New attributes that are added to the SNOMED CT concept model (or to a SNOMED CT extension) may require their value to be concrete. Concrete values include integers (e.g. 500), decimals (e.g. 2.75) and strings (e.g. "PANADOL").
The expression shown below uses both concept values and concrete values to represent a capsule that contains 500 mg of amoxicillin
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Please note that these examples are based on a hypothetical drug concept model, and is not intended to reflect any specific drug model. Attributes for which an identifier has not been assigned have been shown with an identifier of '111115'. |
. In this case, the dose form, the active ingredient, the basis of strength substance and the strength unit all use a concept as their value, while the strength magnitude is represented using a numeric value. The numeric value is indicated in the expression by the preceding '#' symbol (e.g. #500).
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27658006| |
amoxicillin has Has dose form| = 385049006| |
capsule { has Has active ingredient| = 372687004| |
amoxicillin 111115|has basis of strength| = (111115 |amoxicillin only|: 111115|strength magnitude| = #500, 111115|strength unit| =
179999999100|Has basis of strength| = (219999999102|Amoxicillin only|:
189999999103|Has strength magnitude| = #500, 199999999101|Has strength unit| = 258684004|mg|)} |
The expression below represents an oral solution that contains 0.083 % albuterol.
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91143003 |
albuterol has Has dose form| = 385023001|oral solution|, |
has Has active ingredient| = 372897005| |
albuterol 111115|has basis of strength| = (111115 |albuterol only|: 111115|strength magnitude | = #0.083, 111115|strength unit| =
179999999100|Has basis of strength| = (229999999109|Albuterol only|:
189999999103|Has strength magnitude | = #0.083, 199999999101|Has strength unit| = 118582008|%|)} |
String-based concrete values may also be used. For example, the expression below represents a tablet containing 500 mg of paracetamol with a trade name (or brand name) of "PANADOL"
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322236009| |
paracetamol Paracetamol 500mg tablet|: |
111115 209999999104|Has trade name| = "PANADOL" |
Please note that string-based concrete values should be used with caution. Care must be taken to only use these in situations in which the clinical meaning cannot be defined using a concept value.
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