Copy of 2024-11-13 - Laboratory Terminology Standards WG Meeting

Use of inheres_in for microbiology organism nucleic acid reporting 

Looked at examples of microbiology SARS-Cov2 observable entity concepts for reporting viral RNA presence in the SNOMED CT International Edition

Opinion is that the inheres_in is still superfluous and will not be relevant in a post-coordinated model of test + specimen

Farzaneh to take these back and discuss internally and decide on the use of inheres_in for these concepts

colour, appearance, identification

inheres_in  used for the property to describe the characteristic of an organism, cell or body structure - applicable to LOINC Ontology representations

Farzaneh to present examples to group at a future session

• Example 'basophils per hundred leukocytes'

• Percent property in the property hierarchy is not correct
• Property is fraction and percent is the unit

• UK modelling and proposed LOINC ontology modelling are the same (except for UK including inheres_in)

• LOINC mapping is number fraction

• Agreement from the NPU side, percent is the unit and can also be used for other property e.g. mass fraction

• Stan mentioned unit should be post-coordinated in LOINC (specified in information model)

• But cannot model 'per 100 entities' in SNOMED CT concept model so have to use the percent unit so this needs further discussion because 'per 100 cells' is more accurate representation than percent