HL7 Health level 7

Medical Informatics Assignment

Topic: Health level Seven/ HL7

Submitted to: Sir adeel Kandharsubmitted by: Maham Yousuf

Roll # 110 dpt 17

Content!

• What is HL7?• What does it stand for• HL7 Mission• HL7 contains message standards• HL7 in Healthcare

Management System• Standards• Limitations of HL7

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.

A domain-specific, common protocol for the exchange of health care information.

1 Physical

2 Data Link

3 Network

4 Transport

Communication

5 Session

6 Presentation

7 ApplicationFunction

What does “HL7” stand for?

Cont..

Application Type of network communication(e-mail, telnet, FTP, HL7)

Data conversion, encryptionPresentation

SessionControlling dialogues (sessions). Establishing, terminating and restarting connection.

Transport

Network

Data-Link

Physical

Network adapter: Ethernet, wireless Ethernet

Physical link: Ethernet cable, RS-232, optical link

TCP/IPRouting, reliable data transport between two computers

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.

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.

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

• …

HL7 in HealthcareManagement System

HL7 STANDARDS

• HL7 version 2.x

• HL7 version 3

• Fast Healthcare Interoperability Resources (FHIR)

• Clinical Document Architecture - ISO/HL7 27932

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.

Deals with complexity of the HC environment:

Increases choices of innovative

best-of-breed solutions

Provides support for legacy systems

Allows reliable verification of

vendors’ conformance claims

Benefits of V3 to Providers

Facilitates integration of 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

Benefits of V3 to Vendors

Provides improved protocol for interconnecting heterogeneous systems

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.