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Use of the UMLS in Patient Care

Use of the UMLS in Patient Care. James J. Cimino, M.D. Center for Medical Informatics Columbia University. UMLS in Patient Care. Quick overview of the UMLS Quick overview of clinical system at Columbia-Presbyterian Medical Center Comparison of UMLS and CPMC Recommendations.

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Use of the UMLS in Patient Care

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  1. Use of the UMLS in Patient Care James J. Cimino, M.D. Center for Medical Informatics Columbia University

  2. UMLS in Patient Care • Quick overview of the UMLS • Quick overview of clinical system at Columbia-Presbyterian Medical Center • Comparison of UMLS and CPMC • Recommendations

  3. Unified Medical Language System • U.S. National Library of Medicine • Three Knowledge Sources • Semantic Network • Metathesaurus • Information Sources Map

  4. UMLS Semantic Network • Strict hierarchy • Semantic types: 132 • Semantic relations: 46 • Inheritance of relations: 6233

  5. UMLS Semantic Network Process_of

  6. UMLS Metathesaurus • Terms from 22 controlled vocabularies • Total source terms: 311,046 • Total strings: 279,237 • Total concepts: 152,444 • Relationships: 1,484,994

  7. UMLS Metathesaurus Extracellular Space <body space or junction> Dehydration <Disease or Syndrome> contained_in Body Fluid <body substance> Other Narrower Plasma <body substance> Blood <tissue> has_part

  8. CPMC Clinical Database Person Patient Provider Organization Location Medical Entity Clinical Event Clinical Database MED

  9. Medical Entities Dictionary • Semantic Network • Sources: 5 • Strings: 108,492 • Concepts: 35,281 • Semantic relations: 23 pairs • Semantic Links: 145,672

  10. Medical Entities Dictionary Medical Entity Laboratory Specimen Substance Event Anatomic Substance Plasma Specimen Diagnostic Procedure Chemical Substance Sampled Carbo- hydrate Bioactive Substance Laboratory Procedure Laboratory Test Plasma Has Specimen Plasma Glucose CHEM-7 Glucose Substance Measured Part of

  11. Comparisons - Methods • CPMC Entities vs. UMLS Semantic Types • MED Classes vs. UMLS Semantic Types • MED Semantic Links vs. UMLS Semantic Relations • MED Concepts vs. Metathesaurus Concepts • MED Semantic Links vs. Meta Relations

  12. Comparisons - Results CPMC DB Entities Classes Links Concepts Types ++++ +++ U M L S Relations ++ Concepts +++ +/- Meta Links

  13. Recommendations - General • Make “Event” a temporal concept • Conceptual vs. Physical polarization • Directed Acyclic Graph • Merge Network and Metathesaurus

  14. Recommendations - Specific • Tests have Specimens • Tests have Parts • Separate Medications from Chemicals • Liberalize assignment of Relations

  15. Summary • Semantic Types provide good coverage • Concepts provide good coverage in certain domains • No technical reason why UMLS could not incorporate clinical vocabulary

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