HL7 Health level 7 What is HL7? What does it stand for HL7 Mission HL7 contains message standards HL7 in HealthcareManagement System Standards Limitations of HL7

1. Medical Informatics
Assignment
Topic: Health level Seven/ HL7
Submitted to: Sir adeel Kandhar
submitted by: Maham Yousuf
Roll # 110 dpt 17

2. Content!
• What is HL7?
• What does it stand for
• HL7 Mission
• HL7 contains message standards
• HL7 in Healthcare
Management System
• Standards
• Limitations of HL7

3. What is HL7?
• Health Level-7 or HL7 refers to a set of international standards for transfer of
clinical and administrative data between Hospital information systems. These
standards focus on the application layer, which is "layer 7" in the OSI model. The
HL7 standards are produced by the Health Level Seven International, an
international standards organization, and are adopted by other standards
issuing bodies such as American National Standards Institute and International
Organization for Standardization
• Founded in 1987, Health Level Seven International (HL7) is a not-for-profit,
ANSI-accredited standards developing organization dedicated to providing a
comprehensive framework and related standards for the exchange, integration,
sharing, and retrieval of electronic health information that supports clinical
practice and the management, delivery and evaluation of health services.

4. What does “HL7” stand for?
A domain-specific, common protocol for the
exchange of health care information.
7 Application
6 Presentation
4 Transport
3 Network
2 Data Link
1 Physical
Communication
5 Session
Function

5. Cont..
Application
Type of network communication
(e-mail, telnet, FTP, HL7)
Presentation Data conversion, encryption
Session
Controlling dialogues (sessions).
Establishing, terminating and restarting
connection.
Transport
Network
Data-Link
Physical
TCP/IP
Routing, reliable data
transport between two
computers
Network adapter: Ethernet, wireless
Ethernet
Physical link: Ethernet cable, RS-232,
optical link

6. HL7 Mission Statement
• To provide standards for the exchange, management and
integration of data that supports clinical patient care and the
management, delivery and evaluation of healthcare services.
• ... the complete ‘life cycle’ of a standards specification --
development, adoption, market recognition, utilization and
adherence.

7. Cont..
• HL7 provides standards for interoperability that improve care
delivery, optimize workflow, reduce ambiguity and enhance
knowledge transfer among all of our stakeholders, including
healthcare providers, government agencies, the vendor
community, fellow SDOs and patients. In all of our processes we
exhibit timeliness, scientific rigor and technical expertise without
compromising transparency, accountability, practicality, or our
willingness to put the needs of our stakeholders first.

8. HL7 contains message standards
covering:
• Patient Administration
• Orders for Clinical Services and Observations, Pharmacy, Nutrition and Supplies
order entry
• Patient Accounting and Charges
• Observation Reporting
• Document Management Services
• Appointment Scheduling
• Laboratory Automation
• Personnel Management
• …

9. HL7 in Healthcare
Management System

10. HL7 STANDARDS
Hospitals and other healthcare provider organizations typically have many different computer systems used
for everything from billing records to patient tracking. All of these systems should communicate with each
other (or "interface") when they receive new information but not all do so. HL7 specifies a number of
flexible standards, guidelines, and methodologies by which various healthcare systems can communicate
with each other. Such guidelines or data standards are a set of rules that allow information to be shared
and processed in a uniform and consistent manner. These data standards are meant to allow healthcare
organizations to easily share clinical information. Theoretically, this ability to exchange information should
help to minimize the tendency for medical care to be geographically isolated and highly variable.
• HL7 version 2.x
• HL7 version 3
• Fast Healthcare Interoperability Resources (FHIR)
• Clinical Document Architecture - ISO/HL7 27932

11. Benefits of V3 to Providers
Deals with complexity of the HC environment:
Facilitates integration of
heterogeneous systems
 Increases choices of innovative
best-of-breed solutions
 Provides support for legacy systems
 Allows reliable verification of
vendors’ conformance claims

12. Benefits of V3 to Vendors
 Provides improved protocol for
interconnecting heterogeneous systems
Reduces installation effort
– reduces site-specific negotiations
– simplifies interface programming
Promotes vendor specialization by
allowing segmentation of product
lines into niche market spaces

13. Limitaions
• The list below is some of the functionality that is not provided or supported:
• Security/Access Control – HL7 does not provide for the enforcement of a user’s security
policies. In addition, HL7 does not specify a specific encryption method.
• Privacy/Confidentiality – HL7 does not address this issue and makes no assumption about how
the data will be used at the source or destination of a message.
• Accountability/Audit trails – HL7 does not attempt to define possible transaction processing
features needed in a user’s environment.