Hi,

I can see the difference between templates and archetypes and why the  
templates are needed
for UI:s. The problem is the there is no complete template  
specification.

Is there a time plan for when it will be finished?

Regards

Olof

---
Olof Torgersson

Associate Professor
Department of Computer Science and Engineering
Chalmers University of Technology and G?teborg University
SE-412 96 G?teborg, Sweden

email: oloft at chalmers.se
phone: +46 31 772 54 06


25 jul 2009 kl. 20.21 skrev Thomas Beale:

> Bert Verhees wrote:
>>
>>> yes - but to do this, they need to be working with templates.
>>> Archetypes on their own don't make sense as direct data-capture  
>>> models.
>>>
>> Thomas, I wonder why this is, maybe you can explain this or point  
>> to an
>> explanation.
>>
>
> Archetypes act as a way to standardise the *possible* data points  
> that could be captured about some topic, in any possible context  
> (i.e. type of patient, type of clinic etc). So for example, the  
> blood pressure archetype (see 
> http://www.openehr.org/knowledge/OKM.html#showArchetype_1013.1.130) 
>  contains the following data points in the 'data' part:
> systolic pressure (SP)
> diastolic pressure (DP)
> mean arterial pressure (MAP) - perfusion pressure used by  
> anaesthetists
> pulse pressure (PP) - difference between SP and DP
> comment
> Now, in actual real contexts, the things that can be used in a  
> meaningful way are one of the following:
> SP, DP // the usual one
> MAP - which is related by a formula to SP & DP (see 
> http://en.wikipedia.org/wiki/Mean_arterial_pressure)
> PP - either computed from SP - DP, or measured directly by some  
> devices
> MAP will never be needed in a normal GP or nursing context, and PP  
> won't usually be either, although I believe it is becoming moreso,  
> because the PP history is recognised as an indicator of some  
> problems. The point is, you will (probably) never create any data  
> set (such as a form or a message) that corresponds to a particular  
> clinical event (such as GP visit, etc) that contains all of these.  
> Instead, you will make a template, that contains the SP and DP,  
> possbly some other BP archetype items, and also a bunch of other  
> items from other archetypes. This latter combination of items is  
> what is being recorded in the specific situation. For another  
> context, e.g. emergency department admission, a different  
> combination of items will be recorded. Both could easily contain  
> common elements from the archetypes they use; this is why archetypes  
> exist - to standardise the semantic definitions of the information  
> items; templates exist to put them together (sometimes with further  
> constraints) for specific use cases.
>
> One reason that this is not always clear is that there are some  
> archetypes that would normally be used in their entirety in the  
> template, e.g. Apgar, Barthel, some lab results and so on (although  
> even then, the protocol information may or may not be included).
>
> hope this clarifies
>
> - thomas beale
>
>
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> openEHR-technical at openehr.org
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---
Olof Torgersson

Associate Professor
Department of Computer Science and Engineering
Chalmers University of Technology and G?teborg University
SE-412 96 G?teborg, Sweden

email: oloft at chalmers.se
phone: +46 31 772 54 06




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