Publication and Discovery XDS and DSUB IHE IT Infrastructure Webinar Series

IT Infrastructure Planning Committee XDS Cross-Enterprise Document Sharing

IT Infrastructure Planning Committee What is XDS ? The Cross-Enterprise Document Sharing (XDS) IHE Integration Profile facilitates the registration, distribution and access across health enterprises of patient electronic health records It provides a standards-based specification for managing the sharing of documents between any healthcare enterprise Currently only one XDS profile, based on Web Services - XDS.b (original XDS.a is now depreciated)

IT Infrastructure Planning Committee XDS Affinity Domains Group of healthcare enterprises that have agreed to work together using a common set of policies and standards-based infrastructures for sharing patient clinical documents, using XDS: Regional community of careRegional community of care Nationwide EHRNationwide EHR Specialized or disease-oriented (cardio, diabetes, oncology)Specialized or disease-oriented (cardio, diabetes, oncology) Government-sponsored or federation of enterprisesGovernment-sponsored or federation of enterprises Insurance provider supported communitiesInsurance provider supported communities XDS profile is designed to accommodate a wide range of policies on: Patient identification and consentPatient identification and consent Controlling access to informationControlling access to information Format, content, structure, and representation of clinical informationFormat, content, structure, and representation of clinical information

IT Infrastructure Planning Committee Some Common Scenarios ePharmacy between ward and pharmacy departments within a hospitalePharmacy between ward and pharmacy departments within a hospital eReferral between primary and secondary care providerseReferral between primary and secondary care providers Patient Care Summary (e.g. within a region)Patient Care Summary (e.g. within a region) –Publishing of Care Summaries by providers –Access to patient’s Care Summary in an emergency Sharing of radiology reports and images between facilitiesSharing of radiology reports and images between facilities

IT Infrastructure Planning Committee Main Entities and Responsibilities A document Repository is responsible for storing documents in a transparent, secure, reliable and persistent manner and responding to document retrieval requests.A document Repository is responsible for storing documents in a transparent, secure, reliable and persistent manner and responding to document retrieval requests. A document Registry is responsible for storing information about those documents so that the documents of interest for the care of a patient may be easily found, selected and retrieved irrespective of the repository where they are actually stored.A document Registry is responsible for storing information about those documents so that the documents of interest for the care of a patient may be easily found, selected and retrieved irrespective of the repository where they are actually stored.Notes: Analogous to a library (book repository) and catalog/indexAnalogous to a library (book repository) and catalog/index The Registry does not have access to the documents – an important separation from security and privacy perspectiveThe Registry does not have access to the documents – an important separation from security and privacy perspective Multiple Repositories can be linked to one RegistryMultiple Repositories can be linked to one Registry

IT Infrastructure Planning Committee Consumer Registry Repository 1. Sources post document packages to the Repository 2. Repository registers the documents metadata and pointer with the Registry 3. Consumers search for documents with specific information 4. Consumers retrieve selected documents from Repository (-ies) XDS Document (Metadata): Type Patient Author Facility Authenticator … XDS Document (Metadata): Type Patient Author Facility Authenticator … Source of Documents XDS Flow and Interactions

IT Infrastructure Planning Committee XDS.b Formal Diagram Patient Identity Source Document Registry Document Repository Document Source Document Consumer Patient Identity Feed [ITI-8] Patient Identity Feed HL7v3 [ITI-44] Provide&Register Document Set-b [ITI-41] Retrieve Document Set [ITI-43] Registry Stored Query [ITI-18] Register Document Set-b [ITI-42] Integrated Document Source/Repository

IT Infrastructure Planning Committee XDS.b Actors Document Source – producer and publisher of documents, responsible for sending documents and their metadata to a Document Repository actorDocument Source – producer and publisher of documents, responsible for sending documents and their metadata to a Document Repository actor Document Repository is responsible for both the persistent storage of these documents as well as for their registration with the appropriate Document RegistryDocument Repository is responsible for both the persistent storage of these documents as well as for their registration with the appropriate Document Registry Document Registry maintains metadata about each registered document and a link to the Document in the Repository where it is stored. Responds to queries from Document Consumer actors about documents meeting specific criteria.Document Registry maintains metadata about each registered document and a link to the Document in the Repository where it is stored. Responds to queries from Document Consumer actors about documents meeting specific criteria. Document Consumer queries a Document Registry for documents meeting certain criteria, and retrieves selected documents from one or more Document Repository actorsDocument Consumer queries a Document Registry for documents meeting certain criteria, and retrieves selected documents from one or more Document Repository actors Patient Identity Source facilitates the validation of patient identifiers by the Registry Actor in its interactions with other actors by providing unique identifier for each patient and maintaining a collection of identity traitsPatient Identity Source facilitates the validation of patient identifiers by the Registry Actor in its interactions with other actors by providing unique identifier for each patient and maintaining a collection of identity traits Integrated Document Source/Repository combines the functionality of the Document Source and Document Repository actors into a single actor that does not expose the Provide and Register Document Set transactionIntegrated Document Source/Repository combines the functionality of the Document Source and Document Repository actors into a single actor that does not expose the Provide and Register Document Set transaction

IT Infrastructure Planning Committee XDS.b Transactions (1) Provide and Register Document Set – For each document in the submitted set, the Document Source Actor provides both the documents as an opaque octet stream and the corresponding metadata to the Document Repository. The Document Repository is responsible to persistently store these documents, and to register them in the Document Registry using the Register Documents transaction.Provide and Register Document Set – For each document in the submitted set, the Document Source Actor provides both the documents as an opaque octet stream and the corresponding metadata to the Document Repository. The Document Repository is responsible to persistently store these documents, and to register them in the Document Registry using the Register Documents transaction. Register Document Set allows a Document Repository Actor to register one or more documents with a Document Registry, by supplying metadata about each document to be registered. This document metadata will be used to create an XDS Document Entry in the registry.Register Document Set allows a Document Repository Actor to register one or more documents with a Document Registry, by supplying metadata about each document to be registered. This document metadata will be used to create an XDS Document Entry in the registry.

IT Infrastructure Planning Committee XDS.b Transactions (2) Patient Identity Feed conveys the patient identifier and corroborating demographic data, in order to populate the Document Registry with patient identifiers that have been registered for the XDS Affinity Domains. (At least one of the options [ITI-8] or [ITI-44] should be supported.)Patient Identity Feed conveys the patient identifier and corroborating demographic data, in order to populate the Document Registry with patient identifiers that have been registered for the XDS Affinity Domains. (At least one of the options [ITI-8] or [ITI-44] should be supported.) Registry Stored Query is issued by the Document Consumer Actor to a Document Registry. It will return registry metadata containing a list of document entries found to meet the specified criteria including the locations and identifier of each corresponding document in one or more Document Repositories.Registry Stored Query is issued by the Document Consumer Actor to a Document Registry. It will return registry metadata containing a list of document entries found to meet the specified criteria including the locations and identifier of each corresponding document in one or more Document Repositories. Retrieve Document Set – initiated by a Document Consumer. The Document Repository shall return the document set that was specified by the Document Consumer.Retrieve Document Set – initiated by a Document Consumer. The Document Repository shall return the document set that was specified by the Document Consumer.

IT Infrastructure Planning Committee XDS.b Actors and Transactions ActorsTransactionsOptionalitySection Document Consumer Registry Stored Query [ITI-18] Retrieve Document Set [ITI-43] RR ITI TF-2a: 3.18 ITI TF-2b: 3.43 Document Source Provide and Register Document Set-b [ITI-41] R ITI TF-2b: 3.41 Document Repository Provide and Register Document Set-b [ITI-41] Register Document Set-b [ITI-42] Retrieve Document Set [ITI-43] RRR ITI TF-2b: 3.41 ITI TF-2b: 3.42 ITI TF-2b: 3.43 Document Registry Register Document Set-b [ITI-42] R Registry Stored Query [ITI-18] R Patient Identity Feed [ITI-8] Patient Identity Feed HL7v3 [ITI-44] RR O (Note 2) ITI TF-2b: 3.42 ITI TF-2a: 3.18 ITI TF-2a: 3.8 ITI TF-2b: 3.44 Integrated Document Source/Repository Register Document Set-b [ITI-42] Retrieve Document Set [ITI-43] RR ITI TF-2b: 3.42 ITI TF-2b: 3.43 Patient Identity Source Patient Identity Feed [ITI-8] Patient Identity Feed HL7v3 [ITI-44] O (Note 1,2) ITI TF-2a: 3.8 ITI TF-2b :3.44

IT Infrastructure Planning Committee XDS Document Content Types XDS profile is content agnostic – it can be used with a variety of document types, e.g.: XDS-SD: Scanned document, plain text or PDF/A, in HL7 CDA R2 formatXDS-SD: Scanned document, plain text or PDF/A, in HL7 CDA R2 format XDS-MS: Medical summary in HL7 CDA formatXDS-MS: Medical summary in HL7 CDA format XDS-I: Radiology report in plain text of PDF format, or reference to a collection of DICOM SOP Instances in a manifest document in the DICOM Key Object Selection formatXDS-I: Radiology report in plain text of PDF format, or reference to a collection of DICOM SOP Instances in a manifest document in the DICOM Key Object Selection format

IT Infrastructure Planning Committee XDS.b – Actors and Options ActorsOptionsReference Document Source Document ReplacementITI TF-1: Document AddendumITI TF-1: Document TransformationITI TF-1: Folder ManagementITI TF-1: Basic Patient Privacy EnforcementITI TF-2b: Document Repository Document Registry Patient Identity Source Patient Identity FeedITI TF-2a: 3.8 Patient Identity Feed HL7v3ITI TF-2b: 3.44 Document Consumer Basic Patient Privacy Enforcement ITI TF-2a: ITI TF-2b: Basic Patient Privacy ProofITI TF-2a:

IT Infrastructure Planning Committee Security and Privacy Considerations All actors be grouped with a ATNA Secure Node ActorAll actors be grouped with a ATNA Secure Node Actor Each member of the XDS Affinity Domain should have audit and security mechanisms in placeEach member of the XDS Affinity Domain should have audit and security mechanisms in place Transactions used between different secure domains shall use the ATNA Encryption OptionTransactions used between different secure domains shall use the ATNA Encryption Option Each transaction will result in audit recordsEach transaction will result in audit records

IT Infrastructure Planning Committee XDS Affinity Domain PMS Physician Office EHR System Teaching Hospital Community Clinic Lab Info. System PACS Retrieve Document Provide & Register Register Document (using Patient ID) Query Document (using Patient ID) Document Registry Document Repository ED Application PIX or PDQ Query PIX or PDQ Query ATNA CT Audit record repository Time server Patient Demographics Supplier Record Audit Event Maintain Time Maintain Time Maintain Time XDS Workflow Health Information Exchange Network M L-716 A87631 M A L-716 Patient Identity XRef Mgr Record Audit Event

IT Infrastructure Planning Committee References Infrastructure – see ITI TF-2x: Appendix V, including: WS-I ProfilesWS-I Profiles WS-* SpecificationsWS-* Specifications Request/Response and Document Content HL7 CDAHL7 CDA CEN ENV 13606CEN ENV ASTM 4400CCRASTM 4400CCR DCOMDCOM ebRIMebRIM ebRSebRS

IT Infrastructure Planning Committee Flexible Infrastructure Health Information Exchange Publish Pull Structured objects Pull Send to Switch Send to Write Read Interchange Media XDS XDR XDM Replace with agreed new version of this slide

IT Infrastructure Planning Committee Who Is Using XDS?

IT Infrastructure Planning Committee DSUB Document Metadata Subscription supplement

IT Infrastructure Planning Committee DSUB Overview The Document Metadata Subscription (DSUB) supplement contains two related parts: Publish/Subscribe Infrastructure: General framework for defining web-services based publish/subscribe interactionsPublish/Subscribe Infrastructure: General framework for defining web-services based publish/subscribe interactions Document Metadata Subscription (DSUB) Integration Profile: Use of subscriptions within an XDS Affinity Domain or across communitiesDocument Metadata Subscription (DSUB) Integration Profile: Use of subscriptions within an XDS Affinity Domain or across communities

IT Infrastructure Planning Committee Publish/Subscribe Infrastructure New Volume 3 section 4.4New Volume 3 section 4.4 Presents a framework for building event-driven information exchange patterns using a publish/subscribe data exchange modelPresents a framework for building event-driven information exchange patterns using a publish/subscribe data exchange model Defines the transport of publish, subscribe and notify messages.Defines the transport of publish, subscribe and notify messages. Supports IHE profiles which define the use case specific content to be carried in the publish, subscribe and notify messagesSupports IHE profiles which define the use case specific content to be carried in the publish, subscribe and notify messages –Document Metadata Subscription (DSUB) first profile to use this framework.

IT Infrastructure Planning Committee Publish/Subscribe Infrastructure Actors and Transactions Publisher Publish Notification Broker Notification Recipient Subscriber Subscribe Notify

IT Infrastructure Planning Committee Possible Combined Actors Publisher Notification Broker Notification Recipient Subscriber Subscribe Notify Publish Publisher Notification Broker Notification Recipient Subscriber Subscribe Notify Notification Broker Notification Recipient Subscriber Subscribe Notify Publisher

IT Infrastructure Planning Committee Document Metadata Subscription (DSUB) Integration Profile Defines a subscription which allows for the matching of metadata during the publication of a new document for a given patient, and results in the delivery of a notification.Defines a subscription which allows for the matching of metadata during the publication of a new document for a given patient, and results in the delivery of a notification. Enabled within an XDS Affinity Domain or XCA environmentEnabled within an XDS Affinity Domain or XCA environment Use CasesUse Cases –Emergency Department: Notification of new document availability during treatment –Primary Care Management: PCP receives notification when new documents for patient are available

IT Infrastructure Planning Committee DSUB Actors and Transactions Document Metadata Publisher Document Metadata Publish [ITI-54] Document Metadata Notification Broker Document Metadata Notification Recipient Document Metadata Subscriber Document Metadata Subscribe [ITI-52] Document Metadata Notify [ITI-53]

IT Infrastructure Planning Committee Transactions Document Metadata Subscribe : start a subscription for a particular topic and filtering within that topic. Supports full and minimal notifications and where to send the notification.Document Metadata Subscribe : start a subscription for a particular topic and filtering within that topic. Supports full and minimal notifications and where to send the notification. Document Metadata Notify : send a notification about the availability of a document or documents of interest, based on the subscribers' filters on selected topicsDocument Metadata Notify : send a notification about the availability of a document or documents of interest, based on the subscribers' filters on selected topics Document Metadata Publish : notify that an event occurred for which there may be a subscription.Document Metadata Publish : notify that an event occurred for which there may be a subscription.

IT Infrastructure Planning Committee DSUB Illustration of Use Publisher Notification Broker Notification Recipient Subscriber Subscribe Publish Publish Notify Notify Unsubscribe Publish

IT Infrastructure Planning Committee DSUB Implementation DSUB topic treeDSUB topic tree –ihe:FullDocumentEntry : subscribes to Document Entry registration events; the notification shall contain the full metadata describing each matching Document Entry – ihe:MinimalDocumentEntry : subscribes to Document Entry registration events; the notification shall contain a minimal set of data (identifiers only) describing each matching Document Entry DSUB StandardsDSUB Standards –Web Services Standards WS-BaseNotification 1.3 OASIS StandardWS-BaseNotification 1.3 OASIS Standard WS-BrokeredNotification 1.3 OASIS StandardWS-BrokeredNotification 1.3 OASIS Standard WS-Topics 1.3 OASIS StandardWS-Topics 1.3 OASIS Standard ITI TF-2x: Appendix VITI TF-2x: Appendix V –Filter expression Registry Stored Query [ITI-18]Registry Stored Query [ITI-18]