Interoperable EHRs: it's all about the data
Electronic health records (EHRs) have been around for over 30 years now, but it is still hard to share information between health software programs. Traditionally, we have had vendors develop electronic health record software applications created entirely from scratch ‘in house’. Each one has been proprietary and the result has been a data structure that is unique for each software application.
The data within each vendor EHR are effectively silos of health information, with clinical content as simple as blood pressure represented differently in each system. Interoperability – the ability to unambiguously share health information between different EHR systems – has been elusive.
As a means to bridge the gap between each EHR, for more than a decade there has been a gradual growth in the development of agreed, standardised messages, documents and/or profiles.
Each of these have been mapped or transformed from the EHR’s proprietary data patterns to the agreed data pattern, so that they can be sent to other healthcare providers or exchanged with other EHR systems. This solution has enabled some success in simple health information sharing, mostly documents or reports such as discharge summaries or pathology results.
The downside to this approach is that each document or message can take years to reach consensus, so the process is effectively glacial and the amount of information available for sharing is limited to the sole purpose of these documents or messages. The unresolved question is whether this is a scalable approach as we want to share greater amounts of health information in finer granularity, and whether this is sustainable.
In order to try to change this paradigm, there has been a slowly emerging international approach to provide clinical leadership for defining the clinical data patterns, rather than leaving it to each vendor to ‘reinvent the wheel’. This has originated from over 20 years of research and development into electronic health records, and has been championed by the openEHR Foundation.
Posted in Australian eHealth