VistA reports 6690-2 Leukocytes with a variety of unit strings. Most can be confidently assumed to be be synonymous with the LOINC example unit of 10*3/uL (K/cmm, K/UL, K/MM3, X10-3/UL, K/cu mm, 10.e3/uL, X1000/uL). Some, however, have the same dimension and magnitude, but use different magnitudes in the expression, e.g., BILL/L, 10E9/L.
In these cases, we recommend using a valid UCUM string, but preserving the source magnitudes, e.g., 10*9/L. Is this in line with others’ practice?
From the information we share at Laboratory LOINC committee, there are organizations that store original units of measure and have a separate translated UCUM stored. We’re meeting this Thursday, June 6th, and I’ll sidebar with Stan Huff from his Intermountain Health days.
I emailed Stan instead of waiting for the in person meeting. Here is his response:
<span style=”color: #1f497d;”>I have no objection to what Jay proposes, but things would work fine just using the units sent (BILL/L, 10E9/L) because, if I have done the math right, the decimal point does not change. Or to put it another way these last two examples are still exact synonyms for 10*3/uL. </span><span style=”color: #1f497d;”>BILL/L and 10E9/L are not valid UCUM representations. The UCUM representation for billion is 10*9 , so I think the official UCUM units for billions per liter would be 10*9/L. Stan</span>
<p class=”MsoNormal”><span style=”color: #1f497d;”> PB thinks you’re both in agreement.</span></p>