Type 1 Blood sugar levels post meal

Hello Miles and welcome.

miles9 said:

Could anyone explain what the levels should be during the third and fourth hour?

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Depends on injection timing, and the length of time the insulin works for you (generally 4-5hrs in most cases), some people are happy to have a post meal peak above 8+, others prefer to stay under 8. And what you eat! Pasta will have a long shallow rise lasting many many hours, a dessert of meringue would cause a short sharp rise.

The idea is to start at a good number, not to have too much of a peak 1,2 or 3 hrs after, and be back at the good number after that, and if you don't eat & inject then your basal should hold you at that good number. if you're worried about your basal requirements then perhaps you should do a basal test (do a search for it on this forum for more info)

miles9 said:

In the 1st hour it goes to 8.4 mmol, 2nd and 3rd hours are around 8 mmol and 4th hour is 7.2 mmol.

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Depends on your starting point!

If you nail the timing of the dose then your can achieve a rise of no more than 2mmol above the pre meal test...

those readings sound pretty steady but it all depends on what you were before eating....

If you don't feel comfortable sitting around at 7 or 8 mmol until your next meal then yes BUT do you know what your correction factor is? Suggest you speak to your diabetes care team.

How long have you been diagnosed with type 1 diabetes? Have you read think like a pancreas? If you want to "understand how this works" that book would be a good place to start.

There isn't a definite cut off point when novorapid stops working, the action time can be different in different people and will probably be different in the same person on different days. The action time for novorapid can be up to 5 hours - http://www.diabetesnet.com/about-diabetes/insulin/insulin-action-time