openehr archetypes, templates and terminology dr ian mcnicoll scimp working group director openehr...
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openEHR Archetypes, Templates and
Terminology
Dr Ian McNicoll
SCIMP Working GroupDirector openEHR Foundation
Clinical Modelling Consultant, Ocean Informatics, UK
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openEHR Open specification for a clinical information
model◦ What is a clinical information model?◦ Multi-layer modelling
RM , archetypes, templates Use
◦ To help define shared clinical content definitions for interoperability, APIs
◦ To build and adapt clinical content for applications
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GPSOC - openEHR
www.openehr.org
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What is it used for? Generic application platform
◦ Does the heavy lifting of database /querying layer◦ Agile, clinically-defined content definitions◦ Not tied to any single solution or business model
‘Standards’ development◦ Clinically –driven and governed◦ Scalable and emergent◦ Agile, inclusive
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Clinical information modelling
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GUI
Copyright 2012 Ocean Informatics
“I want to record Pulse rate”
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“What exactly do you mean by ‘Pulse rate’”?
“Rate, rhythm, date recorded …..”?
Information model (typically UML)◦ Structure (OOP classes)◦ Business rules
“Rate >=0”◦ Terminology
SNOMED, ICD, local codes
Copyright 2012 Ocean Informatics
Clinical information requirements
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3.8
Formally (computably) expressed in:◦ Software : Application-specific internal “Information
models”, UML, database schema◦ Reference terminologies : READ, SNOMED CT, ICD-10, ◦ Messaging models : HL7, CDA, IHE profiles◦ Decision support , guidelines, rules
Informally expressed in:◦ Local forms, documents, professional guidelines◦ Data dictionaries for govt reporting
Continually evolving: restructured, new, deprecated
Copyright 2012 Ocean Informatics
Existing clinical knowledge
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Traditional modelling: the data dictionary
Copyright 2012 Ocean Informatics
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Copyright 2012 Ocean Informatics
Traditional modelling: UML
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Traditional modelling : application classes
Copyright 2012 Ocean Informatics
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The components of the Reference Model are like LEGO brick specifications
Archetypes = instructions/designs constraining the use of LEGO pieces to create meaningful structures
Principle
Archetype A Archetype B
Information modelInstances
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Copyright 2012 Ocean Informatics
openEHR: Multi-level modelling
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Dictionary definition … “a model or prototype”
Computable models of discrete clinical concepts◦ Familiar components of a health record
Blood pressure, Body weight, Symptom Medication order, Family history Prostate cancer histopathology result
‘Maximal dataset’ philosophy◦ Capture as many clinical perspectives as possible◦ Universal use case
Copyright 2012 Ocean Informatics
openEHR Archetypes
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Copyright 2012 Ocean Informatics
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Clinical Knowledge Manager – Web review tool www.openehr.org/ckm
© Ocean Informatics 2008
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Archetypes get the glory ◦ but templates deliver the datasets◦ Key clinical endpoint and starting point for
generation of technical artefacts Class libraries, GUI skeletons, Message schema
Most demand for clinical information content will originate as requests for datasets◦ Data entry forms◦ Diabetes shared care message◦ Discharge summary message
Copyright 2012 Ocean Informatics
Templates - the openEHR ‘workhorse’?
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openEHR Templates
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Antenatal visitDiabetic checkup
Archetypes and Templates
Weight
Archetypes
FH
HbA1c
BP
Issues
Assess
Tingling feetFeeling tired
76 kg
124/92
7.5%
Excellent control
66 kg
102/64 mmHg
142/min
NAD, see 4/52
Back pain
Template Template
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Each archetype carries its own unique local terminology, with multi-lingual capacity ◦ “Diastolic” [at0005]
‘Bindings’ to multiple external terminologies◦ Define a mapping to an external term, carrying
both the mapped term and local archetype term in the data
Copyright 2012 Ocean Informatics
Where does terminology fit?
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1. Termset binding to node valueLOINC: “Any Histopathology test”
2. Termset binding to node valueLOCAL: “Any Diagnostic service”
4. Term binding to a node valueset
3. Term binding to a node name “Histological grading” SNOMEDCT::1256879
Copyright 2012 Ocean Informatics
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© Ocean Informatics 2008
Questions ?
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Coffee break