On 12-Feb-08, at 1:32 AM, Karsten Hilbert wrote:
OpenEHR defines three times regarding health care:
- time of clinical truth
- time of result obtained
- time of data entered into the EMR
Many times 1 and 2 will coincide but not always. GNUmed distinguishes
1+2 from 3: clin_when vs. modified_when.
It may suffice to copy, into tes_result.clin_when
OBR 007 (Specimen collection timestamp YYYYMMDDHHSS if time known
YYYYMMDD if time unknown)
this way, once a distinct result is obtained from this time, we could
avoid duplicates by making
(fk_type + clin_when) UNIQUE
and just updating values if they had been corrected, and/or appending
into note_provider (to be renamed note_test_org) if any more notes
had been added
I *think* we will be OK to declare
(fk_type + clin_when) UNIQUE
because I cannot expect there to be truly multiple values from a
single specimen collection time, from the same lab, having the same
code, given that multiple lines (as with culture reports) could be
put into note_test_org ...
... except I am now only thinking if the patient provides multiple
specimens like 3 collection cards for stool for occult blood, or if
there were multiple specimens --- biopsies or tubes of body fluid ---
all sent for the same test.
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