An Overview of the HL7 Context Management Standard ( CCOW )

Transcription

1 An Overview of the HL7 Context Management Standard ( CCOW ) Presented by Eric Weaver Technical Sales Manager, Sentillion, Inc. Eric.Weaver@sentillion.com

2 The Challenge Users in need of easy, secure access to applications: physicians, nurses, therapists, administrators, etc. Multiple disparate applications: labs, meds, cardiology, scheduling, billing, etc. Shared as well as personal workstations: hospitals, clinics, offices, homes, etc.

3 HL7 CCOW Technical Committee WHAT: Couple, Coordinate, Synchronize Applications at Point-of-Use. HOW: WHY: Easy Standard Using Component-Based Technology. Providers: Flexibility to Choose Applications They Want. Vendors: Faster to Market with Best-of-Class Solutions. Everyone: Out-of-the-Box Integration.

4 What They re Saying With CCOW, healthcare CIOs have an unparalleled opportunity to link their myriad applications together, achieving the oft-stated goal of getting the right information to the right person at the right time. It's difficult to overstate the significance of this breakthrough because it means physicians finally have intuitive access to the entire breadth and depth of clinical information. Leslie Kelly Hall, CIO, St. Alphonsus Regional Medical Center, Boise

5 Example: Patient Link Nancy Furlow

6 Technology Neutral Standard Technology Neutral Context Management Architecture 200 pgs 40 pgs Technology Specific Component Mapping 30 pgs Technology- Neutral Subject Data Defn s COM Web (SOAP) 15 pgs Technology Specific User Interface Windows/Browser (Swing) (other)

7 Standard Context Subjects Identity Subjects (identify things): User Patient Encounter Observation DICOM Study, Component, Series, Instance View Annotation Subjects (describe things): Certificate Action Subjects (do things): Authenticate User

8 Subject Capabilities Secure Subjects - Only applications with access privileges may set or get (e.g., User) Dependent Subjects - The value of a subject must be consistent with the value for another subject (e.g., Encounter depends on Patient) Custom Subjects - May be defined by healthcare providers and/or vendors, distinct from HL7 s standard subjects

9 Component Architecture Disparate Applications / CCOW Interfaces CCOW CCOW Context Manager Mapping Agent Annotation Agent Action Agent Copyright HL7 Sentillion, Inc.

10 Context Change Process (1) User selects the patient of interest from any application on the clinical desktop (2)Application tells the context manager to start a context change transaction and sets the context data to indicate the newly selected patient. (6) If one or more of the applications cannot or prefers not to apply the new context, the user is asked to decided whether to continue, or cancel. Application XX Context Manager Application YY (5) Each application indicates whether or not it can apply the new context. (4)Context manager tells the other applications that a new patient context has been proposed. The context manager surveys the applications to determine whether each can apply the new context. (7)Context manager tells each application to apply new context, or that the transaction has been cancelled. (3) Context manager tells patient mapping agent that context change is occurring; mapping agent supplies the context manager with other identifiers by which the patient is known. Patient Mapping Agent (Optional) Application ZZ (8) Each application applies the new context if instructed to do so by the context manager. Each application gets the new patient context from the context manager.

11 s Client-Centric Server-Centric Context Manager DB Agent DB Web Server Agent Web Server Context Manager Copyright HL7 Sentillion, Inc.

12 Interface Architecture Application #1 Application #N CP CP CM SB SD CD Context Manager CF Common Context Data II Tool, etc. Interface Legend CP context participant CM context manager CF context filter CD context data SB secure binding SD secure context data II implementation interface CA context agent CA Optional Context Agent s II Tool, etc.

13 Web Interface Mapping Notifier applet Listener applet Application #1 Application #N CP CP CM SB SD CD CMR CF Context Manager Common Context Data II Tool, etc. Context Management Registry Interface Legend CP context participant CM context manager CF context filter CD context data SB secure binding SD secure context data II implementation interface CA context agent AR authentication repository CMR context management registry CA Optional Context Agent s AR SB Optional External Authentication Repository II II Tool, etc. Tool, etc.

14 ActiveX Interface Mapping Application #1 Application #N CP CP CM SB SD CD Context Manager Windows Registry Interface Legend CP context participant CM context manager CF context filter CD context data SB secure binding SD secure context data II implementation interface CA context agent AR authentication repository CF CA Common Context Data Optional Context Agent s AR SB II II Tool, etc. Tool, etc. Optional External Authentication Repository II Tool, etc.

15 CCOW Standard Status 1.0 (Ratified April 1999) Component Architecture Common Links: Patient Link Secure Links: User Link Component Interfaces for: Applications Context Manager Patient Mapping Agent User Mapping Agent Authentication Repository Technology Mapping to COM User Interface for Windows 1.1 (Ratified January 2000) Inter-dependent Subjects: Encounter Link Custom Subjects and Items Conformance Statements 1.2 (Ratified May 2000) Technology Mapping to Web 1.3 (Ratified January 2001) Additional Security Capabilities Annotation Agents Observation Link Digital Certificate Annotation 1.4 (Ratified January 2002) Action Subjects (Authenticate User) DICOM Study Link Multiple User Contexts / One Device Change Event Filters 1.5 (Membership Ballot Spring 2004) View Link for synchronizing displays Added PKI for Secure Binding

16 Additional Information Web Sites: Health Level Seven, List server: (see HL7 web site to join) Co-Chairs: Robert Seliger, Sentillion, Barry Royer, Siemens Medical Solutions, Dr. Michael Russell, Duke University Medical Center,