A technical concept has been developed which employs a service-oriented architecture (SOA) as an IT platform and ecosystem to handle different modalities, devices, and data streams in the OR. A SOA ecosystem is deployed to interconnect modalities of an anesthesia workplace and an endoscopic surgery workplace with a hospital information system. The integration of the anesthesia cockpit into a SOA based network is achieved with a disparate Web Application Server. This server physically connects to the data ports of the anesthesia unit and transforms ventilation and hemodynamic data into Web Services. The implemented Web Services for hemodynamic and respiration data are using an XML vocabulary that is predominantly taken from the ISO/IEEE 11073-10201 standard. Implemented Web Services rely on an adapted and standardized domain information model that forms the basis for the representation of medical device and vital signs semantics. Forthcoming research efforts will be directed towards an enhanced SOA based registry and repository that includes governance and policies of Web Services that are generated by networked medical systems.

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Medical device interoperability is still an issue. Standards exist only for specific areas like HL7 and DICOM, or have not been widely adopted like ISO/IEEE 11073 except for the domain information model at the semantic level. An approach that covers interoperability below the semantics is proposed. It is based on Web services which are widely accepted outside the medical device application domain. In particular the architecture is build on the upcoming Device Profile for Web Services (DPWS). It is a collection of existing Web services specifications for service discovery, interface description, event notification, and security. It is designed for resource-constrained devices and thus seems to be suitable as a basis for medical device plug-and-play.