What Does a Blood Sugar Reading of 244 Mean?
Every blood glucose meter claims that information technology's accurate. But what does accurate really mean in terms of blood glucose (BG)?
Pop Quiz
A. Does accurate hateful that your blood glucose meter volition prove y'all the truthful BG?
B. Does accurate mean that your blood glucose meter will show the same BG each time if you exam multiple times from the same finger stick?
C. Does accurate mean that your blood glucose meter volition show the aforementioned BG as a different blood glucose meter if you test from the aforementioned finger stick?
D. Is it none of the to a higher place?
Yep! D: None of the above ;) What?!
Meter Accuracy Reality
No calm blood glucose meter will show a true BG — simply a lab test tin do that. (And really, to be very technically correct, there is theoretically a truthful BG value, but it's impossible to measure — that's where statistics come in!)
We can only estimate what the true BG value is by taking a sample. In social club to be considered "accurate" and thus approved for use in at-dwelling house testing scenarios, the FDA requires that blood glucose meters provide:
- 99% of blood glucose measurements within twenty% of lab results
- 95% of blood glucose measurements within 15% of lab results
This literally translates to:
if your true BG value (measured in a lab test) was 100 mg/dL, your blood glucose meter could evidence as low as eighty mg/dL or as high equally 120 mg/dL, and the FDA would consider either number accurate considering both fourscore mg/dL and 120 mg/dL are results that autumn inside that 20% range of lab results.
This is called variance (or the amount of measurement error that the FDA allows in order to consider the reading "accurate") and the variance gets larger equally your truthful BG gets larger.
For example, if your true BG value (again, measured in a lab) was 400 mg/dL, your claret glucose meter could show as depression every bit 320 mg/dL or every bit loftier as 480 mg/dL.
Fifty-fifty with that 160-indicate spread, the FDA would nonetheless consider either number (and all numbers in betwixt) "authentic" considering the number is within 20% of lab results. 
Sampling: The Food Dye Examination
You lot might get different BG readings even from the same drib of blood considering of a concept called sampling.
Imagine that you have a drinking glass of water and you drib some blue food coloring into the glass. In this instance, the glass of water is your claret; the food coloring is the carbohydrate in your blood.
Different samples from that aforementioned glass might look more than blue or less bluish, depending on the way the nutrient coloring is mixed with the water. 
This is what happens when you measure your blood glucose.
The carbohydrate mixes into the blood. You might test a claret drop with your meter that has more glucose. You might test a blood driblet that contains less glucose.
Both will be reflected in your 2 different BG checks, and both will exist authentic.
Sampling: Blood Menses
Hither'southward another way to think about it. Just like the H20 and nutrient-coloring combo swirling effectually, churning different shades of blue, your bloodstream is constantly moving, churning different 'shades' of blood glucose.
Every bit your claret flows, and then do all the glucose molecules inside of it. Depending on which claret glucose sample you lot take, yous'll end up with a unlike sample with a unlike concentration of glucose.
What About Comparing Meters?
We've written nearly variation across blood glucose meters earlier, and it's definitely hard not to compare betwixt two blood glucose meters and decide that the meter that gives y'all the "amend" reading (the reading you desire to see) is the more than accurate one.
But really, each blood glucose meter uses unlike technology to produce a blood glucose reading, so you can't actually compare meters.
You tin can only compare a claret glucose reading to the true value, which y'all'll never know!
Every meter uses its proprietary technology to measure blood sugar and, therefore, has a specific measuring bias. Information technology's those biases that get us into trouble when we compare claret glucose across different meters.
Then what's a person with diabetes to exercise?
✔︎ Lab standard check
Check your blood sugar when you lot're getting blood drawn venously.
Yous can figure out the particular bias of your meter by comparing it to the almost accurate claret sugar reading: a venous plasma reading measured in a laboratory setting.
This lab result is non to exist confused with the blood sugar test done on another standard, at-home claret glucose testing device; that's the same type of testing every bit your meter!
Rather, use the aforementioned claret that'southward beingness used for your lab tests to simultaneously check claret sugar. And so, compare results.
✔︎ DTS seal of approving
Additionally, brand sure that yous're relying on a blood glucose meter from a manufacturer that makes meters that have earned the Diabetes Technology Society (DTS)'south postage stamp of blessing.
The DTS recently released a study that evaluated the accurateness of almost every commercially bachelor claret glucose meter. Just 6 meters got the DTS stamp of approval.
The aforementioned technology in the Agamatrix meter that earned a stamp of approval from DTS is in your One Drib | Chrome (manufactured past Agamatrix). :)
Then you should feel confident using your I Drop diabetes meter like a #diabadass.
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Source: https://onedrop.today/blogs/blog/accuracy-blood-glucose-meter
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