Oldvatr
Expert
- Messages
- 8,453
- Type of diabetes
- Type 2
- Treatment type
- Tablets (oral)
What about us Blue Bloods?
What about us Blue Bloods?Bear in mind that blood is red and interstitial fluid is pale yellow. It is possible that blood could be diluted with interstitial fluid and some people wipe away the first drop and squeeze again, some people advocate not squeezing at all. I have never seen any instructions like that with a meter so I don't do either
They use a YSI analyser so it is normally venous blood ( if drawn by nurse) or can be whole blood for capilliary extraction in hospital, Modern YSI equipment have an option to provide plasma equivalent Doctors and hospitals use whole blood values, home meters use plasma. I am not sure what the in site conversion software uses at all, The DVLA figures are Plasma equivalent I believe,
The units for blood glucose level are mmol/litre and as meters are now calibrated for plasma I take this a being per litre of plasma. The conversion between average BG and HbA1c was arrived at empirically that is they measured the average BG and corresponding HbA1c for a lot of test subjects, compared the two and came up with a formula. A formula or conversion chart, unless very old, ought to require input of BG calibrated for plasma. So far I have only found this which specifically says plasma but unfortunately it is in US units.So what does the HbA1c use?
None of this makes sense to me. In the "old days" before meters calibrated for plasma and measured in whole blood, we were told that to compare our meter readings with our HbA1c we had to convert our meter readings to plasma. There is a converter on this website. Part of the blurb says Whole blood tests are typically approximately 12 per cent lower than plasma tests. In other words, our meter averages would expect to be typically 12% higher than our HbA1c, hence the converter.
https://www.diabetes.co.uk/whole-blood-readings-to-plasma-converter.html
Am I being thick, as usual?
Just noticed this on the same site.....The units for blood glucose level are mmol/litre and as meters are now calibrated for plasma I take this a being per litre of plasma. The conversion between average BG and HbA1c was arrived at empirically that is they measured the average BG and corresponding HbA1c for a lot of test subjects, compared the two and came up with a formula. A formula or conversion chart, unless very old, ought to require input of BG calibrated for plasma. So far I have only found this which specifically says plasma but unfortunately it is in US units.
http://www.diabeteschart.org/bloodsugarchart.html
My fingerpricking career started in hospital as that was where I was diagnosed - I was told to wipe finger, prick, squeeze, wipe away the first blob of blood, sqeeze again, apply blood to test strip.When I was in hospital last year the nurse came to check my BS 2 or 3 times a day. She always squeezed. This is the only time anyone else has given me a finger prick.
Certainly not thick. That is how it used to be a couple of years ago. I am not sure if the HbA1c converter accepts the new plasma readings directly - it should, but I cannot say for certain. The HbA1c being from the old YSI kit would have expected to be expressed as whole blood result, but should have also changed recently to correlate to the new plasma readings. Not sure is this has happened.So what does the HbA1c use?
None of this makes sense to me. In the "old days" before meters calibrated for plasma and measured in whole blood, we were told that to compare our meter readings with our HbA1c we had to convert our meter readings to plasma. There is a converter on this website. Part of the blurb says Whole blood tests are typically approximately 12 per cent lower than plasma tests. In other words, our meter averages would expect to be typically 12% higher than our HbA1c, hence the converter.
https://www.diabetes.co.uk/whole-blood-readings-to-plasma-converter.html
Am I being thick, as usual?
I was just going to comment that the Tee 2+ is a marvellous machine if it can predict your blood sugar in the future?Well looks like this is going to be interesting...
View attachment 29991
Edit to add no I don't bother to reset times or dates.....
Indeed.. but I'm liking the results..!I was just going to comment that the Tee 2+ is a marvellous machine if it can predict your blood sugar in the future?
Indeed.. but I'm liking the results..!
I'll have to wait another year until next HbA1c... unless I have another one done in the interim... ooh the suspense..But which is the most likely, according to the circumstances (before or after eating.) That is the BIG question.
No doubt all up to date tables use plasma BG, pity they don't mention it. I suspect you were hoping for a clue to your BG/HbA1c discrepency.@Oldvatr and @Mr_Pot
The charts you each linked to give exactly the same results as the one on this website. Or at least they do for my HbA1c.
https://www.diabetes.co.uk/hba1c-to-blood-sugar-level-converter.html
No doubt all up to date tables use plasma BG, pity they don't mention it. I suspect you were hoping for a clue to your BG/HbA1c discrepency.
I did one parallel test before I consigned my Code Free to the drawer. Pre dinner - Code Free with a batch that seemed OK 4.9, Caresens 4.3Evening pre dinner readings
Codefree 5.1
Caresens 4.4
Tee2 4.4
Curiouser and curiouser.. only a couple of cold chipolatas pre test and a coffee with cream ..
forgot to grab phone so no pic you'll just have to take my word for it...
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