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Healthcare Units of Measure Ontology Evolution at Intermountain

Learn about the evolution of healthcare units of measure ontology at Intermountain, including its history, development, and future applications. Discover the coded representation of units, HL7 standards, and the latest advancements in this field.

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Healthcare Units of Measure Ontology Evolution at Intermountain

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  1. Intermountain HealthcareUnits of Measure Stanley M. Huff Yan Heras Ming-Chin Lin

  2. Experience at Intermountain • Coded representation of units of measure for patient data in the HELP system (40 years) • Hierarchical structure for coded units of measure created jointly with 3M Health Information Systems about 15 years ago • Over 600 units of measure • Includes long names and common abbreviations

  3. Units of measure and HL7 • Health Level Seven • Healthcare interoperability standards • Coded units of measure used in data exchange messages • Originally used enhanced ISO units of measure (ISO+) • Adopted UCUM (Unified Codes for Units of Measures) about 5 years ago • Developed by Gunther Schadow and Clem McDonald at Regenstrief Institute in Indianapolis • Base units – gram, meter, liter, mole, degree Celsius, etc • Multipliers – micro, kilo, deci, milli, etc. • Rules for making combinations – gm/L, gm/kg/d, etc.

  4. HL7 Common combinations • HL7 Vocabulary committee (especially Sundak Ganesan) created list of all healthcare units of measure • Organized based on IUPAC/IFCC Silver Book “kind-of-property” – mass, length, heat, time, mass concentration, frequency, etc. • Includes commonly used (user friendly) designations

  5. Most recent work at Intermountain • New units of measure hierarchy created jointly by Intermountain and General Electric • Combined master file created by Ming-Chin Lin as part of his PhD project • Intermountain will contribute any and all of the previous work to the new effort

  6. Questions (1) • How (in what ways) will the new ontology be used? • Unit conversions? • Associations between kind-of-property and unit of measure • Will any other sort of reasoning be supported? • What is the scope of the new ontology? • Health sciences only? • All measurements? • Something else? • Will synonyms and standard designations be included?

  7. Questions (2) • Will the new ontology be only “pure” units of measure? • Pure – mg/gm, gm/dL, km/h • Mixed – mg/gm of hemoglobin, mg/gm of creatinine • I think we should cover all units and “unit-like” things that people actually use

  8. Questions (3) • Do we include imprecise and or improper units of measure • mg/packet, mg/spray, mg/drop • International units (impure reference compounds) • Todd, Bethesda • EIA unit, Absorbance unit • Again, I think we should cover all things that people currently use

  9. Questions?

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