The terminology server will accept CTU expressions matching the following pattern:
[[+ (<
404684003 |Clinical finding|
) @finding]]:
272741003 |Laterality| = [[+ (< 182353008 |Side| ) @side]]
272741003 |Laterality| = [[+ (< 182353008 |Side| ) @side]]
The transformation of expressions following this pattern will include the following steps:
Copy the defining properties and role groups of the focus concept (as present in the NNF) to the classifiable form expression
- Replace the value of the |Finding site| attribute with a nested expression:
From:
@finding.
363698007 |Finding site|
= @bodySite
To: 363698007 |Finding site| = (@bodySite: |Laterality| = [[+ @side]] )
Important Notes
The terminology server will only accept expressions complying to this pattern if the focus concept of the CTU expression has the following characteristics:
- The focus concept
- includes only one role group with a |Finding site| attribute OR
- includes two or more role groups with a |Finding site| attribute WHERE
- the value of the finding site attribute in each role group is the same concept
- includes no attributes with values that are already lateralized anatomical structures (ie values whose own definitions already include a value for the 272741003|Laterality| attribute)
- The value of the finding site attribute is a member of the
723264001
|
Lateralizable body structure reference set|
- being a member of this refset means that the associated body structure is lateralizable, and does not already state a laterality other than 182353008 |Side|
Transformation of bilateral findings
When applying the concept 51440002 | Right and left| as the value for the 272741003 | Laterality| attribute, the transformation should be done in accordance with the modeling applied to the content in the International Edition of SNOMED CT.
This means that the transformation steps described above should be applied twice; one for each lateral half, as illustrated in the example below.
| CTU | Classifiable form |
|---|---|
Examples
Table 5.3.2.4-1: Examples of CTU expressions and their evaluation at level 1
| CTU expression | Accept/reject | Notes | Classifiable form |
|---|---|---|---|
| Reject | The modeling of |Acute pain| does not contain a |Finding site| attribute | N/A | |
| Reject | The value of the |Finding site| attribute (i.e. 818983003 |Abdomen|) is not lateralizable | N/A | |
| Accept | The value of the |Finding site| attribute (i.e. 117590005 |Ear structure|) is lateralizable | ||
| Reject | The focus concept includes two groups with a |Finding site| attribute in each. The values of the |Finding site| attribute are not the same concept not do they subsume each other | N/A | |
| Reject | The focus concept includes two groups with a |Finding site| attribute in each. The values of the |Finding site| attribute are not the same concept and one of the |Finding site| values is already lateralized while the other is not lateralizable. | N/A | |
288228002 |Myalgia/myositis - forearm| : 272741003 |Laterality| = 7771000 |Left| 288228002 |Myalgia/myositis - forearm (finding)| | Reject | The focus concept includes two groups with a |Finding site| attribute in each. Both of the two |Finding site| attribute values of the focus concept are lateralizable The attribute values are not the same concept. | |
| Accept | The values of the two |Finding site| attributes of the focus concept is the same concept and this is lateralizable |
===
449702005 |Cellulitis and abscess of lower limb|
: { 363698007 |Finding site| = ( 61685007 |Lower limb structure| : 272741003 |Laterality| = 7771000 |Left| ), 116676008 |Associated morphology| = 385627004 |Cellulitis| } { 363698007 |Finding site| = ( 61685007 |Lower limb structure| : 272741003 |Laterality| = 7771000 |Left| ), 116676008 |Associated morphology| = 44132006 |Abscess| } |
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