Research And Implementation Of Message Exchange Theory Based On HL7V3

Along with the extensive application of computer information technology and rapidlyincreasing population mobility, hospitals at all levels have introduced medical informationmanagement systems successively. This requires that electronic data among subsystems ofhospital and hospital systems achieve accurate and rapid transfer and sharing of medicalinformation through the computer network in order to facilitate inter-hospital departments orcross-regional medical services. Due to the various hospital information systems may be set upby different vendors, which results in a huge difference in medical data storage andrepresentation, information is difficult to exchange messages among systems. To solve thisproblem, the United States first proposed HL7standard to regulate a variety of data storage andrepresentation.The HL7standard has been widely used in Europe and the United States and other developedcountries in the field of medical information, however, due to the unbalanced development inthe field of medical information areas in China, medical information cannot be shared by alllevel health care systems, which gives rise to “information silo”. In this case, it is necessary tointroduce HL7standard which has been maturely used in developed countries to solve theproblem of sharing of medical information. In addition, because our country hasn’t develop anational standard, while the HL7version has evolved from HL7V2.X version to new version ofHL7V3, and HL7V3has the advantages which the HL7V2.X doesn’t have, HL7V3can beintroduced in order to minimize the upgrade costs.Through the study of HL7V3standard, especially after the study of the message exchangeprinciple, message parsing module, message creating module and message transmitting moduleof HL7V3message interface engine are implemented. In the aspect of message parsing module,a practical message parsing process is developed and implemented, and legitimacy of themessages are verified through the MIF and ITS files, and ultimately to make the HL7V3message easier to read, the function for converting the XML-based HL7V3message to treestructure has achieved. In the aspect of message creating module, through the study on theinformation model and HL7V3message creation process, the attribute handle, the RIM modelbackbone classes and a variety of relationships handles are implemented and encapsulated,which can be used to create HL7V3domain messages. In the aspect of message transmittingmodule, the MLLP and JMS transmission modes are achieved, and the users can select theproper mode to meet their needs. Ultimately a large number of different HL7V3domain messages are selected and tested, andthe HL7V3messages can be parsed, created and transmitted correctly, HL7V3messagemodules implemented fully meet the standard, which provides the underlying technical supportfor the hospital information system and related products, and also provides a solution for theinformation sharing among heterogeneous health information systems.