Why

[MarkStAlbans]

Indeed 🙂

I spent years as a control systems engineer dealing with exactly these issues 🙂

there are no absolutes in measurement

 

[helli]

Libre 3 monitors I think is next step and weight down by another couple of stone won’t go amiss

Is there a reason why you suggest this version of the Libre sensors?
The reason I ask is that the Libre 3 is not available to purchase in the UK. It is only available on prescription for a few people, usually those with Type 1 managed with an insulin pump.
Libre 2+ provides the same data, is used by thousands of people and is available to be purchase - you could subscribe for the 2 week free trial from their website .

 

[MarkStAlbans]

Is there a reason why you suggest this version of the Libre sensors?
The reason I ask is that the Libre 3 is not available to purchase in the UK. It is only available on prescription for a few people, usually those with Type 1 managed with an insulin pump.
Libre 2+ provides the same data, is used by thousands of people and is available to be purchase - you could subscribe for the 2 week free trial from their website .

I understand the only material difference is the physical enclosure size of the sensor, its smaller as I understand

 

[rebrascora]

In any measurement system there is a margin of error thats the nature of physical measurement systems and the statistical models on which they rely, I was reporting my experience.only, not recommending any course of action. 🙂

CGM isn't measuring HbA1c though. It is measuring your interstitial fluid glucose, then extrapolating it's results to try to predict your Blood Glucose and then taking your average Blood Glucose and using a formula to predict your HbA1c.
It is important to understand that HbA1c is a measure of the amount of glucose stuck to your red blood cells. Those cells live/exist for approx. 3 months during which time, depending upon the concentration of glucose in your blood, a percentage sticks to them and is not released, so cells that are more than 30 days old will still have more glucose stuck to them from prior to your current management, but obviously newer red blood cells will reflect your current BG levels and have less glucose. If you maintain your current good BG levels then after 3 months your CGM prediction will be pretty close to your actual HbA1c although most of us find that it slightly under predicts, but 2 weeks or 30 days into using it, it will be significantly adrift because it is measuring something quite different to HbA1c and until you have a full period of red blood cell life span it will not be a true prediction of your current HbA1c..

 

[Lucyr]

Its still the same after 30 days, just stating the facts from the technology.

30 days of cgm data isn’t a hba1c either. It’s just an average 30 days blood sugar multiplied by something to estimate what your a1c might be if you have that average blood sugar for another couple of months. Your actual a1c will be higher as you were higher for the two months before the last 30 days.

 

[rebrascora]

30 days of cgm data isn’t a hba1c either. It’s just an average 30 days blood sugar multiplied by something to estimate what your a1c might be if you have that average blood sugar for another couple of months. Your actual a1c will be higher as you were higher for the two months before the last 30 days.

So much more succinct than my laborious explanation above! 🙄

 

[MarcR]

I got diagnosed in Jan type 2 level 52 so stopped heavy drinking no spuds no white bread no white rice watched the carbs lost over 4 stone now here is the rub! Blood tested this week and still 52.
Can anybody enlighten me?
Regards

Do you ever test your blood with a glucose meter? Do you know what your fasting level is? What is it 2 hours after a meal?
What's you current waist to height ratio?
I would be very disappointed if I lost that weight and my hba1c did not change. It might also be worth asking for a c-peptide test to see how well your pancreas is working.

 

[Maz2]

It might be a time factor. I was diagnosed pre-diabetic a few years back and stopped eating biscuits, cakes, chocolates, desserts etc which \i did not have huge amounts of anyway. I came on here and got lots of advice finding out my diet of muesli and toast for breakfast, sandwiches at lunchtime and potatoes with every evening meal, pasta and rice when I went out were a disaster. I stopped all this, got hold of Michael Moseley's diet, took note of what people said here and, three months later when they checked again, it had increased slightly. I was devastated. It took me two years to get it down. Admittedly I was not diabetic at the time but, even so, it was still difficult to get it down despite all my efforts.

I suspect it will come down eventually.

 

[MarkStAlbans]

Did a little research on the libre 2+ accuracy levels. Abbot claim an 8.2% margin of error on measurement, supported by a reviewed statistical method (MARD)

This is quite good for a bio sensor, always bearing in mind its hysteresis between blood value and fluid value

 

[everydayupsanddowns]

While not getting distracted by the technical discussions about fingerstick glucose results, sensor glucose, and HbA1c prediction @Relax657 I just wanted to congratulate you on your weight loss, and reduction in alcohol intake.

Sorry that your HbAc has not (yet) reflected the positive changes you have made. Try not to be too discouraged. Hopefully your next results will have caught up with reality.

 

[trophywench]

As a person 'lucky enough' to have Libre 3s supplied by the NHS alongside mey latest insulin pump, the Ypso pump which operates alongside the Libre 3s in HCL, just looked and my projected HbA1C result were the blood draw for that test be taken today, would be 52. I'd be much more than happy with that but since I have far too many white blood cells and less red ones than normal, it's actually in the mid 60s. So - it is, as said, only ever a guess.