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Type 2 Readings From The Meter

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shire

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It might seem a daft question but I'm wondering about the values of the readings and if there is like a large difference between numbers, particularly after the point. By that I mean does it take a lot of time between readings to make a reading change from say 4.0 to 3.7 for example or could a reading be 4.0 then 3.7 just five minutes later? Could a reading change from say 8.0 to 4.0 in an hour for example or does it take a good few hours for that to happen?
 
A difference between 4.0 and 3.7 can be explained by the variance allowed by your meter which is -/+ roughly 15%. Basically it means no change. You could test five times in five minutes and get minute differences.

The larger values will be down to time, carb amounts, excercise, infection, stress etc.

So, while the small amounts are important it is the trends upwards/downwards that is what we are keeping an eye on. And of course keeping a record of.
The large differences are to be avoided at all times if possible. So, pre prandial to post prandial at two hours should be no more than 2mmol and lower than that is better.

Hope this helps.
 
shire said:
It might seem a daft question but I'm wondering about the values of the readings and if there is like a large difference between numbers, particularly after the point. By that I mean does it take a lot of time between readings to make a reading change from say 4.0 to 3.7 for example or could a reading be 4.0 then 3.7 just five minutes later? Could a reading change from say 8.0 to 4.0 in an hour for example or does it take a good few hours for that to happen?
Click to expand...

Ok so there are a couple of scenarios here.

Firstly lets look at meter innacuracies which on ISO compliant devices are under +/- 15%. So taking 2 readings close together will usually yield different results.

Then considering a big fall in glucose levels over an hour say, yes it's possible. It will depend greatly on your food intake, activity levels, medication and any combination of those factors.
 
Thanks. A couple of weeks back I felt a bit unwell - not so much unwell maybe as just not right, almost as if slightly drunk so I assumed it was down to low blood sugar. After testing, the reading showed 3.7. On another day when I felt pretty much the same as that, I tested it and it showed 4.3. Given the fact I am completely useless with figures, does the +/- 15% accuracy mean those two readings could have been roughly the same? As I say, I'm totally thick with figures so how does the 15% thing work, how do you calculate the 15% either side of the reading? Applying 15% of the 3.7 reading as +/- would mean it would be 0.55 +/- so roughly 4.2 and 3.2, is that right? A reading of 8.0 though would give a far bigger +/- difference of 1.2 which seems a lot so I mustn't have that right at all.
BTW, the meter I have is Accu-chek Mobile
 
shire said:
Thanks. A couple of weeks back I felt a bit unwell - not so much unwell maybe as just not right, almost as if slightly drunk so I assumed it was down to low blood sugar. After testing, the reading showed 3.7. On another day when I felt pretty much the same as that, I tested it and it showed 4.3. Given the fact I am completely useless with figures, does the +/- 15% accuracy mean those two readings could have been roughly the same? As I say, I'm totally thick with figures so how does the 15% thing work, how do you calculate the 15% either side of the reading? Applying 15% of the 3.7 reading as +/- would mean it would be 0.55 +/- so roughly 4.2 and 3.2, is that right? A reading of 8.0 though would give a far bigger +/- difference of 1.2 which seems a lot so I mustn't have that right at all.
BTW, the meter I have is Accu-chek Mobile
Click to expand...

Sadly (depending on your point of view) your arithmetic skills are better than you think..........
https://www.diabetes.co.uk/blood-glucose-meters/blood-glucose-meter-accuracy.html
 
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