Definition | Examples |
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The |Substance| hierarchy contains concepts that can be used for recording and modeling: chemical constituents of medicinal and non-medicinal products; allergies, adverse reactions, poisoning; physicians and nursing orders and laboratory reports and results. Subhierarchies of |Substance| include but are not limited to: |Body substance (substance)| and |Chemical (substance)| |
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General Assumptions and Requirements
Decisions regarding requirements, applicable use cases, scope, terming, and modeling guidelines are made based on requests submitted by user community and in consultation with subject matter experts, associated Project Groups, and relevant credible references.
Top level concepts in the hierarchy will primarily be grouper concepts for both the stated and inferred views.
Concepts representing dispositions in the |Substance| hierarchy shall be sufficiently defined using proximal primitive modeling methodology unless explicitly noted as an exception in the editorial guidelines.
Scope of Content
This section applies to the |Substance| hierarchy in the International Release:
In Scope | |
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1 | Substances that support the modeling of concepts in other SNOMED CT hierarchies including but are not limited to: Medicinal product, Clinical finding, Procedure, Observable Entity, and Specimen |
2 | Substances that support the modeling of the existing herbal products in SNOMED CT
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Out of Scope | |
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1 | Concepts that refer to dose form (e.g., solution) or route of administration (e.g., topical)
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2 | Concepts that refer to role or a specific context (e.g., dietary, medicinal, non-pharmaceutical, substance of abuse)
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3 | Concepts that refer to a release state (e.g., immediate release, extended release)
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4 | Concepts that refer to a brand or trade name
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5 | Concepts that state "total" due to the inability to differentiate the definition between the "base" substance and "total" substance (e.g., "cholesterol" versus "total cholesterol") as well as the inability to create an appropriate relationship between the "base" and "total" concepts
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6 | Substances of the pattern |X molecule of Y organism (substance)| which reference an organism that is not of interest to human medicine are considered out of scope of SNOMED CT.
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7 | Substances used in homeopathic products
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8 | Substances used in traditional medicine products
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9 | Concepts that represent a combination of two or more separate substances
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10 | Concepts representing genetic engineering process variations such as Somatropin (epr), Somatropin (rbe), or Somatropin (rmc) are out of scope as SNOMED CT does not generally differentiate substances based on production process.
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