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Architecture for a Web-Based Clinical Information System that Keeps the Design Open and the Access Closed James J. Cimino, Soumitra Sengupta, Paul D. Clayton, Vimla L. Patel, Andre Kushniruk, Xiaoli Huang - Department of Medical Informatics, Columbia University Centre for Medical Education, McGill University
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Task Create a secure Web-based clinical information system interface...... for patients (PatCIS) Create an environment that will facilitate the rapid prototyping and simplified integration that is conducive to testing new ideas
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Open Architecture Simplify integration Take care of security tasks Track usage Support evaluation
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Closed Access Authorization: –One-user, one-patient authorization Authentication: –User ID and password –SecurID token –Secure Socket Layer encryption –Single-use "log on" form –Session ID –Short time-out –Long time-out –Log out
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User Interface Design Netscape Navigator 4.x Constant set of main function classes "Sub-buttons" are customizable Low-tech, minimal “flash”
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Data Entry Review Advice Education Comments Help Logout patcis.cgi Web Server Web Browser
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Data Entry Review Advice Education Comments Help Logout Java script Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Session Registry
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Session Registry Request Password
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Session Registry Re-enter Password
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Session Registry Usage Log Internet CGI
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Usage Log Internet Link CGI
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Internet Link CGI
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Internet Javascript Link CGI
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Data Entry Review Advice Education Comments Help Logout Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Internet Link CGI
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Data Entry Review Advice Education Comments Help Logout Java script Vital SignsBlood Sugar Data Entry patcis.cgi Web Server Web Browser Session Registry Re-enter Password Usage Log Internet Javascript Link 1 2 3 4 5 6 7 8 9 10 CGI 11
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Integration of Components Applications linked to "Sub-Buttons" Infobuttons inserted into applications
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The Rules 1 - Javascript function handles HREF links 2 - "CGI" hidden variable passed to patcis.cgi 3 - Hidden variables: MRN, USER, SESSION 4 - SYSLOG if accessing clinical database 5 - Open new window where appropriate 6 - Include return code in dynamic documents
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Hypertext Links in PatCIS Instead of: Click Here Use: Click Here
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CGI Calls in PatCIS Instead of: Use:
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Exploitation of Web Resources Patient education sites Newsgroups –Diabetes –PatCIS users Targeted resources –Pubmed –Micromedex Decision support systems –Body mass index calculator –Cholesterol guideline
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Evaluation Log-on "Questionnaire of the Day" Usage log Phone interviews Usability laboratory
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Experience with Our Design Application integration is easy Maintenance is nontrivial Major revision: blocking parts of the EMR
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Mission Accomplished Open Architecture - Integration is simple - Security tasks managed - Tracks usage - Supports evaluation Closed Access - Authorization: modified by MD - Security: continuous authentication
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Columbia University NLM Postdoctoral Fellowships in Medical Informatics James Cimino: 212-305-8127 James.Cimino@columbia.edu. Advanced Degrees in Medical Informatics Stephen Johnson: 212-305-1858 Stephen.Johnson@columbia.edu http://www.cpmc.columbia.edu.
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Columbia University Faculty Position George Hripcsak, MD Department of Medical Informatics DAP-1310 161 Fort Washington Avenue New York, NY 10032 Columbia University is an equal opportunity and affirmative action employer
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