The use of morphosemantic regularities in the medical vocabulary for automatic lexical coding.
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The documentation of surgical biopsy reports involves the ordering, processing and retrieval of their informative content. Large amounts of data require computerization, which in turn demands a hierarchical code for optimal exploitation. The best coded nomenclature at present is the Systematized Nomenclature of Medicine (SNOMED), which was developed from the Systematized Nomenclature of Pathology (1965) after a 10-year trial and systematic evaluation. This system is based on the principle of facet classification and was conceived especially for computerized data processing. A microglossary is a strict subset of diagnostic terms for one particular field, which has been chosen from the entire set of medical terms available. The microglossary for computerized processing of biopsy data, which is currently being developed at the Department of Pathology of Graz University, is presented in this paper.
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The authors have given pride of place to an old system, punched cards selectors, which are fairly inexpensive to run, and are very flexible in their use. Each card has a part reserved for identification purposes (a case report number or a dated reference to an indexed list of articles) and another part for identification of a certain number of key-words with their corresponding numerical codings, which are also listed in a thesaurus. These key-words serve both for classifying case reports from each department, and for the bibliographic reference cards. When a series of cases are being studied. However, a new thesaurus has to be established during the course of the study. The 960 possible perforations on the international IBM card are largely sufficient as the number of key-words (case reports or bibliographic card-index codings) is not more than 700 and it is unusual to require more than 900 items during the course of a study. The authors find this system very satisfactory and no longer use large computers.
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