From patient reports to bibliographic retrieval: a Meta-1 front-end

A software front-end has been programmed to help construct Medline query expressions from selected text in clinical records. The user "clicks" to choose pertinent words or phrases from the text with a pointing device and the words are translated into Medical Subject Headings (MeSH). The National Library of Medicine's Unified Medical Language System Meta-1 Thesaurus is used to look up the words selected by the user. The software traces through chains of synonyms to assemble a small set of MeSH indexing terms. The user then makes the final selection from among the MeSH terms and combines chosen terms using logical connectives to form a Medline query which is passed on to Grateful Med. This approach provides the clinical user with a natural starting point, the text of a patient report with no need to know the MeSH terminology. The software handles the translation that otherwise would necessitate looking up terms in MeSH guidebooks, as well as handling the added drudgery of checking out different synonyms. Preliminary evaluation of this approach with clinical trainees indicated that they find the front-end a straightforward way to search for literature relevant to a clinical case. Having a tool for immediate translation from clinical terminology to indexing terminology seems to be an important factor. Apparently minor issues in interface design, such as keeping the clinical report displayed simultaneously along with the search under construction, and keeping both visible during the search itself seem to help orient the user.