I’m trying to figure out the best way to capture the results of this test:
HIV 1 Quantitative Real Time PCR
HIV 1 RNA, QN PCR: <20, Not Detected, Ref: Not Detected, copies/mL
HIV 1 RNA, QN PCR: <1.30, Not Detected, Ref: Not Detected, log copies/mL
Reportable Range: 20 copies/mL to 10,000,000 copies/mL (1.30 log copies/mL to 7.00 log copies/mL)
<span style=“color: #636363; font-family: arial, sans-serif; font-size: 12px; background-color: #f7f7f7;”>70241-5: HIV 1 RNA [#/volume] (viral load) in Plasma by Probe and target amplification method detection limit = 20 copies/mL</span>
could be used for HIV 1 RNA, QN PCR: <20 copies/mL, and I could submit a code for a method detection limit of 1.30 log copies/mL. But when thinking about capturing “Not Detected”, this would have a property of [Interpretation], not [Presence], correct? (even though presence would have a nice structured answered list- are there answer lists for interpretation ever? I haven’t come across any yet.) And for a property of interpretation, how would I differentiate between the (copies/mL) instance vs the (log copies/mL) instance? In a quantitative property it would be part of the property itself. (i.e. [#/volume]).
To summarize, the end goal would be 4 results with corresponding LOINC codes:
HIV 1 RNA [#/vol] detection limit 20 copies/mL = <20 copies/mL
HIV 1 RNA [interpretation of copies/mL] detection limit 20 copies/mL = Not Detected
HIV 1 RNA [log #/vol] detection limit 1.30 log copies/mL = <1.30 log copies/mL
HIV 1 RNA [interpretation of log #/vol] detection limit 1.30 log copies/mL = Not Detected
Am I correct in wanting to use interpretation instead presence for property of “Not detected” results of quantitative labs?
Can answer lists be suggested for interpretations?
Is the best way to indicate detection limit within the code itself?
What is the best way to structure my LOINC code submission to account for interpretation of (#/vol) vs (log #/vol)?
I’m coming across quite a few quantitative+interpretation instances like this, and any ideas/thoughts/guidance would be appreciated. Many thanks in advance!