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Recent T2 diagnosis - requesting guidance on BGM data interpretation

Sax

Well-Known Member
Messages
91
Type of diabetes
Type 2
Treatment type
Diet only
Dislikes
No longer being prescribed metformin.
Hi,

I am a type 2 diabetic, diagnosed Autumn 2020 with Hb1Ac above 9% in November. I was started on 1 x 500 mg metformin tablet a day (not slow release), given some standard NHS healthy diet booklets, and left to my own devices since then due to NHS prioritisation of Covid vaccination. As I don't seem to be getting hb1Ac tests anytime soon and its approaching 9 months, I decided last month it was time to start doing my own using a finger prick test meter.

It has taken some time to get to hang of this and so today I did a deliberately "bad" meal to give confidence it will track and show high sugar levels. I would like some guidance on how to interpret this, as well as what to do going forward, if some of the experienced people here are willing to take a few moments to do so? As currently I'm struggling to get hold of anyone in the local NHS team to give guidance on this.

The "test" lunch was 2 x "granary" bread slices, tinned mackerel, 70% cocoa chocolate and (after 30 mins distraction) a small apple. Circa 50g of carbs, with ~15 g sugar, to be comfortably more than my normal meals and prove the meter works. (to be clear, I'd normally not eat this sort of meal at present).

Readings:
1) Pre-breakfast (fasting) = 5.3 mmol/l
2) Pre-test meal = 4.7 mmol/l
3) 1 hr after test meal =9.4 mmol/l (!)
4) 1.5 hr = 7.6 mmol/l
5) 2 hr after = 6.8 mmol/l


Anyway to get to the point:
1) To my inexpert eyes the above looks like I'm getting decently representative readings? (I was concerned it might be under-reading due to not getting enough blood on the strip when testing).
2) Pretty clear the spike in sugar levels was at 1 hr, but most guidance seems to focus on 2 hrs after a meal... so what is recommendation from experienced people on time after meals? I'm concerned if I start doing my more regular testing for normal meals at 2 hr window I may be thinking I'm OK when I've in reality just missed a giant spike. And as I waste enough strips / needles on failed reading attempts I'd prefer to do 1 x test per meal as much as possible.

Grateful to anyone patient enough to read all the above and able to try and help. And apologies if this guidance is already given clearly elsewhere that I've not yet located on the website.
 
If you don’t get enough blood on the meter it’ll issue an error and not give a reading. (Or the ones I’ve used do that)

the 2hrs is to see if you’ve returned close to your pre meal baseline. A type 2 that’s had too many carbs will not be able to bring the 1hr spike back down. A non diabetic will even though they too will also spike somewhat. The 1 hr reading can be useful too if you have the strips to spare but it will give different information than the 2 hr one.
 
Thank you. The advice on your signature link regarding a target of <2 mmol rise between pre-meal reading and 2 hrs after is helpful info.
 
Hi @Sax and welcome to the forum.
You say that you wouldn't normally eat as much as 50g of carbs per meal, so it seems you have adopted some sort of Low Carb way of eating. Each T2 tends to have a highly personalised response to particular carby foods and even different responses to mixtures of carbs and fat in a meal, so there is no 'one size fits all'!

However unless your normal BG readings are worse than those you got for your experiment, you seem to be doing well - certainly nowhere near levels matching a 9% HbA1C.
So don't worry about your next HbA1C, keep your maximum BG reading to below 8.0 mmol and your post meal (2hrs after first bite) readings down to no more than 2 mmol higher than pre-meal and your HbA1C will be pre-diabetic or even bac in the non-diabetic range - though it is a 3 month average, so it can't change in a few days.


Keep a food diary and record of the BG tests around those meals and you will soon be able to predict the BG outcome from your typical meals. So then you don't need to test for those meals, only test ones with 'risky' or out of the ordinary ingredients.
 
Thank you Ian. What you suggest is exactly what I plan to start doing, now I've gotten some confidence in the accuracy the meter readings and how to interpret them.
 
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