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HL7 and Version
The Reference Information Model ( RIM ) and the HL7 Development Framework ( HDF ) are the basis of the HL7 Version 3 standards development process.
* Clinical Document Architecture ( CDA ) – an exchange model for clinical documents, based on HL7 Version 3
* Structured Product Labeling ( SPL ) – the published information that accompanies a medicine, based on HL7 Version 3
The Reference Information Model ( RIM ) is the cornerstone of the HL7 Version 3 development process and an essential part of the HL7 V3 development methodology.
The HL7 RIM, vocabulary specifications, and model-driven process of analysis and design combine to make HL7 Version 3 one methodology for development of consensus-based standards for healthcare information system interoperability.

HL7 and 3
The first mutually published standard is ISO / HL7 21731: 2006 Health informatics — HL7 version 3 — Reference information model — Release 1.
The HL7 version 3 standard has the aim to support all healthcare workflows.
The HL7 version 3 messaging standard defines a series of electronic messages ( called interactions ) to support all healthcare workflows.
AORTA uses HL7 version 3 messages and documents as its core mechanism for information exchange.
Nictiz coordinates its efforts with regard to the usage of HL7 version 3 with the volunteers of HL7 the Netherlands.
EDIfact will be slowly replaced by HL7 version 3.
HLH basic theme is to target health care information exchange and interoperability using HL7 version 3.
The American Recovery and Reinvestment Act of 2009 ( ARRA ) and Health Information Technology for Economic and Clinical Health Act ( HITECH ) legislation specified HL7 versions 2. 3. 1 and 2. 5. 1, and the HL7 Continuity of Care Document ( CCD ), as the healthcare standards to meet certain certification requirements.
HL7 maintains its own OID registry, and as of January 1, 2008 it contained almost 3, 000 nodes, most of them under the HL7 root.

HL7 and Development
HL7 Development Framework-ISO / HL7 27931

HL7 and Framework
The HL7 Services-Aware Enterprise Architecture Framework ( SAIF ) provides consistency between all HL7 artifacts, and enables a standardized approach to Enterprise Architecture ( EA ) development and implementation, and a way to measure the consistency.
* NIST HL7 Conformance Testing Framework

HL7 and HDF
HDF is a project to specify the processes and methodology used by all the HL7 committees for project initiation, requirements analysis, standard design, implementation, standard approval process, etc.
The HDF is the most current edition of the HL7 V3 development methodology.
The HDF not only documents messaging, but also the processes, tools, actors, rules, and artifacts relevant to development of all HL7 standard specifications.
Eventually, the HDF will encompass all of the HL7 standard specifications, including any new standards resulting from analysis of electronic health record architectures and requirements.

HL7 and is
Diagnosis Report is sent back to HIS via HL7 usually and Images are sent back to HIS via DICOM usually if there is a DICOM Viewer integrated with HIS in hospitals ( In most of cases, Clinical Physician gets reminder of Diagnosis Report coming and then queries images from PACS Server ).
Health Level Seven ( HL7 ), is a non-profit organization involved in the development of international healthcare informatics interoperability standards.
HL7 is an international community of healthcare subject matter experts and information scientists collaborating to create standards for the exchange, management and integration of electronic healthcare information.
The HL7 community is organized in the form of a global organization ( Health Level Seven, Inc .) and country-specific affiliate organizations:
* Health Level Seven, Inc. ( HL7, Inc. ) is headquartered in Ann Arbor, Michigan.
The organizational structure of HL7 Inc. is as follows:
The Working Group is responsible for defining the HL7 standard protocol and is composed of Standing Administrative Committees and Working Groups.
HL7, Inc. is a standards organization that was accredited in 1994 by the American National Standards Institute ( ANSI ).
HL7 is one of several American National Standards Institute accredited Standards Developing Organizations ( SDOs ) operating in the healthcare arena.
However, HL7 is now adopted by ISO as a centre of gravity in international standardization and accredited as a partnering organization for mutual issuing of standards.
About 45 % of the global membership ( of either HL7 Inc. or an HL7 affiliate ) is located in Europe, 35 % in North America, 15 % in Asia-Oceania and 5 % elsewhere.
The revenue model and business plan of HL7 is discussed in HL7 Strategic Initiatives and Implementation Proposal.
However, since the earlier policy as described in the Bylaws of October 2002 placed the HL7 protocol specifications in the Public Domain, and under 17 USC § 102 there is no copyright protection for an " idea, procedure, process, system, method of operation, concept, principle, or discovery ", this revised policy may not be enforceable.
RIM is the representation of the HL7 clinical data ( domains ) and the life cycle of messages or groups of messages.
Currently, HL7 ’ s v2. x messaging standard is supported by every major medical information systems vendor in the United States.

HL7 and specifications
HL7 specifications draw upon codes and vocabularies from a variety of sources.
The V3 vocabulary work ensures that the systems implementing HL7 specifications have an unambiguous understanding of the code sources and code value domains they are using.

HL7 and facilitate
* Administering the HL7 Canada Constituency forum to facilitate member collaboration.

HL7 and interoperability
* Common Terminology Services, an HL7 ANSI standard of requirements for interoperability across disparate healthcare applications
As of Sept 4, 2012, the HL7 Board of Directors has announced its intention to relax this policy and allow free access and implementation to promote adoption and interoperability, as described in their press release.
HL7 v2. x has allowed for the interoperability between electronic Patient Administration Systems ( PAS ), Electronic Practice Management ( EPM ) systems, Laboratory Information Systems ( LIS ), Dietary, Pharmacy and Billing systems as well as Electronic Medical Record ( EMR ) or Electronic Health Record ( EHR ) systems.

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