Relion versus Alphatrak2

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ajsandbe

ajsandbe

Member Since 2014
When Georgie first got diagnosed with diabetes my sister bought me an Alphatrak2 meter from the vet that she works for. Due to the high cost of test strips I cannot use the meter. But for the last few weeks I have been using both to check (just using up the test strips that came with the package) for accuracy and to see how much I should adjust the Relion's results. I have noticed some serious differences that vary quite a bit. 1. Alphatrak 127/ Relion 358 2. A 309/ R 307
3. A 109/ R 182 4. A 148/ R 552 5. A 127/ R 358

I read somewhere to subtract 80 points from the relion meter which is what I have been doing but I am unsure if this is correct. Is there a specific number that I should be subtracting from the Relion meter? I just want to make sure my testing is accurate and the Alphatrak threw me off. Any advice is greatly appreciated. Thanks!!
 
I read the Relion wrong tonight- I read 552 instead of 255 which made me have a minor meltdown. I think everything is okay. I do have an Alphatrak2 meter if anyone can get some use out of it.
 
First off you don't need to add or subtract anything just use the numbers on your meter. Our protocol is based on readings from a human meter.

Yes the alphatrac reads higher than a human meter because of its calibration. But normally only 30 points higher.

All meters have a variance of +/- 20% you can test the exact same drop of blood 3 times and get 3 different readings. The higher the number the bigger the range the true number could be in. So the bigger the discrepancy might be.

Don't drive yourself nuts trying for the exact number even lab equipment isn't that precise. What we are really looking for is trends

Mel and The Fur Gang
 
Actually, the dual test data I've collected so far suggests that at the low end, it is about 30 mg/dL different. At the higher end, it may be 40% or so different, ie, not a straight 1:1 relationship.

Were the tests you did on the same drop of blood? Or at the same testing time?

Here's a table with the +/- 20% ranges in it. And a graph.
 
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