David,
FYI, There are forthcoming recommendations on including binary data in XML
without using base-64. I expect that these would be used when available in
implementation.
Heath
_
From: openehr-technical-boun...@openehr.org
[mailto:openehr-technical-bounces at openehr.org] On Behalf Of Sam Heard
Sent: Sunday, 11 March 2007 7:49 PM
To: dclunie at dclunie.com; For openEHR technical discussions
Subject: Re: ECG archetypes
Hi David
Absolutely not - what we need are readers that can make sense of data as a
blob and get these specified as suitable for use in an EHR. Do you recommend
any very good or very widely used specs which have readers that are publicly
available?
Cheers, Sam
David Clunie wrote:
Hi
I hope you guys are not considering yet another standard for
the encoding of bulk ECG data (as opposed to referencing it
or wrap it as a blob).
ECG's are analogous to images from radiology; large amounts
of bulk data, highly specific meta-data of little or no interest
to non-image aware applications and well-standardized already
by DICOM.
Unfortunately, ECG device and distribution vendors have been
slower to adopt standards than the medical imaging device
vendors, and so there are a plethora of them, SCP-ECG,
DICOM waveforms, HL7 V2 waveforms, and the FDA HL7-CDISC XML
submission standard, not to mention just storing a picture
of the ECG in a PDF file (the IHE consensus solution).
These standards also address the annotation of the waveforms
and the conclusions drawn from them by the acquisition device,
and it is probably only the latter that would be relevant to
be extracted into the EHR.
David
PS. As to the wrapping versus referencing question for the bulk
binary data, I just got through sending a 1.4GB 2,600 slice
cardiac CT angiogram to a colleague, which I presume nobody
would be crazy enough to base-64 encode and embed in an XML
document, for example. The point being that wrapping things
is not a scalable solution.
Mie Faerch Jensen wrote:
Greetings all;
We are two graduate students from Aalborg University, Denmark, taking our
master in Biomedical Engineering and Informatics. In this semester ?our
finale, we are working with complex data interoperability to an Electronic
Health Record (EHR). We are following the openEHR?s EHR architecture
standard,
and therefore also working with archetypes.
We have a few questions we would like you to help us deal with.
- What we are trying to investigate is how to represent a recorded
ECG-signal
in an archetype, and therefore we are wondering what the status is on
dealing
with ECG-signals as an archetype? So far we haven?t been able to locate an
ECG-
archetype, only the description of it as an observation-entry.
- We have described workflows and clinical information guidelines for the
observation and clinical evaluation of an incoming ECG-signal, but we are a
bit confused on how to map the clinical information guidelines to an
archetype. Can anyone give us an example on how this mapping is done?
Best regards
Mie F?rch Nielsen og Louise Pape S?rensen
Aalborg University, Denmark,
Master in Biomedical Engineering and Informatics,
10th semester
Reply-email: 06gr956d at miba.auc.dk
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--
Dr. Sam Heard
MBBS, FRACGP, MRCGP, DRCOG, FACHI
CEO and Clinical Director
Ocean Informatics Pty. http://www.oceaninformatics.biz/ Ltd.
Adjunct Professor, Health Informatics, Central Queensland University
Senior Visiting Research Fellow, CHIME, University College London
Chair, Standards Australia, EHR Working Group (IT14-9-2)
Australia
Ph: +61 (0)4 1783 8808
Fx: +61(0)8 8948 0215
UK
Ph: +44 (0)77 9871 0980
Fx: +44 (0)207 1174610
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