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Intermountain Healthcare Units of Measure

Intermountain Healthcare Units of Measure. Stanley M. Huff Yan Heras Ming-Chin Lin. Experience at Intermountain. Coded representation of units of measure for patient data in the HELP system (40 years)

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Intermountain Healthcare Units of Measure

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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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