standards & coding systems in biomedical and health informatics
DESCRIPTION
A presentation for the Dental InformaticsTRANSCRIPT
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Standards & Coding Systems
in Biomedical and Health Informatics
นพ.นวนรรน ธีระอัมพรพันธุ์
บรรยาย ณ สถาบันทันตกรรม ในหลักสูตรทันตสารสนเทศศาสตร์
24 กุมภาพันธ์ 2555
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A Few Words About Me...
2003 M.D. (1st-Class Honors) Ramathibodi
2009 M.S. (Health Informatics) University of Minnesota
2011 Ph.D. (Health Informatics) University of Minnesota
Currently
• Medical Systems Analyst, Health Informatics Division, Ramathibodi
Contacts
SlideShare.net/Nawanan
www.tc.umn.edu/~theer002
groups.google.com/group/ThaiHealthIT
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Manufacturing
Image Source: Guardian.co.uk
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Banking
Image Source: Cablephet.com
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Healthcare
ER - Image Source: nj.com
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Why Healthcare Isn’t Like Any Others?
Life-or-Death
Many & varied stakeholders
Strong professional values
Evolving standards of care
Fragmented, poorly-coordinated systems
Large, ever-growing & changing body of
knowledge
High volume, low resources, little time
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Why Healthcare Isn’t Like Any Others?
Large variations & contextual dependence
Input Process Output
Patient Presentation
Decision-Making
Biological Responses
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But...Are We That Different?
Input Process Output
Transfer
Banking
Value-Add- Security- Convenience- Customer Service
Location A Location B
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Input Process Output
Assembling
Manufacturing
Raw Materials Finished Goods
Value-Add- Innovation- Design- QC
But...Are We That Different?
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Input Process Output
Patient Care
Healthcare
Sick Patient Well Patient
Value-Add- Technology & medications- Clinical knowledge & skills- Quality of care; process improvement- Information
But...Are We That Different?
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Information is Everywhere
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Types of Healthcare Information Clinical Information
Demographics, History, Physical Exam
Laboratory tests & Other Investigations (e.g. ECG), Imaging
Diagnoses, Medications, Treatments
Genomics
Information about Healthcare Organizations & Operations
Public Health Information - Epidemiology, Environmental
Research Information - Basic Science, Clinical Research, Public Health
Generic Health Information (e.g. Patient education materials)
Knowledge Bases (e.g. PubMed) & Professional Education Materials
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Various Forms of Health IT
Hospital Information System (HIS) Computerized Provider Order Entry (CPOE)
Electronic Health
Records (EHRs)
Picture Archiving and Communication System
(PACS)
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Still Many Other Forms of Health IT
m-Health
Health Information Exchange (HIE)
Biosurveillance
Information RetrievalTelemedicine &
Telehealth
Images from Apple Inc., Geekzone.co.nz, Google, PubMed.gov, and American Telecare, Inc.
Personal Health Records (PHRs)
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Health IT: What’s In A Word?
Goal
Value-Add
Tools
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Recap
Healthcare is complex and information-rich
Healthcare information is heterogeneous
Health IT is a tool to add value to care delivery
Health IT comes in many different shapes and
forms, many must integrate with one another
Yet healthcare is highly fragmented...
That’s why we need “STANDARDS”
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Standards Are Everywhere
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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
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Health Information Exchange (HIE)
Hospital A Hospital B
Clinic C
Government
Lab Patient at Home
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The Goal Is...
Interoperability
Inter-operable systems
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Types of Standards
De facto (informal/in practice) standards
Dominant custom, convention, product, system
e.g. Microsoft Word, QWERTY keyboard
De jure (formal) standards
Developed by recognized standard developing
organizations
Maybe obligatory/regulatory, or voluntary
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Standard-Developing Organizations (SDOs)
Develops, coordinates, revises, interprets &
maintains standards that address interests outside its
own organization
Clear scope
Formal standards development process
International, regional, national authorities
Examples: ISO, IEC, ITU, IEEE, IETF, W3C, ANSI, NIST,
HL7, ASTM
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Sample Standards Development Process
Draft Proposal Working Group Consideration
Public Comment/Balloting
Working Group Amendment
(Additional Balloting or Approval)
Test/Trial Use
Deployment (Enforcement/Certification)
Evaluation/Maintenance
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Various Kinds of Standards
Unique Identifiers
Standard Data Sets
Vocabularies & Terminologies
Exchange Standards
Message Exchange
Document Exchange
Functional Standards
Technical Standards: Data Communications, Encryption
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Wisdom
Knowledge
Information
Data
DIKW Pyramid
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Levels of Interoperability
Functional
Semantic
Syntactic
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Unique Identifiers A unique convention to identify a class of objects E.g. serial numbers, national citizen ID, HN (MRN), NDC Unique within scope of intended operations e.g. a hospital, a
company, a city, a country, or globally May or may not be “smart numbers” (digits with meaning).
Smart numbers are bad practices. May or may not have “check digits” (digits used to prevent
data entry errors) In general, not supposed to be confidential (except U.S.
Social Security Numbers, credit card numbers)
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Standard Data Sets
Sometimes called minimum data sets
Data structure (fields, formats, meanings) for a specific
purpose
E.g. Ministry of Public Health’s 12-file or 18-file reports
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Vocabularies & Terminologies Controlled Vocabulary
A set of terms used in a specific area where the use of each term is predefined, and the set
maintained by the responsible party
Taxonomy
A hierarchical system to classify objects in a specific area
Terminology
A system or study of terms used to label concepts and their meanings in a specific area
Ontology
“A formal representation of knowledge as a set of concepts within a domain, and the
relationships between those concepts.” (Wikipedia)
Coding System
A system to identify how to represent an object or concept
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Examples ICD-10, ICD-9 Classification System
Coding System
Taxonomy
CPT (Current Procedural Terminology) Classification System
Coding System
Taxonomy
SNOMED CT (Systematized Nomenclature of Medicine - Clinical Terms) Controlled Vocabulary
Terminology
LOINC (Logical Observation Identifiers Names and Codes) Coding System
ICNP, ICPC
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Exchange Standards
Hospital A Hospital B
Clinic C
Government
Lab Patient at Home
Message
Message
Message
MessageMessage
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Exchange Standards Message Exchange Goal: Specify format for exchange of data
Internal vs. external messages
HL7 v.2, HL7 v.3 Messaging, DICOM, NCPDP
Document Exchange Goal: Specify format for exchange of “documents”
HL7 v.3 Clinical Document Architecture (CDA), ASTM Continuity of Care Record (CCR), HL7 Continuity of Care Document (CCD)
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Documents vs. Messages
Clinical Documents
Human Readable
(Ideally) Machine Processable
Messages
Human UnReadable
Machine Processable
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Sample HL7 v.2 Message (Lab Result)
OBX|1|NM|10839-9^TROPONIN-I^LN||5|ng/ml|0-1.3|H||H|F|19980309…
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Sample HL7 v.3 Message (Pt. Regist.)<?xml version="1.0" encoding="UTF-8"?>
<PRPA_IN101311UV02 xmlns="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
ITSVersion="XML_1.0" xsi:schemaLocation="urn:hl7-org:v3 ../schemas/PRPA_IN101311UV02.xsd">
...
<name use="SYL" >
<given>นวนรรน</given>
<family>ธีระอัมพรพันธุ์</family>
</name>
<name use="ABC">
<given>Nawanan</given>
<family>Theera-Ampornpunt</family>
</name>
<administrativeGenderCode code="M"/>
...
</PRPA_IN101311UV02>Message source adapted from Ramathibodi HL7 Project by Supachai Parchariyanon, Kavin Asavanant, Sireerat Srisiriratanakul
& Chaiwiwat Tongtaweechaikit
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Functional Standards Aims for functional interoperability
Example Scenario: Two systems are expected to behave in the same
way with the same trigger event (e.g. once received an electronic
message)
Real-world Example: PDF file viewing by two different viewers
Informatics Example: HL7 EHR Functional Specifications
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How Standards Support Interoperability
Functional
Semantic
SyntacticTechnical Standards (TCP/IP, encryption)
Exchange Standards (HL7 v.2, HL7v.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 EHRFunctional Specifications)
Some may be hybrid: e.g. HL7 v.3, HL7 CCD
Unique ID
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More Standards for Self-Study Medications & Pharmaceutical RxNorm (U.S. National Library of Medicine)
U.S. National Drug Code (U.S. FDA)
Labs (& Others) LOINC (Regenstrief Institute)
Clinical Terminologies SNOMED CT
Organizational/Business ISO 27799 (Information Security Management in Health)
Integration IHE (Integrating the Healthcare Enterprise)
OpenEHR (a hybrid of standards for health information in EHRs)
And many more!