title: A clinical decision support tool to screen health records for contraindications to stroke thrombolysis-a pilot study.
abstract: BACKGROUND
  The use of intravenous thrombolysis for stroke is limited by contraindications that may be difficult to identify promptly and accurately. Evidence supports the use of information technology-based clinical decision support (CDS) tools to achieve improvements in care delivery. The objective of this pilot study was to investigate the efficacy of a CDS tool to screen health records for contraindications to intravenous stroke thrombolysis.
  
  
  METHODS
  A CDS tool was developed to rapidly screen health information in seven affiliated hospitals for contraindications to stroke thrombolysis. A fixed-sequence, 2-period crossover study was conducted to test the efficacy of the CDS tool. Four mock patient records derived from the stroke registry that contained a total of nine contraindication items in two or more of the hospitals were used for testing purposes. The test patients were preset and balanced between groups with and without the CDS tool appearing six times in each group before recruiting the participating physicians. Physicians who were responsible for thrombolytic therapy and willing to sign informed consent were recruited. The participating physicians were asked to check a list of contraindications for two of the patients by using a shared electronic medical record system among the seven hospitals with and without the CDS tool. The test time and missed contraindications were recorded and analyzed statistically.
  
  
  RESULTS
  A total of 14 physicians who were responsible for stroke thrombolysis were approached, and 12 signed informed consent and took the test. By using the CDS tool, the test time was reduced significantly from 14.6 ± 7.4 to 7.3 ± 5.2 min (P = 0.010). In a total of 54 contraindications, the number of missed contraindications was reduced significantly from 23 (42.6 %) to seven (13.0 %) (P = 0.001). The difference of missed contraindication number between the two groups was statistically significant either per physician or per contraindication item.
  
  
  CONCLUSIONS
  By screening health records for relevant contraindications, the use of a CDS tool may reduce the time needed to review medical records and reduce the number of missed contraindications for stroke thrombolysis.
authors.affiliation: Stroke Center and Department of Neurology, Changhua Christian Hospital, #135, Nanhsiao Street, Changhua, 500, Taiwan. sunmc@yahoo.com.
authors.forename: Mu-Chien
authors.initials: MC
authors.lastname: Sun
authors.affiliation: Stroke Center and Department of Neurology, Changhua Christian Hospital, #135, Nanhsiao Street, Changhua, 500, Taiwan.
authors.forename: Jo-Ann
authors.initials: JA
authors.lastname: Chan
mesh_terms: D000328:Adult; D020000:Decision Support Systems, Clinical; D057286:Electronic Health Records; D005260:Female; D006751:Hospital Information Systems; D006801:Humans; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D020521:Stroke / Q000188:drug therapy*; D013624:Taiwan; D015912:Thrombolytic Therapy