Health Informatics Glossary
Uniform Bill version 1992.
University of California at Davis
Health System. See
Universal Description, Discovery, and Integration was a platform-independent,
XML-based registry for businesses worldwide to list themselves on the Internet,
and a mechanism to register and locate web service applications. Sponsored by
OASIS and launched in 2000, the effort peaked after a few years. In 2012
Microsoft initiated removal of UDDI services from future versions of Windows
In physics, the term "ultrasound" refers to all acoustic energy (longitudinal,
mechanical wave) with a frequency above the audible range of human hearing. The
audible range of sound is from 20 hertz to 20 kilohertz, therefore an
ultrasound is a frequency greater than 20 kilohertz.
In software engineering, the Unified Modeling Language (UML) is a
general-purpose modeling language that includes a graphical notation used to
create an abstract model of a system, referred to as a UML model.
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The Unified Medical Language
System, maintained by the U.S. National
Library of Medicine, integrates and distributes key terminology,
classification and coding standards, and associated resources to promote
creation of more effective and interoperable biomedical information systems
and services, including electronic health records.
Unsecured PHI -
Protected Health Information (PHI) that is not secured through the use of
encryption or manual destruction.
The Uniform Resource Locator, created in 1994 by
RFC 1738, established the
initial syntax and semantics of formalized path names for location and access
of resources via the Internet.
Unit Test -
A standard acceptance testing process by which the elements of a system are
individually and comprehensively tested.
Unique Provider Identification Number, a six character alphanumeric identifier
assigned to all Medicare physician and non-physician providers.
United States Air Force. See
Uniform Serial Bus.
Use Case -
A use case is a narrative solution in software and systems engineering to
capture the functional requirements of a system. The
AHIC Use Cases,
developed by ONC during the Bush Administration, sought to characterize the
system requirements of the
The AHIC Use Cases ultimatelty failed to accelerate development of agile and
adoptable health IT interoperability solutions due to an impenetrable
complexity and marginal operational utility. The NHIN Direct
User Stories are a lighter
weight successor that may sought to be relevant via functional constraints
which limit the complexity of each "story" to simple responsibility for point
to point transport.
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User Interface -
The method by which a user interacts with a machine, such as operating a
computer by using a keyboard along with a mouse pointing device to interact
with the machine.