November 13, 2007

This directory contains data files with controlled terminology used by the
U.S. Food and Drug Administration (FDA) Center for Devices and Radiological
Health (CDRH) and maintained as distinct terminology subsets in NCI Thesaurus.

Three sets of CDRH terminology are covered by these files:
1. Medical Device Component Or Accessory Terminology FDA CDRH 
2. Medical Device Problem Codes FDA CDRH 
3. Patient Problem Codes FDA CDRH 

** Important Change: Revised Data Format **

FDA requested, and has approved, a revised format and contents for the CDRH
files.  The current files are significantly different from those published
previously, which followed the approach used for other FDA terminology sets.
To avoid confusion, all files using the earlier format are now in a separate
subdirectory of the Archive directory.
 
Contents - Files:

FDA-CDRH_NCIt_Subsets.txt   (CDRH subsets in NCI Thesaurus: tabbed text)
FDA-CDRH_NCIt_Subsets.xls   (CDRH subsets in NCI Thesaurus: Excel)
ReadMe.txt                  (this file)

Contents - Directories:

Archive                     (dated/earlier file versions)

Background:

Additional documentation, data files, and related information are 
available on this Web page:
     http://www.cancer.gov/cancertopics/terminologyresources/FDA