Re: [Gnumed-devel] Matching was Re: Mirth (2 of 3): HL7 import for the GNUmed project - test source message

[Karsten Hilbert]

-------- Original-Nachricht --------
> Datum: Thu, 12 Aug 2010 16:41:32 -0700
> Von: Jim Busser <address@hidden>
> An: lkcl Casson Leighton <address@hidden>
> CC: GNUmed list <address@hidden>
> Betreff: Re: [Gnumed-devel] Matching was Re: Mirth (2 of 3): HL7 import for   
> the     GNUmed project - test source message

> Luke asked on the lab wiki page (under todo) about what datetime stamps to
> use.
> 
> There exists:
> 
> 1. the datetime when the blood, urine etc was obtained from the patient
> (we have this as clin_when)
> 
> 2. the internal-to-the-lab-datetime when they generated the result AND any
> subsequent internal-to-the-lab-datetime when they altered / corrected /
> updated the result
> 
> 3. the datetime when the outgoing HL7 message was created (which not
> happen until requestor connects to "pull" it)
> 
> 4. the datetime when the result was picked up, and processed, by the
> receiving facility (praxis)
> 
> 5. the datetime when the result was acknowledged by a end-user qualified
> to take responsibility for it ("signing")
> 
> 6. the "on update" stamp for when any portion of a record is changed (we
> have this already as "modified_when")
> 
> 
> Over on the wiki, Luke wondered whether we should establish a new field
> "last updated" and set it to #3 above:
> 
>       "MSH 007 - date/timestamp of message sound good enough?"
>       
> http://wiki.gnumed.de/bin/view/Gnumed/LabImporters#TODO_which_also_involves_reviewi
> 
> However I think that it would be better to use #2 which is
> 
>       OBX 014 Date-Time of Observation (Test resulted by laboratory timestamp)
> 
> because it disambiguates (together with OBR 025 Result Status) whether an
> actual result had been changed, and at what time that became known in the
> lab, and can help us to not have to resign anything when all the lab did was
> to resend us a redundant copy of unchanged information.

Sounds right to me.

Please document the above choices and the decision in the wiki time
permitting.

Karsten
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