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Originally Posted by dlife  Would the bg level differ in each drop of blood? Actually the last two readings are from same drop of blood. |
If the blood does actually differ slightly, then it's also reflecting your own BG, so I wouldn't worry about it. You can't claim on the spot that a test from one site is more "accurate" than a test from another. Unless the second site has food on it... but then the first may as well. I'd just ignore this issue, myself, concentrate on having clean hands if that is a possible issue.
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Is the +/-20 range difference possible in the same meter??
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Yes, that is what was meant. I don't know of a particularly accurate meter. There are better and worse ones. I've found my accuchecks replicate closer numbers than other brands. But that's just experience and personal knowledge. They still officially have a wide margin of error.
If I were you, I'd try this again to see if it's not normally a bit more consistent, and if you feel like blowing cash before your prescriptions, get your hands on another brand of meter, give that a go.
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So what should I take as my correct reading amongst all the three I listed above?
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None of them - that's the point. Having taken three though, you're probably best to take the average to work with. More meaningful is to consider BG tests over a range of time, (say all fasting or all post meal over 4 days) - the inaccuracy should in general be minimised and you will get a good "fuzzy" picture - which is generally adequate. Accuracy aint everything.
