This document discusses the implementation of HL7 and HL7 CDA standards for healthcare messaging exchange in Thailand. It provides background on the speaker, Nawanan Theera-Ampornpunt, and outlines Thailand's vision for eHealth, current status, and the role of standards. It then describes HL7 standards including versions 2 and 3, the Reference Information Model, and Clinical Document Architecture. The document outlines Ramathibodi Hospital's experience implementing HL7 messaging and CDA documents for lab results exchange. Next steps involve encouraging broader CDA adoption.
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Topics Covered:
1. Introduction to HL7: who, what, and why
2. Introduction to HL7 v3: what and why
3. History of the HL7 Reference Information Model
4. HL7 RIM Subjects, Core Classes, and Structural Attributes
5. State Machines of RIM Core Classes
6. HL7 v3 Datatypes
7. HL7 v3 Vocabulary
This tutorial will assist in preparation for the HL7 v3 Certification exam.
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The presentation talks about the components of FHIR, its distribution and use. Scenarios for the introduction of FHIR in the country using HL7 V3 are also offered.
In this tutorial participants will learn the history of the RIM, the method by which the RIM is maintained, and key characteristics of the RIM that make it the premier information model in healthcare.
Topics Covered:
1. Introduction to HL7: who, what, and why
2. Introduction to HL7 v3: what and why
3. History of the HL7 Reference Information Model
4. HL7 RIM Subjects, Core Classes, and Structural Attributes
5. State Machines of RIM Core Classes
6. HL7 v3 Datatypes
7. HL7 v3 Vocabulary
This tutorial will assist in preparation for the HL7 v3 Certification exam.
Presentation given at HL7 Norway on april 1st, 2014. Subjects are: why a new standard? what are the basic building blocks of FHIR? What are profiles? How do we make documents out of resources? Also contains some example architectures.
Transferring patient records around New Zealand, electronically. Presented by Peter Jordan, Patients First, at HINZ 2014, 11 November 2014, 11.15am, Plenary Room
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Abstract:
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HL7 & HL7 CDA: The Implementation of Thailand's Healthcare Messaging Exchange Standards
1. 1
HL7 & HL7 CDA: The
Implementation of Thailand’s
Healthcare Messaging Exchange
Standards
Nawanan Theera-Ampornpunt, M.D., Ph.D.
Deputy Executive Director for Informatics,
Chakri Naruebodindra Medical Institute,
Faculty of Medicine Ramathibodi Hospital, Mahidol University
Certified HL7 CDA Specialist
2. 2
A Bit About Myself...
2003 M.D. (First-Class Honors) (Ramathibodi)
2009 M.S. in Health Informatics (U of MN)
2011 Ph.D. in Health Informatics (U of MN)
2012 Certified HL7 CDA Specialist
Deputy Executive Director for Informatics,
Chakri Naruebodindra Medical Institute
Faculty of Medicine Ramathibodi Hospital
Mahidol University
nawanan.the@mahidol.ac.th
http://groups.google.com/group/ThaiHealthIT
3. 3
Outline
• A Vision
• HL7 & HL7 CDA Standards
• Ramathibodi’s Experience
Acknowledgments
• Some of these slides are reproduced/adapted
from those of Dr. Supachai Parchariyanon,
Miss Sireerat Srisiriratanakul, and Mr.
Chaiwiwat Thongtaveechaikit at
Ramathibodi
6. 6
Use of information and communications
technology (ICT) for health; Including
• Treating patients
• Conducting research
• Educating the health workforce
• Tracking diseases
• Monitoring public health.
Sources: 1) WHO Global Observatory of eHealth (GOe) (www.who.int/goe)
2) World Health Assembly, 2005. Resolution WHA58.28
Slide adapted from: Mark Landry, WHO WPRO & Boonchai Kijsanayotin
eHealth
7. 7
Use of information and communications
technology (ICT) in health & healthcare
settings
Source: The Health Resources and Services Administration, Department
of Health and Human Service, USA
Slide adapted from: Boonchai Kijsanayotin
Health IT
8. 8
eHealth Health IT
eHealth & Health IT
Slide adapted from: Boonchai Kijsanayotin
9. 9
All components are essential
All components should be balanced
eHealth Components
(WHO-ITU Model)
Slide adapted from: Boonchai Kijsanayotin
15. 15
Standards: Why?
• The Large N Problem
N = 2, Interface = 1
# Interfaces = N(N-1)/2
N = 3, Interface = 3
N = 5, Interface = 10
N = 100, Interface = 4,950
19. 19
Various Kinds of Standards
in Health Care
• Unique Identifiers
• Standard Data Sets
• Vocabularies & Terminologies
• Exchange Standards
– Message Exchange
– Document Exchange
• Functional Standards
• Technical Standards: Data Communications,
Encryption, Security
20. 20
Functional
Semantic
Syntactic
How Standards Support Interoperability
Technical Standards
(TCP/IP, encryption,
security)
Exchange Standards (HL7 v.2,
HL7 v.3 Messaging, HL7 CDA,
DICOM)
Vocabularies, Terminologies,
Coding Systems (ICD-10, ICD-9,
CPT, SNOMED CT, LOINC)
Information Models (HL7 v.3 RIM,
ASTM CCR, HL7 CCD)
Standard Data Sets
Functional Standards (HL7 EHR
Functional Specifications)
Some may be hybrid: e.g. HL7 v.3, HL7 CCD
Unique ID
21. 21
Message Exchange
• Goal: Specify format
for exchange of data
• Internal vs. external
messages
• Examples
HL7 v.2
HL7 v.3 Messaging
DICOM
NCPDP
Document Exchange
• Goal: Specify format
for exchange of
“documents”
• Examples
HL7 v.3 Clinical Document
Architecture (CDA)
ASTM Continuity of Care
Record (CCR)
HL7 Continuity of Care
Document (CCD)
Exchange Standards
22. 22
Messages
• Human Unreadable
• Machine Processable
Clinical Documents
• Human Readable
• (Ideally) Machine
Processable
Exchange Standards
23. 23
Hospital A Hospital B
Clinic C
Government
Lab Patient at Home
Message Exchange
Message
Message
Message
Message
Message
24. 24
Hospital A Hospital B
Clinic C
Government
Lab Patient at Home
Clinical Document Exchange
Message containing
Referral Letter
Message containing
Claims Request
Message containing
Lab Report
Message containing
Patient Visit Summary
Message containing
Communicable
Disease Report
26. 26
HL7 Standards
• HL7 V2.x
– Defines electronic messages supporting hospital
operations
• HL7 V3
• HL7 Clinical Document Architecture
(CDA) Releases 1 and 2
• HL7 Arden Syntax
– Representation of medical knowledge
• HL7 EHR & PHR Functional Specifications
• Etc.
27. 27
HL7 V3 Standards
• A family of standards based on V3
information models and development
methodology
• Components
– HL7 V3 Reference Information Model (RIM)
– HL7 V3 Messaging
– HL7 Development Framework (HDF)
31. 31
HL7 V3 Messaging
• V3 provides messaging standards for
– Patient administration
– Medical records
– Orders
– Laboratory
– Claims & Reimbursement
– Care provision
– Clinical genomics
– Public Health
– Etc.
32. 32
How HL7 V3 Works
• Message sent from sending application to
receiving application
• Message in XML with machine-
processable elements conforming to
messaging standard
• Data elements in message conform to RIM
• Not designed for human readability
33. 33
What Is HL7 CDA?
• “A document markup standard that
specifies structure & semantics of “clinical
documents” for the purpose of exchange”
[Source: HL7 CDA Release 2]
• Focuses on document exchange, not
message exchange
• A document is packaged in a message
during exchange
• Note: CDA is not designed for document
storage. Only for exchange!!
34. 34
A Clinical Document (3)
• A CDA document is a defined & complete
information object that can include
Text
Images
Sounds
Other multimedia content
Source: HL7 CDA R2
35. 35
Key Aspects of CDA
• CDA documents are encoded in XML
• CDA documents derive their machine
processable meaning from HL7 RIM and
use HL7 V3 Data Types
• CDA specification is richly expressive &
flexible
Templates can be used to constrain generic
CDA specifications
Source: HL7 CDA R2
36. 36
Scope of CDA
Lab Technician Physician
Lab Report
Create
document
Process &
Store
document
Transmit
document
CDA
37. 37
CDA & HL7 Messages
• Documents complement HL7 messaging
specifications
• Documents are defined and complete information
objects that can exist outside of a messaging
context
• A document can be a MIME-encoded payload
within an HL7 message
Source: “What is CDA R2? by Calvin E. Beebe
at HL7 Educational Summit in July 2012
38. 38
CDA & Message Exchange
• CDA can be payload (or content) in any kind of
message
– HL7 V2.x message
– HL7 V3 message
– EDI ANSI X12 message
– IHE Cross-Enterprise Document Sharing (XDS)
message
• And it can be passed from one kind to
another
Source: “What is CDA R2? by Calvin E. Beebe
at HL7 Educational Summit in July 2012
39. 39
CDA & Message Exchange
Clinical Document
(Payload)
HL7 V3 Message
(Message)
HL7 V2 Message
(Message)
Source: Adapted from “What is CDA R2? by Calvin E. Beebe
at HL7 Educational Summit in July 2012
40. 40
CDA As Payload
Source: From “What is CDA R2? by Calvin E. Beebe
at HL7 Educational Summit in July 2012
42. 42
CDA Model
Source: From “What is CDA R2? by Calvin E. Beebe
at HL7 Educational Summit in July 2012
43. 43
A Closer Look at a CDA Document
<ClinicalDocument> ... CDA Header ...
<structuredBody> <section> <text>... Single
Narrative Block ...</text>
<observation>...</observation>
<substanceAdministration>
<supply>...</supply>
</substanceAdministration> <observation>
<externalObservation>...
</externalObservation> </observation>
</section> <section> <section>...</section>
</section> </structuredBody>
</ClinicalDocument>
Source: HL7 CDA R2
Human Readable Part
Machine Processable Parts
44. 44
Rendering CDA Documents (1)
Source: From “What is CDA R2? by Calvin E. Beebe
at HL7 Educational Summit in July 2012
45. 45
Rendering CDA Documents (2)
Source: From “What is CDA R2? by Calvin E. Beebe
at HL7 Educational Summit in July 2012
46. 46
CDA Releases
• CDA Release 1 (ANSI-approved in 2000)
– First specification derived from HL7 RIM
• CDA Release 2 (2005) - Current Release
– Basic model essentially unchanged from R1
• Document has a header & a body
• Body contains nested sections
• Sections can be coded using standard vocabularies and can
contain entries
– Derived from HL7 RIM Version 2.07
Source: HL7 CDA R2
47. 47
Some Possible Use Cases of CDA
Intra-institutional
Exchange of parts of medical records (scanned or
structured electronic health records)
Lab/Imaging requests & reports
Prescriptions/order forms
Admission notes
Progress notes
Operative notes
Discharge summaries
Payment receipts
Other forms/documents (clinical or administrative)
48. 48
Some Possible Use Cases of CDA
Inter-institutional
Referral letters
Claims requests or reimbursement documents
External lab/imaging reports
Visit summary documents
Insurance eligibility & coverage documents
Identification documents
Disease reporting
Other administrative reports
49. 49
Achieving Interoperability
CDA is a general-purpose, broad standard
Use in each use case or context requires
implementation guides to constrain CDA
Examples
Operative Note (OP)
Consultation Notes (CON)
Care Record Summary (CRS)
Continuity of Care Document (CCD)
CDA for Public Health Case Reports (PHCRPT)
Quality Reporting Document Architecture (QRDA)
50. 50
CDA Summary (1)
CDA is a markup standard for document
exchange
Not message exchange
Not document storage or processing
CDA is a general-purpose standard
Use in specific context requires
Implementation Guides (and possibly
Extensions)
51. 51
CDA Summary (2)
CDA is XML-based and RIM-based
CDA documents can be exchanged as
encapsulated data (payload) in any message
(HL7 V2, HL7 V3, etc.)
CDA is not dependent on using HL7 V3
messages
Most likely early use cases for CDA
Referrals
Claims & Reimbursements
Lab/imaging Reports
Electronic Health Records Documents