networking and health information exchange unit 7c supporting standards for ehr application
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Networking and Health Information Exchange
Unit 7cSupporting Standards for EHR
Application
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Health IT Workforce Curriculum Version 1.0/Fall 2010
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Unit 7c Objectives• Understand the Infobutton• Understand disease management• Other clinical decision support applications
Component 9/Unit 7c
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Infobutton• Context-sensitive links embedded within a
clinical information system to allow easy retrieval of relevant information
• Functions by generating and sending queries to CDSS using data from EHRs
• CIS displays button next to data such as a diagnosis or abnormal lab data. When clicked, Infobutton formulates a query based on context of the interaction, including patient demographics, activity being performed, and user role.
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Infobutton Manager
• Software that supports implementation of Infobuttons in an application independent manner.
• The application passes parameters to the Infobutton Manager which generates an HTML document with a set of natural language questions that are hyperlinks to clinical information resources.
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Information Resources
• Many resources available– Micromedex– MDConsult– UpToDate– Medline Plus
• Access different– http://resource1/com/search = “azithromycin” AND dose– http://resource2.com/query = “azithromycin” [Mesh Terms] AND
dose [All Fields]– http”//resource3.com/searchConcept = 3333 ^ azithromycin filter
= 11 ^ dosage
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HL7 Infobutton Standard
• Implementations– XML based– URL based
• Terminologies supported– RxNorm– LOINC– SNOMED-CT– MeSH
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Example - Infobutton
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Disease Management• Includes all data and treatments related to
a particular disease• Tracks events
– Reminders for required tests– Identifies patients whose goals are not reached– Tracks compliance– Compares patients
• Manages Workflow
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Order Entry Standards
• Sharing knowledge
• Patient focused
• Meets auditing requirements
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Pseudo-codeHeparin is started and adjusted according to the patient's weight and the last APTT
IF starting heparin drip THEN
Give kg based bolus. Adjust the dose by protocol
IF APTT < 35 THEN
Give 80/kg bolus and increase drip by 4 units/kg.h
Repeat APTT in 6 hours
... Component 9/Unit 7c Health IT Workforce Curriculum
Version 1.0/Fall 2010
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Copyright (C) 2003 Vanderbilt University Medical CenterCopyright (C) 2003 Vanderbilt University Medical Center
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Clem McDonald - Lister Hill Center
CARE - RegenstriefIF TODAY IS NOT AFTER 10/1 & BEFORE 12/31
OR "FLU SHOT LAST" IS AFTER 8/1OR LAST "REFUSED FLU INJ" WAS = 1 & SINCE 1 YEAR AGOOR "DRUG ALLERGIES" WAS = "SERUM ALRGY"
THEN EXIT
IF "AGE" IS GT 65 THEN Consider use of "flu shot AB" if no egg allergy because age places patient in high risk category AND EXIT
IF "X LAST" WAS = ASTHMA" V "COPD" OR "CHEST X-RAY LAST" WAS = "COPD" THEN Consider giving "flu shot AB" if no egg allergy because patient's lung disease places him in high risk category. R:2124 AND EXIT
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Calculation of Framingham Risk
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re information …
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Create the Decision Tree
• Define the decision problem• Identify the decision alternatives• List the possible clinical outcomes of each of the
decision alternatives• Represent the sequence of events leading to the clinical
outcomes by a series of chance nodes and decision nodes
• Choose a time horizon for the problem• Determine the probability of each chance outcome• Assign a value (preference, utility, payoff) to each clinical
outcome
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Simple Decision Tree
Operate
Do not operate
Disease present
Disease present
Disease absent
Disease absent
Outcome; Treatment with disease
Outcome; Treatment without disease
Outcome; Treatment with disease
Outcome; Treatment without disease
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Standard gamble
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What is Evidence-based Practice?
• Traditional conceptualizations– Research utilization– Clinical trials-based– Clinical practice guidelines
• Application of domain knowledge to patient care– Evidence as a continuum
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WebCIS Instrument – Currie et al.
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Summary
• This subunit has presented the HL7 standard Infobutton – a feature that provides context-sensitive access to key knowledge. The value of the Infobutton is that it is easy to implement and use; it can be used for almost any purpose; and it provides trusted links to key knowledge resources. This subunit also illustrated several of the knowledge resources that are available on the Internet.
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