Safdar Ali (PhD Candidate)

Transcription

1 Architecting disparate ehealth systems interoperable through Web Services Safdar Ali (PhD Candidate) Fraunhofer-Institute for Biomedical Engineering (IBMT) St. Ingbert, Germany

2 Outline Research Areas of the Fraunhofer-IBMT TOPCARE e-homecare Platform Application of Semantic Web/Web Services/Ontologies in ehealth Functionalities to be offered by Health Information Systems for the interoperability Suggested Security Framework Augmentation of e-homecare platform with Web Service References

3 Research Areas of Fraunhofer-IBMT St. Ingbert Health Telematics (Homecare, Telemedicine, Secure medical communication, Semantic Web based applications) Microsystems in biology and medicine, microsensors and microintegration, active Implants Neuro prosthetics (Nerve-electrode-arrays, functional electro stimulation) Ultrasound systems Humboldt- Universität, Berlin Potsdam-Rehbrücke Cellular biotechnology & biochips Molecular cell-/ tissue engineering Stem cell research Cryo-biotechnology Sulzbach Fraunhofer Society of non-profit organisations applied R&D on contract base 56 institutes more than employees

4 Main Research Fields of Health Telematics Dept. Secure Communication in Medical Networks Development of interoperable and secure communication solutions for the public health system. e-homecare, mobile Healthcare, Telemedicine Telehealth systems for mobile care and homecare of high risk patients, elderly and care needing people. Open telecare platform solutions for telemedicine services. Functional and semantic interoperability between ehealth systems IT solutions for Biosciences Information systems for Cryo cell banks.

5 TOPCARE e-homecare and Telemedicine Platform Therapy surveillance by telemonitoring vital signs, in vitro parameters and device parameters: Home Ventilation Endurance Test and Exercises Coagulation Therapy Stroke Rehabilitation Medication Adherence TOPCARE Telehealth Server TOPCARE Box

6 TOPCARE e-homecare and Telemedicine Platform (cont.) Roche Diagnostics Coagucheck S Blood Coagulation Testing Dräger Medical Ventilator Careousel Pill Dispenser Soehnle S20 Weight Scale Boso Medicus Blood Pressure Roche Diagnostics Accucheck S Blood Glucose Testing Roche Diagnostics Urisys 1100 Urine Analyzer Dräger Medical Pulse Oxymeter

7 TOPCARE e-homecare and Telemedicine Platform (cont.) Patient Systems Healthcare Institution A (Browser-based view) ISDN Video ISDN Video Home Telematic Station (HTS) TCP/IP Socket Connection WAN/HTTPS Tele-Health Client (THC) Security Module Security Module Medical Device Medical Device DECT Medical Device Upload + Download Server Web + Application Server Tele-Health Server (THS) Home Telematic Box (HTB) Security Module Medical Device Medical Device Bluetooth Medical Device Central Patient Database Healthcare Institution B (Browser-based view) ISDN Video Tele-Health Client (THC) Security Module

8 TOPCARE e-homecare and Telemedicine Platform (cont.) Drawbacks/Limitations No interoperability with HL7, xdt etc. compliant systems. Interaction is limited to only the clients having Telehealth client (THC) module. Interaction is possible only through Web browsers (i.e. Internet Explorer, Netscape) No Application Programming Interface (API) is defined.

9 Semantic Web/ Web Services/ Ontologies Web Service: Interfaces and bindings are capable of being defined, described, and discovered as XML artifacts. Supports direct interactions with other software agents. XML based message exchanging via internet-based protocols. Service Broker UDDI Inquiry find_xxx UDDI Publish save_xxx Service Consumer XML WSDL Service Provider Client SOAP Service

10 Semantic Web/ Web Services/ Ontologies (cont.) Semantic Web: Making WWW contents machine-processable and machine-interpretable. To Achieve Automatic Discovery of Web Services Automatic Composition of Web Services Automatic Invocation of Web Services Automatic Interoperation of Web Services Automatic Selection of Web Services Ontology: Defines the terms used to describe and represent an area of knowledge. Used by people, databases, and applications that need to share domain information.

11 Semantic Web/ Web Services/ Ontologies (cont.) Dynamic Web Services UDDI, WSDL, SOAP Intelligent Web Services Static WWW URI, HTML, HTTP Semantic Web RDF, RDF(S), OWL Time line

12 Some Semantic Web based ehealth projects MedCIRCLE/MedCERTAIN To develop and promote technologies able to guide consumers to trustworthy health information on the internet. A collaborative system for assessing health information on the web. ARTEMIS To develop a Semantic Web enabled Web Services (SWWS) based interoperability framework for the healthcare domain. NOESIS To support health professionals in taking the best possible decision for prevention, diagnosis, and treatment. To generate an adaptable framework capable of reasoning about the patient s situation, preliminary diagnosis and dealing with administered therapies.

13 Functionalities for the Interoperability (HIS with Web Service+client) search Specialist Web Services Registry report (SOAP/HTTPS) refers (SOAP/HTTPS) search search refers (SOAP/HTTPS) visits General Practitioner (HIS with Web Service+client) report (SOAP/HTTPS) Hospital (HIS with Web Service+client) Patient

14 Functionalities for the Interoperability (cont.) Queries: Who has information about the patient xyz? (Broadcasting) Is patient s information available? What types of information? Get a particular type of information Sending/Receiving Information: Specific medical information Patient referrals Security: Storing the received information locally: Logging: Health professional s signature with particular method invocation for a particular patient for a particular type of information.

15 WS Security Framework Prominent concerns of a Security Framework Authentication Identity Authorization - Access Control Confidentiality Encryption Integrity - Tamper Proofing

16 WS Security Framework (cont.) 2. Validate HP s Internet ID VeriSign XKMS Web Service VeriSign Managed PKI Web Server of Healthcare Organization TSIK, or custom XML Interface 3. Query for Assertions 4. Return Profile VeriSign Profiling Web Service AMA Data Digital Trust Services 1. Health professional presents AMA Internet ID 5. Securely returned patient s data Health professional logs on Use of VeriSign s Healthcare Authentication Service (HAS)

17 TOPCARE Telehealth Server with Web Service Health Professional s System (HIS) xdt Compliant System Web Service Client Bind SOAP/HTTPS TOPCARE Telehealth Server (THS) Web +Application Server Find TOPCARE Web Service SOAP Engine UDDI/ebXML Publish TOPCARE Web Service TOPCARE Web Service Controller Find TOPCARE Patient Health Professional s System (HIS) Bind TOPCARE WS-Security TOPCARE Health Professional Non-HL7 Compliant System SOAP/HTTPS Web Service Client Central Patient Database

18 TOPCARE Telehealth Server with Web Service (cont.)

19 Security Framework for TOPCARE Web Service Health Professional TOPCARE Web Service TOPCARE Web Service Controller Request for Registration Returns Numeric Id Handle Registration Request Returns Numeric Id Register HP and generate a Numeric Id Numeric Id, HP Certificate Numeric Id, HP Certificate Validate Health Professional Certificate Certificate is O.K Certificate is O.K If valid, add Certificate into Database and Truststore Numeric Id, Request IBMT Certificate IBMT Certificate Handle Certificate Request IBMT Certificate Validate HP credentials Store IBMT Certificate in local Truststore Communication over HTTPS as SOAP messages Handle requests on HTTPS as SOAP messages

20 References TOPCARE An implementation of a Telematic Homecare Platform in Cooperative Healthcare Provider Networks Systinet, Introduction to Web Services Architecture Christoph B,, Dieter F., Alexander M. A Conceptual architecture for Semantic Web enabled Web Services (SWWS) Web Services Security Specification (WS-Security) OASIS (Organization for the Advancement of Structured Information Standards) Jun ARTEMIS: Deploying Semantically enriched Web Services in the healthcare domain Assuman Dogac, G. Laleci, S. Kirbas et al.

21 Any Questions?? Thank you very much for your attention and patience