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openEHR Developers Workshop at #MedInfo2015


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My presentation about projects and ideas for EHR development using the openEHR standard

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openEHR Developers Workshop at #MedInfo2015

  1. 1. 1 The openEHR Developers workshop Pablo Pazos Gutiérrez Experiences on developing software with openEHR
  2. 2. 2 We've worked on interesting topics • Clinical Databases / Clinical Data Repositories • Web Services / REST APIs • GUI Auto-generation • Rules for Clinical Decision Support • An Open EHR Platform (combination of ^) • Open Source Software • All based on
  3. 3. 3 Open EHR Platform reusing components and services to build you own apps and systems
  4. 4. 4 EHRServer Service-oriented clinical data repository for shared EHRs, based on the openEHR standard.
  5. 5. 5 EHRServer • Services – commit • feed data to the EHR of a patient • openEHR XML documents • validates against the openEHR XSD • versioned data (no physical delete or modification of data) – query • clinical documents by complex criteria • data points with different groupings – sync (TBD) • scaling EHRServers • enable high availability – other • get patients, ehrs, clinical documents, queries, ...
  6. 6. 6 EHRServer • Features – REST API (SOAP will be enabled soon) – Multi-format query results (XML, JSON, need more?) – Versioned data – EHR audit • All modifications of an EHR are recorded • Who, when, what, from where, ... – Admin GUI • Query building and testing (archetype-based queries) • EHR Audit • Organization of clinical records in folders • Adding templates – Adds support for new clinical records – Without changing source code or database schema
  7. 7. 7 EHRServer • Technologies – Java / Groovy – Grails Framework – MySQL (can be replaced) • Out of scope – No GUI for clinical records (that's on client apps) • Open Source – EHRServer • – Sample client apps • • • – Javascript connector •
  8. 8. 8 EHRServer Query Builder
  9. 9. 9 Query testing before creating
  10. 10. 10 Test it yourself!
  11. 11. 11 EHRGen EHR Generator Framework
  12. 12. 12 EHRGen • Features – Load archetypes and UI templates (T) with references to archetypes – Associate (T) with workflows (WF)  – UIs are auto-generated from (T) – Menus are auto-generated from (WF) – Data validation using archetypes – Generic data storage (any openEHR data structure) – No need to change the source code or database schema to add more types of clinical records • just add archetypes and UI templates • EHRGen will do the rest :D • TODO: – Use Operational Templates (OPT) instead of archetypes – Commit data to the EHRServer • Test it: –
  13. 13. 13 EHRGen’s archetype-based queries SELECT RESULTS
  14. 14. 14 UI Generation / Current Work • Generalization to generate UIs for any technology / device – ... that has a declarative UI language / syntax • Generic UI Template Model – References openEHR archetypes / operational templates – XML expression of UI Template • UI Generator maps UI Templates to declarative UIs in any technology – XAML, SwiXML, HTML5, XHTML, Android XML Layouts, ... – Using mappings from the canonical UI Template to each declarative UI syntax • Use cases: – accelerate openEHR app development – fast prototyping and user validation • Soon: – full spec on for openEHR UI Templates
  15. 15. 15 UI Template Model (simplified) organization of sections in the screen references to openEHR archetypes / templates view = screen / form form controls (fields) and labels on screen for archetype nodes
  16. 16. 16 XML Rule Engine Rules and Clinical Decision Support: (re)using clinical data to help clinicians
  17. 17. 17 XML Rule Engine for CDS • Requirement: – Women should have a PAP test once a year. • Rule: – If last PAP test of a patient was done more than a year ago, then send an alert. • Clinical information (tests) can be pulled from different systems – EHRServer using semantic queries (path-based). – Different data sources can be combined in the same rule. • Rule is evaluated using a REST Web Service – patient id is an input parameter <xrl:unit xmlns:xrl=""> <header> <id>gine_alerts.v1</id> </header> <rules> <rule> <id>pap_test_alert.v1</id> <name>alerta para recordatorio de test de papanicolaou</name> <definitions> <var name="last_pap_test_date" type="date"> <resolutor type="http"> <locator url="http://localhost/gine_tests.xml" /> <extractor path="tests.test.time" /> <aggregator type="last" /> <param name="patient_id" /> </resolutor> </var> <var name="ret_alert" value="alert" type="string" /> <var name="ret_ok" value="ok" type="string" /> <var name="days_from_last_pap" type="integer"> <resolutor type="action"> <action type="dateDiff" in1="last_pap_test_date" in2="$now" units="days" /> </resolutor> </var> </definitions> <logic> <if> <gt in1="days_from_last_pap" inc2="365" /> <do> <action type="..." params="..."></action> <return name="last_pap_test_date" /> <return name="days_from_last_pap" /> <return name="ret_alert" /> </do> </if> <else> <do><return name="ret_ok" /></do> </else> </logic> </rule> </rules> </xrl:unit>
  18. 18. 18 XML Rule Engine for CDS • Results on screen: – For each patient – Alerts showing the result of evaluating the pap rule – Can add a sex check in the rule to see if the rule applies (for females only) – Rules results can be integrated in any system
  19. 19. 19 • We wouldn't build any of those without – open specifications – open source reference implementations (Java, Ruby, .Net, Python) – awesome community! • Thanks to that, we have: – very flexible and generic software, – maintainable without changing source code or database schemas, – standardized clinical data, – consistent ways of querying and share clinical data – bindings to standard terminologies (SNOMED CT, ICD-10, CIAP-2, LOINC, ...) – compatible with technical data transfer standards (HL7 v2.x, HL7 v3, CDA, FHIR, DICOM, ...) • Our software is all open source, main application (today) is training. – Please join our projects to help us build the Open EHR Platform! Conclusion
  20. 20. 20 Muito Obrigado @ppazos