Bill Walton wrote:

>It seems to me that question of "context" needs to be addressed before those
>task descriptions will have much value.  I'm thinking that Roles differ from
>country to country, and in most cases, by health-care setting within a
>country.  So just starting here we have a three-level hierarchy (Country ->
>Setting -> Role).  Once that's established, Responsibilities and Authority
>can be mapped.  Exceptions to Authority would need to be mapped.  Now we're
>at five levels, perhaps six depending on the approach to mapping exceptions.
>
>I wouldn't suggest even attempting to extend this to descriptions of the
>tasks.  Just establishing the taxonomy above would be a huge job; forget
>about the effort to maintain it over time.  Task descriptions would, IMO,
>make the maintenance task impossible.
>  
>
I think that may be a little over-pessimistic - at least for the kinds 
of tasks I have in mind to describe. The kind of thing I would suggest 
documenting would be:

- a simple chain of events: GP visit; request for test; test result; 
diagnosis or other evaluation; therapy or other action/advice;

- the management of any patient with the typical pattern of recurrent 
visits, monitoring of progress, education, occasional crisis episode, 
e.g. an asthma patient. This is bread and butter for doctors, but very 
interesting (and not trivial) to get right in the EHR, if we are to 
accurately represent not only what happens at each visit, but to string 
the visits together with links which document the causality and other 
relatedness of the items, so as to tell any carer who looks at it the 
"story of the patient" (something which Mike Mair, a NZ opthalmologist 
is always reminding us we should be concentrating on).

- scenarios to do with creation of fine-grained information by multiple 
clinicians in an ICU e.g. during a re-animation situation; when / what 
parts of this info hits the EHR?

- decision by clinicians/tools on what pieces of detailed episodic EPR 
to move up to shared EHR

- scenarios to do with management of patient in home care with automatic 
monitoring and controlling of devices (e.g. pill dispenser)

- medication management, from prescription to completion, for complex 
(but common) cases, e.g. chemotherapy; multi-drug aged patients

- scenarios where the patient is interacting with the EHR, e.g. adding 
data of weight, blood sugar etc, maybe adjusting their own dosage of a drug;

- attestation scenarios; e.g. a junior doctor commits a note about a 
patient to their EHR; it needs to be attested legally by a senior person 
before being completely legal, but in between time, it is clinically 
useful and _usable_ info whcih should be in the EHR;

- and so on.

What I believe the clinical part of this community needs to think about 
is: how can we codify what we do in such a way as to tell us how to 
design certain aspects of the EHR? We hope that most of the answers will 
be in the form of archetypes, templates, terminology, guidelines - i.e. 
knowledge resources; but we know that some tings will affect the 
concrete models of the EHR whcih we need to get right as best as 
possible in order to support all possible scenarios.

A lot of the design features of openEHR are in response to having 
thought carefully about specific scenarios and then generalising to 
categories of scenarios (i.e. by induction, if you will). The UML models 
might look simple, but they are not accidental.

>It seems to me that the value of such a collection would extend _much_
>further than the development community.
>
>  
>
one kind of additional value it would have is that scenario descriptions 
(as with all requirements) are the basis of test cases - you use them to 
test systems. So if your hospital is threatening to buy some expensive 
system, you can provide a large repository of test cases you believe it 
should satisfy as a means of vetting it.

- thomas beale


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