HL7 v2.9 Vocabulary
0.1.0 - ci-build

HL7 v2.9 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/frankoemig/hl7.v2.terminology.v29/ and changes regularly. See the Directory of published versions

CodeSystem: Auto-Dilution Type (2.9 - 1.0.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/auto-DilutionType Version: 1.0.0
Active as of 2026-01-27 Computable Name: Auto-DilutionType
Other Identifiers: OID:2.16.840.1.113883.18.445

Copyright/Legal: HL7 Inc., 2026

Code system of vendor-defined codes that specify the pre‑configured dilution to be applied on the instrument, which can be used instead of a numeric declaration. Used in Version 2 messaging in the TCD segment.

This Code system is referenced in the content logical definition of the following value sets:

Properties

This code system defines the following properties for its concepts

NameCodeURITypeDescription
versionIntroduced versionIntroduced http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced string version when was this code introduced
versionDeprecated versionDeprecated http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated string version when was this code deprecated
status status http://hl7.org/fhir/concept-properties#status code A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired
comment comment http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment string A string that provides additional detail pertinent to the use or understanding of the concept
usage usage http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage string usage notes for this code
modified modified http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified dateTime date of last modification

Concepts

This case-sensitive code system http://terminology.hl7.org/v2plusvocab/CodeSystem/auto-DilutionType defines the following codes:

CodeDisplayDefinitionversionIntroducedusagemodified
D1 Dilution factor 1.23 Specimen pre-diluted by factor 1.23 applied on the instrument 2.9 corresponds to ^1^:^1.23 in TCD-2 2016-03-16
D2 Dilution factor 1.45 Specimen pre-diluted by factor 1.45 applied on the instrument 2.9 corresponds to ^1^:^1.45 in TCD-2 2016-03-16
X2 Dilution factor 2 Specimen pre-diluted by factor 2 applied on the instrument 2.9 corresponds to ^1^:^2 in TCD-2 2016-03-16
X5 Dilution factor 5 Specimen pre-diluted by factor 5 applied on the instrument 2.9 corresponds to ^1^:^5 in TCD-2 2016-03-16