Overview
Previously, SNOMED CT represented ions and electrolytes as separate concepts. Although the two terms are subtly different, there is considerable overlap in their definitions, and they seem to be used interchangeably in medicine. The Substances Redesign Project Group has considered this issue and determined the following:
- Ions should be modeled as child concepts of the substance.
- A second parent (in addition to X (substance)), that indicates the concept is an ionized substance should be modeled.
- Use a descendant of 86355000 |Electrolyte (substance)| as the additional parent. (86355000 |Electrolyte (substance)| and its children are used in LOINC term expression associations.)
- Non-Ionized/Non-Ionised substances should not be created.
Modeling (stated view)
| Parent concepts | Most distal appropriate descendant of 86355000 | Electrolyte (substance)| Most distal appropriate descendant of 312413002 |Substance categorized structurally (substance)| |
|---|---|
| Semantic tag | (substance) |
| Definition status | 900000000000074008 |Necessary but not sufficient concept definition status (core metadata concept)| |
Attribute | none |
Naming Guidelines
FSN | Pattern:
For example,
|
|---|---|
Preferred Term | Pattern:
For example,
|
Synonyms | Pattern:"Ionized X" and "X electrolyte". For example,
|
Exemplar
The following illustrates the Stated and Inferred view
The following illustrates the hierarchy view
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