal structure (body structure)
Enteric intussusception |Associated morphology |Intussusception (morphologic abnormality)
Enteric intussusception |Associated morphology |Obstruction (morphologic abnormality)


INTESTINAL
Focus (source) concept |Relationship type |Related (destination) concept
Intussusception of intestine |Is a |Mechanical ileus
Intussusception of intestine |Finding site |Intestinal structure (body structure)
Intussusception of intestine |Associated morphology |Intussusception (morphologic abnormality)
Intussusception of intestine |Associated morphology |Obstruction (morphologic abnormality)


To eliminate these problems I propose the addition of:

  1. a set of definitions (mine for 'enteric' is straight out of Stedman medical dictionary) for all terms and concepts used in clinical terminology;
  2. tools to examine and trace duplicate concepts by their relationship definitions.
  3. the completion of ongoing work on all concepts 'other defining relationships'
  4. re-examination of all hierarchies for errors and omissions and removal of 'silly' ones like the '55607006|Problem (finding)' hierarchy where the only common factor in the children of this odd set is that each concept contains the word 'problem'!
  5. would go a long way to improving SNOMED CT.


Comments

Work in progress

Roger Weeks

The aim of this blog is share my findings with the community. Uneasy at the lack of objective discussion of the issues around the uncritical adoption of SNOMED CT I am hoping to support the community by sharing my findings. As I am developing a comprehensive thesaurus of medical terms much of my focus, naturally, is on SNOMED CT. The bottom line is that SCT will be used in critical clinical systems and unless there is a rational dialogue about the issues much of the anticipated beneficial deliverables will not be met.

Blog & Comments

Roger Weeks

This is the first!

The aim of this blog is share my findings with the community. Uneasy at the lack of objective discussion of the issues around the uncritical adoption of SNOMED CT I am hoping to support the community by sharing my findings. As I am developing a comprehensive thesaurus of medical terms much of my focus, naturally, is on SNOMED CT. The bottom line is that SCT will be used in critical clinical systems and unless there is a rational dialogue about the issues much of the anticipated beneficial deliverables will not be met.

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More on Duplicates

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Dr Roger Weeks - roger@medicalintelligency.com

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Steve Mott - steve@medicalintelligency.com

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