title: An information retrieval system for computerized patient records in the context of a daily hospital practice: the example of the Léon Bérard Cancer Center (France).
abstract: BACKGROUND
  A full-text search tool was introduced into the daily practice of Léon Bérard Center (France), a health care facility devoted to treatment of cancer. This tool was integrated into the hospital information system by the IT department having been granted full autonomy to improve the system.
  
  
  OBJECTIVE
  To describe the development and various uses of a tool for full-text search of computerized patient records.
  
  
  METHODS
  The technology is based on Solr, an open-source search engine. It is a web-based application that processes HTTP requests and returns HTTP responses. A data processing pipeline that retrieves data from different repositories, normalizes, cleans and publishes it to Solr, was integrated in the information system of the Leon Bérard center. The IT department developed also user interfaces to allow users to access the search engine within the computerized medical record of the patient.
  
  
  RESULTS
  From January to May 2013, 500 queries were launched per month by an average of 140 different users. Several usages of the tool were described, as follows: medical management of patients, medical research, and improving the traceability of medical care in medical records. The sensitivity of the tool for detecting the medical records of patients diagnosed with both breast cancer and diabetes was 83.0%, and its positive predictive value was 48.7% (gold standard: manual screening by a clinical research assistant).
  
  
  CONCLUSIONS
  The project demonstrates that the introduction of full-text-search tools allowed practitioners to use unstructured medical information for various purposes.
authors.affiliation: Léon Bérard Cancer Center , Lyon, France.
authors.forename: P
authors.initials: P
authors.lastname: Biron
authors.affiliation: Université Lyon I - CNRS-UMR 5558 , Lyon, France.
authors.forename: M H
authors.initials: MH
authors.lastname: Metzger
authors.affiliation: Léon Bérard Cancer Center , Lyon, France.
authors.forename: C
authors.initials: C
authors.lastname: Pezet
authors.affiliation: Léon Bérard Cancer Center , Lyon, France.
authors.forename: C
authors.initials: C
authors.lastname: Sebban
authors.affiliation: SWORD, Saint Didier au Mont d'Or , France.
authors.forename: E
authors.initials: E
authors.lastname: Barthuet
authors.affiliation: Léon Bérard Cancer Center , Lyon, France.
authors.forename: T
authors.initials: T
authors.lastname: Durand
mesh_terms: D035843:Biomedical Research; D005602:France; D055991:Health Records, Personal; D006761:Hospitals; D006801:Humans; D016247:Information Storage and Retrieval; D020407:Internet; D016347:Medical Records Systems, Computerized; D036301:Qualitative Research; D057386:Search Engine; D014584:User-Computer Interface
keywords: Electronic health records; data mining; information storage and retrieval; user-computer interface
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