Hi Daniel, sorry to hear you are having teething troubles getting your insulin doses sorted out. As you are relatively recently diagnosed it's more than likely that your insulin will need adjusting, and this may apply as much to your basal (slow-acting) insulin as your mealtime insulin. What can happen after diagnosis, particularly when you are seriously affected like you were with DKA, is that your pancreas can recover some function once it is being 'supported' by the insulin you are now injecting. This can make it difficult to predict things (it's often called a 'honeymoon period') because your pancreas may be erratically producing some insulin. Unfortunately, this period can last from a few weeks to months or longer, but hopefully things will settle for you soon
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The reason I mention the basal insulin is because this possible 'revival' in your pancreas can mean you also need reduction in this 'background' insulin. Basal insulin is designed to cover the glucose output from your liver - small amounts of glucose are trickled out 24/7 so that your body has energy available to keep your heart, brain, lungs, digestive system etc. working when you do not have a source of glucose available from the meals you eat. If the basal dose is too high then it can interfere with your calculations for your mealtime insulin (bolus) doses) - too much basal can mean you effectively have too much insulin for the food you eat, and this can lead to unpredictable lows
In the weeks after I was diagnosed I found myself reducing my basal doses quite often, in line with the advice I got from my DSN - have you been reducing yours? Have you tried doing a 'basal test'? This is where you try to check that your basal dose is correct by testing during periods of several hours at a time without eating carbs - if the dose is set correctly then your levels should stay steady. It's explained in more detail here:
https://forum.diabetes.org.uk/boards/threads/basal-testing-made-easy.19060/
Ignore the references to pumping, the principle is the same for injections.
Without ensuring your basal dose is correct and just keeping you steady and 'covering' the activity of your liver, it can be very difficult to get your mealtime doses correct. Also, I would also not rely too heavily on the advice of your meter for dose suggestions - it will have been programmed with ratios of carbs:insulin and these can change. Again, in the weeks after I was diagnosed my TDD (Total Daily Dose) of both basal and bolus insulins dropped from around 65 units to 45 units! Speak to your DSN about basal testing and possibly changing ratios
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Good luck - you will get there, keep testing and use your experiences and readings to inform your insulin calculations
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