Roger,

I believe I mentioned physiologic time in a recent e-mail message.  There
are many times that can be associated with an observation, especially an
observation of a blood test – e.g., time order given, time order received,
time blood drawn, time specimen arrived, time result calculated, time
result reported, etc.  There are workflows that could justify using any of
these times or adding new ones, but the most broadly & clinically useful
time for an observation is the point in time that it was true for the
patient, which is sometimes referred to as the physiologic time.  For a
blood test, it would be the time the blood was drawn.  For a questionnaire,
it would be the time that the question was answered.  In OpenMRS, our
assumption is that the obs_datetime will be a close approximation to the
physiologic time.

-Burke

On Wed, May 9, 2012 at 10:10 AM, Friedman, Roger (CDC/CGH/DGHA) (CTR) <
[email protected]> wrote:

> @Burke
>    Someplace on the wiki (order? obs?) I was reading something you wrote
> saying that for lab results, the obs date should be the "physiological
> date."  By that, do you mean the date of specimen collection (as opposed to
> the date the test was actually run by the lab)?
>
>

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