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What are the software requirements for implementing health information exchange?

In general, a RHIO will need three applications: a record locator service (RLS), a master patient index (MPI) which contains the matching algorithm to harmonize queries for clinical data with patient records, and an integration engine, for communication between the different participating entities in a RHIO.

The record locator service (RLS) receives incoming queries from authorized users, formats the contents of the message, and makes a query to the MPI with the matching algorithm. The algorithm determines which records in the database are likely matches using demographic details and the RLS then returns the location of the patient records to the user. No standard algorithms exist and the determination of what data can be used for matching is subject to local regulation and community consensus. Finally, an integration engine allows participating entities to exchange information.    

Resources:

• The Common Framework: Technical Issues and Requirements for Implementation (PDF - 400 KB)  - Developed by the Markle Foundation, this report discusses the technical decisions behind the Common Framework, as well as technical policies. (2006)
• Health Information Exchange: Architecture Implementation Guide (PDF - 693 KB)  - Developed by the Markle Foundation, this document focuses on the technical architecture for the transfer of protected health information through a national health information network. (2006)
• Record Locator Service - Technical Background from the Massachusetts Prototype Community (PDF - 3 MB)  - Developed by the Markle Foundation, "This document describes the early design process for the Record Locator Service (RLS) as implemented in Massachusetts, and is included here as background on the technical conversation around the design of the Connecting for Health prototype." (2005)