Hi, I don?t mean to be too pushy on this but I think we are not really on the 
same grounds at the moment. I?ll try to summarise my points:


-          Re universality I agree with you as you describe but I have 
indicated that this pattern is unique to certain type of observations; so 
perhaps I shouldn?t have used the term universal but ?common? in many types of 
clinical findings as a result of some examination. The exclusions you give by 
examples are very appropriate.

-          It is perfectly possible, and indeed during the diagnosis of acute 
appendicitis essential, to denote absence of lump or ?lack of rebound reflex? 
is almost common expression and pathognomonic to the disease. So I don?t agree 
with you and my gut feeling is that all findings during physical examination 
may well be reported as absent.

-          Yes I?d be also very interested to identify and classify if possible 
which ones ? but again my gut feeling is that this may not be possible and that 
relies on the clinical context and semantics. Therefore instead of identifying 
these at the outset I think giving the modellers a method to tag these will be 
the pragmatic solution and enable consistency among modellers and 
implementations.

-          Re design patterns and tooling support ? I think this should be in 
place in any case. But as Ian has pointed out there is more to the problem than 
convenience for modellers. The problem is consistency among modellers and mode 
critically when these models need to evolve (which is almost guaranteed) then 
how to avoid changes in paths?i.e. many ELEMENTs will need to be converted to 
CLUSTERS. Conversely if you anticipate this and design accordingly you might 
end up having zillion of unnecessary CLUSTERS with single ELEMENTs?

Hey Ian! I liked your proposal?Never been to Bahamas

Cheers,

-koray

From: openehr-clinical-bounces at openehr.org 
[mailto:openehr-clinical-boun...@openehr.org] On Behalf Of Sam Heard
Sent: Thursday, 16 December 2010 9:22 a.m.
To: For openEHR clinical discussions
Cc: openehr-clinical at openehr.org
Subject: Re: GUI-directives/hints again (Was: Developing usable GUIs)

Hi All
I sense Thomas is right. If you look at the exam archetypes there is a pattern 
of unlimited normal statements. This allows anything to be said but for it to 
be classified as normal even if it is text. There is work to do on examination 
as it is fractal and varies on a case by case basis.
Happy to talk about this at the implementation meeting.

Cheers Sam

Sent from my extphoney

On 16/12/2010, at 6:24 AM, Thomas Beale <thomas.beale at 
oceaninformatics.com<mailto:thomas.beale at oceaninformatics.com>> wrote:
On 15/12/2010 19:20, Koray Atalag wrote:
Hi Tom, I agree that the this is best way how to ?represent? data technically. 
But what I suggest is, since this is a universal and repeating pattern for all 
clinical findings (and maybe more) can?t we have an extension in ADL such that 
we ?tag? a certain sub-tree and then this node is inserted into ADL source 
automatically. And the way we write queries and process that would be uniform 
and convenient.

Cheers,

I am pretty sure it is not universal. Consider any standard lab, e.g. full 
blood count. Each analyte that is reported is there; if a proper value can't be 
reported, e.g. haemolysed attached specimen, you get just a report with that in 
it; otherwise you get numbers (including things like 'trace' where appropriate) 
and normal ranges. This is a different pattern. A reflex test is going to 
report a reaction to a stimulus, for each of a number of locations on the body. 
This will be a different pattern again ('no reaction' is just a value among 
other values of reaction strength).

Your pattern might be a typical pattern for various kinds of physical 
examination, where the examination proceeds on the basis of looking for a very 
specific set of possible anomalies, in the way that colonoscopy does. But even 
then, physical exam of e.g. abdomen is not going to report 'lump: absent' if no 
lump was encountered in a routine check.

I agree it is likely to be a common pattern in some kinds of examination, and 
it would be interesting to know which ones, and how these could be categorised. 
I would suggest that what you are really after is a library of 'archetype 
design patterns' that are available to tools, enabling you to quickly build the 
definitions for a whole lot of nodes according to a chosen pattern.

My suggestion is to try to identify and document such patterns - I started a 
page on this about 1year ago at 
http://www.openehr.org/wiki/display/healthmod/Archetype+Design+Patterns+-+Initial+Thoughts

- thomas


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