Interfacing Insights for Hospitals

Supporting Each Stage of an HL7 Project with the Right Approach

Hospital interface projects can be challenging and rewarding. Projects are challenging due to the flexibility of the HL7 standard and the need to work with multiple parties, but they are rewarding when all clinical applications are exchanging data effectively. The end result is streamlined processing of clinical data through a hospital’s application environment (see illustration below).

Interoperability becomes one of the key objectives for a hospital. Connecting the healthcare can improve the experience of multiple constituencies. For example:

  • The patient experience is enhanced with faster processing and communications of key clinical information while accuracy in the communication of required tests and results is ensured through software tools.

  • The hospital experience is enhanced through more efficient operations both internally and externally – reduced cycle time in communicating patient data between systems and decreased costs through automation and elimination of constant data reentry.

  • The experience of a hospital’s key partners – physicians, clinics, imaging centers, and labs – is enhanced through a more effective means to receive patient orders and deliver patient results.

Consequently, an HL7 interoperability initiative is an important endeavor which benefits all entities within a hospital network. Pursuing the project in a well-planned manner and ensuring the selected interface solution supports each project stage are critical.

Stages of an HL7 Interfacing Project
To achieve the best result in an HL7 interface initiative, there are several stages an interfacing project will undergo.

Healthcare Interfacing Project Stages:

Outlined below are key points in each stage of interface development and support.

Stage Key Points
Developing HL7 interfaces Undertake a business analysis and departmental workflow review for the hospital environment

Review specifications and analyze gaps between application data support and the specifications

Define each hospital application’s data requirements

Identify the unique characteristics of the HL7 versions used by your interface partners (e.g., labs, clinics, imaging centers, etc.)

Accommodate the ‘custom’ HL7 definitions by defining the parsing rules needed for each partner (e.g., Z segments)

Translate the interface messages between HL7 versions

Build the communications level connections for the HL7 conversation


Testing HL7 interfaces

Collect message samples for interface unit testing

Check the sample messages for validation and conformance to the selected version of the HL7 standard and required customizations made before implementing

Unit test message translations

Test the protocol connection to ensure the HL7 message can be delivered effectively

Send defined messages to the destination application to ensure acknowledgement processing
Execute a system test of the interface

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