Transcript PHIN VADS Webinar Series - #2 PHIN VADS Application Integration & Web Services Overview Dec 2nd, 2010

PHIN VADS Webinar Series - #2
PHIN VADS Application Integration & Web Services
Overview
Dec 2nd, 2010
Agenda
(1) Overview of PHIN VADS application
(2) PHIN VADS Framework
(3) PHIN VADS Web services (HL7 CTS, IHE ESVS)
(4) PHIN VADS integration with other public health
applications
(5) IHE Connectathon 2011 & HIMSS Interoperability
show case
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PHIN VADS registered as value set repository to support
IHE public health profiles
(6) Q & A
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Vocabulary Definitions & Examples
Code System
Defined As:
A collection of codes
with its descriptions.
SNOMED-CT,
ICD-9
Example:
“AKA”
Terminology, Vocabulary,
Thesaurus, Taxonomy
Value Set
Defined As:
A collection of concepts created
for a specific purpose such as in
response to a question.
Example:
A subset of microorganisms
related to “Influenza” from
SNOMED-CT
“AKA”
Answer Lists, Permissible
Values, Pick List, Code Set
Concept
Defined As:
Represents a single idea such as
the name of a microorganism.
Example:
Influenza A Virus
Vocabulary View (Messaging Guides)
“Vocabulary View” refers to a collection of value sets associated with a HL7
messaging guide or CDA. View is also versioned and can be downloaded as a zip
file. View can also be accessed using web services.
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Vocabulary View Metadata
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HL7 Common Terminology Services
HL7 CTS Wiki Web page
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HL7 CTS Benefits
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HL7 CTS Implementations
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IHE Enhanced Sharing Value Set (SVS)
IHE ESVS Specification download link (August 2010)
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IHE ESVS – Value Set retrieval
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What is PHIN VADS?
• In 2004, CDC developed a web-based enterprise vocabulary system called the
Public Health Information Network Vocabulary Access and Distribution System
(PHIN VADS) for accessing, searching, and distributing HL7 messaging value sets
used within the PHIN and NHIN.
• Provides all the vocabulary metadata needed for HL7 messaging.
• Promotes sharing and reusing of the value sets.
• Hosts multiple versions of value sets that allow implementers to have access to
the current, past and the future versions of value sets and value set collections
• Provides web services (API) that allows HL7 interface engines, medical and public
health applications to obtain the value sets as well as validate the vocabulary
present in HL7 messages.
• Provides detailed code system metadata for value set concepts such as context,
hierarchy, synonyms and alternate codes. This will facilitate the implementation
of value sets and improve the quality of local vocabulary mapping to standards.
• PHIN VADS can be accessed at a public web site - http://phinvads.cdc.gov
• CDC Vocabulary and Messaging team manages the PHIN VADS.
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PHIN VADS Content
• Currently, PHIN VADS has 592 value sets supporting 60 HL7 and
CDA message implementation guides. The PHIN VADS hosts
both the intrinsic and extrinsic value sets.
• PHIN VADS also hosts 149 SDO code systems that are used by
HL7 messaging value sets. Many of the code systems (~ 120)
belong to HL7 v2.x or V3.
• PHIN VADS updates the value sets often based upon SDO code
system updates.
• PHIN VADS Hyperlinks for Meaningful Use (MU) Stage 1
Vocabulary:
a) MU Stage 1- Immunization HL7 2.5.1 IG Vocabulary
b) MU Stage 1- ELR HL7 2.5.1 IG Vocabulary
c) MU Stage 1 – Value sets related to Syndromic Surveillance
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PHIN VADS Content Access
• PHIN VADS can be accessed using one of the
following methods :
1) PHIN VADS Web Browser - http://phinvads.cdc.gov
2) PHIN VADS Web Service – System to System
exchange of vocabulary data.
3) PHIN VADS Lite – Local instance of VADS web
services and database
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PHIN VADS Framework
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PHIN VADS Web Services: System-toSystem Exchange of vocabulary data
Web Browser
VADS Web
Application
VADS Web
Services
•The PHIN VADS web application is built upon the PHIN VADS web services.
•When using the PHIN VADS application, the web services are used indirectly.
•These web services are public and built upon open standards (HL7 CTS2 , IHE
SVS).
PHIN VADS Web Services
Custom
Program
VADS Web
Services
•Custom programs, applications, or data extraction scripts can be written to
directly use PHIN VADS Web Services.
•The PHIN VADS technical team is available to assist you.
•Sample code and a detailed API are available in the PHIN VADS Developer’s
Toolkit - http://phinvads.cdc.gov/vads/developersGuide.action
PHIN VADS Lite
• Allows any individual or organization to implement a local
instance of the VADS service and database.
• The VADS Lite deployment is available for Oracle and Microsoft
SQL Server.
• VADS Lite is not deployed with a User Interface
• The deployment model requires the users to download, install,
and maintain a local installation on their hardware. Vocabulary
Server with Application Programming Interface (API) may allow
the vendors or implementers to integrate the vocabulary server
with their application.
– E.g. NEDSS Messaging Subscription Service application includes PHIN
VADS vocabulary server and Orion Rhapsody that will help validate HL7
messages and assist mapping between local and standard terminology.
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Custom Downloader Example
• PHIN VADS custom downloader can be used like a shopping cart
for downloading the VADS content.
• Useful tool especially for generating custom reports and queries
from PHIN VADS database.
• Can be easily executed by non-technical people (Epidemiologist,
Clinicians, Quality Measure Developers, Value set creators, etc..)
• Allows to download several value sets into a single file. This helps
the implementers to import value set collections into a database
(E.g. EpiInfo, State Public Health Surveillance Applications, LIS)
• Uses VADS web services to query the VADS database.
• Value set and quality developers can use this tool to develop the
intrinsic value sets using the hierarchical relationships from SDO
vocabulary such as SNOMED.
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CDC Interoperability Tools (Case Notification)
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PHIN VADS Application Integration
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PHIN Message Subscription Service (VADS Lite  Web Services)
PHIN Message Quality Framework (MQF) , CDS (Web Services)
NEDSS Based System - NBS (Web Services)
EpiInfo (Custom downloader Web services)
National Healthcare Safety Network – NHSN (VADS Lite  Web services)
Environmental Public Health Track Network – EPHTN (Web services)
IHE Connectathon - EMR Vendors (Web services – IHE ESVS)
Quality Measure Developers authoring value sets (Custom Downloader)
PHIN VADS interaction with other vocabulary & Messaging tools
(Web services) – Work in progress
– LexGrid, IHTSDO SNOMED Workbench, Messaging Workbench, UMLS UTS, Virginia
Tech SNOMED Browser, USHIK, USGS, EPA SRS, RELMA, HL7 interface Engines, etc..
– RELMA – Bookmarking feature of VADS to link VADS value sets to LOINC questions
(data elements) and also used in HL7 Msg IG.
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IHE Connectathon
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IHE Connectathon Event – Public Health
profiles
• PHIN VADS participating as value set repository
supporting the following IHE public health profiles:
1) Physician Reporting to a Public Health Repository – Cancer
Registry (PRPH)
2) Maternal & Child Health - CDC NCHS Vital records: Birth
Certificate & Fetal Death Report
3) Early Hearing Detection & Intervention (EHDI)
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Value Set Consumer interaction with PHIN
VADS (IHE Connectathon)
• Value set consumer downloading all the value sets associated
with each IHE profile (e.g. Download views - MCH, Cancer, EHDI)
• Value set consumer sending a value set identifier (OID) to
retrieve the value set concepts (e.g. To populate the drop down
in a form or to see if the concept is found in EMR repository –
data mining such as MCH)
• Value set consumer sending a concept code and code system
OID to value set repository (VADS) in order to find out if the
concept is part of the value set (e.g. Trigger for cancer reporting)
• Value set consumer (State Cancer Registry) validates the codes
being sent in the report by making a quick web service call to
PHIN VADS. If it was an invalid code or not part of the value set,
it would give a warning or error message.
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PHIN VADS Support - phConnect
PHIN VADS online forum URL: http://www.phconnect.org/group/phinvads
E-mail:
[email protected]
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Demonstration
- PHIN VADS Developers Guide
Questions
Value Set Authoring Tool Webinar
Webinar
Invitation
link
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Acknowledgments
Sundak Ganesan – Lead Vocabulary Specialist
Sheila Abner – Vocabulary Specialist
Steve Eady – Tech Lead
Prosenjit Dutta – Developer
Scott Keller – Database Analyst
Cathy Lester – Quality Assurance/Tester
Vanessa Fernandez – Business Analyst
Michael Pray – Project Manager
Mark Winarsky & Gautam Kesarinath
– CDC FTE Program Managers
 Nikolay Lipskiy – CDC FTE lead for SDO standards
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Appendix
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Vocabulary Distribution Portals
• NLM Unified Medical Language System (UMLS)
– SDO vocabulary (RxNorm, SNOMED), mapping between standards, subsets, etc..
• Centers for Disease Control & Prevention (PHIN VADS)
– Public health & clinical care value sets, HL7 Messaging IG value sets distribution, web services, ..
• National Cancer Institute (NCI) – Enterprise Vocabulary Services (EVS)
– Cancer domain, NCI Metathesaurus, FDA vocabulary (SPL, UNII), Gene (HUGO, GO), etc..
• Environment Protection Agency (EPA) – Substance Registry System (SRS)
– Substance (Chemical, Physical, Biological), Map to CAS #, vocabulary (Air, Water, Soil), etc…
• Agency for Healthcare Research & Quality – United States Health Information
Knowledgebase (USHIK)
– Metadata registry of healthcare data elements and information models of SDOs, HITSP, …
• Mayo Clinic - LexGrid , LexBig, LexWiki
– Distributed network of terminologies and ontologies using std. tools, web services (HL7 CTS), …
• Washington Publishing Company (WPC) – Taxonomy browser & file server
– Code lists supporting administrative data – X12, NUCC, HIPAA, etc…
• Commercial Terminology Distribution (Vendors)
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PHIN VADS Information Model
PHINVADS Information Model
CodeSystem
VocabularyView
CodeSystemConcept
VocabularySourceReference
VocabularyViewVersion
CodeSystemConceptAltDesignation
ViewValueSetVersion
ValueSetConcept
CodeSystemPropertyReference
CodeSystemConceptProperty
ConceptRelationship
ValueSetVersion
VocabularyAuthorityReference
ValueSet
GroupCodeSystem
PHINVocabularyGroup
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ValueSetGroup
Value Set Maintenance (Versioning)
Change Event Model:
PHIN VADS maintains the
past, current and future
versions of a value set.
Used for capturing the
complicated versioning
process.
Allows for locking of
vocabulary objects during
vocabulary authoring.
Provides a historical record
of all changes made to an
object over time.
Each change is stored as a
delta from prior version to
proposed version.
Supports collaborative
authoring managed through
governance.
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PHIN VADS Change Control Model
• Allows locking of a subset of the data model to be edited.
• Change Control Model provides a mechanism for governance
of edits to VADS data.
• Organizes edits to subsets of the data structure, such as Code
System, Value Set, Vocabulary Views, etc.
• Edits to VADS are checked against business rules, then applied
as a group to the actual tables
• Completed edits are moved via XML as a Change Control
Package to the Review and Production environments.
• Each change control package contains the original vocabulary
item as well as its changes. This can be used for reports later.
• The Change Control Package provides an audit trail.
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Change Control Model
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PHIN VADS Data Dictionary
•
Please contact PHIN VADS team at [email protected] for PHIN VADS data dictionary.
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