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Health 2.0
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Hack-a-Thon
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Sponsored
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by
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HHS
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and
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NIH,
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the
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Health
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2.0
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Hack-a-Thon
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challenged
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developers
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to
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create
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interesting
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demos
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of
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what
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can
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be
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done
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with
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the
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diverse
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government
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health
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related
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data-sets.
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Developers
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were
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only
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given
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eight
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hours
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for
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the
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challenge.
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Larry
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Brem
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had
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an
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idea
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to
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combine
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the
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Veteran's
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Administration's
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Blue
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Button
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initiative
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with
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the
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LexEVS
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REST
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API
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to
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annotate
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text
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files
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with
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the
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medication
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descriptions
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from
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the
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NCI
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terminologies.
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If
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you
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would
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like
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to
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know
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more
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about
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what
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this
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demonstrates
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and
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how
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to
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do
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it,
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please
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use
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our
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forums
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link
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and
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refer
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to
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LexEVS
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Developer
...
or
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the
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contact
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us
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link
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to
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ask
...
questions.
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A
...
...
has
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been
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released
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by
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Larry
...
Brem
...
demonstrating
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how
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this
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function
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works.
Script
The final script uses Greasemonkey to modify the sample text file after it has been loaded by the browser. Annotations were added to the listed medications. The original Blue Button text contains data from a sample My HealtheVet Personal Health Record and is just plain text with no metadata.
After the script parses and adds the medication annotations a more detailed description of the medication can be seen by hovering over it.
Implementation
The Greasemonkey script uses a simple regular expression to find each line containing medication. The extracted line is then parsed and the resulting medication name is passed to the LexEVS REST service by using the following URL (where medicineName is replaced with the parsed medication name):
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h2. Script The final script uses [Greasemonkey|http://en.wikipedia.org/wiki/Greasemonkey] to modify the [sample text file|http://www.va.gov/BLUEBUTTON/docs/VA_My_HealtheVet_Blue_Button_Sample_Version_11_2_All_Data.txt] after it has been loaded by the browser. Annotations were added to the listed medications. The original Blue Button text contains data from a sample My HealtheVet Personal Health Record and is just plain text with no metadata. !VA_no_annotations.png|alt="screenshot of data with no annotations"! After the script parses and adds the medication annotations a more detailed description of the medication can be seen by hovering over it. !VA_annotations.png|alt+"screenshot of data with annotation"! h2. Implementation The Greasemonkey script uses a simple regular expression to find each line containing medication. The extracted line is then parsed and the resulting medication name is passed to the LexEVS REST service by using the following URL (where medicineName is replaced with the parsed medication name): {code}http://lexevsapi.nci.nih.gov/lexevsapi50/GetXML?query=org.LexGrid.concepts.Concept,org.LexGrid.commonTypes.EntityDescription&org.LexGrid.commonTypes.EntityDescription[@_content=*"+medicineName+"*]&codingSchemeName=NCI_Thesaurus{code} |
The
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LexEVS
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REST
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service
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returns
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an
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XML
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document
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containing
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all
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the
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information
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for
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the
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desired
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entity.
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XPath
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was
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used
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to
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parse
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the
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returned
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XML
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document
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for
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the
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desired
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medication
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description.
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Obtaining
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the
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Script
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The
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script
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requires
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the
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extension
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to
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be
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installed
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in
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your
...
...
browser.
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Then
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just
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click
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on
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the
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nci-blue.user.js
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file
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on
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the
...
...
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and
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Greasemonkey
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will
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prompt
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you
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to
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install
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the
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user
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script.
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Go
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to
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the
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...
...
...
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to
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see
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the
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result.
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A
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full
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plugin
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to
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Firefox
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was
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also
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created
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and
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can
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be
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found
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on
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the
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same
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...
...
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.
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Greasemonkey
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is
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not
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required
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for
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the
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full
...
plugin.
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Just
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click
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on
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the
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nciblue.xpi
...
file
...
and
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Firefox
...
will
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prompt
...
you
...
to
...
install
...
the
...
extension.
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