Hi Andrew,
The dm+d medication model does contain these concepts and it was used as the
basis for constructing the
Australian Medicines Terminology (AMT) - Julie and Hugh (original authors of
dm+d)
came to Australia to help with this process.
The result (AMT) was handed to the Australian National eHealth Transition
Authority (NeHTA)
by a joint MSIA/DoHA working group over 4 years ago!
Since then NeHTA have "simplified it" and populated the structures at least for
PBS medications and are currently working on the rest
of the non-PBS medications
How much has been removed as part of the "simplification" I am unclear
You can access the AMT by going to the NeHTA Web site and registering for a
SNOMED licence (free for Australians).
You will then be able to download the AMT
Regards
Vince
Dr Vincent McCauley MB BS, Ph.D
CEO, McCauley Software Pty Ltd www.mccauleysoftware.com
President, Medical Software Industry Association www.msia.com.au
Vice Chair, HL7 Australia
p: +61298186493
f: +61298181435
----- Original Message -----
From: Paul Miller
To: For openEHR clinical discussions
Sent: Wednesday, January 21, 2009 6:31 AM
Subject: {Disarmed} Re: a model for medication strengths
Hi Andrew
The dm+d data model seems to me to provide some of this. From the dm+d data
model V2.3 from this page:
MailScanner has detected a possible fraud attempt from "195.97.218.30"
claiming to be MailScanner warning: numerical links are often malicious:
http://195.97.218.30/dmd_download.htm
"
pharmaceutical strength
The amount of ingredient substance (as identified by the attribute ingredient
substance identifier or basis of strength substance identifier as indicated
above).
This attribute indicates the quantity of the substance per defined unit of
measure in the Virtual Medicinal Product (e.g. one tablet, one ml) measured by
weight or volume per unit or concentration. An ingredient may be present
without a strength.
Pharmaceutical strength has 4 components, where a strength is provided the
strength value numerator (SVN) and strength value numerator unit (SVNU) are
mandatory. Strength value denominator (SVD) and strength value denominator
unit (SVDU) are used to fully express 'per' strengths.
EXAMPLES:
Paracetamol 500mg tablets
Ingredient SVN SVNU SVD SVDU
Paracetamol 500 mg
Paracetamol 250mg/5ml oral suspension
Ingredient SVN SVNU SVD SVDU
Paracetamol 50 mg 1 ml
Hydrocortisone 1% cream
Ingredient SVN SVNU SVD SVDU
Hydrocortisone 10 mg 1 g
"
would suggest a good starting point, perhaps?
--
Dr Paul Miller
Scotland, UK
Tel: +44 (0) 7711-346-928
2009/1/20 Karsten Hilbert <Karsten.Hilbert at gmx.net>
On Tue, Jan 20, 2009 at 11:48:17PM +1100, Andrew Patterson wrote:
> Now I realise this is pretty complex - for instance these are
> some of the medication strengths strings listed for some Australian
> medications..
>
> 0.3mg/mL (0.03%)
> 0.4mg-10.0mg-2.0mg/mL
> 0.54g-1.28g/10mL
> 0.375mg
> 1% w/w
> 1 Million KIU/100mL
> 10 dose
> 100mcg/capsule
Well, basically, "strength" should be "amount per amount".
Sometimes (as in the examples given above) there is assumed
knowledge involved, say, how many drops are in a milliliter.
So, with each of the "strength" indications one needs to
provide an algorithm and appropriate factors with which to
"reduce" it to a "normalized" form. That way it can be made
computable. Note that the above do not seem to all mean
quite the same things.
Those factors and algorithms could well be encapsulated into
dedicated "classes" as you suggested.
Karsten
--
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