Your Correction Ratio determines how much your blood sugar will drop in response to 1 unit of insulin. The total drop must be measured 2-3 hours later. It can vary, particularly in the morning, where you generally require more insulin to correct for a high blood sugar compared to the rest of the day.
Calculating your Correction Ratio is quite easy. Just enter the amount of insulin, and the corresponding correction it gives you e.g. 3 units of insulin at breakfast time drops you 9 mmol/162mg.
Now you need to check if your ratios are right.
If you get low after a breakfast correction (test 2-3 hours after), then you are getting too much insulin and you need to increase the BGL drop given by 1 unit. Try adding 1mmol / 18mg, and then test with the new ratio. However, if you are getting too high after breakfast (test 2-3 hours after), then you need more insulin. Try reducing by 1mmol / 18mg, and then test with the new ratio.
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